US3831443A - Apparatus for intercoupling well tool sections having electrical and fluid lines - Google Patents

Apparatus for intercoupling well tool sections having electrical and fluid lines Download PDF

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Publication number
US3831443A
US3831443A US00324936A US32493673A US3831443A US 3831443 A US3831443 A US 3831443A US 00324936 A US00324936 A US 00324936A US 32493673 A US32493673 A US 32493673A US 3831443 A US3831443 A US 3831443A
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Prior art keywords
end portions
conduit
tool
mating
valve
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Expired - Lifetime
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US00324936A
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English (en)
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J Planche
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Schlumberger Technology Corp
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Schlumberger Technology Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
    • E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
    • G01V11/002—Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant
    • G01V11/005—Devices for positioning logging sondes with respect to the borehole wall
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/87925—Separable flow path section, valve or closure in each
    • Y10T137/87965—Valve- or closure-operated by coupling motion

Definitions

  • the coupling means for each mating end further include valve means cooperatively arranged to close upon separation of the body sections for trapping hydraulic fluid in each portion of the system and to open upon connection of the body sections for intercommunicating the several portions of the hydraulic system once the body of the well tool is assembled.
  • FIG. 1 shows a typical well tool comprised of a plurality of separable body sections which are joined together by a preferred embodiment of new and improved coupling means incorporating the principles of the present invention
  • FIGS. 2A and 2B are successive cross-sectional views somewhat-schematically depicting two of the body sections illustrated in FIG. 1;
  • FIGS. 3 and 4 are enlarged views of a preferred embodiment of the present invention illustrating the operation of the new and improved coupling means as two mating ends of two body sections are coupled to one another.
  • a well tool 10 is shown suspended in a well bore, such as a borehole 11, from a typical multiconductor logging cable 12 which is spooled in the usual manner on a winch (not shown) at the earths surface and connected to typical surface equipment (not shown) adapted for supplying power to the tool and recording various measurements from the tool.
  • a winch not shown
  • typical surface equipment not shown
  • the present invention has utility with any multi-sectional wellcompletion tool having electrical and hydraulic lines which must be interconnected when the tool is assembled.
  • the well tool 10 is preferably a logging tool such as that shown in a copending application Ser. No. 256,075 filed in the United States Patent Office on May 23, 1972.
  • the logging tool 10 is comprised of an upper body section 13 and a plurality of tandemlyarranged separable body sections 14-18 which are respectively joined at their mating ends by new and improved coupling means, as at 19, incorporating the principles of the present invention.
  • a typical end cap 20 is provided for closing the lower end of the lowermost body 18.
  • the body sections 13 and 16 are employed for housing various electrical components as typically required for operation of the tool and obtaining the desired fonnation measurements.
  • a typical acoustic transducer 21 is mounted in the upper end of the body 17 and cooperatively arranged for directing acoustic energy outwardly into the earth formations surrounding the borehole 11.
  • a pair of typical acoustic transducers 22 and 23 are mounted at spaced intervals on an extendible wall-engaging pad member 24 having its upper end pivotally coupled, as by a link or arm 25, to the body 17.
  • the transducers 21-23 could also respectively be a radioactive source and a pair of gamma-ray detectors.
  • means such as an arcuate spring 26 cooperatively coupled to the body 17 and the mid-portion of the pad member, are provided for normally urging the forward face of the pad outwardly into contact with the wall of the borehole 11.
  • a piston actuator 27 is cooperatively arranged on the body 17 and coupled to one end of a crank arm 28 which is pivotally mounted in an upright position on the body 17 and has its other end pivotally coupled to the mid-portion of the pad 24. In this manner, when hydraulic pressure is applied to the piston actuator 27, the pad 24 is moved laterally inwardly against the outwardly-applied force of the spring 26 to retract the pad against the forward side of the tool 10.
  • the pad 24 Since the pad 24 must be maintained in sliding contact with one wall of the borehole 11, it is preferred to shift the entire tool toward that wall of the borehole to minimize the distance which the pad 24 must move when it is extended. On the other hand, it is preferred that the forward face of the tool 10 remain spatially disposed from the wall of the borehole 11 a sufficient distance to allow the transducer pad 24 to pivot about the outer end of the crank arm 28 as may be required for the pad to maintain contact with an irregular borehole surface as the logging tool is moved up the borehole.
  • selectivelyoperable eccentering means 29 and 30 are arranged in the bodies and 18 for cooperatively positioning the upper and lower ends of the tool as required for a given situation.
  • the tool-eccentering means 29 and 30 respectively include selectivelyextendible elongated arms 31 and 32 which are normally urged outwardly by arcuate springs 33 and 34 from the rear side of the tool 10 so as to maintain the outer ends of these arms in sliding contact with the wall of the borehole 11 diametrically opposite from the borehole wall being contacted by the transducer pad 24.
