WO2017027664A1 - Pump chamber position indicator - Google Patents

Pump chamber position indicator Download PDF

Info

Publication number
WO2017027664A1
WO2017027664A1 PCT/US2016/046474 US2016046474W WO2017027664A1 WO 2017027664 A1 WO2017027664 A1 WO 2017027664A1 US 2016046474 W US2016046474 W US 2016046474W WO 2017027664 A1 WO2017027664 A1 WO 2017027664A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible
fluid
pump
flexible bladder
mud
Prior art date
Application number
PCT/US2016/046474
Other languages
English (en)
French (fr)
Inventor
Ahmet Duman
Dat Manh Nguyen
Michael John DENK
Original Assignee
Hydril USA Distribution LLC
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 Hydril USA Distribution LLC filed Critical Hydril USA Distribution LLC
Priority to CN201680047151.XA priority Critical patent/CN108026916B/zh
Priority to BR112018001458A priority patent/BR112018001458A2/pt
Publication of WO2017027664A1 publication Critical patent/WO2017027664A1/en
Priority to NO20180096A priority patent/NO20180096A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • 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
    • 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
    • E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
    • 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
    • E21B21/082—Dual gradient systems, i.e. using two hydrostatic gradients or drilling fluid densities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0081—Special features systems, control, safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0201—Position of the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/09—Motor parameters of linear hydraulic motors
    • F04B2203/0903—Position of the driving piston

