CN101363437A - Downhole linear electric motor oil-well pump - Google Patents
Downhole linear electric motor oil-well pump Download PDFInfo
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- CN101363437A CN101363437A CNA2008100135569A CN200810013556A CN101363437A CN 101363437 A CN101363437 A CN 101363437A CN A2008100135569 A CNA2008100135569 A CN A2008100135569A CN 200810013556 A CN200810013556 A CN 200810013556A CN 101363437 A CN101363437 A CN 101363437A
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Abstract
An oil well pump of an underground linear motion actuator is designed for solving the technical problems that as the structure of the existing linear oil well pumps are unreasonable, thus causing a mover to be deadlocked, a stator to be scrapped, a magnet to be eroded and the service life to be short, and the like, and the oil well pump of the underground linear motion actuator comprises two large parts: an oil well pump and a linear motor, wherein, the single-level armatures of the linear motion actuator are connected with each other by threads with a spigot in a spoke-work way and are located to seal with the end surface by the spigot; a phase-change connection wire is adopted between each section of the windings; the air gap of the linear motor is sealed by a small clearance; the magnetic pole of the mover is a radical magnetic circuit pole; an air expander is arranged in an outer shell of the linear motor. The linear motion actuator is connected with the oil well pump by a screen pipe; a special pump is designed on the upper end of the pump barrel, which changes a traditional oil circuit; a plunger piston and a push rod use solid cores in a pump barrel. The oil well pump of the underground linear motion actuator has the characteristics and beneficial effects of reasonable structure, saving energy and no polluting the environment, which is suitable for the use of directional wells; the parameter can be adjusted at any time according to the changes of different well liquid.
Description
Technical field:
The present invention relates to a kind of oil well pump, relate in particular to a kind of downhole linear electric motor oil-well pump.Mainly be applicable to the petroleum production application in oil field.
Background technique:
The linear dynamo oil pump that uses has following defective at present: the linear motor air gap does not have protective measure, makes crude oil, silt enter easy stuck mover in the air gap, corrodes the permanent magnet on the mover; Transformer oil in the armature that seals after the machine operation expands owing to temperature raises, and because of no pressure relief device makes the armature distortion, causes mover to sweep thorax, cover in damaging, and crude oil enters winding, and the destroyed motor that insulate can not be worked; The a plurality of single-unit armatures that are made of welded connection can't guarantee the coaxality and the straightness accuracy of more piece armature internal diameter, and cause mover to sweep thorax; The magnetic circuit magnetic pole of mover cutting orientation structure because of the too small insufficient strength of the diameter of axle, produces harmful amount of deflection, also causes mover to sweep thorax.The plunger pump structure that the oil circuit of existing linear dynamo oil pump adopts the oil field to use is become by pulling force to be stressed but these parts are former.Because of stressed change, hollow plunger and plunger push rod intensity with oil circuit effect are obviously not enough, and the amount of deflection friction pump barrel of generation has reduced working life, increases loss.Lack the working life of pump like this, can't promote.
