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WO2004092538A1 - Tete d'entrainement de pompe perfectionnee dotee d'une boite a garniture integree - Google Patents

Tete d'entrainement de pompe perfectionnee dotee d'une boite a garniture integree Download PDF

Info

Publication number
WO2004092538A1
WO2004092538A1 PCT/IT2003/000233 IT0300233W WO2004092538A1 WO 2004092538 A1 WO2004092538 A1 WO 2004092538A1 IT 0300233 W IT0300233 W IT 0300233W WO 2004092538 A1 WO2004092538 A1 WO 2004092538A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
jaw
stuffing box
seals
rotating
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IT2003/000233
Other languages
English (en)
Inventor
Mariano Pecorari
Pietro Pecorari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAI HYDRAULICS Inc
Original Assignee
SAI HYDRAULICS Inc
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 SAI HYDRAULICS Inc filed Critical SAI HYDRAULICS Inc
Priority to PCT/IT2003/000233 priority Critical patent/WO2004092538A1/fr
Priority to AU2003230206A priority patent/AU2003230206A1/en
Priority to CA002522257A priority patent/CA2522257A1/fr
Priority to AU2003292540A priority patent/AU2003292540A1/en
Priority to CN200380110255.3A priority patent/CN1764768A/zh
Priority to BRPI0318253-3A priority patent/BR0318253A/pt
Priority to PCT/IT2003/000779 priority patent/WO2004092539A1/fr
Priority to MXPA05011096A priority patent/MXPA05011096A/es
Publication of WO2004092538A1 publication Critical patent/WO2004092538A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive

Definitions

  • the invention relates to an improved pump drive head having an integrated stuffing box, i.e. a drive head for mounting at the top of crude oil wells to operate the pump installed in the well, the pump being most commonly a positive displacement rotary design having a progressing helical cavity.
  • an integrated stuffing box i.e. a drive head for mounting at the top of crude oil wells to operate the pump installed in the well, the pump being most commonly a positive displacement rotary design having a progressing helical cavity.
  • constant delivery rate wells mount electric motors connected drivingly to the pump shaft, the pump being as mentioned most commonly a rotary positive displacement type with a progressing helical cavity.
  • a hydraulic motor is provided with a variable ratio hydraulic drive for tracking the well delivery rate up to steady state.
  • the power transmission of the drive may include a gear or belt arrangement.
  • the pump is to be coupled to the drive somewhere above the stuffing box, such that the interior of the well pipe, where the oil pressure is that created by the pump or is the pressure of the well itself, can be held isolated and the drive advantageously maintained at atmospheric pressure.
  • the transmission bearing block must withstand high axial thrust forces .
  • the dual function of the drive main bearings/pump shaft thrust bearing invariably involves overhauling the whole drive, rather than just the thrust bearing as the component most subject to failure.
  • Field disassembly of the drive requires more than an hour, compared to the 20 to 40 minute time limit for the well shutdown .
  • the underlying technical problem of the invention is to provide a pump drive head, the stuffing box and/or thrust bearing of which can be readily replaced without the drive having to be disassembled in the field, and while still using the conventional checking method of tapping at different levels.
  • ZAnother object is to allow for both standard and packing-type seals to be replaced the same way.
  • an improved pump drive head having an integrated stuffing box and comprising: a power transmission coupled to the rotating pump driveshaft within a crude oil well; a stuffing box to retain the pressure; a thrust assembly adapted to take the tensile force exerted on said pump shaft; characterized in that said power transmission comprises a tube arranged to be rotated coaxially with the shaft and having at least two different diameters; that the rotating seals fit over the small outside diameter of the tube to establish fluid- tightness between said tube and the body of the stuffing box, the working diameter of the seals being smaller than the large outside diameter of said tube; and that static seals are provided between the tube and the shaft; thereby on disassembling, said rotating and static seals would come away along with said tube and the seal retainer ring.
  • the tube being rotated coaxially with the shaft, is connected with its bottom end rigidly to a rotating sleeve for rotation therewith, so as to define said small diameter and large diameter inside the stuffing box, the tube and sleeve forming a unitary piece when connected together.
  • a gasket is provided on the bottom end of said tube/sleeve for rotation therewith, the outside diameter of the gasket being a labyrinth pattern.
  • said gasket is connected to the seal retainer ring on said tube/sleeve of the stuffing box.
  • an outside- communicated tapping, hole is provided downstream of the gasket and/or the respective oil seals in the direction of the pressurized flow from the well.
  • the rotating seals are packing seals
  • an oil seal is provided downstream of the inlet hole for the liquid lubricant to the packing, with the packing being placed between said rotating tube/sleeve and the inner seat of the stuffing box.
  • the packing is mounted on said rotating sleeve through at least one detent ring and a pre-load spring between the packing and said retainer.
  • the static seals are placed for reduced radial bulk in the joint region between said tube and said sleeve, and are compressed there to make a tight seal as said tube and sleeve are made fast together.
  • said tube is connected to the thrust assembly for rotation therewith by a rotating hub held in place by a guiding tighten-down means .
  • said guiding tighten- down means comprises a rolling thrust bearing and a bell enclosing said hub and said thrust bearing.
  • said hub is formed on its inside diameter with an axial slot for pulling out the connection tongue between said tube and the drive.
  • a 'clamp advantageously placed within the body of the stuffing box, comprises a jaw pair, one pulls and one pushes, operated through a screw arranged to act with its end on one jaw and engaged in a threaded hole formed in the other jaw.
  • said push and pull jaws are operated through a screw acting with its end on the push jaw and engaging in a threaded hole formed in the pull jaw.
  • the stem of the screw is cylindrical and fits through a seal in the cover.
  • Figure 1 is a longitudinal section view of the improved head according to the invention, showing the overall configurations of the stuffing box, drive (here a gear power transmission) , thrust bearing, and clamp for locking the pump driveshaft;
  • Figure 2 is a partial enlarged view limited to the rotating bearings of the drive, thrust bearing, and stuffing box;
  • Figure 3 is a vertical cross-section view of the self-centering clamp for locking the pump driveshaft;
  • Figure 4 is a sectional plan view of the clamp of the preceding figure;
  • Figure 5 is a longitudinal section view of the improved head, with an unspecified drive, showing the overall configurations of the stuffing box, thrust bearing, and clamp for locking the pump driveshaft;
  • Figure 6 is an enlarged detail view of the head in Figure 5;
  • Figure 7 is a sectional view of the stuffing box highlighting the packing mount.
  • the wellhead 1 is shown to include the drive 2 with gears 3, 4 that are driven by the motor M, the gear 4 being keyed to a rotating tube 5 connected upwardly to the thrust assembly 6 and, through the conventional coupling 7, to the rotating driveshaft 8 of the pump down the well bore.
  • the stuffing box 9 is shown beneath the drive 2 and as being advantageously integrated here to the self-centering clamp 10 with jaws for locking the shaft 8.
  • Figure 2 shows in greater detail the main bearings 11 for the gear wheel 4 .on the housing 12 of the drive 2.
  • the rotating tube 5 is keyed to the gear wheel 4 by the tongue 13 and extends coaxially within the gear wheel 4.
