Hydraulic slip test tool

Abstract

The utility model discloses a hydraulic slip test tool, which is characterized in that hydraulic oil is injected through a filling joint in a pressing manner, a thrust mechanism is driven to push a test slip and a shearing mechanism, and whether the test slip is anchored on the inner wall of a tool sleeve or not can be judged according to whether a shearing pin is cut off or not. After the test slip is anchored on the inner wall of the tool sleeve, hydraulic oil is continuously injected to push the test slip, and whether the test slip meets the anchoring requirement or not can be judged. And slip anchoring performance tests under different force values can be carried out according to design requirements. The test tool is small in size, few in parts, simple in structure, safe, reliable and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of slip performance testing, in particular to a hydraulic slip testing tool. Background Art

[0002] In the process of oilfield development, packers, retainers and bridge plugs are widely used as completion tools in oil and gas well operations in major oilfields. Slips, as parts of stabilizing tools, have their own anchoring performance, which determines whether the above-mentioned packers, retainers and bridge plugs can be successfully set, pressurized and released, which directly affects the process and effect of completion operations.

[0003] Therefore, how to design a hydraulic slip pressure test tool to ensure that the anchoring performance of the slip can meet the stability requirements of the above-mentioned working tools is a problem currently faced. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the above-mentioned background technology and to provide a hydraulic slip test tool with simple structure, small size, quick installation and disassembly, ability to perform liquid pressure testing according to required force values, low cost and high test accuracy.

[0005] To achieve this purpose, the hydraulic slip test fixture designed by the utility model includes a fixture sleeve, the interior of the fixture sleeve is provided with a filling joint for injecting hydraulic oil, a thrust mechanism connected with the filling joint and moving axially along the fixture sleeve with the hydraulic oil as the power, and a shear mechanism coaxially fixed to the interior of the fixture sleeve by a shear pin; a test slip that can be coaxially arranged on the shear mechanism and docked with the power output end of the thrust mechanism, and the shear mechanism is provided with a slip positioning surface that cooperates with a side surface of the test slip away from the thrust mechanism to enable the test slip to be installed and positioned on the shear mechanism.

[0006] Furthermore, the injection joint is coaxially fixed inside one end of the tooling sleeve, a injection channel is opened in the injection joint along its axial direction, and the thrust mechanism is connected to the injection channel.

[0007] Furthermore, the injection joint is threadedly connected to the tooling sleeve.

[0008] Furthermore, the thrust mechanism includes a thrust guide sleeve coaxially slidably connected to the surface of the perfusion joint, and the axial ends of the thrust guide sleeve cooperate with the surface of the perfusion joint to form a closed structure. The gap between the perfusion joint and the thrust guide sleeve located between the two closed structures is a hydraulic thrust chamber connected to the perfusion channel.

[0009] Furthermore, sealing rings are provided between the inner surfaces at both axial ends of the thrust guide sleeve and the outer surface of the injection joint, and the inner surface of the thrust guide sleeve, the sealing ring and the outer surface of the injection joint form the closed structure.

[0010] Furthermore, the thrust mechanism also includes a conical sleeve coaxially fixed to the end of the thrust guide sleeve away from the injection joint, and the end of the conical sleeve away from the thrust guide sleeve is a conical structure that can cooperate with the inner surface profile of the test cava to push the test cava outward so that the test cava is anchored on the inner surface of the tooling sleeve.

[0011] Furthermore, the thrust guide sleeve includes a thrust sleeve, and the outer surfaces of the two axial ends of the thrust sleeve are coaxially fixed with a guide sleeve and the cone sleeve respectively, the inner surface of the guide sleeve is coaxially slidably connected to the outer surface of the perfusion joint, and a sealing ring is provided between the inner surface of the thrust sleeve and the outer surface of the perfusion joint and between the inner surface of the guide sleeve and the outer surface of the perfusion joint.

[0012] Furthermore, the shear mechanism includes a stepped shaft, the small diameter end of the stepped shaft is coaxially inserted into the conical sleeve, the inner surface of the conical sleeve is slidably connected to the outer surface of the small diameter end of the stepped shaft, the step surface of the stepped shaft is the cava positioning surface, and the shear pin is connected between the large diameter end of the stepped shaft and the tooling sleeve.

[0013] Furthermore, a shear ring is coaxially fixed to the surface of one end of the large diameter of the stepped shaft, the shear ring and the tooling sleeve are connected with the shear pins, and the shear pins are arranged along the radial direction of the tooling sleeve.

[0014] Furthermore, a through hole is opened inside the stepped shaft along its axial direction.

