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WO1993006335A1 - Procede et appareil pour aplanir les fluctuations de la boue de retour causees par l'effet de pilonnement d'une plateforme de forage - Google Patents

Procede et appareil pour aplanir les fluctuations de la boue de retour causees par l'effet de pilonnement d'une plateforme de forage Download PDF

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Publication number
WO1993006335A1
WO1993006335A1 PCT/GB1992/001673 GB9201673W WO9306335A1 WO 1993006335 A1 WO1993006335 A1 WO 1993006335A1 GB 9201673 W GB9201673 W GB 9201673W WO 9306335 A1 WO9306335 A1 WO 9306335A1
Authority
WO
WIPO (PCT)
Prior art keywords
mud
manifold
riser
platform
sea bed
Prior art date
Application number
PCT/GB1992/001673
Other languages
English (en)
Inventor
Marshall Graham Bailey
Jan Tørdjorm HATLESKOG
Original Assignee
Rig Technology Limited
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
Application filed by Rig Technology Limited filed Critical Rig Technology Limited
Priority to GB9403480A priority Critical patent/GB2273948B/en
Publication of WO1993006335A1 publication Critical patent/WO1993006335A1/fr

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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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling

Definitions

  • This invention concerns floating drilling platforms or vessels, particularly oil well drilling platforms of the type which are connected to the sea bed by a tubular sleeve known as a marine riser, down through which the drill and drill string extends to the sea bed from the platform and in which fluid is forced under pressure around the cutting end of the drill in the bore in the sea bed and is recovered as a mud which is forced under pressure up the inside of the marine riser.
  • a tubular sleeve known as a marine riser
  • the marine riser In order to accommodate heave of the platform due to movement of the sea, the marine riser includes a telescopic upper section, and the returning fluid (mud) is taken from above the telescopic join through a flow line to the mud processing plant.
  • the invention is applicable to all drilling vessels of the type described but is of particular application to platforms during slimhole drilling in which the pump rate is relatively low.
  • a drilling platform comprising a marine riser having a fluid outlet held in a fixed position relative to the sea bed, so that the flow pattern of the returning mud is decoupled from the heave motion of the platform.
  • a flow measuring device is located at or near the fluid outlet.
  • this may be achieved by using a tensioned wire or cable stretched between the sea bed and the platform, sometimes called a guideline tensioner; or alternatively where the riser is provided with tensioners the latter may be used.
  • Returning mud may be led from the fixed position outlet directly to the shale shakers through a flexible hose and pipe, located and dimensioned so as not to generate back ⁇ pressure at the fluid flow measuring device as the platform heaves up and down.
  • returning mud is tapped from the marine riser at a point just below the lower part of the telescopic section of the riser, and a feedpipe connects the tapping to an outlet manifold which is held stationary relative to the sea bed as by means of a tensioned wire.
  • outlet manifold is kept approximately level with the top of the lower part of the telescopic section of the riser.
  • a flexible hose connects the outlet manifold to fixed pipework mounted on the platform to deliver the returning mud directly to the shale shakers.
  • the flexible hose therefore comprises the flexible coupling between the platform and the sea bed.
  • the flexible hose, fed from the feedpipe is of larger diameter than the feedpipe, so that the flexible hose drains the feedpipe without creating back-pressure.
  • a typical size for the flexible hose is 6" if the feedpipe is 4".
  • the flexible hose is vented by means of a separate pipeline leading from a first point beyond and above its outlet end to a second point in the outlet manifold linking the feedpipe to the flexible hose.
  • the said first venting point may be in the said housing.
  • a non-return valve (or blocking valve) is employed to prevent fluid from getting into the air venting pipeline should the outlet manifold (between the feedpipe and the flexible hose) become full up.
  • the flow meter By placing the flow meter in the feedpipe, below the outlet manifold, the flow meter will remain full at all times during operation.
  • a secondary measure of flow can if desired be obtained by measuring the height of fluid in the marine riser, as by means of a pressure, proximity or level sensor.
  • a short spool is installed in the riser between a fixed part thereof extending to the sea bed and the lower part of the telescoping section thereof, to provide an outlet connection to the feed pipe.
