CN113756750B - Balanced liquid extracting device of spiral pump in horizontal well pipe - Google Patents
Balanced liquid extracting device of spiral pump in horizontal well pipe Download PDFInfo
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- CN113756750B CN113756750B CN202010493642.5A CN202010493642A CN113756750B CN 113756750 B CN113756750 B CN 113756750B CN 202010493642 A CN202010493642 A CN 202010493642A CN 113756750 B CN113756750 B CN 113756750B
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- 239000007788 liquid Substances 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 238000004873 anchoring Methods 0.000 claims abstract description 17
- 238000011010 flushing procedure Methods 0.000 claims abstract description 11
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 13
- 230000001012 protector Effects 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 239000004576 sand Substances 0.000 abstract description 13
- 238000001914 filtration Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an equalizing liquid extracting device of a spiral pump in a horizontal well pipe, which mainly comprises an oil pipe, a cable passing packer, an electric submersible pump unit, a casing centralizer, a cable, a suspension centralizer, a well completion sieve tube, a centralizer, a driving motor, an anti-rotation anchoring mechanism, a spiral pump body, a well flushing valve and a guide shoe. Wherein: the electric submersible pump unit is provided with a protective sleeve for the conventional electric submersible pump assembly to improve the bearing load; the screw pump is an independent inner pipe tool, is arranged at a designated position of a production section of the horizontal well, is connected with the upper electric submersible pump through an oil pipe, and shares an electric power transmission and ground control system. The underground motor of the screw pump drives the screw impeller to push the liquid in the pipe from the downstream to the upstream, so that the production pressure difference at two ends of the sand filtering pipe can be balanced, the inflow profile balance of a production section is improved, the liquid extracting effect is achieved, and the purpose of fully exerting the liquid extracting advantage of the horizontal well is achieved.
Description
Technical Field
The invention relates to a horizontal well oil extraction device in the field of oil exploitation, in particular to a balanced liquid extraction device of a spiral pump in a horizontal well pipe.
Background
Horizontal wells are currently commonly used in victory fields to produce high water reservoirs, and many single reservoirs exhibit strong bottom water reservoir development characteristics. In the exploitation process, the horizontal well is influenced by heel-toe effect and oil layer heterogeneity, so that the water ridge is unevenly raised, the oil layer cannot supply liquid evenly to the horizontal well, and the problems of short water breakthrough time of the horizontal well, high water content of produced liquid and the like are caused. In order to solve the problems, expert scholars in related fields at home and abroad develop water shutoff and water control technologies of a plurality of horizontal wells, and the water shutoff and water control technologies are mainly divided into two main types at present, namely a chemical method and a mechanical method.
The chemical method can be classified into reservoir transformation category, and the implementation method is that water shutoff agents of specified types are injected into a water producing layer section to block pores and micro cracks of a rock matrix and prevent formation water from being produced. The chemical method has the following problems: only when the general injection condition (the permeability of the target plugging interval is obviously higher than that of other intervals) is mature, the water plugging construction is simple and convenient, the effect is good, otherwise, the packer is required to be used for accurate positioning, and the construction difficulty and the cost are obviously improved; the risk of contamination of the reservoir by chemical methods is high and irreversible after contamination.
The mechanical method is mainly embodied as various horizontal well water control well completion devices, and the flow-rate excessive layer section is limited by arranging a specific type of flow channel to generate proper additional pressure drop so as to adjust the production fluid section of the production section. There are three types of water control completion devices that are widely used: the technology of the inflow controller is most widely applied, is firstly applied to Troll gas fields in North sea of Norway in the early 90 th century, is primarily applied in China in the last decade, has a large number of novel products in China, and has various reports, and typical related documents include: patents 201410252818.2, 201410501115.9, 201410638607.2, 201420309993.6, 201610890102.4, and 201810538577.6. The water control completion technology has the following problems: the method is not suitable for a low-liquid-yield horizontal well commonly existing in a winning oil field at the cost of sacrificing the productivity of a single well.
