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WO2008113127A1 - Outil d'orientation de carotte - Google Patents

Outil d'orientation de carotte Download PDF

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Publication number
WO2008113127A1
WO2008113127A1 PCT/AU2008/000395 AU2008000395W WO2008113127A1 WO 2008113127 A1 WO2008113127 A1 WO 2008113127A1 AU 2008000395 W AU2008000395 W AU 2008000395W WO 2008113127 A1 WO2008113127 A1 WO 2008113127A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
orientation
tool
downhole
drill
Prior art date
Application number
PCT/AU2008/000395
Other languages
English (en)
Inventor
Andrew Beach
Shayne Beach
Gavin Mcleod
Original Assignee
2Ic Australia Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39765295&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2008113127(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from AU2007901412A external-priority patent/AU2007901412A0/en
Application filed by 2Ic Australia Pty Ltd filed Critical 2Ic Australia Pty Ltd
Priority to ES08714440.8T priority Critical patent/ES2653849T3/es
Priority to NO08714440A priority patent/NO2134921T3/no
Priority to AU2008229644A priority patent/AU2008229644B2/en
Priority to EP08714440.8A priority patent/EP2134921B1/fr
Publication of WO2008113127A1 publication Critical patent/WO2008113127A1/fr
Priority to ZA2009/07176A priority patent/ZA200907176B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/16—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors for obtaining oriented cores