  • valve means is provided to close off the spool outlet when the system is not in use or is to be disconnected.
  • the valve means may in addition or alternatively be remotely controllable.
  • the valve means may be self closing, should the control hoses fail.
  • the said outlet manifold is attached to the tensioned wire using a self-tightening wire clamping unit, which may to advantage be remotely operable.
  • the clamping unit is preferably such that it can be used to position the manifold and to be undamped when removing the manifold, as for example when using a tugger.
  • the remote control of the valve means and/or the wire clamping unit is preferably by means of compressed air.
  • the system can be flushed for cleaning and/or removing any build-up of cuttings by increasing the flow rate using the existing riser fill line to increase the flow through he outlet.
  • the feedpipe may be self-supporting (or supported by a support member which is secured to and extends upwardly from the lower stationary section of the marine riser below the telescoping section).
  • a support member which is secured to and extends upwardly from the lower stationary section of the marine riser below the telescoping section.
  • the invention also lies in a semi-submersible oil drilling platform when fitted with an oil drilling mud treatment and recovery facility adapted to be linked to a marine riser having an outlet manifold for delivering drilling mud returned from the bore, wherein the outlet manifold is held stationary relative to the sea bed and is connected to the treatment and recovery facility by means of a flexible pipeline, to decouple the up and down movement of the facility from the manifold without generating back ⁇ pressure thereat.
  • the invention also lies in a method of treating and recovering oil drilling mud from a bore in the sea bed via a fixed marine riser the upper end of which can telescope to accommodate up and down movement of a drilling platform attached thereto, comprising the steps of tapping the returning mud from a point on the riser below the telescoping upper end thereof and feeding the returning mud via a feedpipe to a manifold which is held stationary relative to the sea bed and is located at a level below the upper end of the lower fixed part of the two part telescoping section of the riser, so as to maintain a differential head between the level of the mud in the riser and that in the feedpipe sufficient to effect a substantially constant flow of mud therethrough, and feeding the mud from the manifold to mud treatment means via a pipeline at least a part of which is flexible and extends between the fixed manifold and the platform to decouple the up and down movement of the latter from the manifold without creating back-pressure thereat.
  • the invention also lies in a marine riser for use with a drilling platform, down through which a drill carried by the rig can pass for drilling the sea bed below and up through which drilling mud is forced under pressure for recovery and treatment (particularly to remove rock cuttings from the mud well bore), wherein the riser includes an upper two-part telescoping section to accommodate up and down movement of the platform due to the movement of the sea, characterised in that a tapping is provided in the riser below the lower of the two parts making up the telescoping section, and a feedpipe is provided which extends upwardly to a fixed point approximately at the level of the upper end of the lower of the two telescoping parts.
  • the precise position of the said fixed point is preferably adjustable and typically is determined by clamping to a tensioned wire, the lower end of which is anchored to the sea bed.
  • the feedpipe may be self-supporting and/or may be attached via a steady to the marine riser and/or to a tensioned wire stretched from the sea bed to, for example, the platform.
  • Figure 1 is a schematic illustration of a marine riser and return fluid discharge system incorporating the invention for use with a semi-submersible drilling rig (not shown) ;
  • Figure 2 is a view similar to Figure 1 but showing in greater detail an actual system as may be employed on a rig;
  • Figures 3a - 3c illustrate how a constant head is maintained during displacement of a rig due to heave.
  • Figure 4 is a modification of the embodiment of Figure 1 ;
  • Figure 5 is a modification of Figure 4.
  • FIGS 6 and 7 are further embodiments of the invention.
  • FIG. 1 the floor of a rig is denoted by reference numeral 10 and a marine riser extending from the floor 10 to the sea bed is denoted generally by reference numeral 12.
  • the riser passes through a blow-out preventer housing 1 located on the sea bed, and extends into the sea bed 16 and into the bore which is being drilled by a drilling head (not shown) at the lower end of a drill shaft 18. The latter extends co-axially down the centre of the marine riser 12.