Summary of the invention:
The present invention is in order to solve existing linear dynamo oil pump unreasonable structure, and cause mover stuck, sweep deficiencies such as thorax, magnet burn into working life is short, and a kind of downhole linear electric motor oil-well pump is provided, it mainly is made up of oil well pump 1 and linear motor 2 two large divisions; The armature of described linear motor 2 is in series by a plurality of single-unit armatures 121, is provided with special valve on pump barrel; Connect by the joint that is threaded between per two single-unit armatures 121, promptly be with the seam screw thread that silk 122 is screwed with internal thread gland 123 and be connected, and by seam location and seam end face seal; A plurality of single-unit armatures 121 are looked the series connection of a plurality of linear motors, and each saves and adopts commutation to connect between the winding; Be provided with 111 sealings of 101 pairs of air gaps of upper sleeve gasket 107 and lower sleeve gasket at the two ends of linear motor 2, be provided with hole usefulness ST shape seal ring 106 near upper sleeve gasket 107 places and cooperating with packed-piston 114; Be provided with axle ST shape seal ring 108 on the packed-piston 102 that moves about in lower sleeve gasket 101; The magnetic pole of the mover 112 of cover in 125 is magnetic circuit magnetic pole radially in armature, with permanent magnet 133 excitations, and has startup winding 132; In the shell of described linear motor 2, also be provided with the air expansion device; The special valve 214 of described oil pumping pump barrel 210 upper ends is connected with pump barrel 210 by pump barrel joint 209; Plunger 211 in pump barrel 210 and push rod 213 are real core; Be provided with in pump barrel 210 outsides and be distributed with oil inlet hole 215 on the pump case 212; Be provided with filler opening 216 with corresponding position, ball valve 206 position; Oil inlet hole 215 and filler opening 216 all are communicated with oil pocket in the pump case 212.
Characteristics of the present invention and beneficial effect: rational in infrastructure, energy saving, free from environmental pollution, suitable directional well use, and can realize carrying out parameter adjustment at any time according to the variation of different well liquid.Be embodied in:
By band seam screw thread silk is connected between the single-unit armature in the linear motor, adopt seam location and end face seal, its structure is compared with welded structure, do not have the welding distortion, can guarantee that the internal diameter of cover in the armature is concentric, good sealing effect, and technological method is simple, easy accessibility.
To the little clearance seal structure of the air gap sealed employing of linear motor, play compensation hydraulic and prevent that foreign object from entering the effect of motor gas-gap.
The magnetic pole of mover is made radially magnetic circuit magnetic pole, and permanent magnet is placed in the shell of sealing, and radially the magnetic circuit magnetic pole is provided with the startup winding.This structure is compared with tangential magnetic circuit, and radially the magnetic circuit leakage field is little, and motor performance is good, and can obtain large diameter mover axle, does not produce harmful amount of deflection when guaranteeing operation.Start winding and make this motor become the effect of asynchronous starting linear synchronized motor again, improved startability.
Commutation wiring between the single-unit armature winding, a plurality of single-unit armatures are looked the series connection of a plurality of linear motors, connect with commutation between each joint winding and eliminate asymmetric electric current, can raise the efficiency the minimizing noise.
The effect of the air expansion device in the linear motor shell behind the air expanded by heating in the armature of sealing, by the conduit between armature and expander, enters in the expansion sebific duct, can play the effect of pressure release, and then has guaranteed that the sealing armature is not subjected to the extruding of expansive force.
Existing tubular type plunger pump is improved, designed special valve, changed traditional oil circuit, plunger in pump barrel and push rod are made real core, have increased intensity, have eliminated hollow plunger and the big problem of push rod amount of deflection.
Can be during oil recovery according to operating mode, the parameter of regulating " downhole linear electric motor oil-well pump " with control cabinet at any time according to the variation of well liquid on ground is avoided occurring taking out phenomenon because of sky appears in the liquid measure deficiency, can save the energy, not fragile oil pump.
