CN114738271A - Novel oil-submersible electric screw pump underground oil production system - Google Patents

Abstract

The invention discloses a novel underground oil production system of an oil-submersible electric screw pump, and belongs to the technical field of underground oil production. The utility model provides a novel oily electric screw pump oil production system in pit, which comprises a fixed base, the disc bottom surface has set firmly the spiral piece, the disc below is annular equidistant structure and is equipped with a plurality of movable blocks, movable block medial extremity has set firmly splint, the movable block bottom surface is linear equidistant structure for the position of spiral piece and has seted up the arc wall, be equipped with the stopper between two adjacent movable blocks, stopper both sides tip has all set firmly the limiting plate, the limiting groove has been seted up for the position of limiting plate to the movable block outer wall, cavity top surface right side middle part and right wall middle part have all been seted up and have been run through the groove, the fixing base bottom surface has been seted up the mouth for the position of cavity, it is inside to be equipped with the oil recovery subassembly to run through the mouth. The invention not only effectively improves the drilling efficiency, but also reduces the difficulty in breaking the ground, and can prevent the oil pipe main body from being abraded due to the rotation of the electric submersible screw pump main body, thereby achieving multiple purposes and having strong practicability.

Description

Novel oil-submersible electric screw pump underground oil production system

Technical Field

The invention relates to the technical field of underground oil production, in particular to a novel underground oil production system with an oil-submersible electric screw pump.

Background

The electric submersible screw pump oil production system (ESPCP) directly drives the screw pump to lift liquid by utilizing the underground submersible motor, integrates the advantages of a rodless oil production system, the underground motor drive and the screw pump, saves energy by 30-60 percent compared with a sucker-rod pump, can break through the pumping depth of the sucker-rod pump, and can be applied to heavy oil wells, sand production wells, gas-containing wells, inclined wells and horizontal wells.

Through retrieval, the patent with publication number CN110219622A discloses a novel oil-submersible electric screw pump downhole oil production system, the device has no sucker rod, eliminates the loss caused by the abrasion of a rod pipe, saves energy, reduces consumption, cancels the traditional reducer and universal joint, reduces fault points, reduces the price cost of the whole machine, uses a permanent magnet synchronous motor, adopts a special bearing mechanism and a flexible connection mode, and parts are in a better working state, thereby prolonging the service life of a unit.

The existing oil production system needs to drill a hole in advance through external drilling equipment and then put into use, the process is low in efficiency, and when the electric submersible screw pump is put into use, the depth of the drilled hole is difficult to accurately control, so that the electric submersible screw pump connected with a ground control end through an oil pipe is difficult to easily send to an oil production position, the operation difficulty of workers is seriously increased, and in addition, if an internal hollow drilling rod is used for carrying the electric submersible screw pump to descend together, the problem that the oil pipe connected to the electric submersible screw pump rotates along with the electric submersible screw pump to generate abrasion is generated.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide a novel submersible electric screw pump underground oil production system to solve the problems in the background technology.

2. Technical scheme

A novel submersible electric screw pump downhole oil production system comprises a fixed seat, wherein a motor A is embedded at a position close to the bottom surface at the rear side inside the fixed seat, the output end of the motor A extends to the outside and is coaxially and fixedly connected with a threaded rod, a movable seat is arranged at the upper side inside the fixed seat, a threaded groove is formed in the rear part of the movable seat relative to the position of the threaded rod, a cavity is formed in the front end of the bottom surface of the movable seat, a disc is rotatably connected to the lower part of the cavity, a plurality of tooth grooves are formed in the upper part of the circumferential outer wall of the disc in an annular equidistant structure, a bevel gear is arranged above the front side of the disc, a motor B is fixedly arranged on the front wall of the movable seat relative to the position of the bevel gear, a screw block is fixedly arranged on the bottom surface of the disc, a plurality of movable blocks are arranged on the lower part of the disc in an annular equidistant structure, a clamping plate is fixedly arranged on the inner side end of each movable block, an arc groove is formed in the bottom surface of the movable block in a linear equidistant structure relative to the screw block, adjacent two be equipped with the stopper between the movable block, stopper both sides tip has all set firmly the limiting plate, the spacing groove has been seted up for the position of limiting plate to the movable block outer wall, cavity top surface right side middle part and right wall middle part have all been seted up and have been run through the groove, the fixing base bottom surface has been seted up for the position of cavity and has been run through the mouth, it is equipped with the oil recovery subassembly to run through mouthful inside.