The Chinese patent application number 201410501693.2 makes an improvement on the water control mechanism level aiming at the existing water control well completion technology, and proposes a spiral pump sand filtering pipe, which comprises a central pipe, a thin-wall pipe, a sand filtering net material, a plurality of through holes, at least two groups of bearing brackets and bearing assemblies, wherein the thin-wall pipe is sealed outside the central pipe, the sand filtering net material is clamped between the central pipe and the central pipe, the walls of the central pipe and the thin-wall pipe are radially provided with the plurality of through holes, at least two groups of bearing brackets and bearing assemblies are axially arranged inside the central pipe, a spiral pump shaft penetrates through the bearings, the bearings and the spiral pump shaft form rotary fit, and spiral blades are fixedly wound on the spiral pump shaft between the bearings. The two ends of the central tube extend out from the two ends of the thin-wall tube, and threads are machined on the extending ends. Two bearing brackets and bearing assemblies at the end of the center tube are near the extended end of the center tube. The spiral pump sand filtering pipe is characterized in that an Archimedes spiral pump is introduced into the sand filtering pipe and is arranged at a designated position of a production section, an electric submersible pump is matched with a power transmission and ground control system at the upper part, an underground motor drives a spiral impeller to push liquid in the pipe from the downstream end to the upstream end, the production pressure difference of two end layers of the pipe is balanced, the production of the upstream layer of the pipe is obviously promoted, the production of the downstream layer of the pipe is properly restrained, and the flow section uniformity of the production section is improved. Advantages of the screw pump sand screen technology include: the sand filtering pipe is provided with power, has a liquid extracting function and is suitable for working conditions of high-viscosity fluid and bottom liquid production; the spiral impeller in the sand filtering pipe has no sealing requirement, has simple and reliable structure, and is suitable for the working condition of high-sand-content fluid; the rotating speed of the spiral impeller can be changed at any time in the working process, and the liquid production profile can be adjusted in real time. The problems with this technique are: the screw pump and the sieve tube are integrated into a whole, the sieve tube can be buried by sand after production, and the sieve tube is difficult to overhaul; the screw pump occupies space in the pipe, and other working tools cannot be put in; the cable needs to be arranged outside the sieve tube pipe column, only the incident hole sleeve can be put down, and the cable can be worn by the well bore with the open hole.
Accordingly, there is a need for a significant improvement over the existing problems of screw pump sand screens.
Disclosure of Invention
The invention aims to solve the problems of a sand filtering pipe of a screw pump related to patent application number 201410501693.2 and provides a balanced liquid extracting device of the screw pump in a horizontal well pipe. The device changes the screw pump into an independent inner pipe tool, and is connected with the upper electric submersible pump through the oil pipe, so that the original well completion pipe column structure is not changed, and the device is easy to accept by oil extraction plants; the tool radius of the spiral pump in the pipe is smaller, the spiral pump is easy to drop in, is suitable for the working condition of small well diameter, and can be used for balanced liquid extraction of old wells; the electric submersible pump can be overhauled along with the electric submersible pump, meanwhile, space is reserved for other working tools, when the electric submersible pump is restarted, the length of a hanging oil pipe at the upper part of the tool can be changed, the lower well depth of the screw pump can be adjusted, or the screw pumps with different lengths can be replaced, and the liquid pushing capacity of the screw pump can be adjusted.
The technical scheme of the invention is as follows:
The balanced liquid extracting device for the spiral pump in the horizontal well pipe mainly comprises an oil pipe, a cable passing packer, an electric submersible pump unit, a sleeve centralizer, a cable, a suspension centralizer, a well completion sieve tube, a centralizer, a driving motor, an anti-rotation anchoring mechanism, a spiral pump body, a well flushing valve and a guide shoe; wherein:
The electric submersible pump unit is connected with the upper section oil pipe above, the electric submersible pump unit is connected with the casing centralizer, the cable passing packer is arranged at the connecting section of the upper section oil pipe and the electric submersible pump unit, the lower part of the casing centralizer is sequentially connected with the centralizer, the driving motor, the anti-rotation anchoring mechanism, the spiral pump body, the well flushing valve and the guide shoe through the transition oil pipe, the well completion screen pipe is sleeved outside the centralizer, the driving motor, the anti-rotation anchoring mechanism and the spiral pump body, the well completion screen pipe is suspended on the inner wall of the lower end part of the casing through the suspension centralizer, and the cable sequentially passes through the cable packer, the electric submersible pump unit, the casing centralizer and the suspension centralizer to be connected with the driving motor.
The above scheme further includes:
the well flushing valve also comprises a centralizer arranged between the spiral pump body and the anti-rotation anchoring mechanism.
The electric submersible pump unit mainly comprises a cable connector, an inner connector, an oil drain valve, a check valve, a pump, an electric submersible pump protection pipe, an oil-gas separator, a submersible motor protector, a submersible motor and a protection pipe end connector; wherein: the electric submersible pump protection pipe is a hollow revolution body, the upper end and the lower end of the electric submersible pump protection pipe are respectively connected with the end joint of the protection pipe, and the pipe wall is provided with a through hole array around the axis; the oil drain valve, the uniflow valve, the pump, the electric submersible pump protection pipe, the oil-gas separator, the submersible motor protector and the submersible motor are sequentially connected from top to bottom, the upper part is connected with the end joint of the upper protection pipe through an inner joint, and the lower part is connected with the end joint of the lower protection pipe through a fixed block; the cable joints are respectively arranged on the end joints of the protection pipe at the upper end and the lower end, and after the cable passes through the upper cable joint, the end joint of the upper protection pipe and the protection pipe of the electric submersible pump from top to bottom in sequence and is connected into the submersible motor protector, the cable is led out through the end joint of the lower protection pipe and the lower cable joint.
