CN110374533B

CN110374533B - Underground hydraulic pump

Info

Publication number: CN110374533B
Application number: CN201910655327.5A
Authority: CN
Inventors: 朱玉军; 刘春雨; 张光恒
Original assignee: FUXIN PETROLEUM TOOLS FACTORY
Current assignee: FUXIN PETROLEUM TOOLS FACTORY
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2024-04-16
Anticipated expiration: 2039-07-19
Also published as: CN110374533A

Abstract

The underground hydraulic pump is characterized in that the upper end of a central hole of an upper joint is inserted into a faucet, the lower end of the upper joint is inserted into a central pipe, the lower end of the central pipe is sleeved with a connecting sleeve, and an oil cylinder is arranged between the connecting sleeve and the upper joint. The piston is sleeved on the central tube. The upper end of the upper outer sleeve is sleeved at the lower end of the connecting sleeve, and the lower end of the upper outer sleeve is inserted into the lower outer sleeve. The upper end of the lower outer sleeve is provided with a lower inner sleeve. The upper end of the lower inner sleeve is provided with an upper inner sleeve. The bevel pinion shaft is fixedly arranged inside the two first bearing inner rings. The small bevel gear shaft is sleeved with a screw cap. The upper end of the upper inner sleeve is connected with a planetary gear box and a motor through bolts, and the outer side of the lower outer sleeve is connected with a bearing end cover through threads. The device comprises a second bearing, a gear shaft, a large bevel gear and a crank, wherein the large bevel gear and the small bevel gear are combined with a bevel gear transmission mechanism. The plunger jacket and the tee joint are arranged in the lower jacket, and the lower end of the plunger jacket is connected with the lower joint through threads. The hydraulic release packer is connected to hydraulic pump lower extreme in pit, and it is convenient to play down, and is fast, does not have the use risk.

Description

Underground hydraulic pump

Technical Field

The invention belongs to the technical field of oilfield downhole tools, and particularly relates to a downhole hydraulic pump.

Background

At present, two modes are adopted for the hydraulic release type packer which is put in the well at home and abroad, one mode is an oil pipe sealing mode, the hydraulic release type packer is connected with the oil pipe to put in the well, a hydraulic truck is used for pressing, the packer is used for sealing and releasing, and then the oil pipe and a release pipe column are lifted out, so that the mode has long operation time and high operation cost; the other adopts a gunpowder sealing mode, which has the problem of high risk and requires qualification of gunpowder.

Disclosure of Invention

The invention aims to provide an underground hydraulic pump, the lower end of the underground hydraulic pump is connected with a hydraulic release packer, the underground hydraulic pump is connected with a conveying well by a cable, the ground is started to control the underground hydraulic pump to work by a cable conveying power supply, meanwhile, pressure data of the underground hydraulic pump is transmitted to the ground by the cable, a base seal hydraulic release packer is pressed and released, and then the underground hydraulic pump and the release of the hydraulic release packer are lifted out by the cable.

The technical scheme adopted is as follows:

the utility model provides a hydraulic pump in pit, includes horse tap, top connection, hydro-cylinder, center tube, adapter sleeve, go up overcoat, go up endotheca, lower endotheca, pinion axle, overcoat down, plunger overcoat, tee bend, lower connection, big bevel gear, gear shaft, bearing end cover, its characterized in that:

the upper end of the central hole of the upper joint is inserted into and in threaded connection with a nylon, the lower end of the upper joint is inserted into and in threaded connection with a central pipe, the lower end of the central pipe is sleeved with and in threaded connection with a connecting sleeve, an oil cylinder is installed between the connecting sleeve and the upper joint, and an oil cylinder sleeve is arranged outside the central pipe. And a piston is arranged among the upper joint, the connecting sleeve, the oil cylinder and the central tube. The piston is sleeved on the central tube. The annular cavity among the piston, the oil cylinder, the central tube and the connecting sleeve is filled with hydraulic oil, and the hydraulic oil is needed to be used when the pump works. When in operation, the oil cylinder, the central tube and the connecting sleeve are fixed, and the piston moves downwards. The upper end of the upper outer sleeve is sleeved and in threaded connection with the lower end of the connecting sleeve, and the lower end of the upper outer sleeve is inserted and in threaded connection with the lower outer sleeve. The inner side of the upper end of the lower outer sleeve is connected with the lower inner sleeve through threads. The inner side of the upper end of the lower inner sleeve is connected with the upper inner sleeve in a threaded manner, and two first bearings are arranged at the inner shoulder of the lower end of the lower inner sleeve and fixedly connected with the outer ring of the first bearings. The bevel pinion shaft is fixedly arranged inside the two first bearing inner rings. The small bevel gear shaft is sleeved with a nut in threaded connection, and the two first bearings are fixedly connected. The upper end of the upper inner sleeve is connected with a planetary gear box and a motor through bolts, and a power output shaft of the motor is connected with a power input shaft of the planetary gear box. The planetary gear box and the motor are outsourcing products and are connected by a manufacturer. The power output shaft at the lower end of the planetary gear box is connected with the upper end of the pinion shaft through a coupler. The outer side of the lower outer sleeve is connected with a bearing end cover in a threaded manner. Two second bearings are installed in the bearing end cover and fixedly connected with the outer ring of the second bearings. The gear shaft is transversely fixedly inserted into the inner rings of the two second bearings. The big bevel gear is sleeved on the gear shaft. The key groove at the head of the large bevel gear is connected with the gear shaft through a key. The big bevel gear is meshed with the small bevel gear at the lower end of the small bevel gear shaft. The crank sleeve is arranged in the middle of the gear shaft, and the crank is eccentrically arranged. The device comprises a second bearing, a gear shaft, a large bevel gear and a crank, wherein the large bevel gear and the small bevel gear are combined with a bevel gear transmission mechanism. The plunger jacket and the tee joint are arranged in the lower jacket, and the lower end of the plunger jacket is connected with the lower joint through threads. The tee is positioned below the plunger jacket. A plunger sealing sleeve is arranged between the plunger outer sleeve and the tee joint. The lower end of the crank is connected with the plunger through a pin, and the plunger is inserted into the plunger jacket and the plunger sealing sleeve. The upper end channel of the tee joint, the plunger sealing sleeve and the lower end inner cavity of the plunger outer sleeve are communicated. A first one-way valve is arranged in a passage opening at the lower end of the tee joint, and liquid can flow from the upper end to the lower end. A second one-way valve is arranged in the side hole of the tee joint, and liquid can flow from the upper end to the lower end. A pressure sensor is arranged in the side hole of the lower joint. The signal terminal of the pressure sensor is connected with the corresponding signal terminal of the tap through a pressure sensor cable, the motor live wire on the motor is connected with the corresponding signal terminal of the tap, and the motor zero line on the motor is connected with the upper inner sleeve.

The invention has the advantages that:

the hydraulic release type packer is connected to the lower end of the underground hydraulic pump, the underground hydraulic pump is connected with a cable and conveyed into a well, the ground is started through a cable conveying power supply to control the underground hydraulic pump to work, meanwhile, pressure data of the underground hydraulic pump are transmitted to the ground through the cable, the ground is controlled to complete the hydraulic release type packer to be set and released, and the underground hydraulic pump and the release of the hydraulic release type packer are lifted out through the cable, so that the hydraulic release type packer is convenient to lift and fast in speed, and does not have use risks.

Drawings

FIG. 1 is a block diagram of a downhole hydraulic pump.

FIG. 2 is a side view of a hydraulic pump downhole.

In fig. 1: 1-cock, 2-upper joint, 3-piston, 4-cylinder, 5-center tube, 6-connecting sleeve, 7-motor, 8-planetary gear box, 9-coupler, 10-upper outer sleeve, 11-upper inner sleeve, 12-lower inner sleeve, 13-nut, 14-pinion shaft, 15-first bearing, 16-lower outer sleeve, 17-plunger outer sleeve, 18-plunger, 19-plunger seal sleeve, 20-second check valve, 21-tee, 22-first check valve, 23-lower joint, 24-pin, 25-crank, 26-large bevel gear, 27-gear shaft, 28-key, 29-bearing, 30-bearing end cap, 31-bolt, 32-motor zero line, 33-motor fire wire, 34-pressure sensor, 35-pressure sensor.

