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WO2003033952A1 - Procede et appareil d'installation de tuyau - Google Patents

Procede et appareil d'installation de tuyau Download PDF

Info

Publication number
WO2003033952A1
WO2003033952A1 PCT/AU2002/001387 AU0201387W WO03033952A1 WO 2003033952 A1 WO2003033952 A1 WO 2003033952A1 AU 0201387 W AU0201387 W AU 0201387W WO 03033952 A1 WO03033952 A1 WO 03033952A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
hole
fluid
land
water
Prior art date
Application number
PCT/AU2002/001387
Other languages
English (en)
Inventor
William Dee Cherrington
Original Assignee
William Dee Cherrington
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
Priority claimed from AUPR8276A external-priority patent/AUPR827601A0/en
Priority claimed from AU2002951269A external-priority patent/AU2002951269A0/en
Application filed by William Dee Cherrington filed Critical William Dee Cherrington
Publication of WO2003033952A1 publication Critical patent/WO2003033952A1/fr

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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/043—Directional drilling for underwater installations
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/046—Directional drilling horizontal drilling

Definitions

  • the present invention relates to a method and apparatus for installing a pipe.
  • the invention relates to a method and apparatus for installing a pipe suitable as a fluid or fluid-solid mixture carrier pipe extending between a land-based location and an underwater location and will primarily be described with reference to this context. It is also to be understood that the invention has broad use in pipeline installation applications for all manner of pipeline types, in order to provide linkage between a land-based facility and an underwater facility, such as a communication cable pipeline.
  • Pipeline apparatus and methods of installing pipelines for conveying fluid or fluid-solid mixtures and for retaining communication cables (eg optic fibre cabling) and the like are known in the art. Pipelines are sometimes required to pass under a body of water such as a river, canal or lake,' rather than merely being placed along the floor of such a body of water. A method known as horizontal directional drilling (HDD) has been developed to achieve this .
  • HDD horizontal directional drilling
  • a small diameter pilot hole is drilled under the body of water using a steering tool.
  • the entry point for the drilling tool is on land on one side of the body of water.
  • the reamer rotates, thus enlarging the hole.
  • the reamer is then returned to the hole exit position and a pipeline end is then attached to it.
  • the pipeline (with or without the reamer) is then pulled back through the hole from the exit position to the entry position thereby slidably installing the pipeline in the drilled and reamed hole .
  • the reaming step is not required and it is the steering and drilling device which is pulled back through the hole from the exit position to the entry position dragging the pipeline with it in order to slidably install that pipeline in the hole.
  • Pipeline installation machines are also known, for example shown in US 5,375,945.
  • the present invention provides a method for installing a pipe including the steps of: - forming an elongate hole that extends from a land- based location to a location in an adjacent body of water; and subsequently installing the pipe in the hole by slidably inserting thereinto the pipe or a plurality of joinable sections of pipe, wherein the pipe is inserted in the hole from the land- based location.
  • the present invention provides a method for pipeline installation where the exit position is not on land, but on a river, lake or ocean floor.
  • a submarine cable conduit may be required to be installed from a land- based location to an undersea communication cable conduit
  • a submarine oil or gas product pipeline may be required to be installed from a land-based storage or transportation facility to a pipeline joined to an offshore rig.
  • it is unwise to run the conduit or pipeline off the land, down a beach or cliff face and directly onto the ocean floor because the ocean entry portion of such a pipeline would be subject to damage from tidal movements and waves, and great wear from the action of rocks and sand etc .
  • the invention can provide a simpler, safer and more convenient method of installing a subterranean pipe of a specific standard to extend from land to water and involving minimal marine construction activity.
  • the present invention provides a method for installing such conduits or pipes from a land-based location to an undersea location, for example, to a location some 500-1500m offshore and to a depth of 10-50m below the sea floor.
  • the difficulty with the known prior art method is that divers and barges loaded with heavy machinery are required to enable the exchange of equipment for the reaming step and to float or tow the pipeline into position at the marine (exit) end of the drill hole.
  • the installation of the pipe into the hole is conducted from the land, thus minimising the need for river, lake or ocean drilling barges or other water-based componentry used in the prior art method.
  • the invention allows for the installation of a single carrier pipe for the conveying of fluids (such as liquid or gas) or fluid-solid mixtures whether the pipe be in one piece or made from a plurality of joined pipe sections .
  • fluids such as liquid or gas
  • fluid-solid mixtures whether the pipe be in one piece or made from a plurality of joined pipe sections .
  • the land-based nature of the installation of the pipe allows more convenient joining of the pipe sections prior to installation into the hole.
  • the hole is formed by drilling from the land-based location.
  • the hole is reamed to increase its diameter prior to installation of the pipe .
  • the hole can be reamed (or widened) from the land-based opening to the water body opening by using known forward-reaming techniques.
  • the hole may be only partially reamed from the land-based opening, terminating before exiting the water body opening. In some cases the hole may not require reaming at all before the pipe is slidably installed thereinto .
  • the pipe or pipe section is inserted by a pipe pushing apparatus, which has a land-based location.
  • a pipe pushing apparatus which has a land-based location.
  • the pipe (or joined sections of pipe) is pushed through the hole until it exits the hole into the body of water.
  • the pipe is pulled further into the body of water so that it can eventually be joined to a further underwater pipeline located on the river, lake or ocean floor.