[0015] The beneficial effects of the utility model are as follows: the hydraulic slip test fixture designed by the utility model injects hydraulic oil through the injection joint to drive the thrust mechanism to push the test slip and the shear mechanism. According to whether the shear pin is cut off, it can be judged whether the test slip is anchored on the inner wall of the fixture sleeve. After the test slip is anchored on the inner wall of the fixture sleeve, the hydraulic oil is continuously injected to push the test slip to judge whether the test slip meets the anchoring requirements. The slip anchoring performance test under different force values ​​can be carried out according to the design requirements. The test fixture is small in size, has few parts, simple in structure, safe and reliable, and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 An axial cross-sectional view of the hydraulic slip test fixture designed for the utility model;

[0017] Among them, 1—tooling sleeve, 2—injection joint (2.1—plug, 2.2—connector), 3—thrust mechanism (3.1—thrust sleeve, 3.2—guide sleeve), 4—shear pin, 5—shear mechanism (5.1—step shaft, 5.2—shear ring), 6—test slip, 7—injection channel, 8—hydraulic thrust chamber, 9—sealing ring, 10—conical sleeve. DETAILED DESCRIPTION

[0018] like Figure 1 The figure shows a hydraulic slip test fixture, comprising a fixture sleeve 1, inside of which is arranged a filling joint 2 for injecting hydraulic oil, a thrust mechanism 3 which is connected with the filling joint 2 and moves axially along the fixture sleeve 1 with the hydraulic oil as the power, and a shear mechanism 5 which is coaxially fixed to the inside of the fixture sleeve 1 through a shear pin 4; a test slip 6 which is connected to the power output end of the thrust mechanism 3 can be coaxially arranged on the shear mechanism 5, and a slip positioning surface which cooperates with a side surface of the test slip 6 away from the thrust mechanism 3 so that the test slip 6 is installed and positioned on the shear mechanism 5.

[0019] Specifically, the pouring joint 2 comprises a connector 2.2 threadedly connected to the inside of the tooling sleeve 1 and a plug 2.1 threadedly connected to the inside of the connector 2.2. A pouring channel 7 is provided in the pouring joint 2 along its axial direction.

[0020] The thrust mechanism 3 includes a thrust sleeve 3.1 and a guide sleeve 3.2 threadedly connected to one end of the thrust sleeve 3.1. The thrust sleeve 3.1 and the guide sleeve 3.2 form a thrust guide sleeve structure. The guide sleeve 3.1 can move axially on the surface of the connector 2.2. A sealing ring 9 is provided between the guide sleeve 3.1 and the connector 2.2. A sealing ring 9 is also provided between the thrust sleeve 3.1 and the connector 2. A hydraulic thrust chamber 8 is formed in the gap between the two sealing rings and between the thrust mechanism 3 and the injection joint 2. The hydraulic thrust chamber 8 is connected to the injection channel 7. The other end of the thrust sleeve 3.1 is coaxially threadedly connected to a cone sleeve 10. The end of the cone sleeve 10 away from the thrust sleeve 3.1 is a cone-shaped structure that can be matched with the inner surface of the test slip 6 and push the test slip 6 outward to anchor the test slip 6 on the inner surface of the tooling sleeve 1.

[0021] The shearing mechanism 5 comprises a stepped shaft 5.1, one end of the stepped shaft 5.1 with a small diameter is coaxially inserted into the conical sleeve 10, the inner surface of the conical sleeve 10 is slidably connected to the outer surface of the one end of the stepped shaft 5.1 with a small diameter, the stepped surface of the stepped shaft 5.1 is a slip positioning surface, a shearing ring 5.2 is coaxially fixed to the surface of the one end of the stepped shaft 5.1 with a large diameter, a shearing pin 4 is connected between the shearing ring 5.2 and the tooling sleeve 1, the shearing pin 4 is arranged along the radial direction of the tooling sleeve 1, and a through hole is opened inside the stepped shaft 5.1 along its axial direction.

[0022] The test method of the hydraulic slip test fixture designed by the utility model is: connect the plug 2.1 with the connector 2.2, then insert the two sealing rings 9 into the two sealing ring installation grooves of the connector 2.2 respectively, connect the guide sleeve 3.2 with the thrust sleeve 3.1, and then insert the thrust sleeve 3.1 onto the connector 2.2, connect the cone sleeve 10 with the thrust sleeve 3.1, connect the tool sleeve 8 with the connector 2.2, connect the stepped shaft 5.1 with the shear ring 5.2 to form the shear mechanism 5, then put the test slip 5 on the stepped shaft 5.1, connect the shear mechanism 5 into the tool sleeve 1, connect the conical surface of the cone sleeve 10 with the conical surface of the test slip 6, align the shear groove of the shear ring 5.2 with the shear pin hole of the tool sleeve 1, and then place the shear pin 4 to fix the internal components.

[0023] Liquid is injected into the plug 2.1 for hydraulic pressure, and the liquid enters the hydraulic thrust chamber 8 through the injection channel 7. After the thrust mechanism 3 is subjected to force, it moves to push the cone sleeve 10 to move and squeeze the test slip 6. After the test slip 6 pushes the stepped shaft 5.1 and the shear ring 5.2 to cut off the shear pin 4, the test slip 6 is anchored on the inner wall of the tooling sleeve 8. Since the annular cavity area of ​​the thrust sleeve 3.1 is a fixed value, the pressure value of the injection can be set according to actual needs, thereby obtaining different anchoring forces. If the injection pressure of the hydraulic oil reaches a pressure value that matches the set slip anchoring force, the anchoring ability of the test slip 6 is qualified; if the injection pressure of the hydraulic oil cannot reach a pressure value that matches the set slip anchoring force, the anchoring ability of the test slip 6 is unqualified.