Preferably, the fixing base is the setting of C style of calligraphy structure, the threaded rod upper end is rotated with the inboard top surface of fixing base and is connected, remove seat back wall and fixing base rear side inner wall sliding contact, threaded rod and thread groove threaded connection, the disc is the annular structure that round platform form for upper portion, the bevel gear is connected with the tooth's socket meshing, motor B output runs through and removes the seat antetheca and extend to the cavity inside and with the coaxial fixed connection of bevel gear.

Preferably, the movable block is of a T-shaped structure, the spiral block is meshed with the arc-shaped groove and connected with the arc-shaped groove, the limiting block is of a Y-shaped structure, the outer side end of the limiting block is fixedly connected with the inner wall of the cavity, and the limiting plate is in sliding fit with the limiting groove.

Preferably, the oil recovery subassembly is located the upside including being two drilling rods that equidistant structure set up the drilling rod upper end extends to the cavity inside and rather than top surface extrusion fit, is located the downside the drilling rod lower extreme extends to the inside and coaxial fixedly connected with drill bit of through hole, the drilling rod is the hollow cylinder structure, is located the upside drilling rod bottom surface edge has set firmly the picture peg, two the slot has all been seted up for the position of drilling rod to the drilling rod top surface, the picture peg is half-ring structure and grafting cooperation with the slot, the drilling rod outer wall runs through and has seted up guide slot A, guide slot A is the heliciform structure setting.

Preferably, the drilling rod inner wall has set firmly some two pillars through the symmetry and has set firmly the snap ring, the position of snap ring and pillar all is the staggered arrangement structure setting with guide slot A, the inside coaxial inner tube that is equipped with of drilling rod, the inner tube is the hollow cylinder structure of I shape, both ends outer wall all with drilling rod inner wall sliding contact about the inner tube, the annular has been seted up for the position of snap ring to the inner tube outer wall, snap ring and annular normal running fit, guide slot B has all been seted up at inner tube left side wall middle part and snap ring left side wall middle part, on the snap ring guide slot B all corresponds with guide slot A position.

Preferably, be located the downside drilling rod left side lower part is equidistant structure and is equipped with a plurality of guide arms, the guide arm right-hand member passes guide slot A and extends to the drilling rod inside and with guide slot B sliding fit, guide arm middle part and guide slot A sliding fit, it is a plurality of the montant has set firmly between the guide arm left end, the inboard bottom surface left end of fixing base has set firmly the sideboard, hydraulic stem A has set firmly between montant left wall middle part and the sideboard, the drill bit top surface is located the downside relatively the rotation groove has been seted up to the position of inner tube lower extreme, is located the downside the inner tube lower extreme has set firmly the plectane for the position of rotation groove, is located the downside the inner tube and the plectane respectively with the rotation groove about both sides normal running fit.

Preferably, a through hole is formed in the top surface of the drill bit relative to the position inside the inner barrel, an inner cavity is formed inside the circular plate, the inner cavity is of a middle-shaped structure, the diameter of the opening end of each of two sides of the inner cavity and the diameter of the through hole are equal to the inner diameter of the inner barrel, a plurality of hydraulic rods B are fixedly arranged on the inner wall of the inner cavity in an annular equidistant structure, a supporting plate is fixedly arranged at the inner side end of each hydraulic rod B, the supporting plate is of a fan-shaped structure, an electric submersible screw pump main body is arranged inside the inner barrel and located on the lower side of the inner barrel, an oil pipe main body is connected to the upper end of the electric submersible screw pump main body, and the upper end of the oil pipe main body sequentially penetrates through the two inner barrel, extends to the inside of the cavity, penetrates through the middle of the circular plate and extends to the outside through a through groove.

Preferably, the bottom of the inner cylinder, which is located at the upper side, is in an annular equidistant structure, a plurality of clamping plates are fixedly arranged, each clamping plate is of an L-shaped structure, a clamping groove is formed in the upper end of the outer wall of the inner cylinder relative to the clamping plate, each clamping plate and each clamping groove are of an L-shaped structure, the lower ends of the clamping plates and the clamping grooves are semi-cylindrical, the clamping plates are in clamping fit with the clamping grooves, and the outer side walls of the clamping plates are in clearance fit with the inner wall of the drill rod.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

1. the drilling device is provided with the guide rod, the drill rod provided with the guide groove A, the inner cylinder provided with the guide groove B, the clamping ring used for fixing the inner cylinder and the supporting plate in the inner cavity of the circular plate.