The spiral pump body mainly comprises a transmission shaft connecting sleeve, a bearing, a spiral pump end cover, a spiral pump jacket and a spiral impeller; wherein: the two ends of the screw pump jacket are respectively connected with screw pump end covers to form a pump cylinder, the screw impeller is communicated with a central shaft in the screw pump cylinder, the upper end of the central shaft is connected with a driving motor output shaft above the central shaft through a transmission shaft connecting sleeve, and a plurality of strip-shaped through holes are formed in the conical shoulder of the screw pump end covers around the axis.
The end joint of the protection pipe is a hollow revolution body with different diameters from top to bottom, the upper end is provided with a conical external thread which is connected and matched with an oil pipe, the middle step is provided with a cable through hole a, and the lower end is provided with a gradient internal thread a and an internal thread b.
The inner joint is a hollow revolving body with different diameters from top to bottom, the upper end part is processed with an external thread b which is connected and matched with an internal thread b of the end joint of the protection pipe, the lower end is processed with an internal thread c which is connected and matched with an oil drain valve, and the middle step is processed with a cable through hole b.
The electric submersible pump protection pipe is a hollow revolution body, the upper end part and the lower end part are respectively provided with external threads b which are connected and matched with the internal threads a of the end joint of the protection pipe, and the pipe wall is provided with a strip through hole array around the axis.
The casing centralizer is a hollow revolution body, a plurality of centralizing blocks are arranged on the periphery of the casing centralizer, and the upper end and the lower end of the casing centralizer are respectively connected with a conical external thread of a joint at the end of the protection pipe and a transitional oil pipe through threads.
The centralizer is a hollow revolution body, a plurality of cable grooves are formed in the outer circle portion around the axis, a plurality of centralizer sheets are arranged on the periphery of the outer circle portion, the upper portion of the pipe body is connected with a transition oil pipe, the lower portion of the pipe body is connected with a driving motor, and a through hole a is formed in the axis.
The transmission shaft connecting sleeve is a hollow revolution body, and a semicircular rectangular through hole is processed at the axis; the screw pump end cover is a hollow revolution body, an external thread c and a through hole b which are connected with a driving motor are processed at the axis of the top end, and an external thread d is processed at the lower end part of the main body; the screw pump jacket is a tubular body, and the upper end and the lower end of the screw pump jacket are respectively provided with internal threads d and e which are connected with an external thread c of the screw pump end cover; the spiral impeller is characterized in that a spiral blade is welded on a central shaft, a semicircular rectangular shaft is machined at the butt joint end of the central shaft and a transmission shaft connecting sleeve, and a rotating shaft is machined at the other end of the central shaft.
The spiral pump is an independent inner pipe tool, is arranged at a designated position of a production section of a horizontal well, is connected with an upper electric submersible pump through an oil pipe, and shares an electric power transmission and ground control system. The underground motor of the screw pump drives the screw impeller to push the liquid in the pipe from the downstream to the upstream, so that the production pressure difference at two ends of the sand filtering pipe can be balanced, the inflow profile balance of a production section is improved, the liquid extracting effect is achieved, and the purpose of fully exerting the liquid extracting advantage of the horizontal well is achieved.
Drawings
FIG. 1 is a schematic diagram of an application of a balanced liquid extracting device of a spiral pump in a horizontal well pipe;
in the figure: 1. oil pipe, 2, cable passing packer, 3, electric submersible pump unit, 4, sleeve, 5, sleeve centralizer, 6, cable, 7, hanging packer, 8, well completion screen pipe, 9, centralizer, 10, driving motor, 11, anti-rotation anchoring mechanism, 12, spiral pump body, 13, well flushing valve, 14, and guide shoe.
FIG. 2 is a schematic diagram of the structure of the electric submersible pump unit provided by the invention;
in the figure: 301. cable joint, 302, inner joint, 303, oil drain valve, 304, check valve, 305, pump, 306, electric submersible pump protection pipe, 307, oil-gas separator, 308, submersible motor protector, 309, submersible motor, 310, protection pipe end joint.