Definitions

  • the present invention relates to a core orientation tool that can provide directional characteristics of a geological core sample extracted from the subsurface.
  • Core sampling is used to allow geological surveying of the subsurface for various purposes including exploration and/or mine development.
  • An analysis of the material within the core sample provides information of the composition of the subsurface.
  • it is necessary to have knowledge of the orientation of the core sample relative to the subsurface from which it was extracted.
  • Applicant has developed numerous devices, systems and methods for orientating a core sample including a method of orientating a core sample described in co-pending Australian patent application no. 2006901298; an orientation head described in International publication No. WO 07/109848; a core orientation system described in International publication No. WO 07/1137356; and an orientation device for a core sample described in International publication No. WO 03/038232; the contents of each of which is incorporated herein by way of reference .
  • the present invention is the result of Applicant's further research and development in the field of core orientation.
  • a core orientation tool for providing an indication of in situ orientation of a core sample extracted from a borehole by a core drill the tool comprising:
  • an electronic orientation system coupled with the core drill, the electronic orientation system configured, upon receiving a trigger signal, to log one or more first indications of orientation of the tool; and, a trigger system that provides the trigger signal upon detecting one or more downhole events associated with operation of the core drill.
  • a core orientation tool for providing an indication of in situ orientation of a core sample extracted from a borehole by a core drill the tool comprising:
  • an electronic orientation system coupled with the core drill, the electronic orientation system configured, upon receiving a trigger signal, to log one or more first indications of orientation of the tool; and, a trigger system that provides the trigger signal upon one or both of (a) detecting one or more downhole events associated with operation of the core drill, and (b) effluxion of time.
  • a core orientation tool for providing an indication of in situ orientation of a core sample extracted from a borehole by a core drill the tool comprising :
  • an electronic orientation system coupled with the core drill, the electronic orientation system configured to log one or more first indications of orientation of the tool; and, a trigger system that provides a trigger signal upon detecting one or more downhole events associated with operation of the core drill; and, wherein tool is configured to associate the one or more first indications of orientation with the trigger signal.
  • the trigger signal may be one of a plurality of trigger signals.
  • the tool may be further configured to log different first indications of orientation, for example dip, roll and azimuth upon receipt of different trigger signals.
  • the one or more downhole events may comprise respective physical events arising from motion of the tool or the drill in the borehole.
  • the motion may comprise one or a combination of :
  • the trigger signal may be provided upon detecting a predetermined sequence of downhole events such as a cessation of drilling followed by motion of the tool in an uphole direction.
  • the sequence of events may further comprise commencement of drilling prior to the cessation of drilling.
  • the stopping and starting of drilling may be detected by sensing actual rotation of the core drill by using sensors or devices mounted on or adjacent to a rotating side of the backend assembly.
  • sensors or devices mounted on or adjacent to a rotating side of the backend assembly may comprise an inductive RPM sensor, accelerometer or a gyroscope .
  • the tool 10 may be further configured to log or record time between one or more of the downhole events, for example the time between cessation of drill and motion in an uphole direction; and/or time between cessation of drilling and the provision of the trigger signal. Such information may be beneficial in accessing the accuracy or degree of confidence in the orientation readings.
  • a core retrieval system for a core drill comprising:
  • a core tube having an uphole end and a downhole end, the downhole end provided with an opening for receiving a core sample cut by the core drill;
  • a core orientation tool in accordance with the first aspect of the present invention wherein the core orientation tool is coupled to the core tube at a location uphole of the downhole end of the core tube.
  • the core retrieval system may further comprise a backend assembly coupled to the uphole end of the core tube and wherein the core orientation tool is attached to the backend assembly uphole of the uphole end of the core tube.
  • a further aspect of the present invention provides a method of logging in situ orientation of a core sample extracted from the ground by a core drill comprising:
  • the downhole events may be indicative of a, or an imminent, core break.
  • Detecting of the one or more downhole events may comprise detecting an uphole motion of the device.
  • the detecting of the downhole event may comprise detecting a cessation of drilling prior to detecting the uphole motion of the device.
  • the detecting may further comprise detecting commencement of drilling prior to detecting cessation of drilling. Further, the detecting may comprise detecting a cessation of downhole movement of the device prior to detecting the commencement of drilling.
  • the tool comprises a switch that is activated by the tool, a downhole device such as an inner barrel assembly to which the tool is attached, or the drill, tagging the toe of the borehole.
  • the switch may comprise a Hall effect switch, an optical switch, a pressure switch, and a mechanically operated electrical switch.
  • the first indications of orientation may comprise one or a combination of borehole dip, borehole azimuth, core orientation, core dip and core azimuth.
  • a core retrieval system for a core drill comprising: an inner core tube having an uphole end and an opposite downhole end provided with an opening for receiving a core cut by the core drill; and, a core orientation tool coupled to the inner core barrel and movable inside the inner core tube in an uphole direction by abutment with the core, the core orientation tool comprising an electronic orientation device which upon receiving a trigger signal logs one or more first indications of orientation of the tool; a trigger system that provides the trigger signal to the electronic orientation device; and a core face orientation device which records rotational orientation of a core sample, wherein the electronic orientation device is in a known rotational position relative to the core face orientation device.
  • a core retrieval system for a core drill comprising: a core tube having an uphole end and an opposite downhole end provided with an opening for receiving a core sample cut by the core drill; a core orientation tool coupled to the inner core tube and movable inside the inner core barrel in an uphole direction by abutment with the core sample, the core orientation tool comprising: an electronic orientation device which, upon receiving a trigger signal logs one or more first indications of orientation of the tool; and a trigger system that provides the trigger signal to the electronic orientation device.
  • a further aspect of the present invention provides a core orientation apparatus for providing an indication of orientation of a core sample extracted from a borehole by a core drill the apparatus comprising: an electronic orientation device which upon receiving a trigger signal logs one or more first indications of orientation of the tool;
  • a trigger system that provides the trigger signal to the electronic orientation device
  • the trigger system may provide the trigger signal on the basis of effluxion of time from a reference time.
  • the reference time could be the time the tool is inserted into a core drill, or at a time when or after the core face orientation device records the orientation of the core face .
  • the trigger signal is delivered on multiple occasions during a period between the core orientation tool being inserted into the core drill and a time after the core face orientation device records the orientation of the core face.