Definitions

  • a drilling riser In subsea drilling operations, equipment on the seabed is connected to a platform or vessel via a drilling riser.
  • the riser typically provides a return path for drilling mud that has been used in drilling operations to retum the mud to the vessel or platform.
  • the mud returning through the riser can have a density greater than that of the ambient seawater, so that the pressure exerted on a formation in the seabed by the column of mud in the riser is greater than that exerted by seawater in the absence of the riser.
  • a pump can be placed on the seabed, and can be powered, for example, by a seawater powered turbine.
  • the pump serves to isolate the well from the hydrostatic pressure of the mud by directing the mud through a separate retum line, thereby allowing replacement of the mud in the riser with seawater.
  • the pump includes a pump housing, wherein the pump housing includes a flexible bladder disposed therein; a first fluid zone, wherein the first fluid zone is operable to allow flow of a first fluid into and out of the first fluid zone; and a second fluid zone, wherein the second fluid zone is operable to allow flow of a second fluid into and out of the second fluid zone.
  • the pump further includes a flexible position indicator disposed in the first fluid zone and in communication with the flexible bladder, wherein the flexible position indicator is operable to detect a linear position of the flexible bladder, and wherein the flexible bladder fluidly isolates the first fluid zone from the second fluid zone.
  • the drilling system includes a water supply line comprising a water supply line inlet and a water supply line outlet; a manifold inlet, the manifold inlet in fluid communication with the water supply line; and a mud return line comprising a mud return line inlet and a mud return line outlet.
  • the system further includes a mud lead line, the mud lead line in fluid communication with the mud return line; a pump housing, wherein the pump housing includes a flexible bladder disposed therein, wherein the flexible bladder fluidly isolates the manifold inlet from the mud lead line; and a flexible position indicator disposed proximate the manifold inlet and in communication with the flexible bladder, wherein the flexible position indicator is operable to detect a linear position of the flexible bladder within the pump housing.
  • a method for detecting displacement of a displaceable component in a pump housing includes the steps of disposing a flexible position indicator proximate the pump housing and in communication with the displaceable component in the pump housing, the displaceable component operable to be displaced by fluid movement in the pump housing; allowing the flexible position indicator to be displaced responsive to movement of the displaceable component in the pump housing; detecting a displacement of the flexible position indicator; and monitoring a position of the displaceable component in the pump housing.
  • FIG. 1 is a schematic diagram of a mud pump.
  • FIG. 2 is a schematic diagram of a mud pump depicting the pressurizing of mud within a mud space.
  • FIG. 3 is a schematic diagram of a mud pump of the present disclosure.
  • FIG. 4 is a graphic illustration of a position indicator with a transducer cable.
  • FIG. 5 is an enlarged view of a ferrule connector from FIG. 4. DETAILED DESCRIPTION
  • FIG. 1 includes a side sectional view of an example of a pump 10 for use with a lift pump assembly (not shown).
  • Pump 10 includes a generally hollow pump housing 12.
  • An embodiment of a flexible bladder 14 is shown within the housing 12, which partitions the space within the housing 12 to define a mud space 16 on one side of the flexible bladder 14, and a water space 18 on an opposing side of flexible bladder 14.
  • Flexible bladder 14 provides a fluidly-sealing barrier between mud space 16 and water space 18.
  • flexible bladder 14 has a generally elliptical shape and an upper open space 20 formed through a side wall.
  • Upper open space 20 is shown coaxially registered with an opening 22 formed through a side wall of pump housing 12.
  • a disk-like cap 24 bolts onto opening 22, where cap 24 has an axially downward depending lip 26 that coaxially inserts within opening 22 and upper open space 20.
  • a portion of the flexible bladder 14 adjacent its upper open space 20 is wedged between lip 26 and opening 22 to form a sealing surface between flexible bladder 14 and pump housing 12.
  • a lower open space 28 is formed on a lower end of flexible bladder 14 distal from upper open space 20, which in the example of FIG. 1 is coaxial with upper open space 20.
  • An elliptical bumper 30 is shown coaxially set in the lower open space 28.
  • the bumper 30 includes upper and lower segments 32, 34, which are coupled together in a clamshell like arrangement, and respectively seal against upper and lower radial surfaces on the lower open space 28.
  • the combination of sealing engagement of cap 24 and bumper 30 with upper and lower open spaces 20, 28 of flexible bladder 14, effectively define a flow barrier across the opposing surfaces of flexible bladder 14.
  • an axial rod 36 that attaches coaxially to upper segment 32 and extends axially away from lower segment 34 and through opening 22.
  • the rod 36 acts as a position indicator which, according to its axial position within the housing 12, can indicate the position of the flexible bladder 14 within the housing 12.
  • a mud return line 38 is shown having an inlet end 40 and an outlet end 42.
  • a mud inlet valve 44 in mud return line 38 provides selective fluid communication from inlet end 40 to a mud lead line 46 shown branching from mud return line 38.
  • Lead line 46 attaches to an annular connector 48, which in the illustrated example is bolted onto housing 12.
  • Connector 48 mounts coaxially over an opening 50 shown formed through a sidewall of housing 12 and allows communication between mud space 16 and mud return line 38 through lead line 46.
  • a mud exit valve 52 is shown in mud return line 38 and provides selective communication between mud return line 38 and outlet end 42.
  • Water may be selectively delivered into water space 18 via a water supply line 54.
  • a water inlet lead line 56 has an end coupled with water supply line 54 and an opposing end attached with a manifold assembly 58 that mounts onto cap 24.
  • the embodiment of the manifold assembly 58 of FIG. 1 includes a connector 60 mounted onto a free end of a tubular manifold inlet 62, an annular body 64, and a tubular manifold outlet 66, where the inlet and outlet 62, 66 mount on opposing lateral sides of the body 64 and are in fluid communication with body 64.
  • Connector 60 provides a connection point for an end of water inlet lead line 56 to manifold inlet 62, so that lead line 56 is in fluid communication with body 64.
  • a lower end of manifold body 64 couples onto cap 24, and the annulus of the manifold body 64 is in fluid communication with water space 18 through a hole in the cap 24 that registers with opening 22.
  • An outlet connector 68 is provided on an end of manifold outlet 66 distal from manifold body 64, which has an end opposite its connection to manifold outlet 66 that is attached to a water outlet lead line 70.
  • water outlet lead line 70 attaches to a water discharge line 72.
