CN213579927U

CN213579927U - Downhole safety valve testing device

Info

Publication number: CN213579927U
Application number: CN202022482392.3U
Authority: CN
Inventors: 孙德启; 张伟博; 郑灵芸; 余细波; 赵楠
Original assignee: Shanghai Extrong Oilfield Technology Co ltd
Current assignee: Shanghai Extrong Oilfield Technology Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-06-29
Anticipated expiration: 2030-11-02

Abstract

In the underground safety valve testing device, an upper plug and a lower plug can be respectively inserted into an upper sealing surface and a lower sealing surface of a safety valve to be tested in an outer cylinder body to be matched to form a sealing space; the upper plug and the lower plug respectively pressurize the upper sealing surface and the lower sealing surface to detect whether the upper sealing surface and the lower sealing surface leak or not. The safety valve can be detected whether to leak, and the upper plug can be rotated and the position of the upper plug can be changed; the models of the upper plug and the lower plug can be replaced, and the applicability is strong.

Description

Downhole safety valve testing device

Technical Field

The utility model belongs to the technical field of the downhole tool for oil gas field development and specifically relates to a relief valve testing arrangement in pit.

Background

The underground safety valve is an underground tool which can shut down a well in an emergency and ensure the safety of oil and gas production under the abnormal conditions of ground pipeline failure and the like, and is indispensable in production. The working principle is as follows: the hydraulic pressure is applied through the ground hydraulic control pipeline, the hydraulic pressure pushes the piston and the like to move downwards, the flowing pipe is driven to move downwards to compress the spring, the valve clack is jacked open, the safety valve is opened, when the safety valve needs to be closed, the hydraulic pressure is removed through the hydraulic control pipeline, the flowing pipe moves upwards under the action of the spring pushing force to be separated from the valve clack, the valve clack is closed under the action of the torsional spring, and the fluid channel is.

Therefore, before the safety valve is lowered into the well, experiments such as sealing performance and the like are particularly important. When the safety valve is tested, a testing device corresponding to the safety valve needs to be designed and connected to threads at two ends of the safety valve, so that the pressure bearing capacity and the sealing performance of the safety valve are verified. In this case, the applicability of the test device is limited, and a corresponding test device needs to be designed for each type of safety valve, which is relatively high in cost. In addition, if the safety valve needs to be subjected to multiple groups of tests, the safety valve is continuously buckled and unbuckled, the buckle type of the safety valve is easily damaged, and the whole safety valve is scrapped. Therefore, it is necessary to develop a testing device for an underground safety valve, which can meet the testing requirements of safety valves of different models and reduce the production cost to the maximum extent.

Disclosure of Invention

The utility model discloses a solve current problem, aim at providing a relief valve testing arrangement in pit.

1. In order to achieve the purpose, the utility model adopts the technical scheme that the safety valve comprises an outer cylinder body, wherein an upper end cap and a lower end cap are respectively arranged at the upper end and the lower end of an inner cavity of the outer cylinder body, and the upper end cap and the lower end cap can be respectively inserted into an upper sealing surface and a lower sealing surface of a safety valve to be tested and are arranged in the outer cylinder body and are matched to form a sealing space;

the upper plug and the lower plug are also respectively communicated with a liquid source, and the upper sealing surface and the lower sealing surface are pressurized from the liquid outlet to detect whether the upper sealing surface and the lower sealing surface leak or not.

The upper plug is a sliding piece capable of sliding along the axial direction of the outer barrel, a driving rod is further arranged at the upper end of the upper plug, and the driving rod drives the upper plug to slide along the axial direction.

The outer wall of the rod body of the threaded rod is connected with the inner wall of the middle hole of the upper end cap of the outer cylinder body through threads; by rotating the threaded rod, the upper plug can be driven to slide.

Wherein, the threaded rod is connected with the upper plug through the support plate.

The lower end of the outer barrel is provided with a lower end cap, and the lower end of the lower plug is fixedly connected with the upper end face of the lower end cap through threads.

The upper plug and the lower plug are respectively provided with a radial pressure transfer hole, one end of each pressure transfer hole is communicated with a liquid source, and the other end of each pressure transfer hole is communicated with the liquid outlets of the upper plug and the lower plug.

Wherein, the outer walls of the upper plug and the lower plug are respectively provided with an O-shaped ring which forms a seal with the safety valve to be tested.

The side wall of the outer cylinder body is provided with a wide open slot, so that the underground safety valve can be conveniently placed in the open slot, and the test result of the underground safety valve can be conveniently observed.

Wherein, the end part of the upper end cap or the lower end cap is also provided with a rotary lifting ring.

Compared with the prior art, the utility model can detect whether the leakage occurs or not by forming a sealed space and pressurizing by the upper plug, the lower plug and the safety valve; the distance between the upper plug and the lower plug is flexibly adjusted through the upper plug capable of sliding along the axial direction; the threaded rod can rotate the upper plug and change the position of the upper plug; the model of the upper plug and the model of the lower plug can be replaced, so that the device is applied to testing of the underground safety valves with different lengths and models, and the device is high in applicability.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention

Fig. 2 is a cross-sectional view of an embodiment of the invention;

in the figure: the device comprises a threaded rod 1, an upper end cap 2, a support plate 3, an outer barrel 4, a 5-HR type rotary lifting ring 7, a first screw, an upper plug 8, an upper pressure transmission hole 9, a lower plug 10, a lower pressure transmission hole 11, a lower end cap 12, an O-shaped ring 13, a second screw 15 and a wide-distance open slot 16.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings. Referring to fig. 1, fig. 1 shows an embodiment of the present invention, which provides a downhole safety valve testing device. For convenience of description, in this embodiment, the direction of the upper plug side is upward, and the direction of the lower plug side is downward.