  • Drilling fluid is pumped down the hollow interior of the drill shaft 18 in the direction of arrow 20 from a reservoir and pump located on the rig (not shown).
  • Hitherto drilling mud (a mixture of the original drilling fluid, solids, water, sand and the like) has been returned to the drilling platform through the marine riser and has been expelled from the upper end of the marine riser along an outlet tube 22 in the direction of arrow 24.
  • the drilling platform or rig is a semi-submersible vessel which floats, the height of the rig above the sea bed 16 will vary due to movement of the sea, wave motion, tide etc.
  • the marine riser 12 includes a telescoping section at its upper end.
  • the upper end of the fixed section of the marine riser is formed by an outer sleeve 26 and the movable part of the marine riser comprises an inner sleeve 28 which is telescopically slidable within the stationary sleeve 26 and is sealed at 30 and 32 to prevent ingress of sea water and egress of mud etc.
  • a spool 36 having a branch outlet or feedpipe 38 is located between the stationary telescoping part 26 and the fixed lower part of the marine riser.
  • the feedpipe 38 extends not only laterally but also upwardly to a manifold 40 which is situated at a point approximately equal to the upper end of the stationary telescoping section 26.
  • the height of the manifold 40 is determined by clamping it to a tensioned wire rope generally designated 42 which extends from the blow-out preventer housing 14 on the sea bed to the semi-submersible rig.
  • a constant tension is maintained in the wire rope 42 such as to maintain at least that section of the rope between the manifold 40 and the sea bed straight and taught.
  • the manifold 40 is thus maintained at a constant height above the sea bed irrespective of the level of the sea, which of course affects the height of the semi-submersible rig above the sea bed.
  • the vertical position of the manifold 40 is initially adjusted such that, irrespective of the heave position of the rig, the mud always flows through the feedpipe 38, in preference to flowing up the inner sleeve 28 of the riser 12 and along the outlet tube 22.
  • the differential head, indicated at H, between the level in the riser 12 and the level in the branch 38 constitutes the pressure required to cause flow in the branch outlet 38, and is a function of the pressure loss in the outlet 38 which in turn is a function of the flow properties of the mud and of its flow rate.
  • a flow meter 44 is located at the upper end of the feedpipe 38 where the latter enters the manifold 40, and by locating this below the level to which the mud will rise in that branch, so the flow meter will always be full.
  • a flexible hose or pipe 46 is connected to the manifold 40 for discharging mud, as will be described.
  • the manifold may form part of a collection tank from which mud can be pumped.
  • the important aspect is that flow through the meter 44 will be substantially constant provided the differential head, denoted by H in Figure 1, is maintained substantially constant during the drilling operation.
  • the precise flow will be determined by the actual value of the differential head and the flow characteristics of the mud in the branch 38.
  • a 20" differential head is equivalent to approximately 1200 litres per minute flow of mud through the branch 38 and the manifold 40.
  • the manifold 40 merely serves to convey returning mud to the larger diameter flexible pipe 46 from which it can be discharged to a treatment device such as a vibratory screening apparatus or shale shaker to begin the process of separating solids from the fluids, as a first step to recovering the drilling mud originally pumped into the drill at 20.
  • An important important additional advantage of the present invention is that the returning mud is fed to the treatment device at a constant flow rate, instead of the intermittent flow rate which occurs in conventional rigs during heave.
  • the shale shakers can be adjusted for higher efficiency operation at such constant flow.
  • the tensioned wire 42 is a convenient device for maintaining the manifold 40 at a fixed position; but it will be appreciated that if the branch tube 38 is made sufficiently rigid and self-supporting so as to carry the weight of the flow compensator assembly via the riser 12 (which is itself rigid and fixed to the seabed), the wire 42 can then be dispensed with.
  • the mud treatment apparatus (not shown) to which the mud is directed in the direction of arrow 50 is of course mounted on the semi-submersible rig and is therefore subject to heave as denoted by the arrow heads 52.
  • the heave movement of the treatment apparatus is effectively decoupled from the branch tube 38 and the flow meter 44 by means of the flexible tube 46 and the air venting, so as to eliminate back-pressure.