Description of drawings:
Fig. 1 overall structure formula intention of the present invention
Fig. 2 is Fig. 1 cathetus electric motor structure schematic representation
Fig. 3 is an armature single-unit connection diagram among Fig. 2
Fig. 4 is a mover magnetic circuit magnetic pole schematic representation radially among Fig. 2
Fig. 5 is an air expander structure schematic representation among Fig. 2
Fig. 6 is the wiring schematic diagram that three phase winding commutations of armature among Fig. 2 connect
Fig. 7-1 and Fig. 7 the-the 2nd, oil well pump structural representation among Fig. 1
Fig. 8 is a user mode structural representation of the present invention
Fig. 9 has the linear dynamo oil pump structural representation now
Figure 10 is an armature single-unit connection diagram among Fig. 9
Figure 11 is the tangential magnetic circuit magnetic pole of a mover schematic representation among Fig. 9
Embodiment:
Referring to Fig. 1 to Fig. 8, downhole linear electric motor oil-well pump, it mainly is made up of oil well pump 1 and linear motor 2 two large divisions; The armature of described linear motor 2 is in series by a plurality of single-unit armatures 121, is provided with special valve on pump barrel; Connect by the joint that is threaded between per two single-unit armatures 121, promptly be with the seam screw thread that silk 122 is screwed with internal thread gland 123 and be connected, and by seam location and seam end face seal; A plurality of single-unit armatures 121 are looked the series connection of a plurality of linear motors, and each saves and adopts commutation to connect between the winding; Be provided with 111 sealings of 101 pairs of air gaps of upper sleeve gasket 107 and lower sleeve gasket at the two ends of linear motor 2, be provided with hole usefulness ST shape seal ring 106 near upper sleeve gasket 107 places and cooperating with packed-piston 114; Be provided with axle ST shape seal ring 108 on the packed-piston 102 that moves about in lower sleeve gasket 101; The magnetic pole of the mover 112 of cover in 125 is magnetic circuit magnetic pole radially in armature, with permanent magnet 133 excitations, and has startup winding 132; In the shell of described linear motor 2, also be provided with the air expansion device; The special valve 214 of described oil pumping pump barrel 210 upper ends is connected with pump barrel 210 by pump barrel joint 209; Plunger 211 in pump barrel 210 and push rod 213 are real core; Be provided with in pump barrel 210 outsides and be distributed with oil inlet hole 215 on the pump case 212; Be provided with filler opening 216 with corresponding position, ball valve 206 position; Oil inlet hole 215 and filler opening 216 all are communicated with oil pocket in the pump case 212.
The described mode of connection that respectively saves commutation connection between the winding is:
It is first mutually that the tail X1 of the A1 phase of first segment 151 meets second joint, 152 B2, and it is first mutually that the tail Y2 of the B2 phase of second joint 152 meets the C3 of the 3rd joint 153, and the tail of C3 phase is Z3;
It is first mutually that the tail Y1 of the B1 phase of first segment 151 meets second joint, 152 C2, and it is first mutually that the tail Z2 of the C2 phase of second joint 152 meets the A3 of the 3rd joint 153, and the tail of A3 phase is X3;
It is first mutually that the tail Z1 of the C1 phase of first segment 151 meets second joint, 152 A2, and it is first mutually that the tail X2 of the A2 phase of second joint 152 meets the B3 of the 3rd joint 153, and the tail of B3 phase is Y3.
The described mover 112 radially mover axle 137 in the magnetic circuit magnetic pole is a conductive magnetic yoke, and pole shoe 134 is sealed and matched with permanent magnet 133 for ring-like steel bushing and startup winding copper sealing cover 132, axle sleeve 131, seal ring 136; Be welded with non-magnetic conductive metal 135 at described pole shoe 134 edges, and with start winding copper sealing cover 132 welded seals, start winding copper sealing cover 132 and axle sleeve by screw threads for fastening, and be coated with anaerobic adhesive thereon.
Described air expansion device is made up of expansion sebific duct 143, expansion sebific duct support 146 and expander outer cover 141, and its expansion sebific duct 143 is communicated with the conduit 144 that is positioned between armature and expander.
Described expansion sebific duct support 146 is made up of Stainless Steel Tube and helical baffle 142.
In the structure of described oil well pump special valve 214, standing valve 202 is located on the fixed valve base 203, and the one end is provided with standing valve cover 201; Corresponding with standing valve 202, on valve seat 204, be provided with ball valve 206, ball valve 206 is by spring 205 on the spring seat 207 and valve seat hold-down bolt 208 location.