2. The invention is provided with the clamping plate and the clamping groove which are in clamping fit, and the inserting plate and the inserting groove which are in inserting fit, so that not only can a worker be helped to connect a plurality of drill rods to the upper end of the drill rod which is arranged in the device and is used for drilling into soil quickly, but also a guiding effect can be generated for two connected drill rods and two inner cylinders in the connection process, the phenomenon that the operation of the device is influenced by the dislocation of the guide groove A and the guide groove B is avoided, and the design is ingenious.

3. The invention is provided with the moving seat, the disc and the movable block, and the disc and the movable block can be mutually matched to clamp the end part of the drill rod at the uppermost side or slightly contact under the driving of the motor B, so that the moving seat can generate different effects in two works of pressing the drill rod to descend and pulling the drill rod out, thereby not only providing sufficient clamping force and pulling force for the drill rod to lift the drill rod out of the ground, but also achieving the aim of supporting the drill rod while avoiding the clamp plate from influencing the rotation of the drill rod.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic cross-sectional view of the movable base of the present invention;

FIG. 4 is a schematic exploded view of the drill stem of the present invention;

FIG. 5 is an enlarged schematic view of the structure at A of the present invention;

FIG. 6 is a schematic cross-sectional view of a circular plate according to the present invention.

The reference numbers in the figures illustrate: 1. a fixed seat; 2. a motor A; 3. a threaded rod; 4. a movable seat; 5. a thread groove; 6. a cavity; 7. a disc; 8. a tooth socket; 9. a bevel gear; 10. a motor B; 11. a screw block; 12. a movable block; 13. a splint; 14. an arc-shaped slot; 15. a limiting block; 16. a limiting plate; 17. a limiting groove; 18. a through groove; 19. a through opening; 20. an oil recovery assembly; 21. a drill stem; 22. a drill bit; 23. inserting plates; 24. a slot; 25. a guide groove A; 26. a support post; 27. a snap ring; 28. an inner barrel; 29. a ring groove; 30. a guide groove B; 31. a guide bar; 32. a vertical rod; 33. a sideboard; 34. a hydraulic rod A; 35. a rotating groove; 36. a circular plate; 37. a through hole; 38. an inner cavity; 39. a hydraulic rod B; 40. a support plate; 41. an electric submersible screw pump main body; 42. an oil pipe body; 43. clamping a plate; 44. a clamping groove.

Detailed Description

Referring to fig. 1-6, the present invention provides a technical solution:

a novel submersible electric screw pump underground oil production system comprises a fixed seat 1, a motor A2 is embedded at the position, close to the bottom surface, of the rear side inside the fixed seat 1, the output end of the motor A2 extends to the outside and is coaxially and fixedly connected with a threaded rod 3, a movable seat 4 is arranged at the upper side inside the fixed seat 1, a threaded groove 5 is formed in the position, opposite to the threaded rod 3, of the rear portion of the movable seat 4, a cavity 6 is formed in the front end of the bottom surface of the movable seat 4, a disc 7 is rotatably connected to the lower portion of the cavity 6, a plurality of tooth grooves 8 are formed in the annular equidistant structure in the upper portion of the circumferential outer wall of the disc 7, a bevel gear 9 is arranged above the front side of the disc 7, a motor B10 is fixedly arranged at the position, opposite to the bevel gear 9, a spiral block 11 is fixedly arranged on the bottom surface of the disc 7, a plurality of movable blocks 12 are arranged in the annular equidistant structure below the disc 7, a clamping plate 13 is fixedly arranged at the inner side end of the movable block 12, an arc-shaped groove 14 is formed in the linear equidistant structure of the movable block 12, be equipped with stopper 15 between two adjacent movable blocks 12, stopper 15 both sides tip has all set firmly limiting plate 16, and spacing groove 17 has been seted up for limiting plate 16's position to movable block 12 outer wall, and 6 top surface right sides middle parts of cavity and right wall middle part have all been seted up and have been run through groove 18, and through opening 19 has been seted up for 6 positions of cavity to fixing base 1 bottom surface, and through opening 19 is inside to be equipped with the oil recovery subassembly 20.

