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CN-121993419-A - Electric submersible pump device and method for lifting polymer-containing produced liquid and shearing pipe

CN121993419ACN 121993419 ACN121993419 ACN 121993419ACN-121993419-A

Abstract

The invention discloses an electric submersible pump device and method for lifting polymer-containing produced liquid and a shear pipe, wherein the electric submersible pump device comprises an oil outlet pipe, the upper end of the oil outlet pipe is connected with a pump body, the lower end of the oil outlet pipe is connected with a shear pipe group, an oil outlet shaft is arranged in the oil outlet pipe, an output shaft of the pump body is connected with the oil outlet shaft, the oil outlet shaft is provided with an oil outlet spiral disc, a shear base shaft is arranged in the shear pipe group and is connected with the oil outlet shaft, a top shear ring is fixedly arranged on the outer wall of the shear base shaft, a top shear knife is arranged on the outer wall of the top shear ring, the shear base shaft is connected with a bottom shear ring through a rotary reversing mechanism, and a bottom shear knife is arranged on the outer wall of the bottom shear ring. According to the invention, the rotation directions of the top shearing ring and the bottom shearing ring are opposite, so that the rotation directions of the bottom shearing blade and the top shearing blade are opposite, and the petroleum polymer can be sheared twice, thereby ensuring the shearing effect and improving the lifting efficiency.

Inventors

  • ZHANG XUEMEI
  • WANG XIN
  • CHE CHUANRUI
  • ZHU JUNMENG
  • NIE FEIPENG
  • SHI QIONG
  • ZHANG LUYAN

Assignees

  • 中国石油化工股份有限公司
  • 中国石油化工股份有限公司胜利油田分公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (16)