Working principle:
The present invention upwards draws existing beam pumping unit by sucker rod the plunger of plunger pump on the ground, change the plunger oil recovery that upwards pushes away plunger pump with linear motor in the down-hole into, linear dynamo oil pump carries out the electromechanical integration combination to motor that drags on the ground and underground pump, be linear motor when moving downward by push rod stay column plug standing valve close, the ball valve of oil-feed is opened, oil enters the epicoele of oil pump, the ball valve of oil-feed was closed when linear motor pushed away plunger and moves upward by push rod, standing valve is opened, and realizes recovering the oil.
Embodiment
Referring to Fig. 9, Figure 10 and Figure 11, the linear dynamo oil pump that uses has following defective at present: linear motor air gap 305 does not have protective measure, crude oil enters air gap 305, is mixed in sedimentation in the crude oil in air gap, and straight-line mover 301 is stuck doing; Permanent magnet on chemical composition in the crude oil corrosion mover 301 loses magnetism magnet 308 and motor is quit work.After the magnet 308 that is corroded expands,, linear motor is quit work because mover 301 is stuck in air gap 305; Owing to winding 303 sealed with overlapping 304 in motor housing 302 and the armature, armature 307 the insides are full of transformer oil, after the motor proper functioning, temperature rising transformer oil expands, because of no pressure relief device makes the armature distortion, cause mover to sweep hall, cover in damaging, crude oil enters winding, and the destroyed motor that insulate can not be worked; Because armature, therefore can't be guaranteed the coaxality and the straightness accuracy of more piece armature internal diameter, and cause mover to sweep thorax by be made of welded connection (referring to Figure 10) by a plurality of single-units; Referring to Figure 11, the mover magnetic pole adopts the cutting orientation structure magnetic circuit, mover axle 309 passes from the centre of magnet 308, in order to obtain big magnetic pole area, cause the diameter of axle of mover too small, and insufficient strength, the amount of deflection that is subjected to producing after the working pressure is swept thorax, can cause motor working current to strengthen, cover 304 is easily leaked by mill in the armature, has destroyed winding insulation.Pump structure is unreasonable, the plunger of the plunger pump that beam pumping unit uses is subjected to pulling force, do not produce amount of deflection, use linear motor instead to push away oil circuit behind the plunger be that endoporus, the endoporus of plunger 313, traveling valve 314, the standing valve 315 of push rod oil inlet hole 311, plunger push rod 312 is the same with conventional pump and do not change, become by pulling force to be stressed but these parts are former.Because of stressed change, hollow plunger 313 and plunger push rod 312 intensity with oil circuit effect are obviously not enough, and the amount of deflection friction pump barrel of generation has reduced working life, increases loss, and this remains untouched to transplant and causes.These structure problems make the working life of existing linear dynamo oil pump the longest about three months, and are the shortest even several days, can't promote.At these problems the present invention is proposed.
Referring to Fig. 1 to Fig. 8, downhole linear electric motor oil-well pump, it mainly is made up of oil well pump 1 and linear motor 2 two large divisions.Linear motor is powered by three phase converter, and armature winding is three phase windings of 120 ° of electrical angles, the mover permanent magnet excitation.The motion mode of linear motor mover is the oscillating rectilinear motion at intermittence, and this is just meeting the working method of tubular type plunger pump.The armature of linear motor 2 is in series by a plurality of single-unit armatures 121, connect by the joint that is threaded between per two single-unit armatures 121, promptly be with the seam screw thread that silk 122 and internal thread gland 123 are tightened, adopt seam location and end face seal, band seam screw thread is equipped with linear bearing 110 or sliding bearing to the internal diameter of silk 122, and its structure is compared with welded structure, there is not the welding distortion, the internal diameter that can guarantee cover 125 in the armature is concentric, and technological method is simple, easy accessibility.