Specifically, fixing base 1 is the setting of C style of calligraphy structure, and threaded rod 3 upper end is connected with the inboard top surface rotation of fixing base 1, removes wall and fixing base 1 rear side inner wall sliding contact behind seat 4, threaded rod 3 and thread groove 5 threaded connection, and disc 7 is the annular structure that upper portion is round platform form, and bevel gear 9 is connected with the meshing of tooth's socket 8, and motor B10 output runs through and removes seat 4 antetheca and extend to inside the cavity 6 and with the coaxial fixed connection of bevel gear 9.

Further, the movable block 12 is of a T-shaped structure, the spiral block 11 is meshed with the arc-shaped groove 14 and is connected with the limiting block 15, the limiting block 15 is of a Y-shaped structure, the outer side end of the limiting block 15 is fixedly connected with the inner wall of the cavity 6, and the limiting plate 16 is in sliding fit with the limiting groove 17.

Further, oil recovery subassembly 20 is including being two drilling rods 21 that equidistant structure set up, the drilling rod 21 upper end that is located the upside extends to cavity 6 inside and rather than top surface extrusion fit, the drilling rod 21 lower extreme that is located the downside extends to through 19 inside and coaxial fixedly connected with drill bit 22, drilling rod 21 is the hollow cylinder structure, the drilling rod 21 bottom surface edge that is located the upside has set firmly picture peg 23, slot 24 has all been seted up for drilling rod 21's position to two drilling rod 21 top surfaces, picture peg 23 is half-circle ring structure and grafting cooperation with slot 24, drilling rod 21 outer wall runs through and has seted up guide slot A25, guide slot A25 is the heliciform structure setting.

Still further, the inner wall of the drill rod 21 is fixedly provided with two struts 26 through symmetrical arrangement, the positions of the struts 26 and the snap rings 27 are arranged in a staggered arrangement with the guide grooves A25, the inner portion of the drill rod 21 is coaxially provided with an inner cylinder 28, the inner cylinder 28 is an I-shaped hollow cylindrical structure, the outer walls of the upper end and the lower end of the inner cylinder 28 are in sliding contact with the inner wall of the drill rod 21, the outer wall of the inner cylinder 28 is provided with a ring groove 29 relative to the position of the snap ring 27, the snap ring 27 is in running fit with the ring groove 29, the middle portions of the left wall of the inner cylinder 28 and the left wall of the snap ring 27 are provided with guide grooves B30, and the guide grooves B30 on the snap ring 27 correspond to the positions of the guide grooves A25.

Still further, the lower portion of the left side of the drill rod 21 located on the lower side is provided with a plurality of guide rods 31 in an equidistant structure, the right ends of the guide rods 31 penetrate through the guide groove a25 and extend into the drill rod 21 and are in sliding fit with the guide groove B30, the middle portion of each guide rod 31 is in sliding fit with the guide groove a25, the vertical rods 32 are fixedly arranged between the left ends of the plurality of guide rods 31, the left end of the bottom surface of the inner side of the fixing seat 1 is fixedly provided with the side plate 33, the hydraulic rod a34 is fixedly arranged between the middle portion of the left wall of the vertical rod 32 and the side plate 33, the top surface of the drill bit 22 is provided with a rotating groove 35 at a position corresponding to the lower end of the inner cylinder 28 located on the lower side, the circular plate 36 is fixedly arranged at a position corresponding to the rotating groove 35 at the lower end of the inner cylinder 28 located on the lower side, and the circular plate 36 are respectively in rotating fit with the upper and lower sides of the rotating groove 35.

It is worth introducing that the top surface of the drill bit 22 is provided with a through hole 37 corresponding to the position inside the inner cylinder 28, an inner cavity 38 is provided inside the circular plate 36, the inner cavity 38 is of a middle-shaped structure, the diameter of the opening end on both sides of the inner cavity 38 and the diameter of the through hole 37 are equal to the inner diameter of the inner cylinder 28, the inner wall of the inner cavity 38 is fixedly provided with a plurality of hydraulic rods B39 in an annular equal-interval structure, the inner end of each hydraulic rod B39 is fixedly provided with a support plate 40, the support plate 40 is of a fan-shaped structure, an electric submersible screw pump body 41 is arranged inside the inner cylinder 28 on the lower side, the upper end of the electric submersible screw pump body 41 is connected with an oil pipe body 42, and the upper end of the oil pipe body 42 sequentially penetrates through the insides of the two inner cylinders 28 to extend into the cavity 6 and penetrates through the middle part of the circular plate 7 and the through groove 18 to extend to the outside.

