CN101701515A - Rodless oil extraction system driven by underground rotation motor - Google Patents
Rodless oil extraction system driven by underground rotation motor Download PDFInfo
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- CN101701515A CN101701515A CN200910237145A CN200910237145A CN101701515A CN 101701515 A CN101701515 A CN 101701515A CN 200910237145 A CN200910237145 A CN 200910237145A CN 200910237145 A CN200910237145 A CN 200910237145A CN 101701515 A CN101701515 A CN 101701515A
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Abstract
The invention relates to a rodless oil extraction system driven by an underground rotation motor and applied to the technical field of oil extraction in oil fields. The rodless oil extraction system comprises a pressure balance device, a three-phase asynchronous rotation motor, a mechanical transformation mechanism, a lower cylinder tube and a lower stopper. A balance piston and an upper spacing ring are arranged in an upper cylinder tube, a ventilation hole is arranged on the wall of the upper cylinder tube, the lower end of the upper cylinder tube is fixedly provided with the three-phase asynchronous rotation motor, the center of a motor shaft is provided with an axial through hole, the lower end of the three-phase asynchronous rotation motor is fixedly provided with the lower cylinder tube and the lower stopper, the mechanical transformation mechanism is arranged in the lower cylinder tube and comprises a shaft coupling, a lead screw and a nut, the upper end of the shaft coupling is connected with the motor shaft, the lower end of the shaft coupling is connected with the nut, and the lower end of the lead screw penetrates through a center hole of the lower stopper. The motor shaft drives the nut to rotate by the shaft coupling, the lead screw makes a linear reciprocating motion under the drive of the nut, and an oil pumping pump is driven to realize lifting oil pumping. The rodless oil extraction system driven by the underground rotation motor solves the problem of lopsided wear of a rod pipe existing in a directional well, enhances the efficiency of the oil pumping pump and lowers the energy consumption.
Description
Technical field
The present invention relates to oil recovery technique field, oil field, particularly Rodless oil extraction is the Rodless oil extraction system that a kind of underground rotation motor drives.Be applicable to that the producing well of rod and tube partial-wear easily takes place for directional well, inclined shaft.
Background technology
At present, advantage such as in mechanical oil recovery, oil pumper sucker rod pump hoisting system is simple in structure with it, technology maturation, reliability and durability, wide adaptability has occupied leading position, accounts for about 90% of artificially lifted well's number.But part also comes with some shortcomings: at first, have intrinsic reciprocal eccentric wear problem between sucker rod and the oil pipe.Along with oil field rise of water cut, the intensification of pump extension and increasing of special track well, this problem becomes more and more serious.Secondly, too much transmission link and need overcome the weight of sucker rod own and elastic deformation will consume a part of power causes finally that oil pumper sucker rod pump system effectiveness reduces, maintenance workload strengthens, and has increased the crude oil production cost.
Summary of the invention
The objective of the invention is: the Rodless oil extraction system that provides a kind of underground rotation motor to drive, realize that downhole electrical motor drives oil well pump lifting crude oil.System compares with the oil pumper sucker rod pumping, has fundamentally eliminated the rod and tube partial-wear problem, has reduced transmission link, improves oil recovery efficiency.
The technical solution used in the present invention is: the Rodless oil extraction system that underground rotation motor drives, mainly form by pressure equaliser, phase asynchronous electric rotating machine, machinery conversion mechanism, following cylinder barrel and lower end cap.It is characterized in that: pressure equaliser comprises upper isolating ring, spiracle, dummy piston and last cylinder barrel, screw thread is arranged at last cylinder barrel top, can be connected with oil pipe, has spiracle on the upper cylinder half barrel, in last cylinder barrel dummy piston is arranged, dummy piston is enclosed within on the outer wall of motor shaft.The lower end of last cylinder barrel is fixed with phase asynchronous electric rotating machine, and there is axially extending bore at the motor shaft center of phase asynchronous electric rotating machine, and the motor shaft upper end extends to more than the upper isolating ring.Be fixed with cylinder barrel down in the lower end of phase asynchronous electric rotating machine, the lower end of following cylinder barrel is fixed with lower end cap.Machinery conversion mechanism is in following cylinder barrel, and machinery conversion mechanism comprises shaft coupling, nut and leading screw.The shaft coupling upper end is connected with the motor shaft lower end, and the shaft coupling lower end is connected with the nut upper end.Nut and leading screw adopt threaded engagement, and the lower end cap centre bore is passed in the lower end of leading screw.
