CN117052353A - Rod-type relay load-shedding deep drawing device - Google Patents

Rod-type relay load-shedding deep drawing device Download PDF

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Publication number
CN117052353A
CN117052353A CN202311234154.2A CN202311234154A CN117052353A CN 117052353 A CN117052353 A CN 117052353A CN 202311234154 A CN202311234154 A CN 202311234154A CN 117052353 A CN117052353 A CN 117052353A
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CN
China
Prior art keywords
pump cylinder
piston
pump
pipe
seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311234154.2A
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Chinese (zh)
Inventor
熊兴菊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Hengtai Lifting Petroleum Technology Co ltd
Original Assignee
Shandong Hengtai Lifting Petroleum Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong Hengtai Lifting Petroleum Technology Co ltd filed Critical Shandong Hengtai Lifting Petroleum Technology Co ltd
Priority to CN202311234154.2A priority Critical patent/CN117052353A/en
Publication of CN117052353A publication Critical patent/CN117052353A/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The invention relates to a rod type relay load-reducing deep pumping device, which comprises a load-reducing upper pump cylinder, a load-reducing upper piston, a breathing joint, an upper seal, a seal shaft, a lower seal, a separation pipe, a load-reducing lower pump cylinder, a load-reducing lower piston, an outlet pipe, a seal socket, a rod type seal body, an outer cylinder, a connecting rod, an upper pump cylinder, an upper plunger, a connecting pipe, a reducing joint, a lower pump cylinder, a discharge valve, a lower piston, an oil inlet valve and a communicating joint. The invention can be matched with a rod type oil pump, when the relay load-reducing deep pumping is carried out, if a pump is to be detected, the pump cylinder, the piston and the valve can be lifted for maintenance by only lifting the pumping rod without lifting the oil pipe.