  • the trigger system provides the trigger signal to the electronic orientation device upon detecting one or more downhole events associated with the operation of the drill .
  • the one or more downhole events may comprise one or more physical events arising from the motion of the tool in the borehole.
  • Figure 1 is a schematic representation of an inner barrel assembly and core tube to which an embodiment of a core orientation tool is coupled;
  • Figure 2 is a cutaway view of the core orientation tool and adjacent parts of the inner barrel assembly to which it is coupled.
  • Figure 3 is a partially exploded schematic representation of a further embodiment of a core orientation tool in accordance with the present invention
  • Figure 4 is a partially exploded representation of a third embodiment of the core orientation tool
  • Figure 5 is a section view of the core orientation tool shown in Figure 4.
  • Figure 6 depicts the use of a template for transferring indications of core orientation captured by the tool to a core .
  • orientation is intended to mean one or more of “dip”, “roll”, and “azimuth” of an apparatus, tool, core sample, borehole, or other structure in relation to which orientation data is required or desired.
  • electronic orientation device is intended to denote an electronic device or system that utilises electronic sensors and transducers such as but not limited to accelerometers, inclinometers, gyroscopes and magnetometers .
  • downhole direction is intended, unless the context clearly suggests otherwise, a direction that increases distance along the hole away from a collar of the hole.
  • the downhole direction is the same as the direction of gravitational acceleration.
  • the downhole direction is in a direction opposite to the direction of gravitational acceleration.
  • uphole direction is intended, unless the context clearly suggests otherwise, a direction that decreases distance along the hole away from the collar of the hole.
  • the uphole direction is opposite the direction of gravitational acceleration.
  • the uphole direction is the same as the direction of gravitational acceleration.
  • FIGS 1 and 2 illustrate an embodiment of a core orientation tool 10 in accordance with the present invention.
  • the core orientation tool 10 is shown in association with an inner barrel assembly 11 which comprises a core tube 12 for receiving a core being cut by a core drill, and a backend assembly 14 that is attached to the core tube 12 for lowering and retrieving the core tube 12 from the core drill .
  • the core tube 12 is of conventional construction while the backend assembly 14 is modified by the inclusion of an adaptor 16.
  • the tool 10 is coupled at one end to the conventional core tube cap 18 of the backend assembly 14 with the adaptor 16 being used to couple an opposite end of the tool 10 to the remainder of the backend assembly 14.
  • the tool 10 is in a known or measurable spatial relationship with the core tube 12. Further, as the core sample is rotationally fixed inside the core tube 12, at least shortly before and during a core breaking action, the orientation data relating to the core tube 12 can be related to the in situ orientation of the core sample .
  • the tool 10 comprises an electronic core orientation device or system 20 housed within a body 22 that is coupled to and between the core tube cap 18 and the adaptor 16.
  • the electronic core orientation device 20 is configured to log one or more first indications of orientation of the tool (ie, core orientation) upon receiving of a trigger signal.
  • the tool 10 includes a trigger system 24 that provides the trigger signal upon detecting one or more downhole events associated with the operation of the core drill. These events may particularly relate to the core breaking function of the core drill and/or various sequences of events expected prior to core breakage.
  • the system 20 comprises multiple sensors and transducers for sensing various events and orientation data of the tool 10 and core drill.
  • the sensors may comprise for example accelerometers, gyroscopes, physical switches, magnetometers, vibration sensors, inclinometers, inductive RPM sensors, flow sensors and pressure sensors. Some of the sensors and transducers send information to the trigger system that analyses the information to determine when to provide the trigger signal .
  • Other sensors and transducers, notionally forming an orientation module 26, may be either in an idle state or continually providing data indicative of core and/or bore hole orientation, however these sensors and transducers are not activated and/or the orientation data is not logged until the trigger system 24 provides the trigger signal.
  • the orientation system 20 may further comprise a transceiver 28 coupled to an antenna 30 to communicate with a hand-held computer or other like device. The function of this will be explained in greater detail later in the specification.
  • Embodiments of the tool 10 are able to log in situ orientation data relating to the core and the borehole from which the core is extracted at a time shortly before or at core breakage. This is done by arranging a trigger system 24 to issue the trigger signal upon sensing particular events or sequences of events that are expected to occur when a core is broken from the ground.
  • One or more of the downhole events relate to physical events arising from the motion of the tool 10 and indeed the core drill in the borehole.
  • One of the telltale physical events of a core break is an uphole motion of the core drill and thus the tool 10.
  • the trigger system 24 may be configured to issue the trigger signal when sensors in the module 26 detect an uphole movement or acceleration or a change in direction of motion from a downhole direction to an uphole direction. While such motion is characteristic of a core break, other events or motions may also be sensed which increase the degree of confidence that the uphole motion is related to a core break. Examples of such events or motions include:
  • the trigger system 24 may be arranged to issue the trigger signal upon the module detecting in sequence commencement of drilling, cessation of drilling and a motion in an uphole direction.
  • the sensing of the commencement and cessation of drilling may be via the use of vibration sensors in the module 26. It is known that during drilling as a core bit is bearing against rock, vibrations of known characteristics will be generated.
  • the trigger signal may be one of a plurality of trigger signals provided upon detection of different downhole events. That is a trigger signal may be provided when commencement of drill is detected, another when cessation of drilling is detected and another when an uphole motion of the tool 10 or drill is detected. Thus logging (recording) of data will commence prior to the breaking of the core. Additionally different orientation indications may be logged at different trigger signals. For example dip may be logged at when the trigger system detects drilling has stopped (e.g. detecting no rotation of the core drill following previously detecting the commencement of drilling; and core orientation may be logged upon the trigger system detecting a core lifter case gripping the core just prior to the core break.
  • the tool 10 and more particularly the electronic orientation system 20 comprises a memory device for storing logged data.
  • the trigger signal may be considered to act as a pointer to identify the logged orientation data at the time the trigger signal (s) where provided so that the orientation data can be correlated to particular downhole event, particularly the core break.
  • sensors may be provided in the module 26 or trigger system 24 to sense the speed, direction or change in speed or direction of rotation of the core drill. For example upon commencement of drilling, the sensor will detect rotation of the core drill, while on cessation of drilling the sensor will subsequently detect a change in the speed of rotation and more particularly a zero speed of rotation.
  • a sensor may comprise an inductive RPM sensor, accelerometer or gyroscope having a component on or adjacent a rotating section of the backend assembly 14, such as for example on an uphole side of bearing 32 of the backend assembly.
  • detecting the commencement and cessation of drilling include by detecting flow of fluid through or around the backend assembly 14.
  • fluid is pumped through or around the core drill and backend assembly during drilling with the flow being cut off when drilling ceases. Therefore detecting a change in the flow of water will also be indicative of the cessation of drilling.
