The present invention relates to a wellbore pumping system submerged into a wellbore for unloading liquid from a wellbore comprising well fluid, such as gas, having a wellbore pressure, comprising a pump having an inlet and an outlet, a tubing fluidly connected with the outlet of the pump, and a dri
The present invention relates to a wellbore pumping system submerged into a wellbore for unloading liquid from a wellbore comprising well fluid, such as gas, having a wellbore pressure, comprising a pump having an inlet and an outlet, a tubing fluidly connected with the outlet of the pump, and a driving unit connected with and powered by a cable, such as a wireline, and having a rotatable drive shaft for driving the pump, wherein the pump is a reciprocating pump comprising at least one pumping unit having a first moving member displaceable in a housing for sucking well fluid into and out of a first chamber. Furthermore, the invention relates to a wellbore pumping method.
대표청구항▼
1. A wellbore pumping system (1) submersible into a wellbore for unloading liquid (13) from a wellbore comprising well fluid (14), such as gas, having a wellbore pressure, comprising: a pump (2) having an inlet (3) and an outlet (4),a tubing (5) fluidly connected with the outlet of the pump, anda dr
1. A wellbore pumping system (1) submersible into a wellbore for unloading liquid (13) from a wellbore comprising well fluid (14), such as gas, having a wellbore pressure, comprising: a pump (2) having an inlet (3) and an outlet (4),a tubing (5) fluidly connected with the outlet of the pump, anda driving unit (6) connected with and powered by a cable (7), and having a rotatable drive shaft (26) for driving the pump,wherein the pump is a reciprocating pump comprising at least one pumping unit (8) having a first moving member (9) displaceable in a housing (10) for sucking well fluid into and out of a first chamber (11),the system further comprising a compensator device (22) comprising a compensator chamber (17) having a compensator moving member (18) displaceable in the compensator chamber and dividing the compensator chamber into a first chamber section (19) and a second chamber section (20), wherein the first chamber section is in fluid communication with the well fluid. 2. A wellbore pumping system according to claim 1, wherein the first moving member divides the housing into the first chamber and a second chamber (12). 3. A wellbore pumping system according to claim 2, wherein the second chamber of the reciprocating pump is in fluid communication with the second chamber section. 4. A wellbore pumping system according to claim 1, wherein the system comprises a one-way valve (15) arranged between the inlet and the first chamber, and a second one-way valve (16) arranged between the outlet and the first chamber, enabling liquid to be sucked into the first chamber and subsequently forced out through the second one-way valve by displacing the moving member. 5. A wellbore pumping system according to claim 1, wherein the compensator moving member is a piston. 6. A wellbore pumping system according to claim 1, wherein the compensator device comprises at least one flexible element (34) arranged in the first chamber section forcing the compensator moving member towards the pump. 7. A wellbore pumping system according to claim 1, wherein the compensator moving member has a circumferential sealing means (36). 8. A wellbore pumping system according to claim 1, wherein the system has a system housing (37) having openings (24) into which a screen or filter (30) is arranged, preventing scales or other particles from entering the compensator device (22) or the pump (2) and deteriorating their function. 9. A wellbore pumping system according claim 2, wherein the first chamber is filled with liquid during pumping of the liquid, such as water, and the second chamber is filled with a second liquid. 10. A wellbore pumping system according to claim 9, wherein the second liquid is a dielectric fluid. 11. A wellbore pumping system according to claim 1, wherein the tubing is made from a non-metallic material. 12. A wellbore pumping system according to claim 9, wherein the pumping unit is surrounded by a cavity (21) filled with the second liquid and is in fluid communication with the second chamber of the pumping unit. 13. A wellbore pumping system according to claim 1, wherein the pump has a plurality of pumping units, and wherein the moving members are arranged so that when one moving member moves in one direction, another moving member moves in an opposite direction. 14. A wellbore pumping system according to claim 1, wherein a first moving member displaces a first volume (V1) of liquid when moved in one direction, and a second moving member displaces a second volume (V2) of liquid when moved in another direction opposite the first direction, wherein the first and the second volumes are substantially equal in size. 15. A wellbore pumping system according to claim 1, further comprising a control unit (32) for activating the pump. 16. A wellbore pumping system according to claim 15, wherein the control unit has a measuring unit (33) for measuring the power used by the driving unit for driving the pump. 17. A wellbore pumping system according to claim 16, wherein the pump is activated when a predetermined period of time has passed since the last stop of the pump. 18. A wellbore pumping system according to claim 1, wherein the driving unit comprises a starting means which, during activation of the pump, reduces a torque delivered to the drive shaft driving the pump. 19. A wellbore pumping system according to claim 1, wherein the drive shaft is connected with rotating cams (27) connected with the first moving member producing reciprocating motion. 20. A wellbore pumping system according to claim 1, wherein the drive shaft drives several pumps. 21. A wellbore pumping system according to claim 1, wherein the tubing has a cross-sectional width (wt) being less than 25% of an inner diameter (Dc) of the wellbore or a casing in the wellbore. 22. A wellbore pumping system according to claim 1, wherein the cable comprises a wireline. 23. A wellbore pumping system according to claim 21, wherein the cross-sectional width is less than 10% of the inner diameter (Dc) of the wellbore or the casing in the wellbore. 24. A wellbore pumping system according to claim 21, wherein the cross-sectional width is less than 10% of the inner diameter (Dc) of the wellbore or the casing in the wellbore. 25. A wellbore pumping system according to claim 10, wherein the second liquid is a dielectric fluid, such as mineral oil, castor oil, Polychlorinated biphenyls (PCBs), etc. 26. A method comprising the steps of: entering a wellbore pumping system according to claim 1,activating the pump,measuring the power used by the driving unit for driving the pump,determining whether the power is higher than a predetermined value, andstopping the pump when the power is lower than the predetermined value. 27. A method according to claim 26, further comprising the step of: reactivating the pump after a predetermined period of time.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (5)
Walling John B. (5613 Trail Lake Dr. Fort Worth TX 76133), Flexible tubing production system for well installation.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.