In order to improve sealing, between leading screw and lower end cap, sealing ring is arranged.
Mutually asynchronous electric rotating machine 5 is made up of end cap, motor housing, stator and rotor four parts, motor length overall 2.2m, motor housing external diameter 108mm, internal diameter 98mm.Stator is made up of stator core and stator winding, and stator core forms with the silicon steel plate stacking of 0.5mm, and the stator winding line is the circular copper wire of diameter 2.5mm.Rotor is made up of rotor core and rotor winding, rotor core forms with the silicon steel plate stacking of 0.5mm, and the rotor winding adopts the cage type winding, promptly inserts a copper sliver in each groove of rotor core, each couples together sliver with a copper ring copper sliver diameter 5.3mm at copper sliver two ends.During assembling with the end cap of phase asynchronous electric rotating machine 5 with an end that is threaded in motor housing, in the motor housing of then stator being packed into, again rotor is inserted in the stator center hole, at last at the other end of motor housing with the end cap that is threaded.
The operating principle and the course of work of the Rodless oil extraction system that the summary underground rotation motor drives help understanding the present invention.
Consult Fig. 1.Pressure equaliser plays the effect of equilibrium pressure difference, guarantees the pressure balance that system is inside and outside.Phase asynchronous electric rotating machine 5 rotatablely moves by the cable power supply generation at the middle part of system.Machinery conversion mechanism is converted to rotatablely moving of motor shaft 6 by the nut 8 that is connected with motor shaft 6 linear reciprocating motion of leading screw 10 in the system bottom.Nut 8 is connected with shaft coupling 7 and rotates, and leading screw 10 is done straight reciprocating motion.Leading screw 10 is done the oil pump plunger piston reciprocating motion that straight reciprocating motion can drive the bottom, and the liquid pumping on stratum is come out.Leading screw 10 and motor shaft 6 all design centre bore, and down-hole liquid can enter in the oil pipe of top by the centre bore of leading screw 10 and motor shaft 6, arrives ground at last.
During up stroke, phase asynchronous electric rotating machine 5 is rotated in the forward, and drives nut 8 by shaft coupling 7 and is rotated in the forward, and leading screw 10 moves upward, and the oil pump plunger piston that leading screw 10 bottoms connect is up, and standing valve is opened, travelling valve cuts out, and finishes the suction process of oil well pump; During down stroke, phase asynchronous electric rotating machine 5 reverse rotations drive nut 8 reverse rotations by shaft coupling 7, and leading screw 10 moves downward, and oil pump plunger piston is descending, and standing valve cuts out, travelling valve is opened, and finishes the discharge process of oil well pump.
Beneficial effect of the present invention: the Rodless oil extraction system that underground rotation motor of the present invention drives, electric rotating machine is placed the down-hole, by leading screw rotatablely moving of motor is converted to straight reciprocating motion, realize the lifting oil pumping thereby drive oil well pump.System compares with the oil pumper sucker rod pumping, has cancelled sucker rod, has fundamentally eliminated the side-abrasion of rod string problem; Realized " zero transmission " of motor shaft, eliminated loss of plunger stroke, helped improving oil well pump pump efficiency and system effectiveness to oil pump plunger piston; Use digital control scheme and adjust operational factor, reduced later stage operation expense and labor strength; Do not need oil pumper, well head floor space few.
Description of drawings
Fig. 1 is the Rodless oil extraction system structural profile schematic diagram that underground rotation motor of the present invention drives.
Among the figure, 1. upper isolating ring, 2. spiracle, 3. dummy piston is 4. gone up cylinder barrel, 5. phase asynchronous electric rotating machine, 6. motor shaft, 7. shaft coupling, 8. nut 9. descends cylinder barrel, 10. leading screw, 11. lower end caps, 12. sealing rings.
The specific embodiment
Embodiment 1: the Rodless oil extraction system that drives with the underground rotation motor of external diameter 108mm, a length 6.7m is an example, and the present invention is described in further detail.
Consult Fig. 1.The Rodless oil extraction system that underground rotation motor of the present invention drives mainly is made up of pressure equaliser, phase asynchronous electric rotating machine 5, machinery conversion mechanism, following cylinder barrel 9 and lower end cap 11.