To the little clearance seal of the air gap sealed employing of linear motor, be provided with 101 pairs of upper sleeve gasket 107 and lower sleeve gaskets at the two ends of linear motor 2 air gap sealed.Be provided with hole usefulness ST shape seal ring 106 near upper sleeve gasket 107 places and cooperating with packed-piston 114; Be provided with axle ST shape seal ring 108 on the packed-piston 102 that moves about in lower sleeve gasket 101.When mover 112 moved downward, the packed-piston 102 that moves about was downward thereupon, and when mover 112 moved upward, the packed-piston 102 that moves about made progress thereupon, played compensation hydraulic and prevented that foreign object from entering the effect of motor gas-gap.
The sealing of mover magnetic pole and permanent magnet, the magnetic pole of the mover 112 in armature in the cover 125 is made radially magnetic circuit magnetic pole, mover axle 137 is a conductive magnetic yoke, and pole shoe 134 seals permanent magnet 133 for ring-like steel bushing and with it and startup winding copper sealing cover 132, axle sleeve 131, seal ring 136.Be welded with non-magnetic conductive metal 135 at pole shoe 134 edges, and with start winding copper sealing cover 132 welded seals, start winding copper sealing cover 132 and axle sleeve by screw threads for fastening, and be coated with anaerobic adhesive thereon, guarantee that sealing is reliable, prevent well corrosion magnet.This structure is compared with tangential magnetic circuit, and radially the magnetic circuit leakage field is little, and motor performance is good, and can obtain large diameter mover axle, does not produce harmful amount of deflection when guaranteeing operation.Group is scratched in startup makes this motor become the effect of asynchronous starting linear synchronized motor again, has improved startability.
Each economizes on electricity, and commutation connects between the pivot winding, because of the linear motor armature iron core is not a closed magnetic circuit, so produce asymmetric electric current in the winding.A plurality of single-unit armatures 121 are looked the series connection of a plurality of linear motors, connect with commutation between each joint winding and eliminate asymmetric electric current, can raise the efficiency the minimizing noise.
Its mode of connection is:
It is first mutually that the tail X1 of the A1 phase of first segment 151 meets second joint, 152 B2, and it is first mutually that the tail Y2 of the B2 phase of second joint 152 meets the C3 of the 3rd joint 153, and the phase tail of C3 phase is Z3;
It is first mutually that the tail Y1 of the B1 phase of first segment 151 meets second joint, 152 C2, and it is first mutually that the tail Z2 of the C2 phase of second joint 152 meets the A3 of the 3rd joint 153, and the phase tail of A3 phase is X3;
It is first mutually that the tail Z1 of the C1 phase of first segment 151 meets second joint, 152 A2, and it is first mutually that the tail X2 of the A2 phase of second joint 152 meets the B3 of the 3rd joint 153, and the phase tail of B3 phase is Y3.
The insulation of three phase windings is the H level.
Also be provided with the air expansion device in the shell of linear motor 2, this expander is made up of expansion sebific duct 143, expansion sebific duct support 146 and expander outer cover 141, and its expansion sebific duct 143 is communicated with the conduit 144 that is positioned between armature and expander.Behind the air expanded by heating in the armature 121 of sealing, enter in the expansion sebific duct 143 by conduit 144, the effect of playing pressure release has guaranteed that the sealing armature is not subjected to expansive force.Expansion sebific duct support 146 is made up of Stainless Steel Tube and helical baffle 142, and expansion sebific duct 143 dishes are on expansion sebific duct support 146, and the outside is protected with expander outer cover 141.
The packed-piston 114 of linear motor 2 is connected with the push rod 213 of pump, and the shell of linear motor 2 is by the composition the present invention that links together of screen casing 217 and oil well pump 1.
During installation, with cable 6 frequency variator 5 (control cabinet) is connected with linear motor 2, after the no-load running of ground, oil well pump 1 is assembled on the linear motor 2 by packed-piston 114, push rod 213 and screen casing 217, downhole linear electric motor oil-well pump is installed on the oil pipe 8 by box cupling 4, and oil pipe 8 is contained on the well head 7.