  • a flexible tube is shown linking the branch outlet to the manifold 40 and flow meter 44 and this is denoted by reference numeral 54.
  • the flexible tube is connected by a gland 56 to a short rigid branch pipe 58 containing a shut-off valve 60 which is preferably remotely controllable.
  • the discharge end of the flexible tube 46 communicates with a still larger diameter feed tube 62 for supplying the mud to the treatment apparatus such as a shale shaker (not shown).
  • a flow pattern such as shown in Figure 2 can be established in which there is always a decoupling air space in the upper left hand section of the U-tube formed by the flexible pipe 46 in the volume denoted by reference numeral 66.
  • Mud flowing through the flow meter 44 passes through the manifold 40 and runs down into the U-tube 46 and establishes a differential head K between the liquid level in the left hand branch and that in the right hand branch of the hanging flexible tube 46.
  • the pipe 46 is a 30 foot length of pipe or hose having an internal diameter of 4", the pipe
  • the pipe 46 is some 20 feet long of flexible material and has an internal diameter of 6" and the pipe 62 is a metal or other rigid material pipe of 9" internal diameter.
  • the movement of the inner sleeve 28 within the outer sleeve 26 will in fact generate a small heave related volume variation. This can largely be overcome by inverting the telescoping part so that the stationary member of the two telescoping sleeves has the smaller diameter.
  • Figures 3a-3c show the different positions of the flexible hose 46 during a heaving motion.
  • Figure 3a illustrates the situation in which the rig is at the upper end of the heave amplitude, Figure 3b at a mid position and Figure 3c at the lower end of the travel occasioned by the heave.
  • reference numeral 70 identifies the drill floor of the rig and reference numeral 72 the main deck of the rig. It is assumed that the treatment apparatus such as shale shakers is located on the main deck of the rig .
  • Other parts identified in Figures 3a-3c are identified by the same reference numerals as are employed in Figures 1 and 2.
  • warning means may be provided to indicate that such an excess has occurred since this could indicate a blockage in the branch line 54 or flow meter 44, manifold 40 or any of the other pipelines fed therefrom, or that there has been a sudden increase in pressure in the bore hole, and in any such situation a warning is required.
  • a warning may for example be a pressure or level sensor within the telescoping member 28 just below the outlet 22 or may be a flow sensing device located in outlet 22 or in any pipe communicating therewith.
  • Figure 4 shows a modification of the embodiment of Figure 1 to take account of the situation in which the mud treatment apparatus is at a higher level than the manifold 40.
  • the mud is received into an intermediate tank 80 from where it is pumped by a pump 82 through a pipe 84.
  • the mud is then fed in the direction of arrow 50 to the treatment apparatus (not shown) mounted at a height above the main deck 72 of the rig.
  • a level sensor and/or control system 86 is provided at the tank 80 to control the output of the pump 82, to avoid the tank either overflowing or being pumped dry.
  • the pump 82 may be a self-priming pump whose output is equal to or greater than the rate of circulation of the mud. In this case the complications of the sensor and control system 86 can be dispensed with, as the pump will then be self-regulating.
  • Figure 5 shows a further modification of the arrangement of Figure 4.
  • the pump 82 and tank 80 are mounted below the manifold 40 as an integral part thereof.
  • Other reference numerals are as in Figure 4.
  • the pump and tank could alternatively be mounted directly from the riser 12. This is shown in the embodiments of Figures 6 and 7.
  • the marine riser 12 again has a telescopic joint section with an inner slip joint sleeve 28 slidable in an outer sleeve 26, as in Figure 1.
  • an outer sheath 27 is additionally mounted around the sleeve 26 to provide an annulus 29 along which mud can flow.
  • An outlet is formed at the top of the sheath 27 which is connected to the flow meter 44. From the meter the mud flows by gravity past a vacuum breaker 90 over a weir 92 and along the flexible pipe 46 to the shale shaker (not shown) on the deck 72 of the rig.
  • FIG. 7 The arrangement in Figure 7 is similar to Figure .6 except that the mud is collected in a tank 80 below the weir 92. From the tank the mud is then fed by a pump 82, instead of by gravity, to the shale shaker (not shown).
  • the present invention is of particular application to slimhole drilling where there is sufficient height between the outlet and the mud treatment apparatus (such as shale shakers) , as is found on the Sedco 707 Rig in the North Sea.
  • the mud treatment apparatus such as shale shakers