  • uphole motion may typically be sensed by an accelerometer, other types of sensors including optical sensors or lasers may be used for sensing motion in an uphole direction.
  • a substantive benefit of the tool 10 over other core orientation devices that rely on the logging of time to correlate orientation data to a core is that the tool 10 does not require the use of timers by human operators and is therefore less susceptible to error.
  • the above described embodiment of the tool 10 may be considered as a "drop and forget" sensor which will automatically log core orientation data shortly before or at the time of a core break.
  • the tool 10 may be further configured to provide borehole azimuth and vertical core orientation relative to azimuth. It is known to use gyroscopes to obtain azimuth information when logging boreholes. However gyroscope technology is not suitable for use in downhole core orientation during the drilling process. The reasons for this include that the gyroscopes are prone to drift when operated for extended periods as would be required when lowering the gyroscope through the core drill; the inability for the gyroscope to maintain accurate orientation when exposed to sudden movements such as a shunt or vibration as typically would occur when dropping a backend assembly down a drill string; and, the need for the azimuth measurement to be made relative to a known reference point.
  • an embodiment of the tool 10 may comprise a gyroscope 34 or similar device for logging azimuth and dip. This is enabled by the use of the trigger system 24 which will only trigger the gyroscope 34 to move from an off or idle state to a logging state at the same time as it supplies a trigger signal to the measurement module 26. Prior to the trigger system 24 providing the trigger signal, the gyroscope 34 is either off or in an idle state. Upon receipt of the trigger signal, the gyroscope 34 is activated to commence tracking changes in orientation.
  • the gyroscope 34 continues to tracking changes in orientation.
  • Orientation of a collar of the borehole may be used as a known reference orientation.
  • changes in orientation since the issuance of the trigger signal can be related back to the collar orientation so as to enable determination of the azimuth of the tool 10 and the borehole at the toe of the hole substantially at the time of a core break.
  • This in effect provides a single survey shot at the bottom of the hole.
  • This data may be used to build an ongoing survey of the borehole for determining its path when combined with a measurement or estimate of the hole depth. This may be determined by simply counting the number of rods in the core drill at each core run.
  • the gyroscope 34 will only need to track changes in the orientation of the tool 10 after drilling has stopped, the need to track changes during the descent of the tool down the hole and during drilling is avoided. This substantially reduces the running time of the gyroscope therefore reducing the drift that may occur. It also obviates the need for the gyroscope to track changes in high vibration periods during drilling thus avoiding a significant loss of accuracy.
  • the tool 10 is used as a stand alone tool to obtain orientation data.
  • the tool 10 may be used in conjunction with a core orientation system of the type described in Applicant's International application No. WO 2007/137356.
  • the core orientation system in the abovereferenced publication comprises a combination of:
  • an electronic orientation device which may have some features common to the current device 10;
  • a core position indicator adapted for engagement with the core tube 12 when on the ground
  • a remote unit such as a hand-held computer that communicates between the tool 10 and the core position indicator.
  • the transceiver 28 in the tool 10 communicates via wireless communication with the hand-held computer which in turn transfers data to the core position indicator. More particularly, the tool 10 logs orientation data of a reference point on the core tube 12 relative to a first datum at the time the particular downhole event has occurred, ie, at or shortly before a core break. The reference point on the core tube need not be a physical marking. Once the core tube 12 is retrieved and placed in a stable position say on a core tray, the tool 10 is again operated to log orientation data of the same reference point on the core tube to a second datum. A rotational displacement ⁇ from the first datum to the second datum is calculated by the hand-held computer and wirelessly communicated to the core position indicator.
  • the core position indicator is then rotated about the core tube 12.
  • the core position indicator When the core position indicator is moved to a position where it is rotated by the appropriate rotational displacement ⁇ from the second datum, it emits a signal to indicate the position of the first datum.
  • the core position indicator also includes a guide in the form of a slat having an elongated slot for receiving a scribing or marking device such as a pencil.
  • the forward most end of the slat extends over the front of a core lifter case 36 and a portion of the core extending from the core lifter case.
  • the marker is then used to mark the core lifter case and/or core to signify the location of the core relative to the particular datum.
  • the core position indicator may be modified over and above that described in the above referenced application by the inclusion of a sensor to sense when a marker has been run along the slot to signify that a marking has been made on the core lifter case and/or core.
  • the core position indicator and the hand-held computer can record how accurately an operator marks the core by comparing its position when marked to its required position. This accuracy of marking information can then be transferred back to the hand-held computer and integrated with the original orientation information.
  • the information contained in the hand-held computer is transferable to a removal medium so that all the information can be provided to the recipient of the core.
  • the core position indicator may be arranged so as to prevent a user from marking the core until the core position indicator is correctly orientated. This may be achieved for example by having a moveable gate that slides across the slot to block the slot when the core position orientator is not in the correct orientation.
  • the trigger system may be modified to provide trigger signals on based on one or both of (a) one or more downhole events, and (b) effluxion of time.
  • the time triggers may comprise one or a combination of:
  • the trigger system 24 may trigger the sensors in the module 26 to record one, or a combination of readings of orientation at a point/points in time:
  • the trigger system 24 may cyclically provide trigger signals for a prescribe period of time after the first trigger is provided.
  • trigger signals may be provided every 10 seconds for a two minute period.
  • the electronic orientation device 20 may be arranged so that upon receiving a trigger signal, it logs the one or more first directional characteristics cyclically for a prescribed period of time, for example every 10 seconds for a 2 minute period.
  • Figures 3-6 illustrate various core orientation apparatuses 100 which comprise a combination of the core orientation tool 10 together with one or more secondary orientation devices.
  • one of the secondary orientation devices may be a core face orientation device which records the in situ orientation of the face of the core.
  • Another secondary orientation device that may be incorporated into the apparatuses 100 is a bottom orientator which records the location of a zero gravity vector at the toe of the hole provided that the hole is inclined to the vertical.
  • the secondary orientation devices may be mechanical or electronic.
  • the trigger system 26 is depicted as being contained in the common housing 22 with the remainder of the electronic system 20. However this need not be the case and the trigger system 26 may be physically separate from the tool 100 but in communication remainder of the electronic system 20 (for example by radio communication) to allow delivery of the trigger signals.
  • the trigger system 24 may provide trigger signals based on the same downhole events described in relation to the first embodiment.
  • This embodiment of the apparatus 100 comprises: a secondary orientation device which provides core face orientation and is in the form of a profile device 120; and, body 122 having a downhole " end 124 and an uphole end 126.