  1. 1. The electric submersible pump device for lifting the polymer-containing produced liquid comprises an oil outlet pipe, wherein the upper end of the oil outlet pipe is connected with a pump body, the lower end of the oil outlet pipe is connected with a shearing pipe group, an oil outlet shaft is arranged in the oil outlet pipe, an output shaft of the pump body is connected with the oil outlet shaft, and the oil outlet shaft is provided with an oil outlet spiral disc; The shearing base shaft is connected with the bottom shearing ring through a rotating reversing mechanism, and the bottom shearing ring is provided with a bottom shearing blade.
  2. 2. The electric submersible pump device for lifting polymer-containing produced liquid according to claim 1, wherein the top shearing blade comprises a top shearing main blade and a top shearing auxiliary blade, the cross section of the top shearing blade is of an arc-shaped structure, the top shearing auxiliary blade is arranged in an arc-shaped opening of the top shearing main blade, and the tip of the top shearing auxiliary blade faces to the opposite direction of the tip of the top shearing main blade; The bottom shearing knife comprises a bottom shearing main knife and a bottom shearing auxiliary knife, the section of the bottom shearing knife is of an arc-shaped structure, the bottom shearing auxiliary knife is arranged in an arc-shaped opening of the bottom shearing main knife, and the tip end of the bottom shearing auxiliary knife and the tip end of the bottom shearing main knife face to opposite directions; the direction of the top shearing main cutter head is opposite to that of the bottom shearing main cutter head.
  3. 3. The electric submersible pump device for lifting polymer-containing produced fluid according to claim 1, wherein the rotary reversing mechanism comprises a gear shaft, a bottom shearing gear and a bottom shearing ring rotary gear; the shearing base shaft is divided into two parts, and comprises a front section shaft and a rear section shaft, wherein a gear shaft is led out from the center of the lower end of the front section shaft, a bottom shearing gear is arranged on the gear shaft, and the rear section shaft is fixedly connected with the gear shaft; The top shearing ring is arranged on the outer wall of the front section shaft, the bottom shearing ring is arranged between the front section shaft and the rear section shaft, the inner wall of the bottom shearing ring is provided with a bottom shearing ring rotating gear, a planetary gear is arranged between the bottom shearing ring rotating gear and the bottom shearing gear, the bottom shearing ring rotating gear is meshed with the planetary gear, and the planetary gear is meshed with the bottom shearing gear; the planetary gear is connected with the pipe wall of the pipe where the shearing base shaft is located through a planetary gear positioning rod, and the planetary gear is rotationally connected with the planetary gear positioning rod; The upper end and the lower end of the bottom shearing ring are fixedly provided with bottom shearing ring positioning plates, and the planetary gear is positioned between the two bottom shearing ring positioning plates.
  4. 4. The electric submersible pump device for lifting the polymer-containing produced liquid according to claim 3, wherein the bottom of the planetary gear positioning rod is provided with a gear positioning bearing, and the planetary gear positioning rod is fixedly connected with an outer ring of the gear positioning bearing; The gear positioning bearing inner ring is fixedly connected with a rear section shaft or a gear shaft of the shearing base shaft, a gear bearing connecting rod is fixed on the outer wall of the gear positioning bearing outer ring, and the gear bearing connecting rod is fixedly connected with the pipe wall of the pipe where the shearing base shaft is located.
  5. 5. The electric submersible pump device for lifting polymer-containing produced liquid according to claim 4, wherein at least one shear pipe is arranged in the shear pipe group, the lower end of the shear pipe group is connected with a filter pipe, a shear shaft is arranged in each shear pipe, a filter pipe rotating shaft is arranged in each filter pipe, and the structure of the shear shaft and the filter pipe rotating shaft is the same as that of the shear base shaft; The base shaft oil feeding spiral disc is fixedly arranged between the top shearing mechanism and the bottom shearing mechanism.
  6. 6. The electric submersible pump device for lifting polymer-containing produced liquid according to claim 5, wherein oil delivery pipes are arranged between the oil outlet pipe and the shearing pipes, between every two shearing pipes and between the shearing pipes and the filter pipe, and the shearing pipes are connected with the oil delivery pipes, the oil outlet pipe is connected with the oil delivery pipes, and the filter pipe is connected with the oil delivery pipes through connecting mechanisms; The connecting mechanism comprises a connecting pipe and a shaft connecting piece; the oil conveying pipe is connected with the oil outlet pipe or the shearing pipe or the filtering pipe through a connecting pipe, an oil conveying shaft is arranged in the oil conveying pipe, and the oil conveying shaft is connected with an oil outlet shaft or a rotating shaft of the shearing shaft or the filtering pipe through a shaft connecting piece; the oil feeding shaft is provided with an oil feeding spiral disc.