FIG. 3 is a schematic view of the structure of the screw pump mechanism provided by the present invention;
120, a transmission shaft connecting sleeve, 121, a bearing, 122, a screw pump end cover, 123, a screw pump jacket, 124 and a screw impeller.
FIG. 4 is a schematic view of the structure of the nipple provided by the present invention;
in the figure: 3021. external threads a,3022, internal threads c,3023, a cable through hole b.
FIG. 5 is a schematic view of the structure of the end fitting of the protective tube provided by the present invention;
In the figure: 3101. conical external threads 3102, through-cable bores a,3103, lower internal threads a,3104, and internal threads b.
FIG. 6 is a schematic view of the structure of the protection tube of the submersible pump according to the present invention;
in the figure: 3062. external screw thread b,3061, rectangular through-hole.
FIG. 7 is a schematic view of the structure of a centralizer provided by the invention;
In the figure: 91. cable groove, 92, centralizer sheet, 93, upper internal thread, 94, lower internal thread, 95, through hole a.
Fig. 8 is a schematic structural view of a transmission shaft connecting sleeve provided by the invention;
in the figure: 1201. a semicircular rectangular through hole.
FIG. 9 is a schematic view of the structure of the screw pump end cap provided by the present invention;
In the figure: 1221. bar-shaped through holes 1222, external threads c,1224, through holes b,1223, external threads d.
FIG. 10 is a schematic view of the structure of the screw pump casing provided by the present invention;
In the figure: 1231. Upper internal threads d,1232, lower internal threads e.
FIG. 11 is a schematic view of the structure of a screw impeller provided by the present invention;
In the figure: 1241. helical blades 1242, a central shaft 1243, a semicircular rectangular shaft 1244 and a rotary shaft.
Detailed description of the preferred embodiments
The invention will be further described with reference to the drawings and the specific examples.
Example 1
The balanced liquid extracting device of the spiral pump in the horizontal well pipe mainly comprises an oil pipe 1, a cable passing packer 2, an electric submersible pump unit 3, a casing centralizer 5, a cable 6, a suspension centralizer 7, a well completion sieve tube 8, a centralizer 9, a driving motor 10, an anti-rotation anchoring mechanism 11, a spiral pump body 12, a well flushing valve 13 and a guide shoe 14; wherein:
The upper side of the electric submersible pump unit 3 is connected with the upper section oil pipe 1, the lower side of the electric submersible pump unit 3 is connected with the casing centralizer 5, the cable passing packer 2 is arranged at the connecting section of the upper section oil pipe 1 and the electric submersible pump unit 3, the lower side of the casing centralizer 5 is sequentially connected with the centralizer 9, the driving motor 10, the anti-rotation anchoring mechanism 11, the spiral pump body 12, the well washing valve 13 and the guide shoe 14 through the transition oil pipe 1, the well completion sieve tube 8 is sleeved outside the centralizer 9, the driving motor 10, the anti-rotation anchoring mechanism 11 and the spiral pump body 12, the well completion sieve tube 8 is hung on the inner wall of the lower end part of the casing 4 through the hanging centralizer 7, and the cable 6 sequentially passes through the cable packer 2, the electric submersible pump unit 3, the casing centralizer 5 and the hanging centralizer 7 to be connected with the driving motor 10.
Example 2
The above embodiment 1 further includes: and a centralizer 9 arranged between the spiral pump body 12 and the anti-rotation anchoring mechanism 11 and the well flushing valve 13.
Example 3
On the basis of the embodiment 1 or 2, the electric submersible pump unit 3 mainly comprises a cable connector 301, an inner connector 302, an oil drain valve 303, a single-flow valve 304, a pump 305, an electric submersible pump protection pipe 306, an oil-gas separator 307, an oil submersible motor protector 308, an oil submersible motor 309 and a protection pipe end connector 310; wherein: the electric submersible pump protection tube 306 is a hollow revolution body, the upper end and the lower end of the electric submersible pump protection tube are respectively connected with a protection tube end connector 310, and a through hole array is processed on the tube wall around the axis; the oil drain valve 303, the uniflow valve 304, the pump 305, the electric submersible pump protection pipe 306, the oil-gas separator 307, the submersible motor protector 308 and the submersible motor 309 are sequentially connected from top to bottom, wherein the upper part is connected with the upper protection pipe end connector 310 through the inner connector 302, and the lower part is connected with the lower protection pipe end connector 310 through a fixed block; the cable joints 301 are respectively arranged on the protection pipe end joints 310 at the upper end and the lower end, and after the cable 6 sequentially passes through the upper cable joint 301, the upper protection pipe end joint 310 and the electric submersible pump protection pipe 306 from top to bottom and is connected into the submersible motor protector 308, the cable 6 is led out through the lower protection pipe end joint 310 and the lower cable joint 301.