Pressure equaliser comprises upper isolating ring 1, spiracle 2, dummy piston 3 and last cylinder barrel 4, last cylinder barrel 1 external diameter 108mm, internal diameter 98mm, the external screw thread of M108 * 1.5 is arranged at last cylinder barrel 4 tops, (end is the internal thread of M108 * 1.5 by a combination coupling, one end is the 27/8TBG internal thread) be connected with 27/8 plain end oil well pipe, have the spiracle of 2 diameter 10mm on last cylinder barrel 4 walls, there is a dummy piston 3 last cylinder barrel 4 inside, the endoporus of dummy piston 3 is 30mm, dummy piston 3 is enclosed within on the outer wall of motor shaft 6, dummy piston 3 tops are communicated with the oil jacket annular space with space between the upper isolating ring 1, dummy piston 3 bottoms and phase asynchronous electric rotating machine 5 and machinery conversion mechanism internal communication, when phase asynchronous electric rotating machine 5 and machinery conversion mechanism internal pressure and annular pressure imbalance, dummy piston 3 motion automatically makes pressure reach balance.
Mutually asynchronous electric rotating machine 5 is made up of end cap, motor housing, stator and rotor four parts, motor length overall 2.2m, motor housing external diameter 108mm, internal diameter 98mm.Stator is made up of stator core and stator winding, and stator core forms with the silicon steel plate stacking of 0.5mm, and the stator winding line is the circular copper wire of diameter 2.5mm.Rotor is made up of rotor core and rotor winding, rotor core forms with the silicon steel plate stacking of 0.5mm, and the rotor winding adopts the cage type winding, promptly inserts a copper sliver in each groove of rotor core, each couples together sliver with a copper ring copper sliver diameter 5.3mm at copper sliver two ends.During assembling with phase asynchronous electric rotating machine 5 end caps with an end that is threaded in motor housing, in the motor housing of then stator being packed into, again rotor is inserted in the stator center hole, at last at the other end of motor housing with the end cap that is threaded.Those skilled in the art can finish design and make according to the structure of mutually asynchronous electric rotating machine 5.Provide the Electromagnetic Design parameter of phase asynchronous electric rotating machine 5 below, offer those skilled in the art's reference.See Table 1, table 2.
The phase asynchronous electric rotating machine electromagnetic parameter design of table 1 table 1
The phase asynchronous electric rotating machine electromagnetic parameter design of table 2 table 2
Adopt the screw thread of M98 * 1.5 to be connected in the lower end of last cylinder barrel 4 with a phase asynchronous electric rotating machine 5.Motor shaft 6 external diameters are that 30mm, length are 2955mm, and there is axially extending bore at motor shaft 6 centers, and the aperture is 16mm.The lower end of phase asynchronous electric rotating machine 5 adopts the screw thread of M98 * 1.5 to be connected following cylinder barrel 9 external diameter 108mm, internal diameter 98mm, length 3870mm with following cylinder barrel 9.The lower end of following cylinder barrel 9 is fixed with lower end cap 11.Machinery conversion mechanism is in following cylinder barrel 9, and machinery conversion mechanism comprises shaft coupling 7, nut 8 and leading screw 10.Shaft coupling 7 upper ends and phase asynchronous electric rotating machine 5 are fixing, and the top of lower end and nut 8 is fixed.Nut 8 adopts rectangular thread to cooperate pitch 10mm with leading screw 10.Nut 8 external diameter 75mm, length 400mm.Leading screw 10 nominal diameters are 50mm, length 1200mm, diameter of bore 16mm.Lower end cap 11 centre bores are passed in the lower end of leading screw 10.Between leading screw 10 and lower end cap 11, three seals circle 12 is arranged.
There is external screw thread lower end at lower end cap 11, can be connected with the shell of bottom oil well pump; At the lower end of leading screw 11 external screw thread, can be connected with the plunger of bottom oil well pump.
Claims (3)
1. the Rodless oil extraction system that drives of a underground rotation motor, mainly by pressure equaliser, phase asynchronous electric rotating machine (5), machinery conversion mechanism, following cylinder barrel (9) and lower end cap (11) are formed, it is characterized in that: pressure equaliser comprises upper isolating ring (1), spiracle (2), dummy piston (3) and last cylinder barrel (4), screw thread is arranged at last cylinder barrel (4) top, have spiracle (2) on the upper cylinder half barrel, dummy piston (2) is arranged in last cylinder barrel (4), dummy piston (2) is enclosed within on the outer wall of motor shaft (6), the lower end of last cylinder barrel (4) is fixed with phase asynchronous electric rotating machine (5), there is axially extending bore at motor shaft (6) center of phase asynchronous electric rotating machine (5), the motor shaft upper end extends to more than the upper isolating ring, be fixed with cylinder barrel (9) down in the lower end of phase asynchronous electric rotating machine (5), the lower end of following cylinder barrel (9) is fixed with lower end cap (11), machinery conversion mechanism is in following cylinder barrel (9), machinery conversion mechanism comprises shaft coupling (7), nut (8) and leading screw (10), shaft coupling (7) upper end is connected with motor shaft (6) lower end, shaft coupling (7) lower end is connected with nut (8) upper end, nut (8) adopts threaded engagement with leading screw (10), and lower end cap (11) centre bore is passed in the lower end of leading screw (10).