Description

Rod-type relay load-shedding deep drawing device
Technical Field
The invention relates to an oil pumping device for an oil field, in particular to a rod type relay load-shedding deep pumping device.
Background
The reciprocating sucker rod pumping device for oil field includes pumping unit, sucker rod, oil pump and oil pipe, and the pumping unit is installed on ground and in the shaft of oil well. In the process of pumping oil by adopting a reciprocating sucker rod pump in a deep well and an ultra-deep well (deep pumping and ultra-deep pumping means pumping oil by lowering the pump below kilometers or even below thousands of meters), the load born by an oil pumping unit, a sucker rod, an oil well pump and an oil pipe is large, the stroke loss generated by elastic expansion and contraction of the sucker rod and the oil pipe is large, the gap leakage between a piston and a pump barrel of the oil pumping unit is large, the pump efficiency and the system efficiency are low, the problems of disconnection and eccentric wear caused by unstable bending of the sucker rod at the lower part are outstanding, and the service lives of the oil pipe, the sucker rod and the oil pump at the lower part are short.
For this reason, the technical staff studied a relay load-reducing deep drawing device, such as chinese patent application 2023100430598 (name: a reciprocating sucker-rod pump relay load-reducing deep drawing device), for solving the above-mentioned technical problems. However, the existing relay load-reducing deep pumping device is tubular, the pump barrel of the device is lowered along with the oil pipe and cannot be lowered along with the sucker rod, the pump for pumping oil at the lower part of the device is only a tubular pump, and the oil pipe is required to be lowered when the oil pump is lowered, so that the device has the advantages of large operation workload, long operation time and high cost.
Disclosure of Invention
The invention aims to design a rod type relay load-reducing deep drawing device, which overcomes the problems in the prior art, reduces the work load of lifting and lowering a production string, shortens the well repairing time and reduces the well repairing cost.
The purpose of the invention is realized in the following way: comprises an unloading upper pump cylinder, an unloading upper piston, a breathing joint, an upper seal, a seal shaft, a lower seal, a separation pipe, an unloading lower pump cylinder, an unloading lower piston, an outlet pipe, a seal socket, a rod type seal body, an outer cylinder, a connecting rod, an upper pump cylinder, an upper plunger, a connecting pipe, a reducing joint, a lower pump cylinder, a discharge valve, a lower piston, an oil inlet valve and a communication joint, wherein the outer diameter of the unloading upper piston is smaller than that of the unloading lower piston, the unloading upper pump cylinder is arranged on the seal shaft, an inner breathing hole is arranged on the seal shaft, an upper seal and a lower seal are arranged on the seal shaft, the upper seal is arranged above the inner breathing hole, the lower seal is arranged below the inner breathing hole, the lower part of the seal shaft is connected with the upper part of the unloading lower pump cylinder, the lower part of the unloading upper piston is connected with the upper part of the unloading lower piston, the unloading upper pump cylinder 1 is sleeved outside the unloading upper piston, the unloading upper pump cylinder is matched with the unloading upper piston, the unloading lower pump cylinder is sleeved outside the unloading lower piston, the unloading lower pump cylinder is sealed with the unloading lower piston in a matched manner, the upper part of the connecting rod is connected with the lower part of the unloading lower piston, the lower part of the connecting rod is connected with the upper part of the upper piston, the upper part of the outlet pipe is connected with the lower part of the unloading lower pump cylinder, the lower part of the outlet pipe is connected with the upper part of the rod type sealing body, the upper pump cylinder is sleeved outside the upper piston, the upper pump cylinder is sealed with the upper piston in a matched manner, the lower parts of the upper pump cylinder and the connecting pipe are connected with the upper part of the reducer union, the lower part of the upper piston is sequentially connected with the discharge valve, the lower