The spiral pump body 12 mainly comprises a transmission shaft connecting sleeve 120, a bearing 121, a spiral pump end cover 122, a spiral pump jacket 123 and a spiral impeller 124; wherein: the two ends of the screw pump jacket 123 are respectively connected with the screw pump end covers 122 to form a pump cylinder, the screw impeller 124 is communicated with the central shaft 1242 and is arranged in the screw pump cylinder, the upper end of the central shaft 1242 is connected with the output shaft of the driving motor 10 above through the transmission shaft connecting sleeve 120, and a plurality of strip-shaped through holes 1221 are formed in the conical shoulder of the screw pump end covers 122 around the axis.
Example 4
On the basis of embodiment 3, the protecting pipe end joint 310 is a hollow revolution body with different diameters from top to bottom, the upper end is processed with a conical external thread 3101 connected and matched with the oil pipe 1, the middle step is processed with a cable through hole a3102, and the lower end is processed with a gradient internal thread a3103 and an internal thread b3104.
The inner joint 302 is a hollow rotator with different diameters from top to bottom, the upper end is provided with an external thread a3021 which is connected and matched with an internal thread b3104 of the end joint 310 of the protection pipe, the lower end is provided with an internal thread c3022 which is connected and matched with the oil drain valve 303, and the middle step is provided with a cable through hole b3023.
The electric submersible pump protecting pipe 306 is a hollow revolution body, the upper end and the lower end are respectively provided with an external thread b3062 which is connected and matched with an internal thread a3103 of the protecting pipe end connector 310, and the pipe wall is provided with an array of strip through holes 3061 around the axis.
The sleeve centralizer 5 is a hollow revolution body, a plurality of centralizing blocks are arranged on the periphery of the sleeve centralizer, and the upper end and the lower end of the sleeve centralizer are respectively connected with the conical external thread 3101 of the protecting pipe end joint 310 and the transition oil pipe 1 through threads.
The centralizer 9 is a hollow revolution body, a plurality of cable grooves 91 are formed in the outer circle portion around the axis, a plurality of centralizer sheets 92 are arranged on the periphery of the outer circle portion, the upper portion of the pipe body is connected with the transition oil pipe 1, the lower portion of the pipe body is connected with the driving motor 10, and a through hole a95 is formed in the axis.
The transmission shaft connecting sleeve 120 is a hollow revolution body, and a semicircular rectangular through hole 1201 is processed at the axis; the screw pump end cover 122 is a hollow revolution body, an external thread c1222 and a through hole b1224 which are connected with the driving motor 10 are processed at the top end axle center, and an external thread c1223 is processed at the lower end part of the main body; the screw pump jacket 123 is a tubular body, and the upper end and the lower end of the screw pump jacket are respectively provided with internal threads d1231 and e1232 connected with external threads c1223 of the screw pump end cover 122; the spiral impeller 124 is formed by welding a spiral blade 1241 on a central shaft 1242, a semicircular rectangular shaft 1243 is machined at the butt joint end of the central shaft 1242 and the transmission shaft connecting sleeve 120, and a rotating shaft 1244 is machined at the other end.
Example 5
The balanced liquid extracting device for the spiral pump in the horizontal well pipe mainly comprises an oil pipe 1, a cable passing packer 2, an electric submersible pump unit 3, a casing centralizer 5, a cable 6, a suspension centralizer 7, a well completion sieve tube 8, a centralizer 9, a driving motor 10, an anti-rotation anchoring mechanism 11, a spiral pump body 12, a well flushing valve 13 and a guide shoe 14 (see figure 1).
The electric submersible pump unit 3 is composed of a cable joint 301, an inner joint 302, an oil drain valve 303, a single flow valve 304, a pump 305, an electric submersible pump protection pipe 306, an oil-gas separator 307, a protector 308, a submersible motor protection pipe end joint 309 and a protection pipe end joint 310 (see fig. 2).
The screw pump body 12 is composed of a transmission shaft connecting sleeve 120, a bearing 121, a screw pump end cover 122, a screw pump outer sleeve 123, a screw impeller 124 and a cable joint 301 (see fig. 3).
The inner joint 302 (see fig. 4) is a hollow rotator with different diameters from top to bottom, the upper end is provided with an external thread a3021, the lower end is provided with an internal thread b3022, and the middle step is provided with a through hole b3023.
The protecting pipe end connector 310 (see fig. 5) is a hollow rotator with different diameters from top to bottom, the upper end is provided with a conical external thread 3101, the middle step is provided with a cable through hole a3102, and the lower end is provided with internal threads a3103 and b internal thread 3104.