  7. 7. The electric submersible pump assembly for lifting polymer-containing produced fluids as recited in claim 6, wherein the connecting tube comprises a bottom connecting block, a top connecting block, and a connecting ring; The bottom connecting block is fixedly arranged at the top of the oil delivery pipe or the top of the shearing pipe or the top of the filter pipe, the top connecting block is fixedly arranged at the bottom of the oil delivery pipe or the bottom of the shearing pipe, the connecting ring is slidably sleeved outside the top connecting block and the bottom connecting block, the bottom connecting block and the top connecting block are fixedly connected through connecting bolts by the connecting ring, and a sealing ring is arranged between the connecting ring and the bottom connecting block and between the connecting ring and the top connecting block.
  8. 8. An electric submersible pump assembly for lifting polymer-containing produced fluids according to claim 7, wherein in one connection mechanism, the shaft connection is above the bottom connection block, a positioning bearing connection rod is fixed inside the bottom connection block, and a rotating shaft positioning bearing is fixed inside the positioning bearing connection rod, and the rotating shaft positioning bearing is matched with a corresponding oil feeding shaft or shearing shaft or a rotating shaft of the filter tube.
  9. 9. An electric submersible pump assembly for lifting polymer-containing produced fluids as recited in claim 8, wherein the shaft connector comprises a stationary ring, a top retaining ring, a bottom retaining ring, the top retaining ring being insertable into the bottom retaining ring, The positioning cavity comprises a positioning hole radially penetrating the bottom positioning ring and a positioning groove arranged on the outer wall of the bottom positioning ring; the top positioning ring is provided with a locking cavity, the locking cavity is a limiting hole penetrating through the top positioning ring in the radial direction, and the limiting hole corresponds to the positioning hole; The locking cavity is provided with a positioning rod in a sliding manner, one end of the positioning rod, which is close to the center of the top positioning ring, is provided with a positioning plate, a positioning spring is arranged between the positioning plate and the inner wall of the top positioning ring, the positioning spring is fixedly connected with the inner wall of the top positioning ring and the positioning plate, and when the positioning spring is in a normal state, the positioning rod extends out of the locking cavity and can be inserted into a positioning hole of the positioning cavity; The fixed ring is arranged on the outer wall of the bottom positioning ring in a sliding sleeve manner, the fixed ring is provided with a radial fixed bolt, the end of the fixed bolt in the fixed ring is provided with a positioning rod moving head, and the positioning rod moving head can be clamped into the positioning groove; the top positioning ring and the bottom positioning ring are arranged on two ends of two adjacent shafts.
  10. 10. An electric submersible pump device for lifting polymer-containing produced fluid according to claim 6, wherein the filter tube side wall is a filter mesh; The outer wall of the top of the filter tube is provided with a first convex ring, the first convex ring is provided with a downward cleaning rod positioning cavity, the cleaning rod positioning cavity is an annular groove, the rear section shaft of the filter tube rotating shaft penetrates out of the filter tube, and the rear section shaft of the filter tube rotating shaft is fixedly connected with the cleaning disc outside the filter tube; a cleaning rod is arranged between the cleaning disc and the cleaning rod positioning cavity, the cleaning rod is fixedly connected with the cleaning disc, and the cleaning rod is in sliding connection with the cleaning rod positioning cavity; The filter tube is characterized in that a filter tube positioning rod is further arranged inside the filter tube, a second convex ring is arranged on the inner wall of the upper end of the filter tube, the upper end of the filter tube positioning rod is connected with the convex ring, and the lower end of the filter tube positioning rod is fixedly connected with the gear bearing connecting rod through a fixing ring.
  11. 11. The electric submersible pump device for lifting the polymer-containing produced liquid according to claim 10, wherein a sand blocking rod bearing is arranged at the bottom of the cleaning disc, the cleaning disc is fixedly connected with an inner ring of the sand blocking rod bearing, and a sand blocking rod positioning disc is fixedly arranged on an outer ring of the sand blocking rod bearing; The sand blocking rod positioning disc is fixedly arranged between the sand blocking rod positioning disc and the first convex ring, the top end of the sand blocking rod is connected with the first convex ring, the sand blocking rod positioning disc is connected with the sand blocking rod, and the sand blocking rod is positioned outside the cleaning rod.