  • the pipe may not be pushed through the water body opening, and in fact may be pulled through this opening and out into the body of water.
  • joints between adjacent sections are formed prior to insertion of the resulting pipe into the land-based opening of the hole.
  • the joint formation includes welding.
  • the pipeline welding will need to be of a pipeline standard which requires X-radiation integrity checks as well as leakage checks, fatigue assessment etc. Such checking can be done conveniently at the land-based location prior to slidable insertion of the pipe into the land-based opening.
  • the present invention provides an apparatus for installing a pipe including: a device for forming an elongate hole that extends from a land-based location to a location in an adjacent body of water; and a pipe installation device for installing the pipe in the hole by slidable insertion thereinto of the pipe or a plurality of joinable sections of pipe from the land-based location.
  • the device for forming the hole is a drilling tool.
  • the pipe installation device is a pipe pushing means having a land-based location.
  • the pipe pushing means includes a grip for attaching to the peripheral surface of the pipe or pipe sections so as to enable insertion of said pipe or pipe sections into the hole.
  • a pipe pulling means is used to pull the pipe (or joined pipe sections) into the body of water once the said pipe has exited or is adjacent the exit of the hole.
  • a joint-forming device is used to form joints between adjacent sections prior to insertion of the resulting pipe into the land-based opening of the hole.
  • the joint-forming device is a welding tool.
  • the installed pipe is of a pipeline standard suitable for the in use transmission of fluid and solid-fluid mixtures therethrough, and will cope with the passage of pressurised fluids etc without leaking.
  • the installed pipe can be a carrier pipe suitable for encasing a further pipeline of a standard suitable for the in use transmission of fluid and solid- fluid mixtures therethrough, and the carrier pipe is of a less rigorous materials specification.
  • the present invention provides an apparatus for mounting to an end of a pipe and adapted for releasing fluid from the interior of the pipe into a pre- drilled hole into which the pipe is being inserted, the apparatus being removeable for replacement with a plug so that the pipe is then able to be pressurised.
  • the apparatus is a nozzle incorporating a one-way valve so that solid, liquid or gaseous material located outside the pipe is prevented from entering the interior of the pipe in use .
  • the nozzle is detachable from an outlet in a mounting plate mountable at the end of the pipe.
  • the nozzle is positioned in a housing mountable to the mounting plate to define a chamber around the nozzle at the end of the pipe, the housing having at least one fluid exit nozzle therein for releasing fluid from the chamber in use .
  • the housing has an opening closable with a closure, the removal of which enables the nozzle to be removed from the housing and the plug to be inserted therein and attached to the outlet in place of the nozzle.
  • Such an apparatus has a dual advantage.
  • a fluid is passed through the pipe and out of the fluid release adaptation to facilitate the movement of the pipe in the hole.
  • a fluid can be a jet of water or other liquid or a high viscosity fluid-like material such as a bentonite slurry suspension which can suspend drilling debris in the hole (such as small rocks or other particulates) in order that such material does not deposit in the bottom of the hole under the influence of gravity and block the ready sliding movement of the pipe.
  • the present invention provides a method for facilitating the introduction of a pipe into a pre-formed hole that extends from a first land-based location to either a second land-based location or a location in or adjacent to a body of water, including the step of passing a fluid through the pipe to exit from a leading end thereof whilst the pipe is being inserted into the hole.
  • the hole is pre-formed by drilling such that drilling debris remains in the hole, and the fluid is a high viscosity solid-liquid mixture capable of suspending the drilling debris therein when ejected from the pipe.
  • the present invention provides an apparatus for facilitating the introduction of a pipe into a pre-formed hole that extends from a first land-based location to either a second land-based location or a location in or adjacent to a body of water, including a fluid ejection device for releasing a fluid from a leading end of the pipe whilst the pipe is being inserted into the hole, the fluid ejection device arranged to prevent solid, liquid or optionally gaseous material located outside the pipe from entering the interior of the pipe in use.
  • a fluid is passed through the pipe and out of the fluid ejection device to facilitate the movement of the pipe in the hole.
  • a fluid can be a jet of water or other liquid or a high viscosity fluid-like material such as a bentonite slurry suspension which can suspend drilling debris in the hole in order that such material does not deposit in the bottom of the hole under the influence of gravity and block the ready sliding movement of the pipe.
  • the fluid injection device only allows the flow of fluid out of the p p whilst in the hole so that the drilling debris does not enter and block the pipe itself during its insertion.
  • the fluid ejection device is a nozzle as defined in the third aspect.
  • Figure 1 shows a side schematic view of one embodiment of an elongate hole formed from a land-based location to an opening in or at a body of water when a pipe is slidably inserted into the hole in accordance with the invention.
  • Figure 2 shows a side view of one embodiment of an apparatus used for injecting fluid into a hole from a pipe located in the hole in accordance with the invention.
  • Figure 3 shows a side view of the embodiment shown in Figure 2 when the fluid injection nozzle is replaced by a plug.
  • a pipe 10 is shown extending from a land-based location 12 to a location on the floor 14 an adjacent body of water 16.
  • the process of installing the pipe 10 firstly involves rotatably drilling an elongate hole 20 that extends from the land-based location 12 to the floor 14 of the water body 16.
  • a drilling tool is utilised to bore through rock strata and earth at an angle, where the entry angle A and the set-back B of the drill hole is of sufficient distance to ensure that the hole 20 bored out will have a typical 10 metre clearance below the floor 14 of the water body 16, and perhaps as much as 50 metres.