piston and the communication union, the lower piston is provided with the oil inlet valve, the lower pump cylinder is sleeved outside the lower piston, the lower pump cylinder is sealed with the lower piston in a matched manner, the upper part of the lower pump cylinder is connected with the lower part of the reducer union, the lower pump cylinder is different from the pump diameter of the upper pump cylinder, so that the oil inlet cavity is formed, the upper part of the isolation pipe is connected with the lower part of the isolation pipe, the upper part of the outer cylinder is connected with the outside of the respiratory joint, the connection point is positioned above the outer respiratory hole, an upper respiratory tract is formed between the outer wall of the isolation pipe and the inner wall of the outer cylinder, the respiratory joint, the isolation pipe, the outer cylinder are arranged between the wellhead of the pumping pipe, the upper sealing, the sealing shaft, the lower sealing, the unloading lower pump cylinder, the outlet pipe, the rod type sealing body, the connecting rod, the upper plunger, the connecting pipe, the variable joint, the lower pump cylinder, the discharge valve, the lower piston, the oil inlet valve, the oil inlet pipe, the sealing joint is formed between the outer wall of the upper sealing pipe and the outer cylinder, the upper sealing pipe is arranged between the inner wall of the upper sealing pipe and the outer cylinder, the sealing joint is formed between the sealing joint of the sealing pipe and the outer cylinder, the sealing joint is formed between the inner wall of the sealing pipe and the outer cylinder is formed between the sealing joint of the sealing pipe, the upper seal is positioned above the outer breathing hole, and the lower seal is positioned below the outer breathing hole, so that the lower part of the load-shedding upper pump cylinder and the upper part of the load-shedding lower pump cylinder are communicated with the lower part of the lower respiratory tract only, and the lower part of the lower respiratory tract is positioned at the oil inlet communication hole.
The beneficial effects of the invention are as follows: the invention is arranged on an oil pipe and an oil pumping rod between a wellhead and an oil well pump, can reduce stroke loss and gap leakage of the oil pumping pump arranged under the invention, and improves the pumping efficiency of the oil well pump. The invention can be matched with a rod type oil pump, when the relay load-reducing deep pumping is carried out, if a pump is to be detected, the pump cylinder, the piston and the valve can be lifted for maintenance by only lifting the pumping rod without lifting the oil pipe.
Drawings
Fig. 1 is an assembly view of an embodiment of the present invention.
Fig. 2 is an upper portion of fig. 1.
Fig. 3 is a lower part of fig. 1.
Description of the embodiments
Embodiments of the present invention will be described below with reference to the drawings.
As shown in fig. 1, the embodiment of the invention comprises an upper relief pump cylinder 1, an upper relief piston 2, a breathing joint 3, an upper seal 4, a seal shaft 5, a lower seal 6, a separation pipe 7, a lower relief pump cylinder 8, a lower relief piston 9, an outlet pipe 10, a seal socket 11, a rod seal body 12, an outer cylinder 13, a connecting rod 14, an upper pump cylinder 15, an upper plunger 16, a connecting pipe 17, a reducing joint 18, a lower pump cylinder 19, a discharge valve 20, a lower piston 21, an oil inlet valve 22, and a communication joint 23, wherein the outer diameter of the upper relief piston 2 is smaller than the outer diameter of the lower relief piston 9, the upper relief pump cylinder 1 is mounted on the seal shaft 5, an inner breathing hole 5-1 is arranged on the seal shaft 5, the upper seal 4 and the lower seal 6 are mounted on the seal shaft 5, the upper seal 4 is positioned above the inner breathing hole 5-1, the lower seal 6 is positioned below the inner breathing hole 5-1, the lower part of the seal shaft 5 is connected with the upper part of the lower relief pump cylinder 8, the lower part of the load-reducing upper piston 2 is connected with the upper part of the load-reducing lower piston 9, the load-reducing upper pump cylinder 1 is sleeved outside the load-reducing upper piston 2, the load-reducing upper pump cylinder 1 is matched and sealed with the load-reducing upper piston 2, the load-reducing lower