CN112943171A - Cable-throwing type electric submersible screw pump and implementation method thereof - Google Patents
Cable-throwing type electric submersible screw pump and implementation method thereof Download PDFInfo
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- CN112943171A CN112943171A CN202110266711.3A CN202110266711A CN112943171A CN 112943171 A CN112943171 A CN 112943171A CN 202110266711 A CN202110266711 A CN 202110266711A CN 112943171 A CN112943171 A CN 112943171A
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- screw pump
- cable
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- tubing
- casing
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004873 anchoring Methods 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 23
- 230000001012 protector Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 26
- 239000012530 fluid Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a screw pump, in particular to a cable-throwing type electric submersible screw pump and an implementation method thereof. The method comprises the following steps that firstly, initial construction comprises a wellhead and a casing, the power unit and the anchoring setting unit form a tool string as a whole and descend to the target depth of the casing, and at the moment, a casing running mode is adopted; when the first step further comprises a tubing anchor, a packer and a tubing, the tool string is lowered to the target depth of the casing instead of the target depth of the tubing to obtain the tubing string, the tubing string connected with the tubing anchor and the packer is lowered into the casing, the fixed combination of the casing and the tubing is realized by pressing, setting and anchoring at the wellhead, and the tubing is lowered. Step two, controlling the anchoring slips and the setting rubber cylinder to perform anchoring and setting; and step three, driving the screw pump, enabling oil production liquid to flow in from the liquid inlet and flow out from the liquid outlet, and lifting to a wellhead.
Description
Technical Field
The invention relates to a screw pump, in particular to a cable-throwing type electric submersible screw pump and an implementation method thereof.
Background
For example, the publication number is CN112253061A a layered oil production device with a power line shared by double electric submersible pumps. The technical scheme is as follows: a lower layer starting switch and a lower layer electric submersible pump are arranged below the lower layer cable-passing packer, and an upper layer electric submersible pump, an upper layer starting switch and a phase compensator are arranged between the lower layer cable-passing packer and the upper layer cable-passing packer; the second power cable of the lower electric submersible pump passes through the cable packer along the lower layer and is upwards connected in parallel to the first power cable of the upper electric submersible pump, the lower starting switch control line of the lower electric submersible pump passes through the cable packer along the lower layer and the cable packer along the upper layer, and the lower starting switch control line and the upper starting switch control line pass through the threading hole of the big four-way of the well head. The beneficial effects are that: the structure of the underground power cable is simplified, the problem that two groups of power cables cannot penetrate through an eccentric-structure cable-passing packer is solved, the purpose that two electric submersible pumps are used for underground layered oil extraction is achieved, an oil extraction layer is clearer, production allocation is achieved through electric control, and efficient oil extraction is achieved; but the device is inconvenient to use.
Disclosure of Invention
The invention aims to provide a cable-throwing type electric submersible screw pump and an implementation method thereof, which can save time and labor.
The purpose of the invention is realized by the following technical scheme:
cable dropping type electric submersible screw pump comprises a power unit, wherein the power unit comprises a screw pump, an oil-gas separator, a liquid inlet, a flexible shaft and a submersible motor, the oil-gas separator is installed at the lower end of the screw pump, the liquid inlet is communicated with the oil-gas separator, the flexible shaft is installed below the oil-gas separator, and the submersible motor is installed below the flexible shaft.
The power unit further comprises a motor protector, and the motor protector is mounted on the upper portion of the submersible motor.
The submersible motor is provided with a speed reducer.
The cable-throwing electric submersible screw pump further comprises an anchoring setting unit, and the anchoring setting unit can enable the power unit to be fixed and sealed underground.
The anchoring and setting unit comprises a shell, a liquid outlet, an anchoring slip, a setting rubber cylinder and a driving motor, wherein the driving motor, the anchoring slip and the setting rubber cylinder are sequentially installed on the shell from top to bottom, the shell is provided with the liquid outlet, the liquid outlet is located between the anchoring slip and the driving motor, and the lower portion of the shell is installed and communicated with the screw pump.
The cable-throwing type electric submersible screw pump further comprises an electric control cabinet and a communication cable, wherein the electric control cabinet and the communication cable are used for power supply and communication control of the driving motor and the submersible motor.
And a pressure sensor I is arranged in the anchoring setting unit.
And a pressure sensor II is arranged in the power unit.