  • the tool-eccentering means 29 and 30 also respectively include selectively-extendible wheels or rollers 35 and 35 which are journalled in upright positions on the outer ends of pivotally-mounted crank arms 37 and 38 and normally maintained in rolling engagement with the wall of the borehole 11 above and below the pad 24 so as to allow the pad sufficient clearance to tilt as required to maintain contact with the borehole wall.
  • Piston actuators 39 and 40 are respectively mounted in the tool body sections 15 and 18 and cooperatively coupled to the arms 31 and 32 and the cranks 37 and 38 for selectively retracting these members in a manner which will subsequently be described.
  • selectively-operable hydraulic pressure-generating means 41 are arranged in the tool section 14 and cooperatively arranged to supply a pressured hydraulic fluid to the several piston actuators.
  • the pressure-generating means 41 include a suitable hydraulic pump 42 which is driven by an electrical motor 43 and coupled by a fluid conduit 44 to the several piston actuators 27, 39 and 40.
  • FIGS. 2A and 2B enlarged, somewhat-schematic views are shown of preferred embodiments of the upper eccentering means 29 in the body 15 and the pressure-generating means 41 in the body 14 as well as a preferred embodiment of one of the new and improved coupling means 19 of the present invention.
  • the body 14 is provided with upper and lower end walls or bulkheads 45 and 46 to enclose the interior of the body section.
  • the interior of the body 14 is further divided by spaced partitions or transverse walls 47 and 48 which are joined by an axially aligned tubular member 49 for defining an annular piston chamber 50 around the tubular member between these transverse partitions and providing an isolated conduit for a multi-conductor cable 51 extending between typical electrical feedthrough or bulkhead connectors 52 and 53 respectively mounted in the upper and lower end walls 45 and 46 for mating connection with similarly-arranged connectors in adjacent tool bodies as at 13 and 15.
  • the pump 42 and the motor 43 are conveniently arranged in the interior space 54 defined within the body 15 between the walls 46 and 48 and this enclosed space is filled with a suitable hydraulic fluid for supplying the pump.
  • a suitable hydraulic fluid for supplying the pump.
  • the oil-filled reservoir 54 of the pressure-generating means 41 is communicated by way of the cable conduit 49 and a lateral port 55 therein to the oil-filled lower portion of the piston chamber 50.
  • an annular piston 56 is sealingly disposed within the chamber for movement between an outstanding shoulder 57 on the cable conduit 49 above the port 55 and a lateral port 58 in the sidewall of the body 14 communicating the space above the piston with the borehole fluids.
  • the pressure-generating means 41 are further arranged with the lower portion of the chamber 50 defining a compensation chamber 59 and the two chambers are isolated from one another by a second annular piston 60 which is normally urged downwardly by one or more stout springs 61 mounted around the cable conduit 49 between the piston and the shoulder 57.
  • a conduit 62 is coupled between the output of the pump 42 and the oil-filled compensation chamber 59. Accordingly, as oil in the output hydraulic conduit 44 expands and contracts in response to changes in borehole temperatures, the compensating piston 60 will move as required to vary the volume in the compensation chamber 59.
  • the oil in the piston chamber 50 above the compensating piston 60 is maintained at bydrostatic pressure, the oil in the compensation chamber 59 will also remain at least at hydrostatic pressure.
  • the compensating piston 60 will primarily move only as required to accommodate volumetric changes in the oil which may be caused by temperature variations.
  • a bypass valve such as a normally-closed solenoid-actuated valve 63
  • a bypass valve for selectively returning oil directly to the reservoir from that portion of the hydraulic output conduit 44 within the body 14.
  • the bypass valve 63 will be left closed.
  • the solenoid valve 63 by simply actuating the solenoid valve 63, the pressure of oil in the hydraulic output conduit 44 will be reduced to the pressure level of the oil in the reservoir 54.
  • a check valve 64 and a pressure-relief valve 65 are arranged in that portion of the output conduit 44 within the body 14.
  • the body is arranged as a longitudinally-spaced pair of upper and lower cylindrical enclosures 66 and 67 which are joined by a pair of upright elongated members 68 and 69 separated as required to accommodate the movements of the eccentering arm 31 and the wall-engaging roller 35.
  • the upper and lower enclosure members 66 and 67 are fluidly coupled by an axially-disposed tubular member 70 so that all three members comprise an extension of that portion of the hydraulic output conduit 44 extending through the body 15 between the upper and lower end walls 71 and 72 of the body.
  • tubular member 70 further serves as a conduit for carrying a multi-conductor cable 73 which is connected between typical electrical connectors 74 and 75 respectively mounted in the upper and lower end walls 71 and 72.
  • eccentering means 29 (as well as the piston actuator 39 is arranged in the form of a single piston cylinder 76 which is mounted in an upright position between the side members 68 and 69 and carries a pair of opposed pistons 77 and 78.
  • a branch conduit 79 couples the oil-filled tubular member 70 to the space in the cylinder 76 between the two opposed pistons 77 and 78 so that, upon an increase of hydraulic pressure in the hydraulic output conduit 44, the pistons will move apart.
  • roller is retracted upon an increase of hydraulic pressure in the cylinder 76, by cooperatively coupling the lower opposed piston 78 to the crank 37. It should be noted at this point that it is preferred that the roller 35 (as well as the lower roller 36) remains fully extended even though the eccentering arm 31 must partially retract to accommodate the passage of the logging tool 10 through a reduced-diameter well bore.