  • the bottom end 14 of the tube 5 is threaded at 15 for engagement with the rotating sleeve 16 of the stuffing box.
  • Static ring seals 17 are held compressed between said end 14 and the sleeve 16, these being the parts that would bear on the rings during rotation.
  • the rotating sleeve 16 of the stuffing box carries the axial thrust bearing 18 arranged, inside the body 19 of said box, to take the axial load from the well pressure acting on the seals 20.
  • the retainer ring 22 Engaged threadably with the bottom end 21 of said rotating sleeve 16 is the retainer ring 22 arranged to retain said seals and used for pulling them off, the seals being shown held apart by spacers 23 that abut against said thrust bearing 18.
  • a rubber gasket 24 is connected to the retainer ring 22 which is formed with a peripheral labyrinth pattern 25 on its outside diameter to catch as much as possible of the solids trapped in the pumped fluid.
  • a radial tapping hole 26 is formed above the gasket 24 and at each oil seal 20 for use, when required, to check the respective upstream seal for leakage under the well pressure.
  • said tube 5 is shown connected rotatably to the hub 27 of the thrust bearing, to which it is fastened together with the top cover 28 by the screws 29.
  • This hub can rotate under the bell 30 covering the bearing 31 of the thrust assembly 6, and has an upper oil seal 32.
  • the bell is fastened to the housing 12 of the drive 2 by screws 33.
  • Said hub 27 is formed with an axial slot 34 on its inside diameter to allow the tongue 13 to be pulled away without the thrust assembly 6, i.e. the hub 27, bell 30 and bearing 31 having to be disassembled.
  • Figure 3 shows the pull and push jaws 35 and 36 around the outside diameter of the shaft 8.
  • the contact areas are knurled horizontally as at 37.
  • the jaw pair is closed by the outside-operated screw 38, which screw is provided with a seal 39 around its stem 40 to stop leakage of pressurized fluid.
  • the female threadway is formed in the body of the pull jaw 35, and the end of the screw 41 acts on the push jaw 36.
  • the clamp 10 is shown open, and shown closed in Figure 4.
  • at least two pins 43 and two springs 44 are placed between the pull jaw 35 and the cover 42, which are effective to keep the jaws from turning and bias them to the open position.
  • Shown in Figure 5 is the head for the power transmission 45 to the shaft of the pump 8 of a crude oil well, when the head is constructed other than from gears, e.g. comprises a pulley (not shown) keyed to the tube 46 by the tongue 47 to rotate with the tube.
  • the thrust assembly 6 is provided with a hub 48, similar to the hub 27 described above but formed with no axial slot. This thrust assembly, having to take radial forces on said tube 46 as well, additionally includes a radial bearing 49 and the sleeve 16 of the stuffing box 9.
  • Figure 6 shows in further detail the stuffing box with the oil seals 20 and intervening rings 23, and the static seals 17 held tight on said shaft 8 by the end 14 of the tube 46.
  • the hub 48 guides the sleeve 16 of the stuffing box, and above 'this, said tube 46.
  • this differs from the embodiment shown in Figure 2, wherein the sleeve 16 of the stuffing box and the tube 5 are guided on the hub of the gear wheel 4.
  • Figure 7 shows the bottom end 21 of said rotating sleeve 16 threadably engaged with the ring 22 to retain said packing 50 located between said sleeve and the inner seat 51 of the stuffing box 9.
  • the packing is retained on said sleeve by the retainer ring 22, the detent rings 52 and spring 53 against said thrust bearing 18.
  • a bored ring spacer 54 and an • oil seal 55 are provided between the packing 50 and said bearing 18.
  • Said inner seat 51 has a shoulder 56 for abutment by the ring 52 in the assembled state.
  • the spring 53 is to pre-load the packing 50, and in the assembled state, the ring 22 will be held spaced apart from the bottom detent ring 52.
  • the tapping holes.57, where provided, are covered by the packing 50.
  • the hole 58 is to admit lube oil to the inside diameter of the packing as this is sliding across the outer surface of said rotating sleeve 16. On possible collapsing failure of the packing 50, the well fluid would rise above the bearing 18 and overflow through the vent hole 59 at atmospheric pressure.
  • the wellhead and drive disassembling/re-assembling for servicing is effected, upon the shaft 8 being stopped from rotating, by operating the screw 38 to close .the clamp 10 such that its jaws 35, 36 will grip the shaft; the jaws self-centering themselves around the shaft without damaging it.
  • a conventional device is used for loosening the coupling .7 and releasing the connection between the shaft 8 and the rotating tube 5 or 46.
  • the sleeve 16 static seals 17 and oil seals 20 of the stuffing box 9 can be slipped off for quick replacement.
  • the tongue 13 would not interfere with removal of the tube 5 because of the slot 34 provided in the hub 27.
  • holes 26, in addition to being useful to tap off leakage past the oil seal 20 or the gasket 24 located upstream, may be used to introduce fluid, advantageously oil, under a pressure in order to enhance the sealing action of the affected oil seal 20, the pressure being propagated to the next oil seals in the direction toward the thrust bearing 18.
  • the ring 22 When the packing 50 is employed, the ring 22 would be retaining the packing 50 and detent rings 52 for assembling. For disassembling, the ring 22, by acting against said detent rings 52 and the fully compressed spring 53, would urge the compressed packing against the inner wall 51 of the box 9 and loosen it, thus allowing it to be removed as a whole .
  • Advantages of this invention are that: by having the stuffing box 9 mounted below the thrust assembly 6 and the drive components, full operational control of the rotating seals 20 or 50 and gasket 24 is achieved; by having the thrust assembly placed at the top, with the inner components of the stuffing box 9 removable through the top, replacement is quickly effected with only a very short well shutdown; the operator can thus maintain a comprehensive stock of spare parts that may include the thrust assembly 6, and directly replace any worn out or failed items in a wellhead.
  • clamp 10 could be provided, although less conveniently, as an independent unit rather than as an attachment to the body 19 of the stuffing box 9.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sealing Devices (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Earth Drilling (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