It is worth explaining that the bottom surface of the inner cylinder 28 positioned on the upper side is in an annular equidistant structure and is fixedly provided with a plurality of clamping plates 43, each clamping plate 43 is in an L-shaped structure, the upper ends of the outer walls of the two inner cylinders 28 are provided with clamping grooves 44 relative to the positions of the clamping plates 43, each clamping plate 43 and each clamping groove 44 are in an L-shaped structure, the lower ends of the clamping plates 43 and the clamping grooves 44 are in a semi-cylindrical shape, the clamping plates 43 are in clamping fit with the clamping grooves 44, and the outer side walls of the clamping plates 43 are in clearance fit with the inner wall of the drill rod 21.

The working principle is as follows: the worker can drive the threaded rod 3 to rotate by using the motor A2, the movable seat 4 is driven to move upwards under the restriction of the rear inner wall of the fixed seat 1 through the threaded connection relationship between the threaded rod 3 and the threaded groove 5, then a gap enough for the lower drill rod 21 to pass through is opened, at this time, the drill bit 22 and the end part of the lower drill rod 21 can pass through the through hole 19 to be inserted into the ground, then the hydraulic rod A34A is extended to enable the guide rods 31 to penetrate into the drill rod 21 along the guide groove A25 and to be corresponding to the position of the guide groove B30, then the worker can drive the threaded rod 3 to rotate reversely by using the motor A2 to enable the movable seat 4 to move downwards, under the extrusion of the top surface of the drill rod 21 by the top surface of the cavity 6, the drill rod 21 can move downwards along the through hole 19 continuously, in the process, due to the extrusion of the screw-shaped guide groove A25 by the guide rods 31, the drill rod 21 can rotate while descending, and then the drill bit 22 can rotate synchronously, so that the speed of breaking the soil by the drill bit 22 of the device can be increased, the drill rod 21 of the device can be inserted into the soil layer more easily, meanwhile, under the sliding fit effect of the guide rod 31 and the guide groove B30, the inner cylinder 28 can ensure that the drill rod 21 does not rotate along with the drill rod 21 when drilling into the soil layer, under the arrangement of the snap ring 27 which is also provided with the guide groove B30, the position of the inner cylinder 28 can not change, and the structural strength of the drill rod 21 can also be increased, so that the electric submersible screw pump main body 41 in the lower inner cylinder 28 can not rotate, the oil pipe main body 42 is prevented from being worn due to the rotation of the electric submersible screw pump main body 41, when the drill rod 21 is drilled to a proper depth, a worker can operate the hydraulic rod A34B to shorten, then the hydraulic rod A34B can drive the supporting plate 40 to move into the inner cavity 38, and the electric submersible screw pump main body 41 which is out of the blockage can fall into the petroleum layer along the through hole 37, then, the worker can collect the oil by utilizing the electric submersible screw pump body 41 and input the oil into the accommodating equipment on the ground through the oil pipe body 42;

on the other hand, in the process of drilling the drill rod 21, if the length of the drill rod 21 cannot adapt to the depth of the oil position, the worker can move the drill rod 21 on the upper side to the fixed seat 1, disconnect the connection position of the oil pipe main body 42 and the ground control end in advance, pass the oil pipe main body 42 through the inner cylinder 28 on the upper side, lift the movable seat 4, insert the clamping plate 43 along the position of the clamping groove 44, pass the oil pipe main body 42 through the disc 7 and the through groove 18 again, and then descend the movable seat 4 to drive the two drill rods 21 to drill into the ground together, in the subsequent drilling operation, the worker can sequentially connect a plurality of drill rods 21 to the device in the same manner, so that the drilling depth of the device is more flexible, and it needs to be noted that the guide grooves B30 on the upper and lower inner cylinders 28 need to be located in the same direction in the process of clamping the two drill rods, meanwhile, the inserting plate 23 can be smoothly inserted into the inserting groove 24, so that the direction of the guide groove B30 can correspond to the guide rod 31, and the guide grooves A25 on the outer walls of the two drill rods 21 can be smoothly connected, thereby ensuring the normal operation of the device;