  • the hole 20 is advanced along a pre-determined profile path until the drill bit approaches the floor 14 of the water body 16. This may occur anywhere from 500-1500m offshore in an ocean-drilling situation.
  • a fine clay substance such as bentonite is used as a high viscosity drilling mud to capture and suspend cuttings from the borehole (to prevent settling) .
  • This drilling mud is extracted up the borehole and the cuttings are separated. The drilling mud may then be recycled via pipeline 19 into the drilling process.
  • the process further involves the use of a pipe installation device 22 for installing the pipe 10 in the hole 20 by slidable insertion of the pipe 10 or a plurality of joinable sections of pipe into the hole 20.
  • the land-based device 22 pushes (forward thrusts) the pipe 10 into a pre-formed hole 20 by gripping the peripheral surface of the pipe or pipe sections so as to enable insertion into the hole 20.
  • a joint-forming device typically in the form of a welding station is used to form joins between adjacent sections.
  • the welds can be examined so that the pipe is of a standard suitable for the in use transmission of fluid and solid- fluid mixtures therethrough, and will cope with the passage of pressurised fluids etc without leaking.
  • the land-based nature of the installation of the pipe allows both more convenient joining and checking of the joins between pipe sections prior to installation of the assembled pipe into the hole.
  • the installed pipe can merely be a carrier pipe suitable for encasing a further pipeline of a welded standard suitable for the in use transmission of fluid and solid-fluid mixtures therethrough.
  • a carrier pipe can be of a less rigorous materials specification such as softer plastics, and does not require pressure rating.
  • the pipe 10 Once the pipe 10 is positioned in the hole 20 it can be pulled into the body of water 16 if the pipe 10 has exited or is adjacent the exit 25 of the hole 20. If the hole 20 has been made to penetrate the floor 14 of the body of water 16, typically compressed air is pumped through the drill hole to locate and verify the exit location of the hole for divers in attendance. In some situations it may be preferable for the drill hole to be extended very near to breaking through into the floor of the body of water followed by the step of finally breaking through the floor so as to form the opening. In such a situation this second breakthrough ( step can be done by divers operating at the body of water side of the hole, or from the land side by the use of a further cutting tool inserted into the hole or even attached to the end of the inserted pipe.
  • this second breakthrough step can be done by divers operating at the body of water side of the hole, or from the land side by the use of a further cutting tool inserted into the hole or even attached to the end of the inserted pipe.
  • the hole can be reamed (widened) to increase its diameter prior to installation of the pipe.
  • the hole can be reamed from the land-based opening to the water body opening by using known forward-reaming techniques.
  • the hole may be only partially reamed from the land-based opening, terminating before exiting the water body opening. In some cases the hole may not require reaming at all before the pipe is slidably installed thereinto.
  • the present invention provides an apparatus 100 for mounting to an end of a pipe 10 and adapted for releasing fluid such as drilling mud from the interior 102 of the pipe 10.
  • the end of the pipe 104 has a mounting plate in the form of a high pressure cap 106 which has a central orifice 108 with a detachable high pressure fitting seated thereat.
  • the high pressure fitting is in the form of a threaded female socket portion 110 for receiving a threadably mated male nozzle portion 112, the nozzle 112 incorporating a one-way valve so that solid or liquid material located outside the pipe 10 is prevented from entering the interior 102 of the pipe 10 in use.
  • the one way valve provides a net flow of drilling mud from the interior 102 of the pipe through the nozzle 112.
  • the nozzle 112 is positioned in a housing in the form of a jet head assembly 114 mounted to the high pressure cap 106 to define a chamber 116 around the nozzle at the end of the pipe.
  • the jet head assembly 114 has four high pressure fluid exit nozzles 118 directed upstream from a face 120 of the jet head assembly 114 and pipe 10, the four nozzles 118 for releasing fluid from the chamber 116 in use.
  • the jet head assembly 114 has an opening with a closure in the form of a pull eye 122 which is welded to a lateral flange 124, the flange 124 being held in position by a number of circumferential bolts 126 which are received into the jet head assembly 114.
  • the unbolting of the flange 124 and pull eye 122 from the jet head assembly 114 enables a diver to reach into the jet head assembly 114 and unscrew the nozzle 110/112 from the high pressure test cap 106 and to insert a plug 128 to into the central orifice
  • a fluid is passed through the pipe 10 and out of the high pressure cap 106 at the leading end of the pipe 10 to facilitate the movement of the pipe 10 in the hole 20.
  • Such a fluid can be a jet of water or other liquid or a high viscosity fluid-like material such as a bentonite slurry suspension which can suspend drilling debris in the hole 20 in order that such material does not deposit in the bottom of the hole 20 under the influence of gravity and block the ready sliding movement of the pipe 10.
  • a diver can simply remove the high pressure fitting nozzle 110/112 and replace it with the plug 128 so that the pipe 10 is then sealed and can be pressure tested underwater for weld integrity, fluid leakage and the like before commencement of use of the pipe 10 for its designated purpose.
  • Such a step is used to detect any damage that may have occurred to the pipe 10 during installation.
  • the hole, orifice or other fluid ejection device located at the leading end of the pipe can be of any shape or orientation provided that the device is arranged to prevent solid or liquid material located outside the pipe from entering the interior of the pipe in use either under hydrostatic pressure or by being directed therein by movement of the pipe.
  • the invention can provide a simpler, safer and more convenient method of installing a subterranean pipe of a specific standard to extend from land to water and involving minimal marine construction activity at the marine (exit) end of the drill hole.
  • the materials of construction of the pipe can comprise any suitable materials which can be shaped, formed and fitted in the manner so described, such as appropriate metal or metal alloys for strength and even metal pipes with protective exterior coatings for corrosion resistance .