pump cylinder 8 is sleeved outside the load-reducing lower piston 9, the load-reducing lower pump cylinder 8 is matched and sealed with the load-reducing lower piston 9, the upper part of the connecting rod 14 is connected with the lower part of the load-reducing lower piston 9, the lower part of the connecting rod 14 is connected with the upper part of the upper plunger 16, the upper part of the outlet pipe 10 is connected with the lower part of the load-reducing lower pump cylinder 8, the lower part of the outlet pipe 10 is connected with the upper part of the rod type sealing body 12, the upper pump cylinder 15 is sleeved outside the upper plunger 16, the upper pump cylinder 15 is matched and sealed with the upper plunger 16, the lower parts of the upper pump cylinder 15 and the connecting pipe 17 are connected with the upper part of the reducer 18 (the upper pump cylinder 15, the lower part of the upper pump cylinder 17 is connected with the reducer 18), the connecting pipe 17 and the reducer union 18 are connected in series, or the connecting pipe 17 is sleeved outside the upper pump barrel 15, the lower parts of the connecting pipe 17 and the upper pump barrel 15 are respectively connected with the upper part of the reducer union 18, in the structure, the upper pump barrel 15 does not bear axial force in the drawing, a discharge valve 20, a lower piston 21 and a communication joint 23 are sequentially connected below the upper plunger 16, an oil inlet valve 22 is arranged on the lower piston 21, the lower pump barrel 19 is sleeved outside the lower piston 21, the lower pump barrel 19 is sealed with the lower piston 21 in a matched manner, the upper part of the lower pump barrel 19 is connected with the lower part of the reducer union 18, the lower pump barrel 19 and the upper pump barrel 15 have different pump diameters, so that an oil inlet cavity 19-1 is formed, the communication joint 23 is provided with an oil inlet communication hole 23-1, the outlet pipe 10-1 is arranged on the outlet pipe 10, the upper part of the upper plunger 16 is provided with a communication hole 16-1, an inlet and a discharge hole is arranged between the upper plunger 16 and the lower piston 21, the well fluid can enter the oil inlet cavity 19-1 through the inlet and outlet holes, then is discharged into the upper plunger 16 through the inlet and outlet holes by the oil inlet cavity 19-1, the upper part of the isolation tube 7 is connected with the lower part of the breathing joint 3, the upper part of the sealing socket 11 is connected with the lower part of the isolation tube 7, the breathing joint 3 is provided with the outer breathing hole 3-1, the upper part of the outer tube 13 is connected with the outside of the breathing joint 3, the connecting point is positioned above the outer breathing hole 3-1, an upper breathing channel 13-1 is formed between the outer wall of the isolation tube 7 and the inner wall of the outer tube 13, the breathing joint 3, the isolation tube 7 and the outer tube 13 are arranged between a wellhead of an oil pumping tube column and an oil well pump, the load-reducing upper pump tube 1, the load-reducing upper piston 2, the upper sealing 4, the sealing shaft 5, the lower sealing 6, the load-reducing lower pump tube 8, the load-reducing lower piston 9, the outlet tube 10, the rod-type sealing body 12, the core body composed of the connecting rod 14, the upper pump cylinder 15, the upper plunger 16, the connecting pipe 17, the reducer union 18, the lower pump cylinder 19, the discharge valve 20, the lower piston 21, the oil inlet valve 22 and the communication joint 23 is arranged in the breathing joint 3, the isolation pipe 7 and the outer cylinder 13, the sealing shaft 5 is arranged in the breathing joint 3, the rod type sealing body 12 is arranged in the sealing socket 11, the outer wall of the rod type sealing body 12 is sealed with the inner wall of the sealing socket 11, an annular liquid outlet channel 7-1 is formed between the inner wall of the isolation pipe 7 and the outer wall of the load-shedding lower pump cylinder 8, the annular liquid outlet channel 7-1 is communicated with the inner through hole of the upper plunger 16 through the liquid outlet 10-1 and the communication hole 16-1, the upper part of the annular liquid outlet channel 7-1 is communicated with an oil pipe connected to the upper part of the breathing joint 3 through a side vertical channel of the breathing joint 3, a