Selon la présente invention, une tête d'entraînement de pompe améliorée (1, 2) possède une boîte à garniture intégrée (9) et comprend une transmission de puissance (3, 4) couplée à l'arbre de transmission de pompe à rotation (8) à l'intérieur d'un puits de pétrole, une boîte à garniture (9) servant à retenir la pression, un ensemble de poussée axiale (6) conçu pour absorber la force de traction exercée sur ledit arbre de pompe. Ladite transmission de puissance comprend un tube (5, 16) qui est placé pour tourner coaxialement avec l'arbre (8) et qui possède au moins deux diamètres différents. Les joints rotatifs (20, 50) se fixent sur le petit diamètre externe du tube pour engendrer une étanchéité aux fluides entre ledit tube et le corps (19) de la boîte à garniture, le diamètre de travail (51) des joints (20, 50) étant inférieur au grand diamètre externe dudit tube (5, 16), et des joints statiques (17) se trouvant entre le tube et l'arbre (8). De ce fait, lors du démontage, les joints statiques (17) et rotatifs (20, 30) s'éloignent avec ledit tube et l'anneau de retenue de joints (22). De manière avantageuse, une fixation améliorée (10) permettant de verrouiller l'arbre de pompe à rotation (8) de la pompe au fond d'un puits de pétrole est associée à ladite tête et elle comprend une paire de mâchoires (35, 36), dont l'une (35) d'elles constitue une mâchoire de traction et l'autre (36) une mâchoire de poussée. Les deux mâchoires fonctionnent par le biais d'une vis (38) disposée de façon à agir avec son extrémité sur une mâchoire (35) et rentrer en contact avec un trou fileté formé dans l'autre mâchoire (36).
PCT/IT2003/000233 2003-04-15 2003-04-15 Tete d'entrainement de pompe perfectionnee dotee d'une boite a garniture integree Ceased WO2004092538A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
PCT/IT2003/000233 WO2004092538A1 (fr) 2003-04-15 2003-04-15 Tete d'entrainement de pompe perfectionnee dotee d'une boite a garniture integree
AU2003230206A AU2003230206A1 (en) 2003-04-15 2003-04-15 Improved pump drive head with integrated stuffing box
CA002522257A CA2522257A1 (fr) 2003-04-15 2003-11-26 Tete de commande de pompe amelioree comportant un presse-etoupe et un systeme de serrage integres
AU2003292540A AU2003292540A1 (en) 2003-04-15 2003-11-26 Improved pump drive head with integrated stuffing box and clamp
CN200380110255.3A CN1764768A (zh) 2003-04-15 2003-11-26 具有一体填料盒以及夹具的改良的泵驱动头
BRPI0318253-3A BR0318253A (pt) 2003-04-15 2003-11-26 cabeçote propulsor de bomba com engaxetamento e conjunto de sujeição por braçadeiras incorporado
PCT/IT2003/000779 WO2004092539A1 (fr) 2003-04-15 2003-11-26 Tete de commande de pompe amelioree comportant un presse-etoupe et un systeme de serrage integres
MXPA05011096A MXPA05011096A (es) 2003-04-15 2003-11-26 Cabezal impulsor de bomba mejorado con caja prensaestopas y abrazadera integradas.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2003/000233 WO2004092538A1 (fr) 2003-04-15 2003-04-15 Tete d'entrainement de pompe perfectionnee dotee d'une boite a garniture integree