  • a stout spring 82 is arranged in the piston cylinder 76 for normally urging the piston 78 upwardly.
  • the bodies 14 and 15 are tandemly coupled by the new and improved coupling means 19 of the present invention.
  • the adjoining ends of the body sections 14 and 15 are cooperatively arranged so that the lower end of the body 14 is, for example, counterbored, as at 83, and adapted to receive the reduced-diameter upper end portion 84 of the body 15.
  • An externally-threaded collar 85 is rotatably mounted between a shoulder 86 and a split-ring 87 spaced on the upper end portion 84 of the body 15 and adapted for threading reception within complementary threads 88 formed around the counterbore 83 in the lower end of the body 14 to mechanically secure the two bodies in a tandem relationship.
  • FIGS. 2A and 2B that by fluidly coupling the tubular member 70 and the two'enclosures 66 and 67 in the body 15 to the tubular conduit in the reservoir 54, the hydraulic output conduit44 will be extended from the body 14 and through the body 15 to its lower end for similar extension to the other bodies 16-18.
  • the upper end wall 71 of the body 15 is, for example, axially counterbored, as at 90, for receiving a complementally-shaped axially-disposed tubular projection 91 depending from the lower end wall 46 of the body 14.
  • Appropriatelyarranged fluid seals, as at 92, are provided for sealing the mating elements in relation to one another.
  • valve means as at 93 and 94, are respectively mounted in the depending probe 46 and its mating counterbore and cooperatively arranged for opening in response to intercoupling of the two bodies 14 and 15.
  • the valve means 93 are comprised of a ball valve member 95 which is mounted within the tubular probe 91 and normally urged downwardly by means, such as a spring 96, into seating engagement with an annular valve seat 97 formed within the lower portion of the probe member.
  • valve means 94 include a ball valve member 98 arranged within the counterbore 90 and biased upwardly by a spring 99 into normal seating engagement with an annular valve seat 100 formed around the upper end of the counterbore 90.
  • the new and improved coupling means 19 further include valveactuating means 101 cooperatively arranged to leave the valve members seated until the bodies approach their respective fully-coupled positions.
  • the valve-actuating means 101 include a depending thrust rod 102 which is substantially smaller than the internal bore 103 of the probe member 91 and is coaxially secured therein, as by a spider 104, so as to not materially block fluid communication through the probe.
  • the fixed thrust rod 102 is sized so as to pass through the valve seat 100 and contact the upper end of the ball member 98 to progressively unseat it as the coupling ring 85 draws the bodies 14 and 15 into their final fullycoupled positions.
  • valve-actuating means 101 further include a movable thrust rod 105 which is slidably mounted within the spider 104 and projected upwardly in coincidental alignment with the valve seat 97.
  • the overall length of the movable thrust rod 105 is selectively arranged so that as the bodies 14 and 15 are brought together by the coupling ring 85, the lower end of the thrust rod will be contacted by an upwardlyfacing shoulder 106 in the counterbore 90 above the valve seat 100.
  • the thrust rod 105 is shifted upwardly, its upper reduced-diameter end will pass through the valve seat 97 and contact the valve member 95 to unseat it by the time the bodies 14 and 15 are fully coupled.
  • Uncoupling of the bodies 14 and 15 will, of course, allow the spring 96 to reseat the ball 95 as the thrust rod 105 is moved back downwardly through the valve seat 97 as the shoulder 106 is moved away from the probe 91.
  • the fixed thrust rod 102 will be withdrawn from within the valve seat 100 to allow the spring 99 to reseat the ball 99 by the time the bodies are uncoupled.
  • Well bore apparatus adapted for suspension in a well bore from an electrical cable and comprising:
  • a well tool sized for passage through a well bore and including first and second separable body sections having their adjacent end portions respectively adapted for mating engagement;
  • pressure-generating hydraulic means on said first tool body and including a pump having a fluid outlet, a first fluid conduit coupled to said pump outlet, and motor means coupled to said pump;
  • pressure-responsive hydraulic means on said second tool body including pressureactuated means, and a second fluid conduit coupled to said pressure-actuated means for supplying hydraulic fluid thereto;
  • first and second mating conduit terminals respectively fluidly coupled to said first and second conduits mounted in coincidental alignment with one another on said first and second end portions and cooperatively arranged for mating engagement with one another when said end portions are secured together
  • first and second valve means respectively mounted in said first and second mating conduit terminals and cooperatively arranged for movement between open and closed positions to control fluid communication therethrough
  • valve-actuating means cooperatively arranged in at least one of said mating conduit terminals for moving said first and second valve means to their respective open positions when said end portions are secured together and for moving said first and second valve means to their respective closed positions when said end portions are released from one another.
  • the well bore apparatus of claim 1 further including:
  • first electrical conductor means on said first tool body connected to said motor means and adapted for connection to an electrical cable supporting said well tool;
  • first and second mating electrical connector means respectively connected to said first and second electrical conductor means mounted in coincidental alignment with one another on said first and second end portions and cooperatively arranged for mating engagement with one another when said end portions are secured together.
  • the well bore apparatus of claim 3 further including:
  • first electrical conductor means on said first tool body connected to said motor means and adapted for connection to an electrical cable supporting said well tool;
  • first and second mating electrical connector means respectively connected to said first and second electrical conductor means mounted in coincidental alignment with one another on said first and second end portions in a symmetrical pattern around said first and second mating conduit terminals and cooperatively arranged for mating engagement with one another when said end portions are secured together.
  • Well bore apparatus adapted for suspension in a well bore from an electrical cable and comprising:
  • a well tool sized for passage through a well bore and including first and second separable body sections having adjacent end portions respectively adapted for mating engagement;
  • first and second mating electrical connector means respectively connected to said first and second electrical conductor means mounted in coincidental alignment with one another on said first and second end portions and cooperatively arranged for 10 mating engagement with one another when said end portions are secured together.
  • first and second mating conduit terminals are respec- 5 tively mounted in coaxial alignment with the longitudina] axes of said first and second bodies.
  • the well bore apparatus of claim 7 further including:
  • first electrically-actuated means on said first tool first electrical conductor means on said first tool body connected to said first electrically-actuated means and adapted for connection to an electrical cable supporting said well tool;
  • first and second mating electrical connector means respectively connected to said first and second electrical conductor means mounted in coincidental alignment with one another on said first and second end portions in a symmetrical pattern around said first and second mating conduit terminals and cooperatively arranged for mating engagement with one another when said end portions are secured together.
  • Well bore apparatus adapted for suspension in a well bore from an electrical cable and comprising:
  • first and second separable body sections having adjacent cylindrical end portions complementally sized and shaped for telescopic engagement with one another;
  • pressure-generating hydraulic means on said first tool body including an enclosed fluid reservoir, a pump having a fluid intake coupled to said fluid reservoir and a fluid outlet, motor means coupled to said pump and adapted for driving said pump, a first fluid conduit coupled to said pump outlet, and a first tubular conduit terminal coupled to said first fluid conduit and coaxially mounted on said end portion of said first tool body;
  • pressure-responsive hydraulic means on said second tool body and including a wall-engaging member cooperatively mounted on said second tool body for movement between extended and retracted positions in relation thereto, pressure-actuated piston means cooperatively associated with said wallengaging member for selectively moving said wallengaging member at least from one of its said posi tions to the other of its said positions, a second fluid conduit coupled to said piston means, and a second tubular conduit terminal complementally sized and shaped for telescopic engagement with said first conduit terminal coupled to said second fluid conduit and coaxially mounted on said end portion of said second tool body for mating engagement with said first conduit terminal;
  • end-coupling means on said first and second end portions cooperatively arranged for releasably securing said end portions to one another to tandemly couple said tool bodies together;
  • first and second valve means respectively mounted in said first and second conduit terminals and cooperatively arranged for movement between open and closed positions to control fluid communication therethrough
  • valve-actuating means cooperatively arranged in at least one of said mating conduit terminals for moving said first and second valve means to their respective open positions when said end portions are secured together and for moving said first and second valve means to their respective closed positions when said end portions are released from one another.
  • first electrical conductor means on said first tool body connected to said motor means and adapted for connection to an electrical cable supporting said well tool;
  • first and second mating electrical connector means respectively connected to said first and second electrical conductor means mounted in coincidental alignment with one another on said first and second end portions in a symmetrical pattern around said first and second mating conduit terminals and cooperatively arranged for mating engagement with one another when said end portions are secured together.
  • first and second valve means include:
  • first and second annular valve seats respectively arranged around the internal bores of said first and second conduit terminals, first and second valve valve-actuating means include:
  • a first actuating member coaxially mounted within the internal bore of one of said conduit terminals and projecting outwardly therefrom for insertion through the other of said conduit terminals to engage the other valve member in said other conduit terminal and unseat said other valve member as said end-coupling means couple said end portions together;
  • a second actuating member movably mounted within the internal bore of said one conduit member and having a first portion extending alongside said first actuating member and projecting outwardly from said one conduit terminal for engagement with said other conduit terminal to shift said second actuating member toward the one valve seat and valve member in said one conduit terminal as said end portions are moved toward one another, said second actuating member having a second portion coaxially disposed in the internal bore of said one conduit terminal and adapted for insertion through said one valve seat to engage said one valve member therein and unseat said one valve member as said end-coupling means couple said end portions