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Selon l'invention, un tuyau (10) s'étend à partir d'un emplacement terrestre (12) jusqu'à un emplacement situé sur le fond (14) d'un corps d'eau (16) à proximité. Le procédé d'installation de tuyau (10) selon l'invention consiste d'abord à forer de manière rotative un trou allongé (20) qui s'étend à partir dudit emplacement terrestre (12) jusqu'au fond (14) dudit corps d'eau (16). Le trou (20) suit un trajet à profil déterminé, jusqu'à ce que le trépan approche du fond (14) du corps d'eau (16). Après le forage, le procédé consiste à utiliser un dispositif d'installation de tuyau (22) servant à installer le tuyau (10) dans le trou (20), par insertion coulissante du tuyau (10) ou d'une pluralité de parties raccordables de tuyau dans le trou (20). Le dispositif terrestre (22) pousse (enfonce vers l'avant) le tuyau (10) dans un trou préformé (20), par préhension de la surface périphérique du tuyau ou des parties de tuyau, de sorte à permettre l'insertion du tuyau dans le trou (20).
PCT/AU2002/001387 2001-10-15 2002-10-15 Procede et appareil d'installation de tuyau WO2003033952A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPR8276 2001-10-15
AUPR8276A AUPR827601A0 (en) 2001-10-15 2001-10-15 Method and apparatus for installing a pipe
AU2002951269A AU2002951269A0 (en) 2002-09-06 2002-09-06 Method and apparatus for installing a pipe
AU2002951269 2002-09-06

