Pressure difference bearing test device for packer

Abstract

The utility model discloses a packer pressure difference bearing test device which comprises an experiment cylinder used for placing a packer experiment, a positioning assembly arranged in the experiment cylinder and used for assisting in preliminary positioning of a packer, and a clamping assembly used for clamping after positioning. The upper end and the lower end of the experiment cylinder are provided with sealing compression assemblies used for sealing compression in the experiment process. The sealing compression assembly comprises installation grooves formed in the upper end and the lower end of the experiment cylinder, blanking caps are detachably installed on the installation grooves in a threaded mode, air pipes used for supplying pressure and extracting pressure are arranged on the blanking caps, and the air pipes are communicated with the interior of the experiment cylinder. When the packer pressure difference bearing test device works, a pressure difference experiment on the packer is completed by sealing the pressed assembly, and in the experiment process, clamping and releasing of the packer can be synchronously achieved by mounting and dismounting the blanking cap, so that quick mounting and dismounting operation of the packer in the experiment process is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to packer pressure difference bearing test technical field, concretely relates to packer pressure difference bearing test device. BACKGROUND

[0002] The packer pressure difference bearing test device aims to simulate the actual working environment of the packer in the well, accurately test its ability to bear positive and negative pressure difference, and ensure the reliability and stability of the packer in the application scenarios such as oil and gas exploitation. During the operation of the packer pressure difference bearing test device, based on Pascal's law, controllable pressure difference is applied to both ends of the packer through the hydraulic or pneumatic system to simulate the complex pressure conditions in the well. Sensors are used to monitor key parameters such as pressure, temperature and displacement in real time, and feedback to the control system to realize closed-loop control and data recording to evaluate the sealing performance and structural integrity of the packer under the action of pressure difference.

[0003] However, in order to avoid the movement of the packer inside the experimental cylinder during the experiment, the packer after placement needs to be locked and fixed by bolts, which is a relatively cumbersome operation and affects the rapid installation and disassembly operation of the packer during the experiment.

[0004] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the basic idea of the technical solution of the utility model is:

[0006] The packer pressure difference bearing test device comprises an experimental cylinder for placing the packer for experiment, a positioning assembly for assisting the preliminary positioning of the packer inside the experimental cylinder, and a clamping assembly for clamping after positioning. The upper and lower ends of the experimental cylinder are provided with a sealing and pressure receiving assembly for sealing and pressure receiving during the experiment.

[0007] The sealing and pressure receiving assembly comprises a mounting groove opened at the upper and lower ends of the experimental cylinder, and a plug is detachably installed on the mounting groove by screwing. The plug is provided with an air pipe for pressure supply and pressure extraction, and the air pipe is in communication with the inside of the experimental cylinder.

[0008] The clamping assembly is symmetrically provided with two groups at the upper and lower ends of the experimental cylinder. The clamping assembly comprises a plurality of clamping plates arranged in a ring array inside the experimental cylinder. An arc-shaped groove is formed on each clamping plate for abutting against the outer side of the packer. The inside of the experimental cylinder is provided with a transmission assembly for transmitting the clamping plates and a telescopic guide assembly for telescopic guiding during transmission.

[0009] The transmission assembly comprises two groups of mounting racks fixed to the back of the clamping plate, a transmission plate is arranged between the two groups of mounting racks, an inclined groove is formed in the transmission plate, a transmission rod is slidably connected to the inclined groove, the transmission rod is fixed between the two groups of mounting racks, and a pushing assembly for pushing the transmission plate is arranged in the experimental cylinder.

[0010] The pushing assembly comprises a push rod slidably connected to the inside of the experimental cylinder, one end of the push rod is located in the mounting groove, and the other end of the push rod is fixed with a connecting plate, and the connecting plate is fixed to the upper end of the transmission plate.

[0011] The telescopic guide assembly comprises a sleeve fixed to the inside of the experimental cylinder, a sliding rod is slidably connected to each group of sleeves, one end of the sliding rod is fixed to one side of the clamping plate, and a spring is arranged outside each group of sleeves, and the two ends of the spring are connected to the inner wall of the clamping plate and the experimental cylinder respectively.