The implementation method of the cable-launched electric submersible screw pump comprises the following steps:
the method comprises the following steps that firstly, initial construction comprises a wellhead and a casing, and the power unit and the anchoring setting unit form a tool string as a whole and descend to the target depth of the casing;
step two, supplying power to a driving motor through an electric control cabinet and a communication cable, and controlling an anchoring slip and a setting rubber cylinder to be anchored and set;
and step three, supplying power to the submersible motor through the electric control cabinet and the communication cable to drive the screw pump, so that oil reservoir production liquid flows in from the liquid inlet and flows out from the liquid outlet and is lifted to the wellhead.
The first step further comprises a tubing anchor, a packer and a tubing, the tool string is lowered to the target depth of the casing instead of the target depth of the tubing to obtain the tubing string, the tubing string connected with the tubing anchor and the packer is lowered into the casing, and the casing and the tubing are fixedly combined through wellhead pressing setting and anchoring.
The cable-throwing type electric submersible screw pump has the beneficial effects that:
the cable is adopted to put in the electric submersible screw pump and the matched tools, so that the lifting and lowering through an oil pipe are not needed, the time and the labor are saved, the construction cost is low, and the maintenance is convenient; the tool string of the electric submersible pump integrates an anchoring and setting mechanism, power supply and action control are carried out on a driving motor through a cable, the tool string can realize fixation and packing in an oil pipe or a sleeve pipe, and measures such as ground pressing are not needed; the electric control driving mode is adopted, repeated anchoring and setting actions in the well can be realized, so that the lowering depth of the submersible pump can be changed by only lifting or lowering the cable according to production requirements without oil pipe operation; a pressure sensor and a temperature sensor are arranged in the tool, and downhole parameters can be uploaded to the ground in real time through a cable and used as a basis for monitoring the working fluid level.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the overall structure of a cable-launched electric submersible screw pump according to the present invention;
FIG. 2 is a schematic view of the tubing running mode of the present invention;
in the figure: a housing 1; a liquid outlet 101; anchoring slips 102; setting the rubber cylinder 103; a drive motor 104; a screw pump 2; an oil-gas separator 201; a liquid inlet 202; a flexible shaft 203; a motor protector 204; a submersible motor 205; an electric control cabinet 3; a communication cable 4; a wellhead 5; a tubing anchor 6; a packer 7; a sleeve 8; an oil pipe 9; a pipe string 10.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in the figure, cable throwing type electric submersible screw pump, including power unit, power unit includes screw pump 2, oil and gas separator 201, liquid inlet 202, flexible axle 203 and latent oily motor 205, oil and gas separator 201 is installed to the lower extreme of screw pump 2, and last intercommunication of oil and gas separator 201 has liquid inlet 202, and flexible axle 203 is installed in the below of oil and gas separator 201, and latent oily motor 205 is installed in the below of flexible axle 203.
The second embodiment is as follows:
as shown, the power unit further includes a motor protector 204, and the motor protector 204 is installed on the upper portion of the submersible motor 205.
The third concrete implementation mode:
as shown, the submersible motor 205 is equipped with a speed reducer. In the power unit, from bottom to top included submersible motor 205 in proper order and contained the reduction gear, motor protector 204, flexible axle 203, inlet 202, screw pump, passed through communication cable 4 that the upper portion went down and supplied power and control for submersible motor 205, submersible motor 205 axle rotation drives screw pump 2 inner rotor and rotates, inhales crude oil from inlet 202, reserves by upper end product liquid export 101 through the internal flow channel, and the product liquid lifts to well head 5 under screw pump 2 power effect, realizes extracting.
The fourth concrete implementation mode:
as shown in the figure, the cable-launched electric submersible screw pump further comprises an anchoring setting unit, wherein the anchoring setting unit can fix the power unit underground and seal the liquid inlet 202 and the liquid outlet 101. The working principle of the cable-launched electric submersible screw pump system mainly comprises an anchoring unit, a setting unit and a power unit. The anchoring and setting units realize the fixation and packing of the equipment in the underground, and the power unit is used for mining and lifting.