finally, when the oil extraction work is finished or the drill rod 21 needs to be lifted in advance, the worker only needs to make the hydraulic rod a34A drive the vertical rod 32 and the plurality of guide rods 31 to move leftwards, so that the guide rods 31 are not limited to the guide groove a25 and the guide groove B30, at this time, the motor B10 drives the bevel gear 9 to rotate, under the meshing connection between the bevel gear 9 and the tooth groove 8, the disc 7 can rotate in the cavity 6, then the spiral block 11 on the bottom surface of the disc 7 drives the plurality of movable blocks 12 to clamp towards the middle part through the arc-shaped groove 14 in meshing connection with the spiral block, and then the plurality of clamping plates 13 can clamp the outer wall of the uppermost drill rod 21, under the action of the plurality of limit blocks 15 fixedly arranged on the inner wall of the cavity 6, the movable blocks 12 can only move inwards but cannot move, after clamping, the worker can drive the movable seat 4 to move upwards by using the motor a2 to lift the drill rod 21 out of the ground along the through hole 19, in addition, the drill rod 21 will not rotate because the guide rod 31 is not limited during the ascending process, and the drill rod 21 will not be obstructed by the inner wall of the original drilled hole, so that the drill rod 21 and the drill bit 22 can be conveniently and quickly lifted out of the ground, and the electric submersible screw pump body 41 can be pulled out by pulling the oil pipe body 42.

Claims (8)

1. The utility model provides a novel oil-submersible electric screw pump oil production system in pit, includes fixing base (1), its characterized in that: the utility model discloses a motor for the electric bicycle, including fixing base (1), motor A (2) output extend to outside and coaxial fixedly connected with threaded rod (3), the inside upside of fixing base (1) is equipped with removes seat (4), remove seat (4) rear portion and seted up thread groove (5) for the position of threaded rod (3), remove seat (4) bottom front end and seted up cavity (6), cavity (6) lower part rotation is connected with disc (7), disc (7) circumference outer wall upper portion is the equidistant structure of ring type and has seted up a plurality of tooth's socket (8), disc (7) front side top is equipped with bevel gear (9), it has motor B (10) to remove seat (4) antetheca position for bevel gear (9), disc (7) bottom surface has set firmly spiral piece (11), disc (7) below is annular equidistant structure and is equipped with a plurality of movable blocks (12), movable block (12) medial extremity has set firmly splint (13), movable block (12) bottom surface is linear equidistant structure for the position of spiral piece (11) and has seted up arc wall (14), adjacent two be equipped with stopper (15) between movable block (12), stopper (15) both sides tip has all set firmly limiting plate (16), spacing groove (17) have been seted up for the position of limiting plate (16) to movable block (12) outer wall, cavity (6) top surface right side middle part and right wall middle part have all been seted up and have been run through groove (18), through mouth (19) have been seted up for the position of cavity (6) to fixing base (1) bottom surface, through mouth (19) inside is equipped with oil recovery subassembly (20).

2. The novel submersible electric screw pump downhole production system of claim 1, characterized in that: fixing base (1) is the setting of C style of calligraphy structure, threaded rod (3) upper end is rotated with the inboard top surface of fixing base (1) and is connected, remove seat (4) back wall and fixing base (1) rear side inner wall sliding contact, threaded rod (3) and thread groove (5) threaded connection, disc (7) are the annular structure of round platform form for upper portion, bevel gear (9) are connected with tooth's socket (8) meshing, motor B (10) output run through and remove seat (4) antetheca and extend to cavity (6) inside and with the coaxial fixed connection of bevel gear (9).

3. The novel submersible electric screw pump downhole production system of claim 1, characterized in that: the movable block (12) is of a T-shaped structure, the spiral block (11) is meshed with the arc-shaped groove (14) and is connected with the limiting block (15) in a Y-shaped structure, the outer side end of the limiting block (15) is fixedly connected with the inner wall of the cavity (6), and the limiting plate (16) is in sliding fit with the limiting groove (17).