[0024] In summary, the hydraulic slip test fixture designed by the utility model injects hydraulic oil through the injection joint 2, drives the thrust mechanism 3 to push the test slip 6 and the shear mechanism 5, and judges whether the test slip 6 is anchored on the inner wall of the fixture sleeve 1 according to whether the shear pin 4 is cut off. After the test slip 6 is anchored on the inner wall of the fixture sleeve 1, continue to inject hydraulic oil to push the test slip 6, and judge whether the test slip 6 meets the anchoring requirements. The slip anchoring performance test under different force values ​​can be carried out according to the design requirements. The test fixture is small in size, has few parts, simple in structure, safe and reliable, and easy to operate.

[0025] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A hydraulic slip test tool, characterized in that: It comprises a tooling sleeve (1), wherein the tooling sleeve (1) is provided with a filling joint (2) for injecting hydraulic oil, a thrust mechanism (3) which is connected with the filling joint (2) and moves axially along the tooling sleeve (1) with the hydraulic oil as the power, and a shear mechanism (5) which is coaxially fixed to the tooling sleeve (1) through a shear pin (4); a test slip (6) which is coaxially arranged on the shear mechanism (5) and is connected to the power output end of the thrust mechanism (3); and a slip positioning surface which cooperates with a side surface of the test slip (6) away from the thrust mechanism (3) so that the test slip (6) is installed and positioned on the shear mechanism (5).

2. The hydraulic slips testing tool as claimed in claim 1, characterized in that: The injection joint (2) is coaxially fixed inside one end of the tooling sleeve (1), a injection channel (7) is provided in the injection joint (2) along its axial direction, and the thrust mechanism (3) is connected to the injection channel (7).

3. The hydraulic slips testing tool as claimed in claim 2, characterized in that: The injection joint (2) is threadedly connected to the tooling sleeve (1).

4. The hydraulic slips testing tool as claimed in claim 2, characterized in that: The thrust mechanism (3) comprises a thrust guide sleeve coaxially slidably connected to the surface of the injection joint (2), the axial ends of the thrust guide sleeve cooperate with the surface of the injection joint (2) to form a closed structure, and the gap between the injection joint (2) and the thrust guide sleeve located between the two closed structures is a hydraulic thrust chamber (8) connected to the injection channel (7).

5. The hydraulic slips testing tool as claimed in claim 4, characterized in that: Sealing rings (9) are provided between the inner surfaces of the two axial ends of the thrust guide sleeve and the outer surface of the injection joint (2); the inner surface of the thrust guide sleeve, the sealing ring (9) and the outer surface of the injection joint (2) form the closed structure.

6. The hydraulic slips testing tool as claimed in claim 5, characterized in that: The thrust mechanism (3) further comprises a conical sleeve (10) coaxially fixed to one end of the thrust guide sleeve away from the injection joint (2); the end of the conical sleeve (10) away from the thrust guide sleeve is a frusto-conical structure which can cooperate with the inner surface of the test slip (6) to push the test slip (6) outwards so that the test slip (6) is anchored on the inner surface of the tooling sleeve (1).

7. The hydraulic slips testing tool as claimed in claim 6, characterized in that: The thrust guide sleeve comprises a thrust sleeve (3.1), the outer surfaces of the two axial ends of the thrust sleeve (3.1) are coaxially fixed with a guide sleeve (3.2) and the cone sleeve (10), the inner surface of the guide sleeve (3.2) is coaxially slidably connected to the outer surface of the injection joint (2), and a sealing ring (9) is provided between the inner surface of the thrust sleeve (3.1) and the outer surface of the injection joint (2) and between the inner surface of the guide sleeve (3.2) and the outer surface of the injection joint (2).

8. The hydraulic slips testing tool as claimed in claim 6, characterized in that: The shear mechanism (5) comprises a stepped shaft (5.1), the small diameter end of the stepped shaft (5.1) is coaxially inserted into the cone sleeve (10), the inner surface of the cone sleeve (10) is slidably connected to the outer surface of the small diameter end of the stepped shaft (5.1), the stepped surface of the stepped shaft (5.1) is the slip positioning surface, and the shear pin (4) is connected between the large diameter end of the stepped shaft (5.1) and the tooling sleeve (1).

9. The hydraulic slips testing tool as claimed in claim 8, characterized in that: A shear ring (5.2) is coaxially fixed to the large-diameter end surface of the stepped shaft (5.1), the shear ring (5.2) and the tooling sleeve (1) are connected with the shear pin (4), and the shear pin (4) is arranged along the radial direction of the tooling sleeve (1).

10. The hydraulic slips testing tool as claimed in claim 8 or 9, characterized in that: A through hole is provided inside the stepped shaft (5.1) along its axial direction.

Images