The fifth concrete implementation mode:
as shown in the figure, the anchoring setting unit comprises a shell 1, a liquid outlet 101, an anchoring slip 102, a setting rubber cylinder 103 and a driving motor 104, wherein the driving motor 104, the anchoring slip 102 and the setting rubber cylinder 103 are sequentially installed on the shell 1 from top to bottom, the liquid outlet 101 is formed in the shell 1, the liquid outlet 101 is located between the anchoring slip 102 and the driving motor 104, and the lower portion of the shell 1 is installed and communicated with the screw pump 2. The anchoring and setting unit comprises a driving motor 104, an anchoring slip 102, a setting rubber cylinder 103 and an internal screw nut driving mechanism, and realizes power supply and communication control of the ground electric control cabinet 3 and the downhole driving motor 104 through a communication cable 4. The driving motor 104 rotates forwards, and the anchoring slips 102 and the setting rubber barrel 103 are driven to expand through the lead screw nut mechanism. When the tool string slip is anchored and the rubber sleeve is expanded on the inner wall of the oil pipe 9 when the tool string slip is thrown in the oil pipe 9, and when the sleeve 8 is thrown in, the tool string slip is anchored and the rubber sleeve is expanded in the sleeve 8, so that the liquid inlet 202 and the liquid outlet 101 are separated. When the tool needs to be stopped and maintained, the driving motor 104 rotates reversely to withdraw the slips and the rubber cylinder, and the tool string is lifted out of the wellhead 5 along with the communication cable 4; the tubular string 10 may be a commingled or a separate production tubular string.
The sixth specific implementation mode:
as shown in the figure, the cable-launched electric submersible screw pump further comprises an electric control cabinet 3 and a communication cable 4, wherein the electric control cabinet 3 and the communication cable 4 are used for power supply and communication control of the driving motor 104 and the submersible motor 205.
The seventh embodiment:
as shown in the figure, a pressure sensor I is arranged in the anchoring setting unit.
The specific implementation mode is eight:
as shown in the figure, a pressure sensor II is arranged in the power unit. And the pressure sensor I and the pressure sensor II are used for jointly detecting and sealing and monitoring the working fluid level.
The specific implementation method nine:
as shown in the figure, the implementation method of the cable-launched electric submersible screw pump comprises the following steps:
the method comprises the following steps that firstly, initial construction comprises a wellhead 5 and a casing 8, and the power unit and the anchoring setting unit form a tool string as a whole and descend to the target depth of the casing 8; the initial construction preparation is a casing running mode;
step two, supplying power to a driving motor 104 through an electric control cabinet 3 and a communication cable 4, and controlling an anchoring slip 102 and a setting rubber cylinder 103 to be anchored and set;
and step three, supplying power to the submersible motor 205 through the electric control cabinet 3 and the communication cable 4 to drive the screw pump 2, so that oil reservoir production liquid flows in from the liquid inlet 202 and flows out from the liquid outlet 101 and is lifted to the wellhead 5.
The detailed implementation mode is ten:
as shown in the figure, the first step further comprises a tubing anchor 6, a packer 7 and a tubing 9, the target depth of the casing 8 is replaced by the target depth of the casing 9, the tubing string is obtained, the tubing string connected with the tubing anchor 6 and the packer 7 is lowered into the casing 8, and the casing 8 and the tubing 9 are fixedly combined through the wellhead 5 for pressure setting and anchoring. At this time, the initial construction preparation is changed to an oil pipe lowering mode.
In the attached drawings, the oil pipe 9 is put in, namely, a tool string is put into the oil pipe 9 to obtain an oil pipe string, then the oil pipe string is put into the casing 8, and the casing 8 and the oil pipe 9 are fixedly combined by pressing, setting and anchoring through the wellhead 5; compared with the running mode of the oil pipe 9, the running mode of the casing 8 has the advantages that the oil pipe anchor 6 and the packer 7 are omitted, the well mouth 5 is not required to be pressed, set and anchored, and the tool string is directly arranged in the casing 8.
When the tool string is put in, the anchoring and setting units and the power unit are integrated to form a cable-throwing type electric submersible pump tool string, and the tool string is put down to the target depth of a sleeve 8 or an oil pipe 9 through a communication cable 4 which contains multiple cores and is used for alternating current power supply and communication control during construction.
The anchoring/setting driving motor 104 is controlled to rotate forwards through a ground control box, namely the electric control cabinet 3, anchoring and setting are completed, and online seal checking can be performed through a built-in pressure sensor. The cable passes through the sealing device through the wellhead 5 to realize sealing, so that well fluid is prevented from overflowing the wellhead.
During production, the submersible motor 205 is powered through the ground control box to drive the screw pump 2, oil production liquid flows in from the liquid inlet 202, flows out from the liquid outlet 101 and is lifted to the wellhead 5. In the process of exploitation, the working fluid level can be monitored in real time through the built-in pressure sensor and used as reference data, and the rotating speed of the submersible screw pump 2 or the tool string descending depth can be adjusted according to needs.