During work, when linear motor 2 moved downward by push rod 213 stay column plugs 211, standing valve 202 cut out, and the ball valve 206 of oil-feed is opened, and entered the epicoele of oil pumping pump barrel 210 by special valve 214 oil.When linear motor 2 pushed away plunger 211 and moves upward by push rod 213, the ball valve 206 of oil-feed was closed, and standing valve 202 is opened, and realized recovering the oil.Can regulate the parameter of " downhole linear electric motor oil-well pump " with control cabinet on ground according to operating mode during oil recovery.
Claims (6)
1. downhole linear electric motor oil-well pump, it mainly is made up of oil well pump (1) and linear motor (2) two large divisions; The armature of described linear motor (2) is in series by a plurality of single-unit armatures (121), is provided with special valve on pump barrel; It is characterized in that: connect by the joint that is threaded between per two single-unit armatures (121), promptly be with the seam screw thread that silk (122) is screwed with internal thread gland (123) and be connected, and by seam location and seam end face seal; A plurality of single-unit armatures (121) are looked the series connection of a plurality of linear motors, and each saves and adopts commutation to connect between the winding; Be provided with upper sleeve gasket (107) and lower sleeve gasket (101) sealing air gap (111) at the two ends of linear motor (2), locating to be provided with hole usefulness ST shape seal ring (106) near upper sleeve gasket (107) and cooperating with packed-piston (114); Be provided with axle ST shape seal ring (108) on the packed-piston that moves about (102) in lower sleeve gasket (101); The magnetic pole of the mover (112) of cover in (125) is magnetic circuit magnetic pole radially in armature, with permanent magnet (133) excitation, and has startup winding (132); In the shell of described linear motor (2), also be provided with the air expansion device; The special valve (214) of described oil pumping pump barrel (210) upper end is connected with pump barrel (210) by pump barrel joint (209); Plunger (211) and push rod (213) in pump barrel (210) are real core; On the pump case (212) of pump barrel (210) outside, be distributed with oil inlet hole (215); Be provided with filler opening (216) with ball valve (206) corresponding position, position; Oil inlet hole (215) and filler opening (216) all with pump case (212) in oil pocket be communicated with.
2. downhole linear electric motor oil-well pump according to claim 1 is characterized in that: the described mode of connection that respectively saves commutation connection between the winding is:
It is first mutually that the tail X1 of first segment (151) A1 phase meets second joint (152) B2, and it is first mutually that the tail Y2 of second joint (152) B2 phase meets the 3rd joint (153) C3, and the tail of C3 phase is Z3;
It is first mutually that the tail Y1 of first segment (151) B1 phase meets second joint (152) C2, and it is first mutually that the tail Z2 of second joint (152) C2 phase meets the 3rd joint (153) A3, and the tail of A3 phase is X3;
It is first mutually that the tail Z1 of first segment (151) C1 phase meets second joint (152) A2, and it is first mutually that the tail X2 of second joint (152) A2 phase meets the 3rd joint (153) B3, and the tail of B3 phase is Y3.
3. downhole linear electric motor oil-well pump according to claim 1, it is characterized in that: described mover (112) the radially mover axle (137) in the magnetic circuit magnetic pole is conductive magnetic yoke, and pole shoe (134) is sealed and matched with permanent magnet (133) for ring-like steel bushing and startup winding copper sealing cover (132), axle sleeve (131), seal ring (136); Be welded with non-magnetic conductive metal (135) at described pole shoe (134) edge, and with start winding copper sealing cover (132) welded seal, start winding copper sealing cover (132) and axle sleeve by screw threads for fastening, and be coated with anaerobic adhesive thereon.
4. downhole linear electric motor oil-well pump according to claim 1, it is characterized in that: described air expansion device is made up of expansion sebific duct (143), expansion sebific duct support (146) and expander outer cover (141), and its expansion sebific duct (143) is communicated with the conduit (144) that is positioned between armature and expander.