Publications (1)

Publication Number Publication Date
WO2004092538A1 true WO2004092538A1 (fr) 2004-10-28

Family

ID=33187303

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/IT2003/000233 Ceased WO2004092538A1 (fr) 2003-04-15 2003-04-15 Tete d'entrainement de pompe perfectionnee dotee d'une boite a garniture integree
PCT/IT2003/000779 Ceased WO2004092539A1 (fr) 2003-04-15 2003-11-26 Tete de commande de pompe amelioree comportant un presse-etoupe et un systeme de serrage integres

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/IT2003/000779 Ceased WO2004092539A1 (fr) 2003-04-15 2003-11-26 Tete de commande de pompe amelioree comportant un presse-etoupe et un systeme de serrage integres

Country Status (6)

Country Link
CN (1) CN1764768A (fr)
AU (2) AU2003230206A1 (fr)
BR (1) BR0318253A (fr)
CA (1) CA2522257A1 (fr)
MX (1) MXPA05011096A (fr)
WO (2) WO2004092538A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2417744A (en) * 2004-09-03 2006-03-08 Weatherford Lamb Rotating stuffing box with split standpipe
WO2007069282A1 (fr) * 2005-12-14 2007-06-21 Sai Hydraulics, Inc. Presse-etoupe perfectionne pour tete de puits de petrole incorporant un mecanisme d’entrainement de pompe
CN102853083A (zh) * 2012-09-25 2013-01-02 福田雷沃国际重工股份有限公司 动力头防泥浆密封装置
USD706397S1 (en) 2011-08-19 2014-06-03 S.P.M. Flow Control, Inc. Portion of fluid end
USD706833S1 (en) 2012-04-27 2014-06-10 S.P.M. Flow Control, Inc. Center portion of a fluid cylinder for a pump
US9784262B2 (en) 2010-12-09 2017-10-10 S.P.M. Flow Control, Inc. Offset valve bore in a reciprocating pump
US9945362B2 (en) 2012-01-27 2018-04-17 S.P.M. Flow Control, Inc. Pump fluid end with integrated web portion
WO2020177349A1 (fr) * 2019-03-06 2020-09-10 无锡恒信北石科技有限公司 Système intelligent d'extraction d'huile utilisant une pompe à vis entièrement métallique

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7255163B2 (en) * 2004-08-10 2007-08-14 Rivard Raymond P Convertible rotary seal for progressing cavity pump drivehead
WO2008017210A1 (fr) * 2006-08-04 2008-02-14 Jun Liu Dispositif d'étanchéité mécanique d'une pompe à vis à commande directe par moteur
US7559359B2 (en) * 2007-08-27 2009-07-14 Williams John R Spring preloaded bearing assembly and well drilling equipment comprising same
WO2011015911A2 (fr) * 2009-08-06 2011-02-10 Gadu Inc. Ensemble presse-étoupe
CA2958761C (fr) 2014-10-01 2020-04-28 Exxonmobil Upstream Research Company Soupape de surete interne sous la surface pour pompes de fond de trou tournantes
WO2017023303A1 (fr) 2015-08-05 2017-02-09 Stren Microlift Technology, Llc Système de pompage hydraulique à utiliser avec un puits souterrain
EP3128124B1 (fr) * 2015-08-05 2018-09-26 Weatherford Technology Holdings, LLC Procédé et système de pompage
US10167865B2 (en) 2015-08-05 2019-01-01 Weatherford Technology Holdings, Llc Hydraulic pumping system with enhanced piston rod sealing
EP3203067B1 (fr) * 2016-02-05 2021-10-06 Graco Minnesota Inc. Détournement des fuites d'une pompe fluidique
US10344866B2 (en) * 2016-02-22 2019-07-09 Baker Hughes, A Ge Company, Llc Seal assembly for abrasion resistant bearing of centrifugal pump
CA2967606C (fr) 2017-05-18 2023-05-09 Peter Neufeld Boitier d'etancheite, appareils connexes et methodes d'utilisation