lower respiratory tract 13-2 is formed between the outer wall of the lower pump barrel 19 and the inner wall of the outer barrel 13, the upper respiratory tract 13-1 is communicated with the lower respiratory tract 13-2, the inner respiratory hole 5-1 is communicated with the outer respiratory hole 3-1, the upper seal 4 is positioned above the outer respiratory hole 3-1, the lower seal 6 is positioned below the outer respiratory hole 3-1, so that the lower part of the load-shedding upper pump barrel 1 and the upper part of the load-shedding lower pump barrel 8 are only communicated with the lower part of the lower respiratory tract 13-2, and the lower part of the lower respiratory tract 13-2 is positioned at the oil inlet communication hole 23-1.
The invention is arranged on an oil pumping pipe column (between a wellhead and an oil pump), the oil pump at the bottom of the oil pumping pipe column is a rod type oil pump (generally called a rod type pump in the field),
the upper part of the load-shedding upper piston 2 is connected with a sucker rod to a wellhead, and the lower part of the communication joint 23 is connected with the sucker rod to a pull rod of a rod type oil pump. The upper part of the breathing joint 3 is connected with a tubing string to a wellhead, and the lower part of the outer cylinder 13 is connected with the tubing string to the rod-type oil pump.
The mechanism consisting of the load-shedding upper pump cylinder 1, the load-shedding upper piston 2, the breathing joint 3, the upper seal 4, the seal shaft 5, the lower seal 6, the isolation pipe 7, the load-shedding lower pump cylinder 8 and the load-shedding lower piston 9 is a sucker rod load-shedding device, and the principle of the device is similar to that of a hydraulic jack, so that the load-shedding device can lighten the load of a sucker rod on an installation place and can be deeply drawn.
The mechanism consisting of the upper pump cylinder 15, the upper plunger 16, the connecting pipe 17, the reducer union 18, the lower pump cylinder 19, the discharge valve 20, the lower piston 21 and the oil inlet valve 22 is a relay pump, and well liquid pumped by the rod-type oil pump at the bottom is pumped to a wellhead in a relay way.
The invention is arranged on an oil pipe and a sucker rod between a wellhead and an oil pump, well fluid is pumped to the invention by the sucker rod, and then the invention is used for carrying out relay load relief pumping to the ground, thereby realizing relay load relief deep pumping and solving the problems existing in the deep pumping well.
The pressure in the oil pipe between the wellhead and the rod type oil pump is divided into two pressure systems by the relay pump, so that the pressure and the load of the liquid column borne by the oil pipe, the sucker rod and the oil pump below the relay pump are reduced, and the thrust of well liquid to the bottom of the sucker rod column is reduced during the downstroke, thereby reducing the stroke loss caused by the elastic expansion of the sucker rod and the oil pipe below the pump, reducing the gap leakage between the piston and the pump barrel of the oil pump, improving the displacement, the pump efficiency and the system efficiency, reducing the problems of disconnection and eccentric wear caused by the unsteady bending of the sucker rod below the pump, prolonging the service life of the oil pipe, the sucker rod and the oil pump below the pump and reducing the deep pumping cost.
The matching sealing of the piston and the pump cylinder is in accordance with the requirements specified in the GB/T18607 standard. The pump diameter refers to the inner diameter of the pump barrel of the oil pump.
When the pumping rod is lifted, the load-shedding upper pump cylinder 1, the load-shedding upper piston 2, the upper seal 4, the seal shaft 5, the lower seal 6, the load-shedding lower pump cylinder 8, the load-shedding lower piston 9, the outlet pipe 10, the rod type sealing body 12, the outer cylinder 13, the connecting rod 14, the upper pump cylinder 15, the upper plunger 16, the connecting pipe 17, the reducer union 18, the lower pump cylinder 19, the discharge valve 20, the lower piston 21, the oil inlet valve 22, the communication joint 23 and the rod type pumping pump core can be lifted for replacement, and the oil pipe column can be overhauled without lifting the oil pipe column, so that the work load is greatly reduced, and the well repairing time is shortened.