The electric submersible pump protecting tube 306 (see fig. 6) is a hollow revolution body, the upper end and the lower end of the electric submersible pump protecting tube are respectively provided with external threads b3062, and the tube wall is provided with an array of strip through holes 3061 around the axis.
The centralizer 9 (see fig. 7) is a hollow revolution body, a plurality of cable grooves 91 are formed in the outer circle portion around the axis, a plurality of centralizer sheets 92 are arranged on the periphery of the outer circle portion, an upper internal thread 93 is formed in the upper portion of the pipe body, a lower internal thread 94 is formed in the lower portion of the pipe body, and a through hole a95 is formed in the axis.
The transmission shaft connecting sleeve 120 (see fig. 8) is a hollow revolution body, and a semicircular rectangular through hole 1201 is machined at the axis.
The screw pump end cap 122 (see fig. 9) is a hollow body, a plurality of bar-shaped through holes 1221 are formed in the conical shoulder around the axis, external threads c1222 and through holes b1224 are formed in the top axis, and external threads d1223 are formed in the lower end of the main body.
The screw pump housing 123 (see fig. 10) is a tubular body, and has an inner thread d1231 and an inner thread e1232 formed at the upper and lower ends thereof, respectively.
The spiral impeller 124 (see fig. 11) has a spiral blade 1241 welded on a central shaft 1242, a semicircular rectangular shaft 1243 is machined at the left end of the central shaft 1242, and a rotating shaft 1244 is machined at the right end.
Principle of electric submersible pump assembly (see fig. 2): the drain valve 303, the check valve 304, the pump 305, the gas-oil separator 307, the protector 308 and the submersible motor 309 are sequentially connected in series, and the cable 6 is connected. The internal thread c3022 of the inner joint 302 is tightly coupled to the upper thread of the oil drain valve 303, and the external thread a3021 is tightly coupled to the internal thread b3104 of the protection pipe end joint 310. The electric submersible pump protection tube 306 is sleeved outside the electric submersible pump unit, and the internal thread a3103 of the protection tube end connector 310 is tightly connected with the external thread b3062 of the electric submersible pump protection tube 306. Similarly, the external thread b3062 at the lower end of the electric submersible pump protection tube 306 is tightly connected with the internal thread a3103 of another identical protection tube end fitting 310. The tapered threads 3101 of the protection pipe end fitting 310 are threaded with the casing centralizer 5.
Screw pump mechanism assembly principle (see fig. 3): the upper end of the driving motor 10 is connected with the internal thread 94 of the centralizer 9, and the driving motor 10 is fixedly connected with the anti-rotation anchoring mechanism 11. The lower end of the anti-rotation anchoring mechanism 11 is tightly connected with the internal thread 93 on the centralizer 9, the transmission shaft connecting sleeve 120 is sleeved in the through hole a95 of the centralizer 9, and meanwhile, the output shaft of the driving motor is inserted into the semicircular rectangular hole 1201 of the transmission shaft connecting sleeve 120 to be in sliding fit. The internal threads 93 on centralizer 9 are tightly coupled with the external threads c1222 of screw pump end cap 122, and bearing 121 is installed in the through hole of screw pump end cap 122. The semicircular rectangular shaft 1243 of the spiral pump blade 124 is sleeved into the semicircular rectangular hole 1201 of the transmission shaft connecting sleeve 120 to be in sliding fit. Screw pump housing 123 is positioned over screw pump vane 124 with its upper internal threads d1231 in close engagement with external threads d1223 of screw pump end cap 122. External threads d1223 of screw pump housing 123 are tightly coupled to external threads b1224 of screw pump end cap 122. Simultaneously, the lower end rotating shaft 1244 of the screw pump blade 124 is inserted into the through hole 1224 of the screw pump end cover 122 and is in sliding fit, and finally, the external thread c1222 of the screw pump end cover 122 is tightly connected with the upper internal thread 93 of the centralizer 9.
The working principle of the balanced liquid extracting device of the spiral pump in the horizontal well pipe (see figure 1) is as follows: the casing 4 is in good condition in the vertical well section, and the completion process of the horizontal well section is completed by the hanging packer 7, the completion screen pipe 8, the well washing valve 13 and the induced shoes 14. The internal thread 93 of the top centralizer 9 of the assembled screw pump mechanism is screwed to the bottom end of the tubing 1, which top end is connected to the casing centralizer 5 of the electric submersible pump assembly. The conical thread 3101 of the protecting pipe end connector 310 at the top end of the electric submersible pump unit is connected with the oil pipe 1 through the cable packer 2, and the cable 6 is fixed on the corresponding component by a clip according to requirements in the connection process.