  • a water inlet valve 74 shown in water inlet lead line 56 provides selective water communication from a vessel (not shown) to water space 18 via water inlet lead line 56 and manifold assembly 58.
  • a water outlet valve 76 shown in water outlet lead line 70 selectively provides communication between water space 18 and water discharge line 72 through manifold assembly 58 and water outlet lead line 70.
  • mud inlet valve 44 is in an open configuration, so that mud in mud return line 38 communicates into mud return line 38 and mud lead line 46 as indicated by arrow AM.
  • mud exit valve 52 is in a closed position thereby diverting mud flow into connector 48, through opening 50, and into mud space 16.
  • flexible bladder 14 is urged in a direction away from opening 50 by the influx of mud, thereby imparting a force against water within water space 18.
  • water outlet valve 76 is in an open position, so that water forced from water space 18 by flexible bladder 14 can flow through manifold body 64 and manifold outlet 66 as illustrated by arrow Awo.
  • FIG. 2 An example of pressurizing mud within mud space 16 is illustrated in FIG. 2, wherein valves 44, 76 are in a closed position and valves 74, 52 are in an open position.
  • pressurized water from water supply line 54 is free to enter manifold assembly 58, where as illustrated by arrow Awi, the water is diverted through opening 22 and into water space 18.
  • Introducing pressurized water into water space 18 urges flexible bladder 14 in a direction shown by arrow AD.
  • Pressurized water in the water space 18 urges flexible bladder 14 against the mud, which pressurizes mud in mud space 16 and directs it through opening 50.
  • the pressurized mud flows into lead line 46, where it is diverted to mud return line 38 through open mud exit valve 52 as illustrated by arrow AMO.
  • water supply line 54 can sufficiently pressurize mud within mud return line 38 to force mud to flow back to a vessel (not shown).
  • axial rod 36 attaches to upper segment 32 of the bumper 30, which is in turn attached to the lower open space 28 of the flexible bladder 14.
  • One purpose of the rod 36 is to act as a position indicator, which indicates the position of the flexible bladder 14 within the housing 12.
  • One problem associated with the rod 36 is that operation of the pump 10 requires the rod to move up and down relative to the housing 12 and other pump components, including portions of the manifold assembly 58.
  • one embodiment of the present invention provides a pump assembly 100 having certain components shown in FIGS. 1 and 2.
  • Rod 36 is not present, and instead a flexible cable 136 is shown. Cable 136 extends through the manifold assembly 58 and can connect to the upper segment 32 of the bumper 30, as shown.
  • cable 136 can act as a position indicator for the flexible bladder 14 with surprising and unexpected advantages over the rod 36.
  • the cable 136 has a significantly smaller diameter.
  • the diameter of the cable 136 is about 1/8 of an inch. In other embodiments, the diameter of the cable 136 is about 1/16 of an inch.
  • cable 136 is flexible, such that spooling the cable 136 instead of retracting the rod 36 away from the housing 12 results in occupying less space, for example in manifold assembly 58.
  • the cable 136 is smaller in diameter and is flexible, in certain embodiments, the cable 136 does not require as many components and interfaces subject to wear and tear as the rod 36 in the prior art embodiment. In certain embodiments, the use of the cable 136 allows less interface stack-up and less manufacturing tolerances because interfaces between bushings and the housing 12, interfaces between bushing and the rod 36, and/or interfaces between the housing 12 and sensors do not require fine control. In certain embodiments, lubrication around the interfaces is no longer required. Accordingly, the pump assembly 100 has a longer operating life. Furthermore, the flexible bladder is less likely to wrap around the cable 136, and the cable 136 will be less sensitive to operator error during flexible bladder break-in, pump chamber filling, and pressure testing.
  • cable 136 is coaxial with and extends through the manifold assembly 58 and can connect to the upper segment 32 of the bumper 30.
  • cable 136 can be in communication with other components of the flexible bladder 14 and will be displaced responsive to the movement of the bumper 30 and/or other components moving in pump housing 12 in response to fluid flow.
  • Cable 136 in other embodiments, need not be coaxial with the manifold assembly 58, and more than one cable can be used, in some embodiments, to detect certain displacements of components in hollow pump housing 12 in response to fluid flow.
  • a linear variable displacement transducer LVDT
  • FIG. 4 a graphic representation of the linear sensor used in the presently described experiment is shown.
  • the sensor had a resolution of 0.0027 inches per millivolt (0.068 mm per millivolt) (26.6 inches total range / 10.00 volts).
  • the maximum variation in the fully-extended data was about 72 millivolts. This corresponds to an error of about 0.194 inches maximum over one million cycles.
  • the maximum variation in the fully -retracted data was about 245 millivolts. This corresponds to a maximum error of about 0.66 inches over one million cycles.
  • Linear sensor 400 includes a sensor housing 402, sensor enclosure panels 404, a sensor body 406 disposed between the sensor housing 402 and a sensor conduit 408, a transducer cable 410 axially-aligned with and disposed in the sensor conduit 408, and a ferrule connector 412.
  • Sensor housing 402 further includes a spool assembly 414 and guide rollers 416 for transducer cable 410.
  • ferrule connector 412 can be removeably connected to upper segment 32 of the bumper 30, and as water space 18 is filled, transducer cable 410 would be pulled out of sensor conduit 408 allowing for detection of displacement of the linear sensor 400.
  • transducer cable 410 would retract into sensor conduit 408 and sensor housing 402 allowing for detection of displacement of the linear sensor 400.
  • the sensor housing 402 includes an internal pre-tensioned coil spring (not shown), where the coil spring causes the cable 410 to always be in tension.
  • the tension is not strong enough to physically cause the flexible bladder 14 to move.
  • tension in the wire is sufficient to both allow the cable to extend (as the bladder moves toward mud space 16) and cause the cable 410 to retract quickly enough, preventing the cable 410 from having slack (as the bladder moves toward the water space 18).
  • FIG. 5 shows an enlarged view of ferrule connector 412. As shown, ferrule connector 412 includes threads 418 and cable connector 420.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Earth Drilling (AREA)
PCT/US2016/046474 2015-08-11 2016-08-11 Pump chamber position indicator WO2017027664A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680047151.XA CN108026916B (zh) 2015-08-11 2016-08-11 泵腔室位置指示器
BR112018001458A BR112018001458A2 (pt) 2015-08-11 2016-08-11 ?bomba com um indicador de posição, sistema de perfuração de gradiente e método para detectar deslocamento de um componente?
NO20180096A NO20180096A1 (en) 2015-08-11 2018-01-22 Pump chamber position indicator