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US00324936A 1972-01-26 1973-01-19 Apparatus for intercoupling well tool sections having electrical and fluid lines Expired - Lifetime US3831443A (en)

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960448A (en) * 1975-06-09 1976-06-01 Trw Inc. Holographic instrument for measuring stress in a borehole wall
DE3035905A1 (de) * 1980-09-24 1982-07-22 Christensen, Inc., 84115 Salt Lake City, Utah Vorrichtung zur fernuebertragung von informationen aus einem bohrloch zur erdoberflaeche waehrend des betriebs eines bohrgeraetes
USRE31607E (en) * 1977-07-28 1984-06-19 Shell Oil Company Circumferential acoustical detector
US4689994A (en) * 1984-11-09 1987-09-01 Westinghouse Electric Corp. Delivery system for a remote sensor
US4898236A (en) * 1986-03-07 1990-02-06 Downhole Systems Technology Canada Drill stem testing system
US5159978A (en) * 1991-08-13 1992-11-03 Halliburton Logging Services, Inc. Connecting apparatus for logging tools including electrical feedthrough and isolation system with bridle assembly
US5207096A (en) * 1990-06-11 1993-05-04 Institut Francais Du Petrole Advanced method and device for improving the production logs of an activated nonflowing well
US5492305A (en) * 1995-01-12 1996-02-20 Jem Industries, Inc. Connector assembly for connecting a source of fluid with a container to be filled
EP0733917A3 (de) * 1995-03-24 1999-06-16 Knapp, Oliver Messsonde für hydrogeologische Messungen
US6527050B1 (en) 2000-07-31 2003-03-04 David Sask Method and apparatus for formation damage removal
US20080245570A1 (en) * 2005-06-15 2008-10-09 Schlumberger Technology Corporation Modular connector and method
US20090025926A1 (en) * 2007-07-27 2009-01-29 Schlumberger Technology Corporation Field Joint for a Downhole Tool
US20090229817A1 (en) * 2005-06-15 2009-09-17 Ashers Partouche Modular connector and method
US20140014322A1 (en) * 2011-03-30 2014-01-16 Welltec A/S Fail-safe spring
US20140014315A1 (en) * 2011-03-30 2014-01-16 Welltec A/S Modular downhole tool
US20140014323A1 (en) * 2011-03-30 2014-01-16 Well Tec A/S Torque member
WO2014018040A1 (en) * 2012-07-26 2014-01-30 Halliburton Energy Services, Inc. Axis maintenance apparatus, systems, and methods
US20140246210A1 (en) * 2012-07-27 2014-09-04 US Seismic Systems, Inc. Remotely actuated clamping devices for borehole seismic sensing systems and methods of operating the same
US9732601B2 (en) 2012-12-07 2017-08-15 Ene29 S.Ar.L. Electrical device for well stimulation
US9816360B2 (en) * 2011-06-17 2017-11-14 David L. Abney, Inc. Subterranean tool with sealed electronic passage across multiple sections
US20180120473A1 (en) * 2015-06-03 2018-05-03 Halliburton Energy Services, Inc. Pressure balanced liquid scintillator for downhole gamma detection
WO2023203078A1 (en) * 2022-04-20 2023-10-26 Welltec A/S Downhole tool string
EP4276272A1 (en) * 2022-05-11 2023-11-15 Welltec A/S Downhole tool string