The working principle of the balanced liquid extraction technology of the spiral pump in the horizontal well pipe (see figure 1) is as follows: the integrally connected assembly is run downhole with the electric submersible pump assembly in the vertical section and the screw pump mechanism in the horizontal section and completely into the inner tube of the completion screen 8.
The working principle of the balanced liquid extraction technology of the spiral pump in the horizontal well pipe (see figure 1) is as follows: when the screw pump mechanism works, the driving motor 10 drives the screw pump blades 124 to rotate, and the downhole fluid is driven by the screw impeller 1241 to drive the fluid in the shaft to be introduced from the strip-shaped through hole 1221 of the right Fang Luoxuan pump end cover 122 of the screw pump body 12 and pushed out from the strip-shaped through hole 1221 of the left Fang Luogan pump end cover 122 of the screw pump body 12.
Claims (9)
1. The balanced liquid extracting device of the spiral pump in the horizontal well pipe mainly comprises an oil pipe (1), a cable passing packer (2), an electric submersible pump unit (3), a casing centralizer (5), a cable (6), a hanging packer (7), a well completion screen pipe (8), a centralizer (9), a driving motor (10), an anti-rotation anchoring mechanism (11), a spiral pump body (12), a well washing valve (13) and a guide shoe (14); the method is characterized in that: the upper part of the electric submersible pump unit (3) is connected with the upper section oil pipe (1), the lower part of the electric submersible pump unit (3) is connected with the casing centralizer (5), the cable passing packer (2) is arranged at the connecting section of the upper section oil pipe (1) and the electric submersible pump unit (3), the lower part of the casing centralizer (5) is sequentially connected with the centralizer (9), the driving motor (10), the anti-rotation anchoring mechanism (11), the spiral pump body (12), the well flushing valve (13) and the induced shoes (14) through the transition oil pipe (1), the well completion sieve tube (8) is sleeved outside the centralizer (9), the driving motor (10), the anti-rotation anchoring mechanism (11) and the spiral pump body (12), the well completion sieve tube (8) is suspended on the inner wall of the lower end part of the casing (4) through the suspension packer (7), and the cable (6) sequentially passes through the cable passing packer (2), the electric submersible pump unit (3), the casing centralizer (5) and the suspension packer (7) to be connected with the driving motor (10); the spiral pump body (12) mainly comprises a transmission shaft connecting sleeve (120), a bearing (121), a spiral pump end cover (122), a spiral pump jacket (123) and a spiral impeller (124); wherein: two ends of a screw pump jacket (123) are respectively connected with screw pump end covers (122) to form a pump cylinder, a screw impeller (124) is communicated with a central shaft (1242) and is arranged in the screw pump cylinder, the upper end of the central shaft (1242) is connected with an output shaft of a driving motor (10) above through a transmission shaft connecting sleeve (120), and a plurality of strip-shaped through holes (1221) are formed in the conical shoulder of the screw pump end cover (122) around the axis; and under the condition that the casing (4) of the straight well section is intact and the completion process of the horizontal section is completed by the hanging packer (7), the completion screen pipe (8), the well flushing valve (13) and the guide shoe (14), the internal thread (93) of the top centralizer (9) of the assembled screw pump mechanism is in threaded connection with the bottom end of the oil pipe (1), and the top end of the oil pipe (1) is connected with the casing centralizer (5) of the electric submersible pump unit.
2. The balanced liquid extraction device of the internal spiral pump of the horizontal well pipe according to claim 1, further comprising a centralizer (9) arranged between the spiral pump body (12) and the anti-rotation anchoring mechanism (11) and the well flushing valve (13).
3. The balanced liquid lifting device of the internal screw pump of the horizontal well pipe according to claim 1 or 2, wherein the electric submersible pump unit (3) mainly comprises a cable joint (301), an inner joint (302), an oil drain valve (303), a single flow valve (304), a pump (305), an electric submersible pump protection pipe (306), an oil-gas separator (307), an oil submersible motor protector (308), an oil submersible motor (309) and a protection pipe end joint (310); wherein: the electric submersible pump protection pipe (306) is a hollow revolution body, the upper end and the lower end of the electric submersible pump protection pipe are respectively connected with a protection pipe end joint (310), and a through hole array is processed on the pipe wall around the axis; the oil drain valve (303), the uniflow valve (304), the pump (305), the electric submersible pump protection pipe (306), the oil-gas separator (307), the submersible motor protector (308) and the submersible motor (309) are sequentially connected from top to bottom, the upper part is connected with the end joint (310) of the upper protection pipe through the inner joint (302), and the lower part is connected with the end joint (310) of the lower protection pipe through the fixed block; the cable joints (301) are respectively arranged on the protection pipe end joints (310) at the upper end and the lower end, and after the cable (6) sequentially passes through the upper cable joint (301), the upper protection pipe end joint (310) and the electric submersible pump protection pipe (306) from top to bottom and is connected into the submersible motor protector (308), the cable (6) is simultaneously led out through the lower protection pipe end joint (310) and the lower cable joint (301).