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US5551510A (en) * 1995-03-08 1996-09-03 Kudu Industries Inc. Safety coupling for rotary down hole pump
US20010050168A1 (en) * 2000-06-09 2001-12-13 Oil Lift Technology Inc. Pump drive head with stuffing box
WO2002038911A1 (fr) * 2000-11-10 2002-05-16 Weatherford/Lamb, Inc. Procédé et dispositif pour serrer une tige de pompage et pour la suspendre dans un puits de forage
US20020066572A1 (en) * 1994-10-20 2002-06-06 Muth Garold M. Pump systems and methods

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GB693100A (en) * 1951-03-29 1953-06-24 Anciens Ets J Hottiaux Semi-automatic control device for screw-threading machines of the opening head type and the like
GB962576A (en) * 1960-05-19 1964-07-01 Rheinstahl Gmbh Wanheim Improvements in or relating to clamping devices
DE3223748A1 (de) * 1982-06-25 1983-12-29 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Spannvorrichtung

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Publication number Priority date Publication date Assignee Title
US20020066572A1 (en) * 1994-10-20 2002-06-06 Muth Garold M. Pump systems and methods
US5551510A (en) * 1995-03-08 1996-09-03 Kudu Industries Inc. Safety coupling for rotary down hole pump
US20010050168A1 (en) * 2000-06-09 2001-12-13 Oil Lift Technology Inc. Pump drive head with stuffing box
WO2002038911A1 (fr) * 2000-11-10 2002-05-16 Weatherford/Lamb, Inc. Procédé et dispositif pour serrer une tige de pompage et pour la suspendre dans un puits de forage

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7337851B2 (en) 2004-09-03 2008-03-04 Weatherford/Lamb, Inc. Rotating stuffing box with split standpipe
GB2417744B (en) * 2004-09-03 2009-10-28 Weatherford Lamb Rotating stuffing box with split standpipe
AU2005205767B2 (en) * 2004-09-03 2010-05-20 Weatherford Technology Holdings, Llc Rotating stuffing box with split standpipe
GB2417744A (en) * 2004-09-03 2006-03-08 Weatherford Lamb Rotating stuffing box with split standpipe
WO2007069282A1 (fr) * 2005-12-14 2007-06-21 Sai Hydraulics, Inc. Presse-etoupe perfectionne pour tete de puits de petrole incorporant un mecanisme d’entrainement de pompe
US9784262B2 (en) 2010-12-09 2017-10-10 S.P.M. Flow Control, Inc. Offset valve bore in a reciprocating pump
US9989044B2 (en) 2010-12-09 2018-06-05 S.P.M. Flow Control, Inc. Offset valve bore in a reciprocating pump
USD706397S1 (en) 2011-08-19 2014-06-03 S.P.M. Flow Control, Inc. Portion of fluid end
US9945362B2 (en) 2012-01-27 2018-04-17 S.P.M. Flow Control, Inc. Pump fluid end with integrated web portion
US10330097B2 (en) 2012-01-27 2019-06-25 S.P.M. Flow Control, Inc. Pump fluid end with integrated web portion
US11401930B2 (en) 2012-01-27 2022-08-02 Spm Oil & Gas Inc. Method of manufacturing a fluid end block with integrated web portion
USD706833S1 (en) 2012-04-27 2014-06-10 S.P.M. Flow Control, Inc. Center portion of a fluid cylinder for a pump
CN102853083A (zh) * 2012-09-25 2013-01-02 福田雷沃国际重工股份有限公司 动力头防泥浆密封装置
WO2020177349A1 (fr) * 2019-03-06 2020-09-10 无锡恒信北石科技有限公司 Système intelligent d'extraction d'huile utilisant une pompe à vis entièrement métallique

Also Published As

Publication number Publication date
AU2003292540A1 (en) 2004-11-04
CA2522257A1 (fr) 2004-10-28
BR0318253A (pt) 2006-05-23
WO2004092539A1 (fr) 2004-10-28
AU2003230206A1 (en) 2004-11-04
CN1764768A (zh) 2006-04-26
MXPA05011096A (es) 2005-12-12

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