Claims (1)

1. The utility model provides a deep drawing device of rod-type relay relief, including last pump barrel (1) of relief, last piston (2) of relief, breathing joint (3), go up seal (4), sealed axle (5), lower seal (6), isolation tube (7), pump barrel (8) under the relief, piston (9) under the relief, outlet pipe (10), sealed socket (11), rod-type seal body (12), urceolus (13), connecting rod (14), go up pump barrel (15), go up plunger (16), connecting pipe (17), reducing joint (18), pump barrel (19) down, discharge valve (20), lower piston (21), oil feed valve (22), UNICOM connect (23), characterized by: the external diameter of the unloading upper piston (2) is smaller than that of the unloading lower piston (9), the unloading upper pump cylinder (1) is arranged on the sealing shaft (5), an inner breathing hole (5-1) is arranged on the sealing shaft (5), an upper seal (4) and a lower seal (6) are arranged on the sealing shaft (5), the upper seal (4) is arranged above the inner breathing hole (5-1), the lower seal (6) is arranged below the inner breathing hole (5-1), the lower part of the sealing shaft (5) is connected with the upper part of the unloading lower pump cylinder (8), the lower part of the unloading upper piston (2) is connected with the upper part of the unloading lower piston (9), the unloading upper pump cylinder (1) is sleeved outside the unloading upper piston (2), the unloading lower pump cylinder (8) is sealed with the unloading lower piston (9), the lower part of the connecting rod (14) is connected with the lower part of the connecting rod (10) of the connecting rod (9), the lower part of the connecting rod (14) is connected with the upper part of the connecting rod (10), the upper part of the connecting pipe (17) is connected with the lower part of the rod type sealing body (12), the upper pump cylinder (15) is sleeved outside the upper plunger (16), the upper pump cylinder (15) is matched and sealed with the upper plunger (16), the lower part of the upper pump cylinder (15) and the connecting pipe (17) are connected with the upper part of the reducer union (18), the discharge valve (20), the lower piston (21) and the communication union (23) are sequentially connected below the upper plunger (16), the oil inlet valve (22) is arranged on the lower piston (21), the lower pump cylinder (19) is sleeved outside the lower piston (21), the lower pump cylinder (19) is matched and sealed with the lower piston (21), the upper part of the lower pump cylinder (19) is connected with the lower part of the reducer union (18), the lower pump cylinder (19) is different from the pump diameter of the upper pump cylinder (15), an oil inlet cavity (19-1) is formed, the communication union (23) is provided with an oil inlet communication hole (23-1), the outlet pipe (10-1) is arranged on the upper part of the upper plunger (16), the upper part of the upper plunger (16) is provided with the communication hole (16-1), the upper plunger (16) and the oil inlet cavity (19) can enter the inner cavity (1) through the oil inlet hole (19) through the upper plunger (16), the upper part of the isolation pipe (7) is connected with the lower part of the breathing joint (3), the upper part of the sealing socket (11) is connected with the lower part of the isolation pipe (7), an outer breathing hole (3-1) is arranged on the breathing joint (3), the upper part of the outer cylinder (13) is connected with the outside of the breathing joint (3), the connecting point is positioned on the outer breathing hole (3-1), an upper respiratory tract (13-1) is formed between the outer wall of the isolation pipe (7) and the inner wall of the outer cylinder (13), the breathing joint (3), the isolation pipe (7) and the outer cylinder (13) are arranged between the wellhead of the pumping pipe column and the oil well pump, the upper pump cylinder (1), the upper piston (2), the upper seal (4), the sealing shaft (5), the lower seal (6), the lower pump cylinder (8), the lower piston (9), the outlet pipe (10), the rod type sealing body (12), the connecting rod (14), the upper pump cylinder (15), the upper plunger (16), the connecting pipe (17), the variable-diameter joint (18), the lower pump cylinder (19), the discharge valve (20), the lower piston (21), the oil inlet valve (22) and the isolation pipe (3) are arranged in the isolation pipe (3) in a communicating way, the sealing shaft (5) is positioned in the breathing joint (3), the rod type sealing body (12) is positioned in the sealing socket (11), the sealing is kept between the outer wall of the rod type sealing body (12) and the inner wall of the sealing socket (11), an annular liquid outlet channel (7-1) is formed between the inner wall of the isolation tube (7) and the outer wall of the unloading lower pump cylinder (8), the annular liquid outlet channel (7-1) is communicated with the inner through hole of the upper plunger (16) through the liquid outlet (10-1) and the communicating hole (16-1), the upper part of the annular liquid outlet channel (7-1) is communicated with an oil pipe connected to the upper part of the breathing joint (3) through a side vertical channel of the breathing joint (3), a lower respiratory tract (13-2) is formed between the outer wall of the lower pump cylinder (19) and the inner wall of the outer cylinder (13), the inner respiratory hole (5-1) is communicated with the outer respiratory hole (3-1), the upper part of the upper pump cylinder (4) is positioned on the upper part of the lower pump cylinder (3-1) and the lower pump cylinder (3) is positioned on the lower part of the lower pump cylinder (1), the lower part of the lower respiratory tract (13-2) is positioned at the oil inlet communicating hole (23-1).
CN202311234154.2A 2023-09-24 2023-09-24 Rod-type relay load-shedding deep drawing device Pending CN117052353A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311234154.2A CN117052353A (en) 2023-09-24 2023-09-24 Rod-type relay load-shedding deep drawing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311234154.2A CN117052353A (en) 2023-09-24 2023-09-24 Rod-type relay load-shedding deep drawing device

Publications (1)

Publication Number Publication Date
CN117052353A true CN117052353A (en) 2023-11-14

Family

ID=88657399

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311234154.2A Pending CN117052353A (en) 2023-09-24 2023-09-24 Rod-type relay load-shedding deep drawing device

Country Status (1)

Country Link
CN (1) CN117052353A (en)

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