5. downhole linear electric motor oil-well pump according to claim 4 is characterized in that: described expansion sebific duct support (146) is made up of Stainless Steel Tube and helical baffle (142).
6. downhole linear electric motor oil-well pump according to claim 1 is characterized in that: in described oil well pump special valve (214) structure, standing valve (202) is located on the fixed valve base (203), and the one end is provided with standing valve cover (201); Corresponding with standing valve (202), on valve seat (204), be provided with ball valve (206), ball valve (206) is by spring (205) on the spring seat (207) and valve seat hold-down bolt (208) location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100135569A CN101363437B (en) | 2008-10-08 | 2008-10-08 | Downhole linear electric motor oil-well pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100135569A CN101363437B (en) | 2008-10-08 | 2008-10-08 | Downhole linear electric motor oil-well pump |
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| CN101363437A true CN101363437A (en) | 2009-02-11 |
| CN101363437B CN101363437B (en) | 2010-06-02 |
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| CN2008100135569A Active CN101363437B (en) | 2008-10-08 | 2008-10-08 | Downhole linear electric motor oil-well pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557145A (en) * | 2013-11-07 | 2014-02-05 | 胜利油田龙玺石油钢管有限公司 | Electric submersible oil reciprocation pump |
| CN108361182A (en) * | 2018-01-08 | 2018-08-03 | 诸暨市超前泵业科技有限公司 | Underground reciprocating formula rodless pump |
| CN109120130A (en) * | 2018-10-24 | 2019-01-01 | 浙江和京石油机械科技有限公司 | A kind of reciprocating submersible electric pump and its linear motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320182A (en) * | 1989-04-28 | 1994-06-14 | Baker Hughes Incorporated | Downhole pump |
| JP3550847B2 (en) * | 1996-01-24 | 2004-08-04 | 株式会社日立製作所 | Armature winding pattern of rotating electric machine |
| FR2746858B1 (en) * | 1996-03-29 | 2001-09-21 | Elf Aquitaine | LINEAR MOTOR ELECTRIC PUMP |
| CN1188598C (en) * | 2002-07-16 | 2005-02-09 | 姜树文 | Submerged-in-oil electric piston pump |
| CN2742188Y (en) * | 2004-10-12 | 2005-11-23 | 大庆油田有限责任公司 | Electric submerged plunger oil pumping unit |
| CN2938537Y (en) * | 2006-03-30 | 2007-08-22 | 哈尔滨泰富电气有限公司 | Cylindrical linear electric machine tangential magnetic circuit combined secondary pole |
| CN2932819Y (en) * | 2006-06-21 | 2007-08-08 | 王英浩 | Rare earth permanent-magnet linear oil extractor motor |
| CN100567700C (en) * | 2006-08-31 | 2009-12-09 | 大庆油田有限责任公司 | A kind of oil production system of reciprocating submersible electric pump that utilizes the sand control linear electric motors to drive |
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2008
- 2008-10-08 CN CN2008100135569A patent/CN101363437B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557145A (en) * | 2013-11-07 | 2014-02-05 | 胜利油田龙玺石油钢管有限公司 | Electric submersible oil reciprocation pump |
| CN103557145B (en) * | 2013-11-07 | 2016-03-09 | 山东祺龙海洋石油钢管股份有限公司 | Electric submersible oil reciprocation pump |
| CN108361182A (en) * | 2018-01-08 | 2018-08-03 | 诸暨市超前泵业科技有限公司 | Underground reciprocating formula rodless pump |
| CN108361182B (en) * | 2018-01-08 | 2023-08-15 | 诸暨市超前泵业科技有限公司 | Reciprocating rodless oil pump in pit |
| CN109120130A (en) * | 2018-10-24 | 2019-01-01 | 浙江和京石油机械科技有限公司 | A kind of reciprocating submersible electric pump and its linear motor |
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| Publication number | Publication date |
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| CN101363437B (en) | 2010-06-02 |
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