  • the body 122 comprises a lock body 127, a latch body 128 and an anchor 130, which are described in detail hereinafter with reference to the embodiment shown in Figures 5 and 6.
  • the electronic orientation device 20 is located downhole of the body 122.
  • the device 120 may take the form of the face orientator as described in Applicant's above referenced International publication No. WO 07/109848.
  • the device 120 comprises a substantially cylindrical body 132 having a plurality of internal axially extending holes 134 for seating respective pins 136.
  • the pins 136 are held within the holes 134 with a degree of resilience so that if an axial force is placed on the pins 136 in the uphole direction, the pins 136 can slide within the body 132, but when the force is removed, the pins 136 maintain their relative position in their holes 134.
  • the body 132 is also provided with a bearing scale 138 marked on its outer circumferential surface 140. The scale provides markings in five degree increments from 0° to 360°. The 0° mark is aligned with a positional reference mark 142 provided at a downhole end of a shaft 144 that extends into the electronic orientation device 20.
  • the mark 142 also provides a zero reference for the electronic orientation device 20 so that by coupling of the device 120 to the electronic device 20 both are keyed to the same zero reference.
  • the face orientator 120 provides a profile recording of a toe of the hole from which a core 112 is cut. It will be understood by those skilled in the art that the toe of the hole becomes an uphole face of the core 112.
  • the device 120 is constructed as a single use device that, upon extraction of the core, is removed from the apparatus 100 and is stored with the core 112. Prior to this occurring, the scale 138 is marked with an angle denoting the orientation of the core relative to the zero degree mark on the scale 138. This marking may be obtained by transferring data from the electronic device 20 to the device 120 by an intervening hand held telemetry device (hand held computer) that interrogates the device 20 to obtain for example the tool face orientation data at the time the trigger signal is provided by the triggering system 26.
  • hand held telemetry device hand held computer
  • This bearing can then be physically marked on the scale 138. For example if the tool face orientation was 35° relative to the marking 142, then an indelible mark can then be made on the 35° position on the scale 138.
  • Figure 4 illustrates a further embodiment of the apparatus 100.
  • the tool 10 in Figure 4 is located at the uphole end 126 of the body 122 and, an additional secondary orientation device in the form of a mechanical bottom orientator 146 is coupled between the downhole end 124 of the body 122 and the core face profile device 120.
  • the bottom orientator 146 is provided with three balls 148a, 148b and 148c (hereinafter referred to in general as "balls 148”) disposed within respective races 150a, 150b, and 150c (hereinafter referred to in general as "races 150").
  • the balls 148 Prior to the bottom orientator 146 being activated the balls 148 are free to roll within their respective races 150. Accordingly, by action of gravity, provided that the apparatus 100 is disposed in a borehole that is not absolutely vertical, the balls 148 will roll to the lowest point within their respective races. When the bottom orientator 146 is activated, the width of the races 150 is reduced so that the balls 148 are clamped in their races. This prevents any further rolling of the balls and thus maintains the indication of the bottom of the hole.
  • the bottom orientator 146 is operated by the apparatus 100, and in particular the core face profile device 120, tagging the bottom of the borehole.
  • the operation of the bottom orientator 146, the latch body 128 and the anchor 130 are described in detail in Applicant's above referenced applications WO 03/038232 and WO 2005/078232. Nevertheless a brief description of the operation of these components is provided below with particular reference to Figures 4 and 5.
  • a shaft 152 which is provided with the key mark 142, extends axially through the races 150 and up into the lock housing 127 and latch body 128.
  • the device 120 is coupled to a downhole end of the shaft 152.
  • the lock housing 127 includes a tubular extension 156 which has seats 157 on its outer surface for respective latches 158 that are pivotally coupled to the latch body 128 and can extend through windows 160 formed in the latch body 128.
  • a shroud 159 is attached to a downhole end of the lock housing 127 and covers the bottom orientator 146.
  • a recess 161 is also formed in the lock housing 127 between the seats 157 and the shroud 159.
  • a further spring 164 is held in a cavity between the latch body 128 and the extension 156 and acts to bias the extension 156 and thus the lock housing 127 in a downhole direction.
  • Another spring 166 acts between the latch body 128 and an anchor sleeve 168 of the anchor 130 biasing the sleeve 168 toward a shoulder 170 formed about an anchor body 172 of the anchor 130.
  • a plurality of anchor balls 174 are retained within the anchor sleeve 168.
  • the anchor balls 174 roll along an outer surface 176 of the anchor body 172.
  • the outer circumference of the outer body 172 is formed with a tapered portion 180 that leads to a circumferential recess 182.
  • the anchor body 172 also has, at its down downhole end, a portion 184 of a first constant inner diameter, then a contiguous tapered portion 186 that has an increasing inner diameter, and which then leads to a further portion 188 having a constant inner diameter greater than the inner diameter of the portion 184.
  • a trigger seat 190 is attached to a uphole end of the shaft 152 and a plurality of trigger balls 192 are each seated partially in a circumferential groove 194 formed in the trigger seat 190 and in holes 196 formed in an uphole end of the extension 156.
  • the apparatus 100 is loaded into a downhole end of a core tube 12 by first inserting the end provided with the tool 10. Eventually the latch dogs 158 abut a downhole end of the core tube 12 preventing further insertion of a tool 100. During the insertion, the anchor body 168 slides axially away from the shoulder 170 so that the anchor balls 174 roll along the tapered portion 180 and thus move radially inward.
  • the spring 166 pushes the sleeve 168 in a uphole direction causing the anchor balls 174 to commence to ride up the tapered length 180 to a position where they extend radially outward from the sleeve 168 to an extent where they bear against an inner surface of the core tube 12.
  • the core tube 12 is then lowered into a core drill 193 via a conventional backend and wire line or other insertion method, with the core drill being suspended above the toe of the borehole.
  • the core face profile device 120 extends from the shroud 159 and a drill bit 195 coupled to a downhole end of the core drill 193. During this time, the orientation balls 148 are free to roll within their races 150.
  • the core drill is then lowered onto the toe of the hole resulting in the pins 136 sliding axially within the cylindrical body 132 to provide a profile of the toe of the hole.
  • the axial motion of the shaft 152 may be used to activate a switch such as, but not limited to, a microswitch, a Hall Effect switch, an optical switch or a pressure switch, which may be considered as forming part of the trigger system, to provide a trigger signal for the electronic orientation device 20.
  • the electronic orientation device 20 can then log data relating to the orientation of a tool 10, the borehole in which it resides, and/or the core 112.
  • the logging of information by the electronic device 20 may occur at a predetermined frequency for a predetermined period of time. For example the electronic orientation device/system 20 may log orientation data every 10 seconds for a two minute period after receipt of the initial trigger signal .
  • the electronic orientation device 20 may be arranged so that the logging of indications of orientation occur only when trigger signals are received from both motion of shaft 152 and at least one other sensor or transducer of the trigger system 24.
  • Template 198 comprises a pair of parallel lines 200 for location on opposites sides of the orientation balls 148, and a pointer ' line 202 that extends parallel with an centrally between the tram lines 200.
