CN219012588U

CN219012588U - High-pressure multifunctional leakage finding and channeling checking working cylinder

Info

Publication number: CN219012588U
Application number: CN202223493976.6U
Authority: CN
Inventors: 刘宇航; 刘伟; 陈明; 潘玥同
Original assignee: Anshan Hongjing Petroleum Machinery Co ltd; Panjin Zhongshun Petroleum Machinery Co ltd
Current assignee: Anshan Hongjing Petroleum Machinery Co ltd; Panjin Zhongshun Petroleum Machinery Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-12
Anticipated expiration: 2032-12-27

Abstract

The utility model belongs to the technical field of oil field well workover operation leakage finding and channeling checking operation, and particularly relates to a high-pressure multifunctional leakage finding and channeling checking working cylinder. The working cylinder comprises an impact leakage packer, a pressure limiting switch and a bottom uniflow valve: the lower joint of the impact drainage packer is provided with a hole and a drainage cup is arranged, the lower end of the oil pipe is connected with the impact drainage packer, then is connected with a pressure limiting switch, and the lowest end of the oil pipe is connected with a bottom uniflow valve to form a sealed upper-lower type process pipe column. The utility model avoids the pollution of the residual liquid in the inner cavity of the oil pipe to the ground of the construction well site when each oil pipe is disassembled. Simple process and strong operability.

Description

High-pressure multifunctional leakage finding and channeling checking working cylinder

Technical Field

The utility model belongs to the technical field of oil field well workover operation leakage finding and channeling checking operation, and particularly relates to a high-pressure multifunctional leakage finding and channeling checking working cylinder.

Background

At present, the well repair business of old wells of oil and gas wells is gradually increased in all oil fields of the country, and the well repair business is one of important works of finding, checking leakage, plugging and plugging. Because the old well has a longer production period and the yield is gradually decreased year by year, in order to further improve the yield and the recovery ratio of the old well and the utilization ratio of the old well, the old well with the potential of digging needs to be subjected to necessary reconstruction operation, and the important precondition of the reconstruction of the old well is as follows: firstly, the condition of the old well shaft, whether the problems of blowby, deformation, fracture and the like exist or not are cleared, well shaft evaluation is carried out, and then the next well repair and reconstruction measures are arranged according to the current condition of the well shaft of the oil wells in a targeted manner, so that the basis is provided for the next well repair and reconstruction. For this reason, the well channeling finding and leak checking operation is an important task in which the condition of the well bore is judged.

The packers adopted by the prior mechanical leak finding and channeling checking process pipe column are basically divided into two main types, namely a Y341 compression packer series and a K344 and K341 expansion packer series. The common problems of the prior two kinds of mechanical type process pipe columns are that when the pipe column is lifted up from the well after the operation of finding and checking the leakage is finished, the pollution problem caused by the residual liquid in the inner cavity of the pipe column to the ground of a construction well site is solved when each single oil pipe is disassembled.

Disclosure of Invention

The utility model provides a high-pressure multifunctional leakage finding and channeling checking working cylinder, which mainly aims at a leakage finding and channeling checking process pipe column of a K344 expansion packer. The method solves the problem that when each oil pipe is disassembled in the process of lifting the pipe column from the well after the process of finding channeling and checking leakage of oil field oil and water wells is finished, the residual liquid in the inner cavity of the pipe column pollutes the ground of a construction well site.

The technical scheme of the utility model is as follows:

a high-pressure multifunctional leak finding and channeling checking working cylinder, which comprises an impact leakage packer, a pressure limiting switch and a bottom uniflow valve: the lower joint of the impact drainage packer is provided with a hole and a drainage cup is arranged, the lower end of the oil pipe is connected with the impact drainage packer, then is connected with a pressure limiting switch, and the lowest end of the oil pipe is connected with a bottom uniflow valve to form a sealed upper-lower type process pipe column.

Furthermore, the high-pressure multifunctional leak finding and channeling checking working cylinder can also be a sealed upper finding type process pipe column, and the structure is that the lower end of an oil pipe is connected with a pressure limiting switch first and then is connected with an impact leakage packer, and the lowest end of the oil pipe is connected with a bottom uniflow valve.

Furthermore, after the high-pressure multifunctional leakage finding and checking working cylinder is completed, before the working cylinder is lifted out of the well, an impact rod is thrown into an oil pipe from a ground wellhead, and the impact rod freely falls to move to generate impact force to collide with a drainage cup to form a drainage port, so that the inner cavity of the pipe column is communicated with the outer ring of the oil sleeve in an air manner to drain.

The utility model has the advantages and beneficial effects that:

when the whole well leak finding and channeling checking operation process is finished, before the leak finding and channeling checking process technology pipe column is put out from the well, an impact rod can be put in the pipe column from a ground wellhead, and the impact force generated by gravity acceleration during free falling motion of the impact rod is utilized to impact the drainage cup, so that a drainage channel is formed, and the inner cavity of the pipe column is communicated with the outer ring of the oil sleeve. And the pollution of the residual liquid in the inner cavity to the ground of the construction well site is avoided when each oil pipe is disassembled. Simple process and strong operability.