Publications (1)

Publication Number Publication Date
WO2003033952A1 true WO2003033952A1 (fr) 2003-04-24

Family

ID=25646818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2002/001387 WO2003033952A1 (fr) 2001-10-15 2002-10-15 Procede et appareil d'installation de tuyau

Country Status (1)

Country Link
WO (1) WO2003033952A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7959702B2 (en) 2007-02-02 2011-06-14 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US8545589B2 (en) 2007-06-26 2013-10-01 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US8628273B2 (en) 2011-07-29 2014-01-14 Martin Cherrington Method and apparatus for forcing a pipeline into or out of a borehole
US8998537B2 (en) 2011-07-29 2015-04-07 Martin Cherrington Method and portable apparatus for forcing a pipeline into or out of a borehole
US9084957B2 (en) 2008-07-25 2015-07-21 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US9108394B2 (en) 2008-08-06 2015-08-18 Donaldson Company, Inc. Method of making a Z-media having flute closures
US9808752B2 (en) 2008-02-04 2017-11-07 Donaldson Company, Inc. Method and apparatus for forming fluted filtration media
US10058812B2 (en) 2010-01-25 2018-08-28 Donaldson Company, Inc. Pleated filtration media having tapered flutes
US10363513B2 (en) 2009-08-03 2019-07-30 Donaldson Company, Inc. Method and apparatus for forming fluted filtration media having tapered flutes

Citations (7)