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

Abstract

Plateforme de forage possédant une colonne montante marine (12) atteignant le fond de la mer et comprenant une évacuation de fluide sous forme d'une tuyauterie d'amenée (38) branchée sur un collecteur (49). Celui-ci est maintenu fixe par rapport au fond de la mer par un câble tendu (42) et fournit la boue fluide de retour par l'intermédiaire d'un tuyau flexible (46) à un tamis vibrant ou autre équipement de traitement des boues. Une autre solution consiste à récupérer la boue indirectement au collecteur par l'intermédiaire d'un réservoir de récupération (80) et d'une pompe (82). L'un des paramètres constamment surveillé est le débit de retour de la boue de forage, car toute variation soudaine de celui-ci peut correspondre, par exemple, à une admission de gaz ou de fluide dans le trou de forage. Malheureusement la variation de flux provoquée par la remontée et la descente de la section télescopique supérieure de la colonne montante marine, peut être telle qu'elle masque toute variation du débit et rend ainsi presque inutile le contrôle du débit instantané. Cet effet est fonction de l'amplitude et de la cadence de pilonnement et devient prédominant pour les faibles taux de pompage.
PCT/GB1992/001673 1991-09-13 1992-09-11 Procede et appareil pour aplanir les fluctuations de la boue de retour causees par l'effet de pilonnement d'une plateforme de forage WO1993006335A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9403480A GB2273948B (en) 1991-09-13 1992-09-11 Drilling platforms

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9119563.6 1991-09-13
GB919119563A GB9119563D0 (en) 1991-09-13 1991-09-13 Improvements in and relating to drilling platforms

Publications (1)

Publication Number Publication Date
WO1993006335A1 true WO1993006335A1 (fr) 1993-04-01

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PCT/GB1992/001673 WO1993006335A1 (fr) 1991-09-13 1992-09-11 Procede et appareil pour aplanir les fluctuations de la boue de retour causees par l'effet de pilonnement d'une plateforme de forage

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AU (1) AU2552792A (fr)
GB (2) GB9119563D0 (fr)
WO (1) WO1993006335A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000004269A3 (fr) * 1998-07-15 2000-04-20 Deep Vision Llc Systeme de forage de puits sous-marin permettant de reduire la pression dans le fond du trou
WO2003023181A1 (fr) * 2001-09-10 2003-03-20 Ocean Riser Systems As Ensemble et procede permettant de regler des pressions de fond de trou lors de forages sous-marins en eaux profondes
WO2005052307A1 (fr) * 2003-11-27 2005-06-09 Agr Subsea As Procede et dispositif destines a reguler la pression du fluide de forage
US8408297B2 (en) 2004-11-23 2013-04-02 Weatherford/Lamb, Inc. Remote operation of an oilfield device
US8844652B2 (en) 2007-10-23 2014-09-30 Weatherford/Lamb, Inc. Interlocking low profile rotating control device
US8863858B2 (en) 2010-04-16 2014-10-21 Weatherford/Lamb, Inc. System and method for managing heave pressure from a floating rig
US9004181B2 (en) 2007-10-23 2015-04-14 Weatherford/Lamb, Inc. Low profile rotating control device
US9175542B2 (en) 2010-06-28 2015-11-03 Weatherford/Lamb, Inc. Lubricating seal for use with a tubular
US9291012B2 (en) 2013-08-07 2016-03-22 Fabrication of Rig and Exploration Equipment, Inc. Plural input mud-collecting manifold
US9334711B2 (en) 2009-07-31 2016-05-10 Weatherford Technology Holdings, Llc System and method for cooling a rotating control device
US9359853B2 (en) 2009-01-15 2016-06-07 Weatherford Technology Holdings, Llc Acoustically controlled subsea latching and sealing system and method for an oilfield device
CN108412435A (zh) * 2018-03-27 2018-08-17 北京首创热力股份有限公司 一种用于大尺寸井眼硬岩钻井的多循环流道钻井系统及钻井工艺
CN112479531A (zh) * 2020-11-06 2021-03-12 浙江交工路桥建设有限公司 泥浆真空脱水管道系统及其脱水方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6460631B2 (en) 1999-08-26 2002-10-08 Baker Hughes Incorporated Drill bits with reduced exposure of cutters
NO321824B1 (no) * 2004-11-22 2006-07-10 Statoil Asa Pumpeinnretning
US7814997B2 (en) 2007-06-14 2010-10-19 Baker Hughes Incorporated Interchangeable bearing blocks for drill bits, and drill bits including same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811322A (en) * 1972-09-25 1974-05-21 Offshore Co Method and apparatus for monitoring return mud flow
US4099582A (en) * 1976-09-03 1978-07-11 Martin-Decker Company, A Division Of Gardner-Denver Drilling fluid compensation device
US4135841A (en) * 1978-02-06 1979-01-23 Regan Offshore International, Inc. Mud flow heave compensator
US4291772A (en) * 1980-03-25 1981-09-29 Standard Oil Company (Indiana) Drilling fluid bypass for marine riser