Detailed Description

The utility model provides a hydraulic pump in pit, includes horse tap 1, top connection 2, hydro-cylinder 4, center tube 5, adapter sleeve 6, go up overcoat 10, go up endotheca 11, lower endotheca 12, little bevel gear axle 14, overcoat 16 down, plunger overcoat 17, tee bend 21, lower connection 23, big bevel gear 26, gear shaft 27, bearing cap 30, its characterized in that:

the upper end of the central hole of the upper joint 2 is inserted and in threaded connection with a faucet 1, the lower end of the upper joint is inserted and in threaded connection with a central tube 5, the lower end of the central tube 5 is sleeved with a connecting sleeve 6 in threaded connection with the central tube, an oil cylinder 4 is installed between the connecting sleeve 6 and the upper joint 2, and the oil cylinder 4 is sleeved outside the central tube 5. A piston 3 is arranged among the upper joint 2, the connecting sleeve 6, the oil cylinder 4 and the central tube 5. The piston 3 is sleeved on the central tube 5. The annular cavity among the piston 3, the oil cylinder 4, the central tube 5 and the connecting sleeve 6 is filled with hydraulic oil, and the hydraulic oil is needed to be used when the pump works. The cylinder, the central tube and the connecting sleeve are fixed during operation, and the piston 3 moves downwards. The upper end of the upper outer sleeve 10 is sleeved and in threaded connection with the lower end of the connecting sleeve 3, and the lower end is inserted and in threaded connection with the lower outer sleeve 16. The inner side of the upper end of the lower outer sleeve 16 is connected with the lower inner sleeve 12 through threads. The inner side of the upper end of the lower inner sleeve 12 is connected with an upper inner sleeve 11 in a threaded manner, and two first bearings 15 are installed at the inner shoulder of the lower end of the lower inner sleeve 12 and fixedly connected with the outer ring of the first bearings 15. The pinion shaft 14 is fixedly mounted inside the inner rings of the two first bearings 15. The pinion shaft 14 is sleeved with a nut 13 in threaded connection, and two first bearings 15 are fixedly connected. The upper end of the upper inner sleeve 11 is connected with a planetary gear box 8 and a motor 7 through a bolt 31, and a power output shaft of the motor 7 is connected with a power input shaft of the planetary gear box 8. The planetary gear box and the motor are outsourcing products and are connected by a manufacturer. The power output shaft at the lower end of the planetary gear box 8 is connected with the upper end of the bevel pinion shaft 14 through a coupler 9. The bearing end cap 30 is screwed on the outer side of the lower outer sleeve 16. Two second bearings 29 are installed in the bearing cap 30 and fixedly connected to the outer ring of the second bearings 29. The gear shafts 27 are fixedly inserted laterally inside the inner rings of the two second bearings 29. The large bevel gear 26 is sleeved on the gear shaft 27. The head key groove of the large bevel gear 26 is connected with the gear shaft 27 through a key 28. The large bevel gear 26 is engaged with the small bevel gear at the lower end of the small bevel gear shaft 14. The crank 25 is sleeved in the middle of the gear shaft 27, and the crank 25 is eccentrically arranged. A second bearing 29, a gear shaft 27, a large bevel gear 26, a crank 25, the large bevel gear 26 and the small bevel gear shaft 14 combine a bevel gear transmission mechanism. The plunger jacket 17 and the tee joint 21 are arranged in the lower jacket 16, and the lower end of the plunger jacket is connected with the lower joint 23 in a threaded manner. The tee 21 is located below the plunger housing 17. A plunger seal sleeve 19 is mounted between the plunger housing 17 and the tee 21. The lower end of the crank 25 is connected to the plunger 18 by a pin 24, and the plunger 18 is inserted into the plunger housing 17 and the plunger seal housing 19. The upper end channel of the tee joint 21, the plunger sealing sleeve 19 and the inner cavity of the lower end of the plunger outer 17 are communicated. A first one-way valve 22 is arranged in the passage opening at the lower end of the tee joint 21, and liquid can flow from the upper end to the lower end. A second one-way valve 20 is arranged in the side hole of the tee joint 21, and liquid can flow from the upper end to the lower end. A pressure sensor 34 is installed in the side hole of the lower joint 23. The signal terminal of the pressure sensor 34 is connected with the corresponding signal terminal of the tap 1 through a pressure sensor cable 35, the motor live wire 33 on the motor 7 is connected with the corresponding signal terminal of the tap 1, and the motor zero wire 32 on the motor 7 is connected with the upper inner sleeve 11.

The lower end of the underground hydraulic pump is connected with the hydraulic release packer, the upper end of the underground hydraulic pump is connected with the hydraulic release packer through a cable, the underground hydraulic pump is lowered to a designed position, the ground is connected with a constant-current and voltage-stabilizing power supply, a starting power supply is transmitted to a motor through a cock, the motor is started, a small bevel gear shaft is acted by a planetary gear box and a coupler, the motor is meshed with a large bevel gear through two bevel gears, the gear shaft is driven to rotate through a key, a crank is driven, and a plunger connected through a pin reciprocates up and down.

