Hydraulic packer testing device

Abstract

The utility model provides a hydraulic packer testing device which comprises a pipe barrel with the bottom being of a sealing structure, a liquid injection hole formed in the pipe barrel and used for injecting heat conduction oil with the preset temperature and pressure into the pipe barrel, a sealing seat arranged at the top of the pipe barrel, a connecting pipe coaxial with the pipe barrel penetrating through the sealing seat, and a packer installed at the bottom of the pipe barrel, a liquid inlet pipe identical with the inner hole is arranged on the side wall of the connecting pipe and used for filling hydraulic oil into the packer, a hydraulic cylinder is arranged on the top of the sealing seat, and a hydraulic rod of the hydraulic cylinder is connected with the connecting pipe through a pressure sensor. According to the scheme, the authenticity of test results can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the field of packer testing devices, in particular to a hydraulic packer testing device. Background Art

[0002] The hydraulic packer is a downhole tool used to isolate the annular space of the oil pipe, oil and gas well casing or open hole wall. It mainly includes a seating mechanism formed by slips and a sealing structure formed by a rubber tube. The seating mechanism uses the hydraulic oil injected into the interior of the packer to open the slips to the outside of the circumference, and uses the slips to press against the well wall or pipe wall of the oil and gas well, thereby fixing the packer at a predetermined position in the oil and gas well.

[0003] In order to verify the seating effect of the packer and the pressure it can bear, the packer is usually subjected to a pressure test after production. The existing test device mainly includes a tubular and a driving device that simulates a wellbore. The tubular is installed in a fixed position. During the test, the packer is installed on the main shaft of the driving device and placed in the tubular. Then, pressure is applied to the inside of the packer to open the slips of the packer outward, thereby fixing the slips on the inner wall of the tubular to simulate the seating state of the packer. Then, the driving device is started, and the driving device applies pressure to the packer along the axis of the tubular. Then, it is observed whether the packer moves when the driving device reaches a predetermined power, so as to judge whether the seating of the packer is firm.

[0004] Although the structure of this test device is simple, it is difficult to simulate the slippery and high temperature environment of drilling fluid in the well, and the accuracy of the test results is poor. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a hydraulic packer testing device, which can effectively improve the authenticity of the test results.

[0006] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0007] A hydraulic packer testing device comprises: a tube with a sealing structure at the bottom, which is provided with a liquid injection hole for filling heat transfer oil with a predetermined temperature and pressure into the tube, a sealing seat is provided at the top of the tube, a connecting pipe coaxial with the tube is passed through the sealing seat, the bottom of which is used to install the packer, and the side wall of the connecting pipe is provided with a liquid inlet pipe identical to the inner hole for filling hydraulic oil into the packer, and a hydraulic cylinder is provided at the top of the sealing seat, and the hydraulic rod thereof is connected to the connecting pipe via a pressure sensor.

[0008] The beneficial effects of the utility model are: it can simulate the underground environment more realistically, improve the accuracy of the test results, and the overall structure of the device is simple and has good structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0010] Figure 1 A cross-sectional view showing the overall structure of the present application.

[0011] Figure 2 A cross-sectional view of the sealing seat, the tube and the connecting pipe is shown.

[0012] Markings in the figure: tube-1, injection hole-11, sealing seat-2, round tube-21, sealing sleeve-22, external thread ring-23, connecting pipe-3, liquid inlet pipe-31, hydraulic cylinder-4, hydraulic rod-41, threaded tube-42, ruler-43, pressure sensor-5. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0014] like Figure 1 , Figure 2 As shown, a hydraulic packer testing device comprises: a tube 1 with a sealing structure at the bottom, which is provided with a liquid injection hole 11 for filling heat transfer oil with a predetermined temperature and pressure into the tube 1, a sealing seat 2 is provided on the top of the tube 1, and a connecting pipe 3 coaxial with the tube 1 is passed through the sealing seat 2, and the bottom of the sealing seat is used to install the packer, and the side wall of the connecting pipe 3 is provided with a liquid inlet pipe 31 identical to the inner hole, which is used to fill hydraulic oil into the packer, and a hydraulic cylinder 4 is provided on the top of the sealing seat 2, and its hydraulic rod 41 is connected to the connecting pipe 3 through a pressure sensor 5.