  12. 12. An assembling method of a tube and a tube of an electric submersible pump device for lifting a polymer-containing produced liquid, characterized by assembling the electric submersible pump device for lifting a polymer-containing produced liquid according to claim 9, comprising the following steps: Inserting the top positioning ring into the bottom positioning ring, enabling the side wall of the positioning rod to be in contact with the end face of the bottom positioning ring, pressing the positioning rod into the locking cavity by using a tool, applying force to the bottom positioning ring during the pressing process, enabling the pressed positioning rod to not rebound completely, completely inserting the top positioning ring into the bottom positioning ring, pressing a positioning head of the positioning rod into the locking cavity, and then moving outwards under the action of a positioning spring and a positioning plate, enabling the positioning rod to penetrate through the locking cavity and be inserted into the positioning cavity, and enabling the positioning head to be in contact with the positioning cavity to lock the top positioning ring and the bottom positioning ring; the positioning rod moving head is placed in a positioning groove of the positioning cavity, the position of the fixing ring is adjusted, the fixing bolt is screwed into the positioning rod moving head, the fixing bolt is screwed to fasten the fixing ring and the bottom positioning ring, the connecting ring, the bottom connecting block and the top connecting block are fixed through the connecting bolt, and the rotating shaft positioning bearing is seated in the positioning bearing connecting rod.
  13. 13. The method of assembling a tube and a tube of an electric submersible pump assembly for lifting a polymer-containing production fluid according to claim 12, wherein when the entire apparatus is to be disassembled, the connecting bolts are unscrewed, the connecting rings are pushed to move down, thereby exposing the fixing rings, unscrewing the fixing bolts, moving the fixing rings, moving the positioning rod moving head to the topmost end of the positioning hole in the positioning cavity, screwing the fixing bolts, moving the positioning rod moving head inward, pushing the positioning head inward, pulling the bottom positioning ring, disengaging the positioning rod from the limiting hole of the positioning cavity, and disengaging the top positioning ring and the bottom positioning ring.
  14. 14. A method of operating an electric submersible pump assembly for lifting a polymer-containing produced fluid, characterized by using an electric submersible pump assembly for lifting a polymer-containing produced fluid according to claim 11, comprising the steps of: When the petroleum polymer needs to be lifted, the pump body is controlled by the controller to work, and the oil outlet shaft, the oil feeding shaft, the shearing shaft and the rotating shaft of the filter pipe are driven to rotate, so that the oil outlet spiral disc, the oil feeding spiral disc and all the base shaft oil feeding spiral discs are driven to rotate, and the petroleum polymer is sucked into the filter pipe; The top shearing ring rotates to drive the top shearing blade to rotate, the shearing base shaft rotates the bottom shearing gear to drive the planetary gear to rotate, the planetary gear does not rotate around the shearing base shaft to drive the bottom shearing ring rotating gear to reversely rotate to drive the bottom shearing ring to reversely rotate, the sand blocking rod positioning disc does not rotate, and the cleaning disc rotates to enable the cleaning rod to rotate.
  15. 15. The bidirectional shearing pipe comprises a pipe body and is characterized in that a shearing base shaft is arranged in the pipe body, a top shearing ring is fixedly arranged on the outer wall of the shearing base shaft, and a top shearing knife is arranged on the outer wall of the top shearing ring; The shearing base shaft is connected with the bottom shearing ring through the rotating reversing mechanism, and a bottom shearing knife is arranged on the outer wall of the bottom shearing ring.
  16. 16. The bi-directional shear tube of claim 15, wherein said rotational reversing mechanism comprises a gear shaft, a bottom shear gear, a bottom shear ring rotation gear; the shearing base shaft is divided into two parts, and comprises a front section shaft and a rear section shaft, wherein a gear shaft is led out from the center of the lower end of the front section shaft, a bottom shearing gear is arranged on the gear shaft, and the rear section shaft is fixedly connected with the gear shaft; The top shearing ring is arranged on the outer wall of the front section shaft, the bottom shearing ring is arranged between the front section shaft and the rear section shaft, the inner wall of the bottom shearing ring is provided with a bottom shearing ring rotating gear, a planetary gear is arranged between the bottom shearing ring rotating gear and the bottom shearing gear, the bottom shearing ring rotating gear is meshed with the planetary gear, and the planetary gear is meshed with the bottom shearing gear; the planetary gear is connected with the pipe wall of the pipe where the shearing base shaft is located through a planetary gear positioning rod, and the planetary gear is rotationally connected with the planetary gear positioning rod; the upper end and the lower end of the bottom shearing ring are fixedly provided with bottom shearing ring positioning plates, and the planetary gear is positioned between the two bottom shearing ring positioning plates; the bottom of the planetary gear positioning rod is provided with a gear positioning bearing, and the planetary gear positioning rod is fixedly connected with an outer ring of the gear positioning bearing; The gear positioning bearing inner ring is fixedly connected with a rear section shaft or a gear shaft of the shearing base shaft, the gear bearing connecting rod is fixed on the outer wall of the gear positioning bearing outer ring, and the gear bearing connecting rod is fixedly connected with the pipe wall of the pipe body.