4. The novel submersible electric screw pump downhole oil production system of claim 1, characterized in that: oil recovery subassembly (20) is including being two drilling rods (21) that equidistant structure set up, is located the upside drilling rod (21) upper end extends to cavity (6) inside and rather than top surface extrusion fit, is located the downside drilling rod (21) lower extreme extends to through mouthful (19) inside and coaxial fixedly connected with drill bit (22), drilling rod (21) are the hollow cylinder structure, is located the upside drilling rod (21) bottom surface edge has set firmly picture peg (23), two slot (24) have all been seted up for the position of drilling rod (21) to drilling rod (21) top surface, picture peg (23) are semicircle ring structure and the cooperation of pegging graft with slot (24), drilling rod (21) outer wall runs through and has seted up guide slot A (25), guide slot A (25) are the heliciform structure and set up.

5. The novel submersible electric screw pump downhole oil production system according to claim 4, characterized in that: drilling rod (21) inner wall sets firmly some two pillar (26) through the symmetry and has set firmly snap ring (27), the staggered arrangement structure setting is all be with guide slot A (25) in snap ring (27) and the position of pillar (26), drilling rod (21) inside coaxial inner tube (28) that is equipped with, inner tube (28) are the hollow cylinder structure of I shape, both ends outer wall all with drilling rod (21) inner wall sliding contact about inner tube (28), annular (29) have been seted up for the position of snap ring (27) to inner tube (28) outer wall, snap ring (27) and annular (29) normal running fit, guide slot B (30) have all been seted up at inner tube (28) left side wall middle part and snap ring (27) left side wall middle part, on snap ring (27) guide slot B (30) all correspond with guide slot A (25) position.

6. The novel submersible electric screw pump downhole oil production system according to claim 5, characterized in that: a plurality of guide rods (31) are arranged at the lower part of the left side of the drill rod (21) at the lower side in an equidistant structure, the right end of the guide rod (31) passes through the guide groove A (25) to extend into the drill rod (21) and is in sliding fit with the guide groove B (30), the middle parts of the guide rods (31) are in sliding fit with the guide grooves A (25), vertical rods (32) are fixedly arranged among the left ends of the guide rods (31), a side plate (33) is fixedly arranged at the left end of the bottom surface of the inner side of the fixed seat (1), a hydraulic rod A (34) is fixedly arranged between the middle part of the left wall of the vertical rod (32) and the side plate (33), the top surface of the drill bit (22) is provided with a rotating groove (35) at a position corresponding to the lower end of the inner cylinder (28) at the lower side, a circular plate (36) is fixedly arranged at a position corresponding to the rotating groove (35) at the lower end of the inner cylinder (28) at the lower side, and the inner cylinder (28) and the circular plate (36) at the lower side are respectively in rotating fit with the upper side and the lower side of the rotating groove (35).

7. The novel submersible electric screw pump downhole oil production system according to claim 6, characterized in that: the top surface of the drill bit (22) is provided with a through hole (37) relative to the inner part of the inner cylinder (28), an inner cavity (38) is arranged in the circular plate (36), the inner cavity (38) is of a Chinese character 'Zhong' structure, the diameter of the opening ends at the two sides of the inner cavity (38) and the diameter of the through hole (37) are equal to the inner diameter of the inner cylinder (28), a plurality of hydraulic rods B (39) are fixedly arranged on the inner wall of the inner cavity (38) in an annular equidistant structure, a supporting plate (40) is fixedly arranged at the inner side end of the hydraulic rod B (39), the supporting plate (40) is of a fan-shaped structure, an electric submersible screw pump main body (41) is arranged in the inner cylinder (28) positioned at the lower side, the upper end of the electric submersible screw pump main body (41) is connected with an oil pipe main body (42), the upper end of the oil pipe main body (42) sequentially penetrates through the two inner cylinders (28) and extends to the inside of the cavity (6), the middle of the disc (7) and the penetrating groove (18) and extends to the outside.

8. The novel submersible electric screw pump downhole oil production system of claim 7, characterized in that: the clamping device is characterized in that the bottom surface of the inner cylinder (28) on the upper side is of an annular equidistant structure, a plurality of clamping plates (43) are fixedly arranged, each clamping plate (43) is of an L-shaped structure, a clamping groove (44) is formed in the upper end of the outer wall of the inner cylinder (28) relative to the clamping plate (43), each clamping plate (43) and each clamping groove (44) are of an L-shaped structure, the lower ends of the clamping plates (43) and the clamping grooves (44) are in semi-cylindrical shape, the clamping plates (43) are in clamping fit with the clamping grooves (44), and the outer side wall of each clamping plate (43) is in clearance fit with the inner wall of a drill rod (21).

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