  • An elongated slot 204 is cut in the template 198 and has one edge 206 in alignment with the pointer line 202. The slot 204 extends over the scale 138 on the body 132 as well as over a portion of the core sample 112.
  • An operator can use a marker such as a pen or pencil to draw line segments 208a along the edge 206 from the body 132 across the scale 138 and 208b along the core 112. Indication of orientation logged by the electronic orientation device 20 may be obtained and marked on the core 112 in the same manner as described in Applicant's above referenced Australian application no. 2006902873.
  • a marker such as a pen or pencil to draw line segments 208a along the edge 206 from the body 132 across the scale 138 and 208b along the core 112.
  • Indication of orientation logged by the electronic orientation device 20 may be obtained and marked on the core 112 in the same manner as described in Applicant's above referenced Australian application no. 2006902873.
  • both the tool 10 and the mechanical orientation device 146 also enables auditing of the apparatus 100 to provide a degree of confidence in the orientation data obtained therefrom.
  • a comparison can be made between the same indications of orientation obtained from each of the devices. For example if bottom of hole indications provided by the separate devices are within a acceptable tolerance range (e.g. up to 5°) a high degree of confidence is provided that each of the devices 20 and 146 is providing reliable indications of orientation.
  • a acceptable tolerance range e.g. up to 5°
  • potential errors can be flagged on site to enable corrective action.
  • the combination of the core tube 12 and the core orientation tool 10 forming the apparatuses shown in Figures 3-6 comprise what is believed to be a unique core retrieval system in that the electronic orientation device 20 is, at least at the time of deployment, located at a downhole or front end of the core tube 12. More particularly, as will be appreciated from the above description, the apparatus 100 being at the front or down hole end of the core tube 12 is physically close to the core sample 112 at the time, or one of the times, at which the electronic orientation device 14 logs orientation data of the tool 100. It is believed that this may give rise to higher accuracy in the orientation data recorded than other systems in which electronic orientation devices are located at a backend of the inner core tube, i.e. between an uphole end of the inner core tube and an overshot . In this regard, inner core tubes typically come in lengths of three or six metres.
  • various embodiments of the tool 10 may perform self checks and provide users with information regarding the status of the tool 10.
  • Status messages may include one or a combination of low battery power, communications error, system faults.
  • the tool 10 may also collect and process data so as to provide users with a measure of the accuracy and reliability of the recorded orientation data.
  • the data collected by the tool 10 to provide orientation information may be analysed using statistical measures of its accuracy.
  • Log data may be analysed to identify the presence of any movement during the logging of orientation data.
  • the direction of motion may also be determined and provided to a user.
  • the tool 10 would typically comprise three accelerometers to provide acceleration data about the X, Y and Z axes respectively. Rotation of the core drill at the time of the core break would be indicated by readings from these accelerometers. More particularly the tool 10 may provide the operator with information regarding the proper operation of its components parts and systems. If a component or system fails the tool 10 could report the failure to the operator via the handheld control unit. If the failure occurs or is detected while the tool 10 is down a bore hole it can be reported to the operator via the handheld control unit ounce the tool has been recovered to the surface.
  • the tool 10 could also be capable of performing a complete self check that verifies the correct operation of the entire system.
  • This self diagnostics could be run on demand by an operator or automatically when the operator is preparing the tool for a core run (being run down a bore-hole to perform its function) . In this way a faulty tool would not be used for a core run and result in a failed orientation.
  • the tool 10 may also be able to provide information to the operator regarding the certainty of a provided orientation measure.
  • the certainty of a orientation measure can be determined by analysing the tools sensor input before during and after the orientation measure is made. When analysed the sensor data may reveal that there was an unwanted environmental condition present when the orientation measure was made.
  • the unwanted environmental condition could be motion in the form of a linear movement, rotation or vibration. It could also be some other environmental condition such as a high or low temperature.
  • the results of the analyses could be reported to the operator in one or a combination of the following ways:
  • the information provided by the tool in the above ways will be useful in identifying procedural errors made by the operators of the tool. For example if the core drill was spinning when the orientation was measured the tool 10 would report that the orientation is uncertain because rotation was detected during the orientation. It could also report that the likely cause of the rotation was that the core drill was spinning. In future the operator will know to ensure that the core drill is not spinning when the orientation is being measured. Similarly if the core drill was being raised or lowered when the orientation was measured the tool 10 could provide a relevant report to the operator.
  • a mechanical orientation device 146 which utilises three orientation balls 148.
  • this orientation device may comprise only a single orientation ball.
  • the mechanical orientation device may include a washer that is indented with a mark representative of the location of the bottom of the hole such as described in Applicant's international publication no. WO 03/038232.
  • Embodiments of the invention may also include in addition or as an alternate to the mechanical orientator 146 a mechanical inclinometer an example of which is described in Applicant's above referenced international publication no. WO 03/038232.
  • core face orientation may be obtained by other devices including, marker pencils and scribes, optical or electromagnetic imaging and distance measuring devices.
  • the logging of azimuth can be achieved using any known electronic system when measured by the electronic orientation device 20, or any known mechanical system when measured by a mechanical orientation device 146. These include for example the use of magnetometers to sense magnetic direction when used in conjunction with nonmagnetic drilling equipment or if attached in a position outside the drill string to avoid magnetic interference.
  • Azimuth may also be recorded using gyroscope type sensors to measure inertial change in position from a known reference point; or by use of a gyrocompass or north seeking gyroscope type sensor.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un outil d'orientation de carotte (10) permettant de fournir une indication sur l'orientation d'une carotte de forage (112). Cet outil comprend un dispositif électronique d'orientation (20) qui, dès réception d'un signal de déclenchement, consigne une ou plusieurs indications sur l'orientation de l'outil (10). Un système de déclenchement (24) envoie des signaux de déclenchement au dispositif électronique (20) sur la base de l'un ou des deux événements suivants : (a) la détection d'un ou de plusieurs événements de fond de trou et (b) l'écoulement du temps. Les événements de fond de trou se rapportent à la rupture de la carotte et peuvent inclure la détection du déplacement de l'outil vers le haut du trou, l'arrêt du forage ainsi que le commencement du forage.
PCT/AU2008/000395 2007-03-19 2008-03-19 Outil d'orientation de carotte WO2008113127A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES08714440.8T ES2653849T3 (es) 2007-03-19 2008-03-19 Una herramienta de orientación de testigos
NO08714440A NO2134921T3 (fr) 2007-03-19 2008-03-19
AU2008229644A AU2008229644B2 (en) 2007-03-19 2008-03-19 A core orientation tool
EP08714440.8A EP2134921B1 (fr) 2007-03-19 2008-03-19 Outil d'orientation de carotte
ZA2009/07176A ZA200907176B (en) 2007-03-19 2009-10-14 A core orientation tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007901412A AU2007901412A0 (en) 2007-03-19 A core orientation tool
AU2007901412 2007-03-19