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9016272D0 (en) * 1990-07-25 1990-09-12 Shell Int Research Detecting outflow or inflow of fluid in a wellbore

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811322A (en) * 1972-09-25 1974-05-21 Offshore Co Method and apparatus for monitoring return mud flow
US4099582A (en) * 1976-09-03 1978-07-11 Martin-Decker Company, A Division Of Gardner-Denver Drilling fluid compensation device
US4135841A (en) * 1978-02-06 1979-01-23 Regan Offshore International, Inc. Mud flow heave compensator
US4291772A (en) * 1980-03-25 1981-09-29 Standard Oil Company (Indiana) Drilling fluid bypass for marine riser

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000004269A3 (fr) * 1998-07-15 2000-04-20 Deep Vision Llc Systeme de forage de puits sous-marin permettant de reduire la pression dans le fond du trou
GB2356657A (en) * 1998-07-15 2001-05-30 Deep Vision Llc Subsea wellbore drilling system for reducing bottom hole pressure
GB2356657B (en) * 1998-07-15 2003-03-19 Deep Vision Llc Subsea wellbore drilling system for reducing bottom hole pressure
WO2003023181A1 (fr) * 2001-09-10 2003-03-20 Ocean Riser Systems As Ensemble et procede permettant de regler des pressions de fond de trou lors de forages sous-marins en eaux profondes
US8322439B2 (en) 2001-09-10 2012-12-04 Ocean Riser Systems As Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
WO2005052307A1 (fr) * 2003-11-27 2005-06-09 Agr Subsea As Procede et dispositif destines a reguler la pression du fluide de forage
US7677329B2 (en) 2003-11-27 2010-03-16 Agr Subsea As Method and device for controlling drilling fluid pressure
US8701796B2 (en) 2004-11-23 2014-04-22 Weatherford/Lamb, Inc. System for drilling a borehole
US8408297B2 (en) 2004-11-23 2013-04-02 Weatherford/Lamb, Inc. Remote operation of an oilfield device
US8939235B2 (en) 2004-11-23 2015-01-27 Weatherford/Lamb, Inc. Rotating control device docking station
US9784073B2 (en) 2004-11-23 2017-10-10 Weatherford Technology Holdings, Llc Rotating control device docking station
US8844652B2 (en) 2007-10-23 2014-09-30 Weatherford/Lamb, Inc. Interlocking low profile rotating control device
US9004181B2 (en) 2007-10-23 2015-04-14 Weatherford/Lamb, Inc. Low profile rotating control device
US10087701B2 (en) 2007-10-23 2018-10-02 Weatherford Technology Holdings, Llc Low profile rotating control device
US9359853B2 (en) 2009-01-15 2016-06-07 Weatherford Technology Holdings, Llc Acoustically controlled subsea latching and sealing system and method for an oilfield device
US9334711B2 (en) 2009-07-31 2016-05-10 Weatherford Technology Holdings, Llc System and method for cooling a rotating control device
US8863858B2 (en) 2010-04-16 2014-10-21 Weatherford/Lamb, Inc. System and method for managing heave pressure from a floating rig
US9260927B2 (en) 2010-04-16 2016-02-16 Weatherford Technology Holdings, Llc System and method for managing heave pressure from a floating rig
US9175542B2 (en) 2010-06-28 2015-11-03 Weatherford/Lamb, Inc. Lubricating seal for use with a tubular
US9291012B2 (en) 2013-08-07 2016-03-22 Fabrication of Rig and Exploration Equipment, Inc. Plural input mud-collecting manifold
CN108412435A (zh) * 2018-03-27 2018-08-17 北京首创热力股份有限公司 一种用于大尺寸井眼硬岩钻井的多循环流道钻井系统及钻井工艺
CN108412435B (zh) * 2018-03-27 2024-03-19 北京首创热力股份有限公司 一种用于大尺寸井眼硬岩钻井的多循环流道钻井系统及钻井工艺
CN112479531A (zh) * 2020-11-06 2021-03-12 浙江交工路桥建设有限公司 泥浆真空脱水管道系统及其脱水方法

Also Published As

Publication number Publication date
GB9403480D0 (en) 1994-05-11
GB9119563D0 (en) 1991-10-23
GB2273948A (en) 1994-07-06
GB2273948B (en) 1995-08-09
AU2552792A (en) 1993-04-27

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