When the plunger moves upwards, the first one-way valve is closed, and the second one-way valve absorbs oil from the upper end. The oil in the oil cylinder enters the tee joint through the gap between the parts and the oil passing channel on the plunger jacket.

When the plunger moves downwards, the second one-way valve is closed, the first one-way valve supplies oil to the inner cavity of the lower joint, the hydraulic release type packer is pressurized and sealed, the pressure sensor transmits pressure data to the ground through a pressure sensor cable, a faucet and a cable, and the hydraulic release type packer releases the underground hydraulic pump and the release part of the hydraulic release type packer through the cable after release.

Technical parameters:

1. pump cylinder volume: 4L.

2. Rated voltage: 70V (V)

3. Rated current 1.89 a.

4. Working pressure: 35MPa.

5. Operating temperature: 120 ℃.

Claims

1. The utility model provides a hydraulic pump in pit, includes horse tap (1), top connection (2), hydro-cylinder (4), center tube (5), adapter sleeve (6), go up overcoat (10), go up endotheca (11), endotheca (12) down, bevel pinion axle (14), overcoat (16) down, plunger overcoat (17), tee bend (21), lower junction (23), bevel gear (26), gear shaft (27), bearing end cover (30), its characterized in that: the upper end of the central hole of the upper joint (2) is inserted into and in threaded connection with a nylon head (1), the lower end of the upper joint is inserted into and in threaded connection with a central tube (5), the lower end of the central tube (5) is sleeved with and in threaded connection with a connecting sleeve (6), an oil cylinder (4) is arranged between the connecting sleeve (6) and the upper joint (2), and the oil cylinder (4) is sleeved outside the central tube (5); a piston (3) is arranged among the upper joint (2), the connecting sleeve (6), the oil cylinder (4) and the central tube (5); the piston (3) is sleeved on the central tube (5); the upper end of the upper outer sleeve (10) is sleeved and in threaded connection with the lower end of the connecting sleeve (6), and the lower end is inserted and in threaded connection with the lower outer sleeve (16); the inner side of the upper end of the lower outer sleeve (16) is connected with the lower inner sleeve (12) through threads; an upper inner sleeve (11) is connected with the inner side of the upper end of the lower inner sleeve (12) in a threaded manner, and two first bearings (15) are arranged at the inner shoulder of the lower end of the lower inner sleeve (12) and fixedly connected with the outer ring of the first bearings (15); the bevel pinion shaft (14) is fixedly arranged inside the inner rings of the two first bearings (15); the bevel pinion shaft (14) is sleeved with a nut (13) in threaded connection; the upper end of the upper inner sleeve (11) is connected with a planetary gear box (8) and a motor (7) through a bolt (31), and a power output shaft of the motor (7) is connected with a power input shaft of the planetary gear box (8); the power output shaft at the lower end of the planetary gear box (8) is connected with the upper end of the bevel pinion shaft (14) through a coupler (9); the outer side of the lower outer sleeve (16) is in threaded connection with a bearing end cover (30); two second bearings (29) are arranged in the bearing end cover (30) and fixedly connected with the outer ring of the second bearings (29); the gear shafts (27) are transversely and fixedly inserted into the inner rings of the two second bearings (29); the big bevel gear (26) is sleeved on the gear shaft (27); the head key groove of the large bevel gear (26) is connected with the gear shaft (27) through a key (28);

the big bevel gear (26) is connected with the small bevel gear at the lower end of the small bevel gear shaft (14) in a meshed manner; the crank (25) is sleeved in the middle of the gear shaft (27), and the crank (25) is eccentrically arranged; a plunger jacket (17) and a tee joint (21) are arranged in the lower jacket (16), and the lower end of the plunger jacket is connected with a lower joint (23) through threads; the tee joint (21) is positioned below the plunger jacket (17); a plunger seal sleeve (19) is arranged between the plunger jacket (17) and the tee joint (21); the lower end of the crank (25) is connected with the plunger (18) through a pin (24), and the plunger (18) is inserted into the plunger jacket (17) and the plunger sealing sleeve (19); the upper end channel of the tee joint (21), the plunger seal sleeve (19) and the inner cavity of the lower end of the plunger jacket (17) are communicated;

a first one-way valve (22) is arranged in a passage port at the lower end of the tee joint (21), and liquid can flow from the upper end to the lower end; a second one-way valve (20) is arranged in a side hole of the tee joint (21), and liquid can flow from the upper end to the lower end; a pressure sensor (34) is arranged in the side hole of the lower joint (23).