Publications (1)

Publication Number Publication Date
WO2008113127A1 true WO2008113127A1 (fr) 2008-09-25

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PCT/AU2008/000395 WO2008113127A1 (fr) 2007-03-19 2008-03-19 Outil d'orientation de carotte

Country Status (7)

Country Link
EP (2) EP2134921B1 (fr)
AU (2) AU2008100249B4 (fr)
ES (1) ES2653849T3 (fr)
NO (1) NO2134921T3 (fr)
PT (1) PT2134921T (fr)
WO (1) WO2008113127A1 (fr)
ZA (1) ZA200907176B (fr)

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WO2010094060A1 (fr) * 2009-02-17 2010-08-26 Imdex Technology Australia Pty Ltd Système d'orientation de carotte modulaire
WO2012012839A1 (fr) * 2010-07-30 2012-02-02 Globaltech Corporation Pty Ltd Système, dispositif et procédé d'orientation d'échantillon de carotte
WO2013106885A1 (fr) * 2012-01-17 2013-07-25 Globaltech Corporation Pty Ltd Améliorations apportées à une installation et procédés pour la prospection de fond de puits et système d'acquisition de données et pour une opération de forage
WO2014043751A1 (fr) * 2012-09-19 2014-03-27 Reservoir Nominees Pty Ltd Système d'orientation multifonction
WO2014053012A1 (fr) * 2012-10-05 2014-04-10 Minnovare Pty Ltd Appareil d'orientation de carotte
AU2008230012B2 (en) * 2007-10-18 2015-06-11 Borecam Asia Pte Ltd Core Orientation Measurement System
WO2015164394A1 (fr) * 2014-04-21 2015-10-29 Longyear Tm, Inc. Ensemble tête de carottier avec outil d'orientation d'échantillon intégré et système d'utilisation associé
AU2015261610B2 (en) * 2012-09-19 2017-06-22 Reservoir Nominees Pty Ltd Multifunction orientation system with failover measurement system
EP2513412A4 (fr) * 2009-12-16 2017-08-09 Longyear TM, Inc. Outils de carottage avec passages externes de fluide
WO2017132736A1 (fr) * 2016-02-04 2017-08-10 Imdex Global B.V. Procédé et système pour permettre un transfert de données d'orientation de sondage à la surface
NO20161581A1 (en) * 2016-04-08 2017-10-09 Huygens As A core drilling system and method for obtaining an orientated rock core sample using said core drilling system
NO343894B1 (en) * 2016-03-04 2019-07-01 Devico As Low resistance core sample marking system and method for orientation of a marked core sample
WO2021170896A1 (fr) 2020-02-28 2021-09-02 Stockholm Precision Tools, S.L Outil, système et procédé d'orientation de carottes dans la perforation de puits
US11125038B2 (en) 2014-08-27 2021-09-21 Globaltech Corporation Pty Ltd Downhole surveying and core sample orientation systems, devices and methods

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ES1280689Y (es) * 2021-09-29 2022-01-28 Stockholm Prec Tools S L Dispositivo y sistema para la orientacion de muestras de nucleo
CN116464411B (zh) * 2023-05-09 2024-02-23 山东省地质矿产勘查开发局第七地质大队（山东省第七地质矿产勘查院） 一种地质钻探用防掉钻取芯装置