[0015] During the test, heat transfer oil is added into the tube 1 through the injection hole 11, and the added heat transfer oil is set to the temperature and pressure required for the test. The specific temperature and pressure can be set according to the predicted use environment of the packer to simulate the real downhole environment and improve the accuracy of the test results; the packer is installed at the lower end of the connecting pipe 3 in advance, and hydraulic oil is added to the inside of the packer through the inlet pipe 31 to make the slips of the packer open outward until the pressure of the hydraulic oil reaches the seating pressure designed for the packer; then the hydraulic cylinder 4 is started, and the hydraulic rod 41 is used to apply an axial force to the packer, and the axial force can be either tension or pressure, so as to simultaneously meet the test of the bidirectional seating effect of the packer; when the axial force applied by the hydraulic cylinder 4 reaches the set value, if the oil pressure inside the connecting pipe 3 does not change, it proves that the packer has not moved, which means that the seating of the packer is stable, and the oil pressure inside the connecting pipe 3 can be monitored by setting an oil pressure sensor on the inlet pipe 31.

[0016] Preferably, Figure 2 As shown, the sealing seat 2 includes a round tube 21, inside which is provided a tubular sealing sleeve 22 for sealing the connecting tube 3 and the tube 1. The connecting tube 3 passes through the sealing sleeve 22. An external threaded ring 23 is provided at the end of the round tube 21 for pressing the sealing sleeve 22 into the mounting hole of the round tube 21 to prevent the sealing sleeve 22 from moving. The external threaded ring 23 is connected to the round tube 21 by threads.

[0017] Preferably, the round tube 21 is connected to the tubular body 1 by threads. Specifically, the round tube 21 is connected to the outer threads at the upper end of the tubular body 1 through the inner threads at the lower end, so as to facilitate disassembly and assembly, and also facilitate installation of the packer.

[0018] Preferably, Figure 1 As shown, the hydraulic cylinder 4 has a threaded tube 42 at one end facing the sealing seat 2, and the lower end of the threaded tube 42 is connected to the internal thread of the upper end of the round tube 21 through an external thread, so that the device forms an integral structure. Even if the tube 1 is not fixed, the test work can be carried out, and the overall structural strength of the device is improved.

[0019] Preferably, Figure 1 As shown, a scale 43 is coaxially provided at the end of the hydraulic cylinder 4, and the scale 43 is connected to the hydraulic rod 41, so that the movement of the hydraulic rod 41 can be directly observed through the scale 43, thereby more intuitively and conveniently judging whether the packer moves.

[0020] Preferably, the tube 1 is buried underground to reduce the installation space of the device and improve the safety during the test to prevent the tube 1 from rupturing and causing harm to the surrounding environment and test personnel.

[0021] The above is only a preferred embodiment of the utility model, and does not mean that it is the only one or limit the utility model. Those skilled in the art should understand that various changes or equivalent replacements made to the utility model without departing from the scope of the utility model are within the scope of protection of the utility model.

Claims

1. A hydraulic packer testing device, It is characterized in that include: A tube (1) having a sealing structure at the bottom is provided with a liquid injection hole (11) for injecting heat transfer oil having a predetermined temperature and pressure into the tube (1). A sealing seat (2) is provided at the top of the tube (1). A connecting pipe (3) coaxial with the tube (1) is passed through the sealing seat (2). The bottom of the tube (1) is used to install a packer. The side wall of the connecting pipe (3) is provided with a liquid inlet pipe (31) identical to the inner hole for injecting hydraulic oil into the packer. A hydraulic cylinder (4) is provided at the top of the sealing seat (2). The hydraulic rod (41) of the hydraulic cylinder is connected to the connecting pipe (3) via a pressure sensor (5).

2. A hydraulic packer testing device according to claim 1, It is characterized in that The sealing seat (2) comprises a round tube (21) having a tubular sealing sleeve (22) disposed therein, the connecting tube (3) passing through the sealing sleeve (22), and an external threaded ring (23) being disposed at the end of the round tube (21) for pressing the sealing sleeve (22) into the mounting hole of the round tube (21).

3. A hydraulic packer testing device according to claim 2, It is characterized in that The round tube (21) and the tube (1) are connected by threads.

4. A hydraulic packer testing device according to claim 2, It is characterized in that One end of the hydraulic cylinder (4) facing the sealing seat (2) is provided with a threaded tube (42), and the lower end of the threaded tube (42) is connected to the internal thread at the upper end of the round tube (21) via an external thread.

5. A hydraulic packer testing device according to claim 1, It is characterized in that A scale (43) is coaxially passed through the end of the hydraulic cylinder (4), and the scale (43) is connected to the hydraulic rod (41).

6. A hydraulic packer testing device according to claim 1, It is characterized in that The tube (1) is buried underground.

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