The embodiment specifically comprises an outer barrel, wherein the upper end and the lower end of the inner cavity of the outer barrel are respectively provided with a slidable upper plug and a slidable lower plug. Wherein, last biography pressure hole that is equipped with radial setting on the end cap, the lower extreme is equipped with the liquid outlet to through first mounting screw on the mounting panel, the mounting panel passes through the second screwed connection at the lower extreme of threaded rod, but threaded rod passes through the screw thread of body of rod outer wall and the mesopore internal thread formation sliding connection of top end cap, and the top end cap passes through the threaded connection of its outer wall in the upper end of outer barrel. In addition, HR type rotating hanging ring is installed on the outer wall of the end part of the upper end cap, so that the upper end cap, the lower end cap and the outer cylinder are conveniently connected together through threads.

The lower end cap is provided with a lower pressure transmission hole which is radially arranged, the upper end of the lower end cap is provided with a liquid outlet, the lower end cap is connected to the inner thread of the lower end cap through an external thread, and the lower end cap is connected to the lower end of the outer barrel through an external thread of the outer wall of the lower end cap. Likewise, an HR type swivel hanger is mounted at the end of the lower end cap.

Referring to fig. 2, fig. 2 is a sectional view of the present embodiment. Before testing, the suitability of the upper sealing surface and the lower sealing surface of the underground safety valve to be tested and the upper plug and the lower plug of the testing device needs to be confirmed. Preferably, the O-shaped rings are arranged in the sealing grooves on the outer walls of the upper plug and the lower plug.

When the underground safety valve is used, the underground safety valve to be tested is placed into the outer barrel of the embodiment from the wide-distance open slot of the outer barrel, the lower end of the safety valve is installed on the lower plug, and the lower sealing surface of the safety valve is matched with the lower plug to form sealing. And rotating the threaded rod to enable the upper plug to be inserted into the upper sealing surface of the safety valve. At this time, the upper and lower ends of the safety valve form a seal. The safety valve is pressed through the upper pressure hole, the sealing of the safety valve is verified, whether the safety valve leaks or not can be visually seen through the wide-distance open slot of the outer cylinder body, and the sealing performance of the safety valve is tested.

The sealing performance of the safety valves of different models can be tested only by replacing the upper plug and the lower plug matched with the safety valves, the operability is high, and meanwhile, the production cost is reduced.

The embodiments of the present invention have been described in conjunction with the accompanying drawings and examples, the structures of which are not intended to limit the present invention, and those skilled in the art can make modifications as required, and all changes and modifications within the scope of the appended claims are within the scope of protection.

Claims

1. The utility model provides a relief valve testing arrangement in pit which characterized in that: the safety valve testing device comprises an outer barrel, wherein an upper end cap and a lower end cap are respectively arranged at the upper end and the lower end of an inner cavity of the outer barrel, and the upper end cap and the lower end cap can be respectively inserted into an upper sealing surface and a lower sealing surface of a safety valve to be tested and are matched to form a sealing space;

and the upper plug and the lower plug are respectively communicated with a liquid source, and the upper sealing surface and the lower sealing surface are pressurized to detect whether the upper sealing surface and the lower sealing surface leak or not.

2. The downhole safety valve testing device of claim 1, wherein: the upper plug is a sliding part which can slide along the axial direction of the outer cylinder body.

3. A downhole safety valve testing device according to claim 2, wherein: the slidable upper plug is also provided with a driving rod, and the driving rod drives the upper plug to slide along the axial direction.

4. A downhole safety valve testing device according to claim 3, wherein: the driving rod is a threaded rod, and the outer wall of the rod body of the threaded rod is connected with the inner wall of the middle hole of the upper end cap of the outer barrel body through threads; by rotating the threaded rod, the upper plug can be driven to slide.

5. The downhole safety valve testing device of claim 4, wherein: the threaded rod is connected with the upper plug through the support plate.

6. The downhole safety valve testing device of claim 1, wherein: the lower end of the outer barrel is provided with a lower end cap, and the lower end of the lower end cap is fixedly connected with the upper end face of the lower end cap.

7. The downhole safety valve testing device of any one of claims 1 to 6, wherein: the upper plug and the lower plug are respectively provided with a radial pressure transfer hole, one end of each pressure transfer hole is communicated with a liquid source, and the other end of each pressure transfer hole is communicated with the liquid outlets of the upper plug and the lower plug.

8. The downhole safety valve testing device of any one of claims 1 to 6, wherein: and O-shaped rings which are sealed with the safety valve to be tested are respectively arranged on the outer walls of the upper plug and the lower plug.

9. The downhole safety valve testing device of claim 7, wherein: and O-shaped rings which are sealed with the safety valve to be tested are respectively arranged on the outer walls of the upper plug and the lower plug.

10. A downhole safety valve testing device according to any of claims 1-6, 9, wherein: the side wall of the outer cylinder body is provided with a wide open slot for placing a safety valve to be tested.

11. The downhole safety valve testing device of claim 7, wherein: the side wall of the outer cylinder body is provided with a wide open slot for placing a safety valve to be tested.

12. The downhole safety valve testing device of claim 8, wherein: the side wall of the outer cylinder body is provided with a wide open slot for placing a safety valve to be tested.

13. A downhole safety valve testing device according to any of claims 4-6, wherein: the end part of the upper end cap or the lower end cap is also provided with a rotary lifting ring.