When the well is stopped for maintenance, the driving motor 104 is controlled by the ground control cabinet to be unsealed and anchored, and the communication cable 4 is lifted up to lift the tool out of the well mouth 5.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.
Claims (10)
1. Cable dropping type electric submersible screw pump, including power pack, its characterized in that: the power unit comprises a screw pump (2), an oil-gas separator (201), a liquid inlet (202), a flexible shaft (203) and an oil-submersible motor (205), wherein the oil-gas separator (201) is installed at the lower end of the screw pump (2), the liquid inlet (202) is communicated with the oil-gas separator (201), the flexible shaft (203) is installed below the oil-gas separator (201), and the oil-submersible motor (205) is installed below the flexible shaft (203).
2. The cable launched electric submersible screw pump of claim 1, wherein: the power unit also comprises a motor protector (204), and the motor protector (204) is arranged on the upper part of the submersible motor (205).
3. The cable-launched electric submersible screw pump according to claim 1 or 2, characterized in that: the submersible motor (205) is equipped with a speed reducer.
4. The cable launched electric submersible screw pump of claim 3, wherein: the cable-throwing electric submersible screw pump further comprises an anchoring setting unit, and the anchoring setting unit can enable the power unit to be fixed and sealed underground.
5. The cable launched electric submersible screw pump of claim 4, wherein: the anchoring and setting unit comprises a shell (1), a liquid outlet (101), an anchoring slip (102), a setting rubber cylinder (103) and a driving motor (104), wherein the driving motor (104), the anchoring slip (102), the setting rubber cylinder (103) and a screw nut driving mechanism are sequentially installed on the shell (1) from top to bottom, the liquid outlet (101) is formed in the shell (1), the liquid outlet (101) is located between the anchoring slip (102) and the driving motor (104), the lower portion of the shell (1) is installed and communicated with a screw pump (2), and the screw nut driving mechanism is used for driving the anchoring slip (102) and the setting rubber cylinder (103) to expand.
6. The cable launched electric submersible screw pump of claim 5, wherein: the cable-launched electric submersible screw pump further comprises an electric control cabinet (3) and a communication cable (4), wherein the electric control cabinet (3) and the communication cable (4) are used for power supply and communication control of the driving motor (104) and the submersible motor (205).
7. The cable-launched electric submersible screw pump according to any one of claims 4 to 6, wherein: and a pressure sensor I is arranged in the anchoring setting unit.
8. The cable launched electric submersible screw pump of claim 7, wherein: and a pressure sensor II is arranged in the power unit.
9. The method of claim 8, wherein the method comprises the steps of:
the method comprises the following steps that firstly, initial construction comprises a well head (5) and a casing (8), and the power unit and the anchoring setting unit form a tool string as a whole and are lowered to the target depth of the casing (8);
step two, supplying power to a driving motor (104) through an electric control cabinet (3) and a communication cable (4) for controlling an anchoring slip (102) and a setting rubber cylinder (103) to be anchored and set;
and thirdly, supplying power to the submersible motor (205) through the electric control cabinet (3) and the communication cable (4) to drive the screw pump (2), wherein oil reservoir production liquid flows in from the liquid inlet (202) and flows out from the liquid outlet (101) and is lifted to the wellhead (5).
10. The method of claim 9, wherein the pump comprises: the first step further comprises a tubing anchor (6), a packer (7) and a tubing (9), the target depth of the tool string lowered to the casing (8) is replaced by the target depth of the tool string lowered into the tubing (9) to obtain the tubing string, the tubing string connected with the tubing anchor (6) and the packer (7) is lowered into the casing (8), and the casing (8) and the tubing (9) are fixedly combined through well head (5) pressing, setting and anchoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110266711.3A CN112943171A (en) | 2021-03-11 | 2021-03-11 | Cable-throwing type electric submersible screw pump and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110266711.3A CN112943171A (en) | 2021-03-11 | 2021-03-11 | Cable-throwing type electric submersible screw pump and implementation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112943171A true CN112943171A (en) | 2021-06-11 |
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|---|---|---|---|
| CN202110266711.3A Pending CN112943171A (en) | 2021-03-11 | 2021-03-11 | Cable-throwing type electric submersible screw pump and implementation method thereof |
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| CN (1) | CN112943171A (en) |
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|---|---|---|---|---|
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2021
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Application publication date: 20210611 |