Description

Electric submersible pump device and method for lifting polymer-containing produced liquid and shearing pipe Technical Field The invention relates to the technical field of petroleum exploitation, in particular to an electric submersible pump device and method for lifting polymer-containing produced liquid and a shear tube. Background As the oil field enters the end of development, in order to further increase the recovery ratio, tertiary oil recovery technology is largely adopted, and polymer oil displacement technology is increasingly popularized and applied in the oil field. The polymer aging substances adhere to or block the positions of the suction inlet, the protector and the like of the electric pump along with the rising of the concentration of the polymer flooding block, so that the production of the electric pump is seriously influenced, the lifting efficiency is reduced, and the operation period of the electric pump is shortened. The existing lifting mode is to add a large amount of water into the sleeve to dilute the petroleum containing the polymer, the lifting efficiency is low, the lifting effect is poor, and the bottom filter screen is easy to block after long-time filtration when the existing lifting device lifts, so that the service life of the whole equipment is low. At present, no device design is specially designed for blocking the suction inlet of an electric pump containing polymer produced liquid, but only some technical development is performed for blocking prevention of thickened oil of the electric pump. The publication number is CN104373334B, which discloses an anti-blocking device for thickened oil of an electric submersible pump protector, wherein a stirring wheel and a sieve plate assembly are fixedly arranged on a shaft positioned in an inner cavity of an upper joint from top to bottom, 2 radial through holes are arranged above the stirring wheel and are respectively and fixedly provided with a liquid outlet check valve and a liquid inlet check valve, a sieve plate of the sieve plate assembly is fixedly arranged on the end surface of a fixed sleeve through screws, the sieve plate is in a circular plate shape, and axial sieve holes are formed in the sieve plate. The anti-blocking device has the beneficial effects that the anti-blocking capability of the thickened oil of the protector of the electric submersible pump can be improved, the blocking of the breathing hole of the protector by the thickened oil is reduced or eliminated, the service life of the protector is prolonged, and the anti-blocking device is better applicable to the exploitation of thickened oil, super-thickened oil and super-thickened oil wells, so that the service life of an electric submersible pump unit is prolonged. The disadvantage of this prior art is that the stirring wheel is only provided with one stage and cannot effectively break up the massive thickened oil. The publication number is CN203420918U, which discloses an anti-blocking device for the suction inlet of an electric submersible pump, wherein an anti-blocking assembly is arranged at the position corresponding to the suction inlet in the pump body, two ends of a shaft of the anti-blocking assembly are connected with a protector of the electric submersible pump through one end of a spline housing, the other end of the shaft of the anti-blocking assembly is connected with a pump shaft of a centrifugal pump, a stirring wheel, a spacer bush, the stirring wheel, the spacer bush and the stirring wheel are sequentially and fixedly arranged on the shaft of the anti-blocking assembly from top to bottom, 2 or more blades are uniformly distributed on the circumference of a hub of the stirring wheel, the end faces of the blades are radially outwards trapezoidal from the hub, and the blades of the stirring wheel in the anti-blocking assembly are arranged in a staggered manner on the circumference. The oil well pump has the beneficial effects that the structure is reasonable, so that the thickened oil smoothly enters the centrifugal pump and is lifted to the ground, and the normal operation of oil well production is ensured. The disadvantage of the prior art is that the three-stage stirring wheel rotates in the same direction, and the massive thickened oil cannot be effectively smashed. The utility model discloses a publication number CN212536083U, the thick oil anti-blocking device of an electric submersible pump protector, which comprises a shell, the left and right sides of the inside of the shell are respectively provided with a first cavity and a second cavity, the middle part of the inside of the shell is penetrated with a central shaft, the outer side wall of the central shaft is fixedly sleeved with a fastening cylinder, the fastening cylinder is positioned in the first cavity, the outer wall of the fastening cylinder is fixedly connected with a mounting cylinder, the outer wall of the mounting cylinder is fixedly connected with four V-shaped blade