[0012] The positioning assembly comprises an annular groove formed in the inside of the experimental cylinder, and an annular sealing gasket is arranged in the annular groove for abutting and positioning the outer side of the packer.

[0013] Compared with the prior art, the packer pressure difference test device has the following beneficial effects:

[0014] During operation, the sealing pressure receiving assembly is used to complete the pressure difference experiment of the packer, and during the experiment, the installation and disassembly of the plug cover can simultaneously realize the clamping and loosening of the packer, so that the packer can be quickly installed and disassembled during the experiment.

[0015] The specific embodiments of the utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In the drawings:

[0017] Fig. 1 It is a schematic view of the overall shape structure of the utility model;

[0018] Fig. 2 It is a schematic view of the positioning assembly and the sealing pressure receiving assembly structure of the utility model;

[0019] Fig. 3 It is a schematic view of the clamping assembly and the telescopic guide assembly structure of the utility model;

[0020] Fig. 4 It is a schematic view of the transmission assembly structure of the utility model.

[0021] In the diagram: 1-Experimental cylinder; 201-Annular groove; 202-Annular sealing gasket; 301-Mounting groove; 302-Plug; 303-Gas tube; 401-Clamping plate; 402-Arc groove; 501-Sleeve; 502-Slide rod; 503-Spring; 601-Mounting bracket; 602-Transmission plate; 603-Inclined groove; 604-Transmission rod; 701-Connecting plate; 702-Push rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0023] like Figs. 1 to 4 As shown, the packer pressure differential test device includes an experimental cylinder 1 for placing the packer in the test, a positioning component for assisting in the initial positioning of the packer and a clamping component for clamping after positioning, and sealing pressure components for sealing and pressure during the test are provided at the upper and lower ends of the experimental cylinder 1.

[0024] When the packer differential pressure testing device is in operation, it completes the differential pressure test on the packer through the sealed pressure-bearing components. During the test, the clamping and loosening of the packer can be achieved simultaneously through the installation and removal of the plug 302, which facilitates the rapid installation and disassembly of the packer during the test.

[0025] The sealing pressure assembly includes mounting grooves 301 at the upper and lower ends of the experimental cylinder 1. A plug 302 is detachably installed on the mounting groove 301 by means of threads. The plug 302 is provided with an air pipe 303 for supplying and depressurizing. The air pipe 303 is connected to the interior of the experimental cylinder 1. After the packer is placed and the upper and lower ends of the experimental cylinder 1 are sealed, the air pipes 303 on the two sets of plugs 302 are respectively connected to external pressure equipment. Through the driving action of the pressure equipment, the upper and lower ends of the packer are respectively supplied with pressure and subjected to negative pressure, simulating the effect of different pressure differences on the packer and completing the pressure difference experiment of the packer.

[0026] It should be noted that the pressure supply of the pressure equipment and the detection and identification of the pressure inside the packer during the differential pressure test of the packer are conventional technical means and are considered prior art in this application, so they will not be described in detail here.

[0027] The clamping assembly is symmetrically provided with two groups at the upper and lower ends of the experimental cylinder 1, and the clamping assembly comprises a plurality of clamping plates 401 arranged in the experimental cylinder 1, and each group of clamping plates 401 is arranged in a ring array state, and an arc-shaped groove 402 for abutting against the outer side of the packer is formed on each group of clamping plates 401, and the inside of the experimental cylinder 1 is provided with a transmission assembly for driving the clamping plates 401 and a telescopic guide assembly for telescopic guiding during transmission; with the screwing of the blocking cover 302 on the mounting groove 301, the mounting frame 601 and the clamping plate 401 are driven to move towards the outer side of the packer by transmission, and in the process of movement, the arc-shaped groove 402 on the clamping plate 401 abuts against the outer side of the packer, and the placed packer is clamped by the abutting action of the arc-shaped grooves 402 on each group of clamping plates 401 and the four sides of the packer.