2. the Rodless oil extraction system that underground rotation motor according to claim 1 drives is characterized in that: between leading screw (10) and lower end cap (11) sealing ring (12) is arranged.
3. the Rodless oil extraction system that underground rotation motor according to claim 1 and 2 drives, it is characterized in that: described phase asynchronous electric rotating machine 5 is made up of end cap, motor housing, stator and rotor four parts, motor length overall 2.2m, motor housing external diameter 108mm, internal diameter 98mm; Stator is made up of stator core and stator winding, and stator core forms with the silicon steel plate stacking of 0.5mm, and the stator winding line is the circular copper wire of diameter 2.5mm; Rotor is made up of rotor core and rotor winding, rotor core forms with the silicon steel plate stacking of 0.5mm, and the rotor winding adopts the cage type winding, promptly inserts a copper sliver in each groove of rotor core, each couples together sliver with a copper ring copper sliver diameter 5.3mm at copper sliver two ends; During assembling with the end cap of phase asynchronous electric rotating machine 5 with an end that is threaded in motor housing, in the motor housing of then stator being packed into, again rotor is inserted in the stator center hole, at last at the other end of motor housing with the end cap that is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102371452A CN101701515B (en) | 2009-11-11 | 2009-11-11 | Rodless oil extraction system driven by underground rotation motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102371452A CN101701515B (en) | 2009-11-11 | 2009-11-11 | Rodless oil extraction system driven by underground rotation motor |
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| CN101701515A true CN101701515A (en) | 2010-05-05 |
| CN101701515B CN101701515B (en) | 2012-07-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403832A (en) * | 2011-11-10 | 2012-04-04 | 大连永明数控机床有限公司 | Rectilinear motion control device of motor |
| CN107152506A (en) * | 2017-06-06 | 2017-09-12 | 北京航空航天大学 | Pressure self-balancing formula electromechanical servo acting device under a kind of hyperbaric environment |
| CN109736797A (en) * | 2019-01-17 | 2019-05-10 | 西南石油大学 | A kind of intelligence flabellum rack-and-pinion supporting leg suction-type sampling device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3022600A1 (en) * | 1979-06-21 | 1981-01-29 | Kobe Inc | DEVICE AND METHOD FOR PUMPING A HOLE |
| CN2599279Y (en) * | 2003-02-27 | 2004-01-14 | 沈阳市新城石油机械厂 | Rodless automatic oil well pump for deep well |
| CN2642992Y (en) * | 2003-08-22 | 2004-09-22 | 胡秀忠 | Oil extraction device of energy-saving plunger type submersible electric pump |
| CN2779107Y (en) * | 2005-02-06 | 2006-05-10 | 马宝忠 | Motor top arranged type rod-less oil-well pump |
| CN101008381A (en) * | 2006-01-25 | 2007-08-01 | 李文才 | Pumping system of rodless piston pump |
| CN201546684U (en) * | 2009-11-11 | 2010-08-11 | 中国石油天然气股份有限公司 | Rodless oil production system driven by downhole rotating motor |
-
2009
- 2009-11-11 CN CN2009102371452A patent/CN101701515B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403832A (en) * | 2011-11-10 | 2012-04-04 | 大连永明数控机床有限公司 | Rectilinear motion control device of motor |
| CN107152506A (en) * | 2017-06-06 | 2017-09-12 | 北京航空航天大学 | Pressure self-balancing formula electromechanical servo acting device under a kind of hyperbaric environment |
| CN109736797A (en) * | 2019-01-17 | 2019-05-10 | 西南石油大学 | A kind of intelligence flabellum rack-and-pinion supporting leg suction-type sampling device |
| CN109736797B (en) * | 2019-01-17 | 2022-01-28 | 西南石油大学 | Intelligent fan blade gear rack landing leg suction type sampler |
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| Publication number | Publication date |
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| CN101701515B (en) | 2012-07-18 |
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