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Publication number Priority date Publication date Assignee Title
US4117895A (en) * 1977-03-30 1978-10-03 Smith International, Inc. Apparatus and method for enlarging underground arcuate bore holes
US4319648A (en) * 1979-09-24 1982-03-16 Reading & Bates Construction Co. Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein
US4453603A (en) * 1980-12-09 1984-06-12 Voss Development Corporation Apparatus and method for selected path drilling
US4679637A (en) * 1985-05-14 1987-07-14 Cherrington Martin D Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein
US4700788A (en) * 1985-05-06 1987-10-20 Shell Oil Company Directional drilling pipelay
US5288173A (en) * 1991-07-05 1994-02-22 Terra Ag Fuer Tiefbautechnik Method for the directional control of an earth boring device as well as apparatus for making earth bores
US5375945A (en) * 1993-02-12 1994-12-27 Cherrington Corporation Method and apparatus for thrusting a pipeline into bore hole

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117895A (en) * 1977-03-30 1978-10-03 Smith International, Inc. Apparatus and method for enlarging underground arcuate bore holes
US4319648A (en) * 1979-09-24 1982-03-16 Reading & Bates Construction Co. Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein
US4453603A (en) * 1980-12-09 1984-06-12 Voss Development Corporation Apparatus and method for selected path drilling
US4700788A (en) * 1985-05-06 1987-10-20 Shell Oil Company Directional drilling pipelay
US4679637A (en) * 1985-05-14 1987-07-14 Cherrington Martin D Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein
US5288173A (en) * 1991-07-05 1994-02-22 Terra Ag Fuer Tiefbautechnik Method for the directional control of an earth boring device as well as apparatus for making earth bores
US5375945A (en) * 1993-02-12 1994-12-27 Cherrington Corporation Method and apparatus for thrusting a pipeline into bore hole

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9517430B2 (en) 2007-02-02 2016-12-13 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US8361183B2 (en) 2007-02-02 2013-01-29 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US10786774B2 (en) 2007-02-02 2020-09-29 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US11612845B2 (en) 2007-02-02 2023-03-28 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US8734557B2 (en) 2007-02-02 2014-05-27 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US7959702B2 (en) 2007-02-02 2011-06-14 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US12017177B2 (en) 2007-06-26 2024-06-25 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US10525397B2 (en) 2007-06-26 2020-01-07 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US9433884B2 (en) 2007-06-26 2016-09-06 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US11298645B2 (en) 2007-06-26 2022-04-12 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US8545589B2 (en) 2007-06-26 2013-10-01 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US9808752B2 (en) 2008-02-04 2017-11-07 Donaldson Company, Inc. Method and apparatus for forming fluted filtration media
US12048888B2 (en) 2008-07-25 2024-07-30 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US9855519B2 (en) 2008-07-25 2018-01-02 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US10946313B2 (en) 2008-07-25 2021-03-16 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US9084957B2 (en) 2008-07-25 2015-07-21 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US9108394B2 (en) 2008-08-06 2015-08-18 Donaldson Company, Inc. Method of making a Z-media having flute closures
US10363513B2 (en) 2009-08-03 2019-07-30 Donaldson Company, Inc. Method and apparatus for forming fluted filtration media having tapered flutes
US10058812B2 (en) 2010-01-25 2018-08-28 Donaldson Company, Inc. Pleated filtration media having tapered flutes
US11413563B2 (en) 2010-01-25 2022-08-16 Donaldson Company, Inc. Pleated filtration media having tapered flutes
US8998537B2 (en) 2011-07-29 2015-04-07 Martin Cherrington Method and portable apparatus for forcing a pipeline into or out of a borehole
US9534705B2 (en) 2011-07-29 2017-01-03 Martin D. Cherrington Method and portable apparatus for thrusting a pipe into and out of an earthen formation
US8628273B2 (en) 2011-07-29 2014-01-14 Martin Cherrington Method and apparatus for forcing a pipeline into or out of a borehole

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