4. The balanced liquid extracting device of the internal screw pump of the horizontal well pipe according to claim 3, wherein the end joint (310) of the protective pipe is a hollow revolution body with different diameters from top to bottom, a conical external thread (3101) which is connected and matched with the oil pipe (1) is processed at the upper end, a cable through hole a (3102) is processed at the middle step, and a gradient internal thread a (3103) and an internal thread b (3104) are processed at the lower end.
5. The balanced liquid extracting device of the internal screw pump of the horizontal well pipe according to claim 4, wherein the internal joint (302) is a hollow revolving body with different diameters from top to bottom, the upper end is provided with an external thread a (3021) which is connected and matched with an internal thread b (3104) of the end joint (310) of the protection pipe, the lower end is provided with an internal thread c (3022) which is connected and matched with an oil drain valve (303), and the middle step is provided with a cable through hole b (3023).
6. The balanced liquid extracting device for the internal screw pump of the horizontal well pipe according to claim 5, wherein the electric submersible pump protection pipe (306) is a hollow revolution body, the upper end and the lower end of the electric submersible pump protection pipe are respectively provided with external threads b (3062) which are connected and matched with internal threads a (3103) of an end joint (310) of the protection pipe, and the pipe wall is provided with an array of strip through holes (3061) around the axis.
7. The balanced liquid extracting device of the spiral pump in the horizontal well pipe according to claim 6, wherein the casing centralizer (5) is a hollow revolution body, a plurality of centralizing blocks are arranged on the periphery of the casing centralizer, and the upper end and the lower end of the casing centralizer are respectively connected with a conical external thread (3101) of the end joint (310) of the protection pipe and the transition oil pipe (1) through threads.
8. The balanced liquid lifting device of the spiral pump in the horizontal well pipe according to claim 7, wherein the centralizer (9) is a hollow revolution body, a plurality of cable grooves (91) are formed in the outer circle part around the axis, a plurality of centralizer sheets (92) are arranged on the periphery of the outer circle part, the upper part of the pipe body is connected with the transition oil pipe (1), the lower part of the pipe body is connected with the driving motor (10), and a through hole a (95) is formed in the axis.
9. The balanced liquid extracting device of the spiral pump in the horizontal well pipe according to claim 8, which is characterized in that the transmission shaft connecting sleeve (120) is a hollow revolution body, and a semicircular rectangular through hole (1201) is processed at the axis; the screw pump end cover (122) is a hollow revolution body, an external thread c (1222) and a through hole b (1224) which are connected with the driving motor (10) are processed at the top end axle center, and an external thread d (1223) is processed at the lower end part of the main body; the screw pump jacket (123) is a tubular body, and the upper end and the lower end of the screw pump jacket are respectively provided with internal threads d (1231) and e (1232) which are connected with external threads d (1223) of the screw pump end cover (122); the spiral impeller (124) is characterized in that a central shaft (1242) is welded with a spiral blade (1241), a semicircular rectangular shaft (1243) is machined at the butt joint end of the central shaft (1242) and a transmission shaft connecting sleeve (120), and a rotating shaft (1244) is machined at the other end.
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| CN201407182Y (en) * | 2009-05-14 | 2010-02-17 | 胜利油田胜利泵业有限责任公司 | Low-speed direct-drive submersible electric screw pump unit |
| CN101864932B (en) * | 2010-05-28 | 2013-01-09 | 盘锦三阳石油科技发展有限公司 | Large-discharge electric submerged screw pump oil extracting equipment |
| CN105507854A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | Screw pump sand filter pipe |
| CN204754886U (en) * | 2015-07-10 | 2015-11-11 | 中国石油天然气股份有限公司 | Direct-drive screw pump oil production device with top-mounted submersible motor |
| CN107893754B (en) * | 2016-04-13 | 2019-05-03 | 友力机电有限公司 | A kind of application method of electric submersible screw pump |
| CN110043227A (en) * | 2019-04-19 | 2019-07-23 | 中国石油天然气股份有限公司 | Oil-submersible hollow rotor screw pump oil production device |
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