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Publication number Priority date Publication date Assignee Title
FR2681373B1 (fr) * 1991-09-17 1993-10-29 Institut Francais Petrole Dispositif perfectionne de surveillance d'un gisement pour puits de production.

Citations (1)

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Publication number Priority date Publication date Assignee Title
US3537476A (en) * 1968-11-29 1970-11-03 Aeroquip Corp Fluid coupling connectable under high pressure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537476A (en) * 1968-11-29 1970-11-03 Aeroquip Corp Fluid coupling connectable under high pressure

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960448A (en) * 1975-06-09 1976-06-01 Trw Inc. Holographic instrument for measuring stress in a borehole wall
USRE31607E (en) * 1977-07-28 1984-06-19 Shell Oil Company Circumferential acoustical detector
DE3035905A1 (de) * 1980-09-24 1982-07-22 Christensen, Inc., 84115 Salt Lake City, Utah Vorrichtung zur fernuebertragung von informationen aus einem bohrloch zur erdoberflaeche waehrend des betriebs eines bohrgeraetes
US4689994A (en) * 1984-11-09 1987-09-01 Westinghouse Electric Corp. Delivery system for a remote sensor
US4898236A (en) * 1986-03-07 1990-02-06 Downhole Systems Technology Canada Drill stem testing system
US5207096A (en) * 1990-06-11 1993-05-04 Institut Francais Du Petrole Advanced method and device for improving the production logs of an activated nonflowing well
US5159978A (en) * 1991-08-13 1992-11-03 Halliburton Logging Services, Inc. Connecting apparatus for logging tools including electrical feedthrough and isolation system with bridle assembly
US5492305A (en) * 1995-01-12 1996-02-20 Jem Industries, Inc. Connector assembly for connecting a source of fluid with a container to be filled
EP0733917A3 (de) * 1995-03-24 1999-06-16 Knapp, Oliver Messsonde für hydrogeologische Messungen
US6722438B2 (en) 2000-07-31 2004-04-20 David Sask Method and apparatus for formation damage removal
US20040168800A1 (en) * 2000-07-31 2004-09-02 David Sask Method and apparatus for formation damage removal
US6959762B2 (en) 2000-07-31 2005-11-01 David Sask Method and apparatus for formation damage removal
US6527050B1 (en) 2000-07-31 2003-03-04 David Sask Method and apparatus for formation damage removal
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Also Published As

Publication number Publication date
FR2168920B1 (enExample) 1975-06-13
FR2168920A1 (enExample) 1973-09-07

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