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AU2008230012B2 (en) * 2007-10-18 2015-06-11 Borecam Asia Pte Ltd Core Orientation Measurement System
AU2008230012C1 (en) * 2007-10-18 2018-11-01 Borecam Asia Pte Ltd Core Orientation Measurement System
WO2010094060A1 (fr) * 2009-02-17 2010-08-26 Imdex Technology Australia Pty Ltd Système d'orientation de carotte modulaire
EP2513412A4 (fr) * 2009-12-16 2017-08-09 Longyear TM, Inc. Outils de carottage avec passages externes de fluide
WO2012012839A1 (fr) * 2010-07-30 2012-02-02 Globaltech Corporation Pty Ltd Système, dispositif et procédé d'orientation d'échantillon de carotte
AU2020233780B2 (en) * 2010-07-30 2022-01-20 Globaltech Corporation Pty Ltd Core Sample Orientation System, Device and Method
AU2019201146B2 (en) * 2010-07-30 2020-10-08 Globaltech Corporation Pty Ltd Core orientation system
US9739135B2 (en) 2012-01-17 2017-08-22 Globaltech Corporation Pty Ltd. Equipment and methods for downhole surveying and data acquisition for a drilling operation
WO2013106885A1 (fr) * 2012-01-17 2013-07-25 Globaltech Corporation Pty Ltd Améliorations apportées à une installation et procédés pour la prospection de fond de puits et système d'acquisition de données et pour une opération de forage
AU2018202364B2 (en) * 2012-01-17 2019-08-22 Globaltech Corporation Pty Ltd Improvements to equipment and methods for downhole surveying and data acquisition for a drilling operation
AU2015261610B2 (en) * 2012-09-19 2017-06-22 Reservoir Nominees Pty Ltd Multifunction orientation system with failover measurement system
WO2014043751A1 (fr) * 2012-09-19 2014-03-27 Reservoir Nominees Pty Ltd Système d'orientation multifonction
WO2014053012A1 (fr) * 2012-10-05 2014-04-10 Minnovare Pty Ltd Appareil d'orientation de carotte
US10830013B2 (en) 2014-04-21 2020-11-10 Longyear Tm, Inc. Core barrel head assembly with an integrated sample orientation tool and system for using same
US10047581B2 (en) 2014-04-21 2018-08-14 Longyear Tm, Inc. Core barrel head assembly with an integrated sample orientation tool and system for using same
CN107109899A (zh) * 2014-04-21 2017-08-29 长年Tm公司 具有集成的样本定向工具的岩心筒头组件及使用该组件的系统
CN107109899B (zh) * 2014-04-21 2020-09-04 长年Tm公司 具有集成的样本定向工具的岩心筒头组件及使用该组件的系统
AU2015249889B2 (en) * 2014-04-21 2019-08-01 Globaltech Corporation Pty Ltd Core barrel head assembly with an integrated sample orientation tool and system for using same
WO2015164394A1 (fr) * 2014-04-21 2015-10-29 Longyear Tm, Inc. Ensemble tête de carottier avec outil d'orientation d'échantillon intégré et système d'utilisation associé
US10465463B2 (en) 2014-04-21 2019-11-05 Longyear Tm, Inc. Core barrel head assembly with an integrated sample orientation tool and system for using same
US11466529B2 (en) 2014-04-21 2022-10-11 Longyear Tm, Inc. Core barrel head assembly with an integrated sample orientation tool and system for using same
US20240183239A1 (en) * 2014-04-21 2024-06-06 Veracio, Ltd. Core Barrel Head Assembly With An Integrated Sample Orientation Tool And System For Using Same
US20230124651A1 (en) * 2014-04-21 2023-04-20 Longyear Tm, Inc. Core barrel head assembly with an integrated sample orientation tool and system for using same
US11125038B2 (en) 2014-08-27 2021-09-21 Globaltech Corporation Pty Ltd Downhole surveying and core sample orientation systems, devices and methods
WO2017132736A1 (fr) * 2016-02-04 2017-08-10 Imdex Global B.V. Procédé et système pour permettre un transfert de données d'orientation de sondage à la surface
AU2017201518B2 (en) * 2016-03-04 2021-11-18 Devico As Low resistance core sample marking system and method for orientation of a marked core sample
NO343894B1 (en) * 2016-03-04 2019-07-01 Devico As Low resistance core sample marking system and method for orientation of a marked core sample
NO20161581A1 (en) * 2016-04-08 2017-10-09 Huygens As A core drilling system and method for obtaining an orientated rock core sample using said core drilling system
NO342901B1 (en) * 2016-04-08 2018-08-27 Huygens As A core drilling system and method for obtaining an orientated rock core sample using said core drilling system
WO2021170896A1 (fr) 2020-02-28 2021-09-02 Stockholm Precision Tools, S.L Outil, système et procédé d'orientation de carottes dans la perforation de puits
US11939830B2 (en) 2020-02-28 2024-03-26 Stockholm Precision Tools, S.L. Tool, system and method for orienting core samples during borehole drilling

Also Published As

Publication number Publication date
EP2134921A1 (fr) 2009-12-23
EP2134921A4 (fr) 2015-10-07
EP2134921B1 (fr) 2017-09-20
ES2653849T3 (es) 2018-02-09
AU2008100249B4 (en) 2008-12-18
ZA200907176B (en) 2010-12-29
PT2134921T (pt) 2018-01-02
AU2008229644B2 (en) 2011-06-16
AU2008100249A4 (en) 2008-06-12
EP3252264A1 (fr) 2017-12-06
NO2134921T3 (fr) 2018-02-17
AU2008229644A1 (en) 2008-09-25

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