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201562203779P 2015-08-11 2015-08-11
US62/203,779 2015-08-11
US15/233,411 US20170045044A1 (en) 2015-08-11 2016-08-10 Pump chamber position indicator
US15/233,411 2016-08-10

Publications (1)

Publication Number Publication Date
WO2017027664A1 true WO2017027664A1 (en) 2017-02-16

Family

ID=56799578

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/046474 WO2017027664A1 (en) 2015-08-11 2016-08-11 Pump chamber position indicator

Country Status (5)

Country Link
US (2) US20170045044A1 (zh)
CN (1) CN108026916B (zh)
BR (1) BR112018001458A2 (zh)
NO (1) NO20180096A1 (zh)
WO (1) WO2017027664A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3862565A4 (en) * 2018-10-02 2022-05-18 Obshchestvo S Ogranichennoj Otvetstvennost'yu "Toreg" PUMPING PLANT

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703055A (en) * 1950-07-21 1955-03-01 Shell Dev Diaphragm-type mud pump
DE29714647U1 (de) * 1997-08-16 1997-12-11 Hutzenlaub, Jens, 52064 Aachen Dehnungsmeßstreifen zur Erkennung der Membranendlagen in pneumatisch betriebenen Membranpumpen, vorzugsweise Membranblutpumpen
DE19706513A1 (de) * 1997-02-19 1998-08-20 Inst Mikro Und Informationstec Mikrodosiervorrichtung und Verfahren zum Betreiben derselben
US6102673A (en) * 1998-03-27 2000-08-15 Hydril Company Subsea mud pump with reduced pulsation
US20040188094A1 (en) * 2003-03-24 2004-09-30 Michael Piecyk Wireline subsea metering head and method of use
US20140262505A1 (en) * 2013-03-15 2014-09-18 Hydril Usa Manufacturing Llc Automatic pump chamber control adjustment

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Publication number Priority date Publication date Assignee Title
US3926047A (en) * 1972-06-15 1975-12-16 Atlantic Richfield Co Well production signal means
US4292740A (en) * 1979-06-07 1981-10-06 Candid Logic, Inc. Self-actuated displacement transducer
US5146784A (en) * 1991-03-04 1992-09-15 Vista Research, Inc. Sensor for measuring liquid-level changes in storage tanks
US5518015A (en) * 1994-09-30 1996-05-21 Gas Research Institute Automatic calibrating electrically controlled diaphragm valve actuators and methods for their calibration
US6325159B1 (en) * 1998-03-27 2001-12-04 Hydril Company Offshore drilling system
US6562164B1 (en) * 1998-11-13 2003-05-13 Battelle Memorial Institute System for terminating optical cables
WO2005065411A2 (en) * 2003-12-31 2005-07-21 Saudi Arabian Oil Company Test apparatus for direct measurement of expansion and shrinkage of oil well cements
US20080060811A1 (en) * 2006-09-13 2008-03-13 Halliburton Energy Services, Inc. Method to control the physical interface between two or more fluids
US10036378B2 (en) * 2013-02-28 2018-07-31 Ingersoll-Rand Company Positive displacement pump with pressure compensating calibration

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703055A (en) * 1950-07-21 1955-03-01 Shell Dev Diaphragm-type mud pump
DE19706513A1 (de) * 1997-02-19 1998-08-20 Inst Mikro Und Informationstec Mikrodosiervorrichtung und Verfahren zum Betreiben derselben
DE29714647U1 (de) * 1997-08-16 1997-12-11 Hutzenlaub, Jens, 52064 Aachen Dehnungsmeßstreifen zur Erkennung der Membranendlagen in pneumatisch betriebenen Membranpumpen, vorzugsweise Membranblutpumpen
US6102673A (en) * 1998-03-27 2000-08-15 Hydril Company Subsea mud pump with reduced pulsation
US20040188094A1 (en) * 2003-03-24 2004-09-30 Michael Piecyk Wireline subsea metering head and method of use
US20140262505A1 (en) * 2013-03-15 2014-09-18 Hydril Usa Manufacturing Llc Automatic pump chamber control adjustment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3862565A4 (en) * 2018-10-02 2022-05-18 Obshchestvo S Ogranichennoj Otvetstvennost'yu "Toreg" PUMPING PLANT
AU2019352546B2 (en) * 2018-10-02 2023-07-13 Obshchestvo S Ogranichennoj Otvetstvennost'yu "Toreg" Pump assembly

Also Published As

Publication number Publication date
CN108026916B (zh) 2019-09-24
NO20180096A1 (en) 2018-01-22
CN108026916A (zh) 2018-05-11
US20170045044A1 (en) 2017-02-16
BR112018001458A2 (pt) 2018-09-11
US20200116142A1 (en) 2020-04-16

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