Drawings

FIG. 1 is a schematic diagram of a high-pressure multifunctional leak-finding and channeling-checking working cylinder seal upper-lower type tubular column structure;

FIG. 2 is a schematic diagram of a high-pressure multi-functional leak-finding and channeling-checking working cylinder seal-down upper tubular column structure;

FIG. 3 is a schematic diagram of a K344 impingement drainage packer structure according to the present utility model; FIG. a is a schematic diagram of a structure of a K344 impinging on a drainage packer before drainage; FIG. b is a schematic diagram of the structure of the K344 impinging on the drainage packer after the drainage cup is knocked off;

FIG. 4 is a schematic diagram of a pressure limiting switch and bottom check valve of the upper and lower tubular columns;

in the figure: 1-K344 strike a drainage packer; 2-a drainage cup; 3-voltage limiting switch; 4-bottom check valve; 5, striking a rod; 6-drainage port; 7-oil pipe.

Detailed Description

The utility model will be described in further detail with reference to figures 1-4 and the detailed description.

A high-pressure multifunctional leakage finding and channeling checking working cylinder, which comprises a k344 impact leakage packer 1, a pressure limiting switch 3 and a bottom check valve 4, wherein the k344 impacts an opening at the lower joint of the leakage packer 1 and is provided with a leakage cup 2;

the working cylinder is divided into 2 forms, and the following formula is found in the sealing way as shown in fig. 1: the lower end of the oil pipe 7 is connected with the k344 impact leakage packer 1, then connected with the pressure limiting switch 3, and the lowest end is connected with the bottom check valve 4; the following equation is shown in fig. 2: the lower end of the oil pipe 7 is connected with the pressure limiting switch 3, then is connected with the k344 impact leakage packer 1, and the lowest end is connected with the bottom check valve 4.

When the leak finding and channeling checking are completed, before the working cylinder is lifted from the well, as shown in fig. 3, an impact rod is thrown into the oil pipe from the wellhead on the ground, and the free falling body of the impact rod moves to generate impact force to knock off the drainage cup, so that a drainage port is formed, and the inner cavity of the pipe column is in hollow communication with the outer ring of the oil sleeve to drain.

The working principle of the high-pressure multifunctional leakage finding and channeling checking working cylinder is as follows:

finding leakage and checking channeling principles:

the percussion release packer 1 with K344 is combined with a pressure limiting switch 3 and a bottom check valve 4. And (3) pressurizing the inner cavity of the oil pipe 7, and when the pressure of the inner cavity of the pipe column is 0.5-1 MPa higher than the pressure of the outer ring space, starting the pressure limiting switch 3, and impacting the rubber drum bulge seat seal of the drainage packer 1 by K344 to seal the oil sleeve space into an upper part and a lower part. One side of the pressure limiting switch 3 is a pressure annular space, and the other side is a non-pressure annular space.

According to the connection of the pressure limiting switch at different positions of the K344 impact leakage packer 1, the working cylinder is divided into 2 types, namely a sealing up and down process pipe column shown in FIG. 1 and a sealing down and up process pipe column shown in FIG. 2; the principle of the two is the same. The ground pump truck further improves the pressure of the oil pipe inner cavity and the pressure ring to 15Mpa and then stabilizes the pressure for 30 minutes, the pressure ring pressure does not drop, and the pressure limit switch 3 side at the pressure limit position can be judged, so that no leakage point exists at the oil sleeve annular well section. If the pressure drops and the pressure cannot be stabilized, the leakage point at the annular well section of the oil sleeve can be judged on one side of the pressure limiting switch 3. And then stopping the pump by the pump truck for pressure relief, and retracting and deblocking the rubber sleeve of the leakage packer 1 by K344 impact. This is a leak finding and channeling checking period. Lifting the tubular column or lowering the tubular column, moving K344 to strike the setting position of the drainage packer 1, and carrying out the next leak finding and channeling checking period. Because of the well Duan Jiaochang, the leak string position of the casing can be accurately judged through a plurality of leak finding and channeling checking periods.

Drainage, anti-fouling principle:

when the whole well leakage finding and channeling checking working procedures are finished, before the leakage finding and channeling checking working cylinder is lifted out from the well, the impact rod 5 can be put into the pipe column from the well head on the ground, the impact force generated by the free falling gravity acceleration of the impact rod 5 is utilized to impact the leakage cup 2, the leakage port 6 is generated, a leakage channel is formed, and the inner cavity of the pipe column is communicated with the outer ring of the oil sleeve. Thus, the liquid in the inner cavity of the oil pipe 7 flows into the well in the lifting process of the pipe column, and the pollution of the residual liquid in the inner cavity to the ground of a construction well site is avoided when each oil pipe is disassembled.

Claims

1. The utility model provides a multi-functional leak hunting of high pressure is tested and is scurry a working cylinder, its characterized in that, the working cylinder contains striking bleeder packer, pressure limiting switch and bottom uniflow valve: the lower joint of the impact drainage packer is provided with a hole and is provided with a drainage cup, the lower end of the oil pipe is connected with the impact drainage packer, the impact drainage packer is connected with a pressure limiting switch, the pressure limiting switch is connected with a bottom uniflow valve, and the working cylinder is a sealed upper-finding lower type process pipe column.

2. The high-pressure multifunctional leak finding and channeling checking working cylinder according to claim 1, wherein the working cylinder can also be a sealed upper finding type process pipe column, and is structurally characterized in that the lower end of an oil pipe is connected with a pressure limiting switch, the pressure limiting switch is connected with an impact leakage packer, and the impact leakage packer is connected with a bottom single flow valve.