[0028] The transmission assembly comprises two groups of mounting frames 601 fixed to the back of the clamping plate 401, and a transmission plate 602 is arranged between the two groups of mounting frames 601, and an inclined groove 603 is formed on the transmission plate 602, and a transmission rod 604 is slidably connected to the inclined groove 603, and the transmission rod 604 is fixed between the two groups of mounting frames 601, and the inside of the experimental cylinder 1 is provided with a pushing assembly for pushing the transmission plate 602; the pushing assembly comprises a push rod 702 slidably connected to the inside of the experimental cylinder 1, one end of the push rod 702 is located in the inside of the mounting groove 301, the other end of the push rod 702 is fixed with a connecting plate 701, and the connecting plate 701 is fixed to the upper end of the transmission plate 602; in the process of the experiment, with the screwing of the blocking cover 302 on the mounting groove 301, the end of the blocking cover 302 abuts against the push rod 702, and through the extrusion action, the connecting plate 701 and the transmission plate 602 move in the inside of the experimental cylinder 1, and in the process of movement of the transmission plate 602, the mounting frame 601 and the clamping plate 401 are driven to move towards the outer side of the packer through the interaction of the inclined groove 603 and the transmission rod 604, and in the process of movement, the arc-shaped groove 402 on the clamping plate 401 abuts against the outer side of the packer.

[0029] The telescopic guide assembly comprises a sleeve 501 fixed to the inside of the experimental cylinder 1, a slide rod 502 is slidably connected to each group of sleeves 501, one end of the slide rod 502 is fixed to one side of the clamping plate 401, and a spring 503 is sleeved outside each group of sleeves 501, and the two ends of the spring 503 are respectively connected to the clamping plate 401 and the inner wall of the experimental cylinder 1; through the sleeve 501 and the slide rod 502, the telescopic guide of the clamping plate 401 after being stressed is facilitated, and through the spring 503, the clamping plate 401 after being moved is facilitated to be reset.

[0030] The positioning assembly comprises an annular groove 201 formed in the interior of the experimental cylinder 1, and an annular sealing gasket 202 is installed in the interior of the annular groove 201 and used for abutting against the outer side of the packer for positioning; the packer is placed in the interior of the experimental cylinder 1, and in the process of placement, the annular sealing gasket 202 in the interior of the annular groove 201 abuts against the outer side of the packer, and the packer is positioned through the abutting and extruding action.

[0031] In the process of operation of the packer pressure difference test device, the packer is placed in the interior of the experimental cylinder 1 and positioned through the positioning assembly, after the packer is placed and positioned, the two sets of sealing pressure receiving assemblies are connected to the installation grooves 301 at the upper and lower ends of the experimental cylinder 1 through the threaded mode, and the upper and lower ends of the experimental cylinder 1 are blocked through the two sets of plugs 302;

[0032] After the packer is placed and the upper and lower ends of the experimental cylinder 1 are blocked, the air pipes 303 on the two sets of plugs 302 are respectively connected to the external pressure equipment, the pressure equipment is driven to realize the separate pressure supply and negative pressure operation on the upper and lower ends of the packer, the influence of different pressure differences on the packer is simulated, and the pressure difference experiment on the packer is completed;

[0033] In the process of experiment, with the screwing of the plugs 302 in the installation grooves 301, the end of the plug 302 abuts against the push rod 702, the connecting plate 701 and the transmission plate 602 are driven to move in the interior of the experimental cylinder 1 through the extruding action, in the process of movement of the transmission plate 602, the mounting frame 601 and the clamping plate 401 are driven to move towards the outer side of the packer through the interaction of the inclined groove 603 and the transmission rod 604, in the process of movement, the arc-shaped groove 402 on the clamping plate 401 abuts against the outer side of the packer, the packer after placement is clamped through the abutting action of the arc-shaped grooves 402 on the clamping plates 401 and the four sides of the packer, and when the plugs 302 are taken out after the experiment, the clamping plates 401 are reset through the elastic action of the guide telescopic assembly, the clamping plates 401 contact the packer, therefore, in the process of packer experiment, the clamping and loosening of the packer can be realized synchronously through the installation and disassembly of the plugs 302, and the rapid installation and disassembly operation of the packer in the experimental process is facilitated.

Claims

1. A differential pressure testing device for packers, comprising: Experimental tube (1) used for packer experiment placement; Its characteristic is that it further includes: The experimental tube (1) is equipped with a positioning component for assisting in the initial positioning of the packer and a clamping component for clamping after positioning. The upper and lower ends of the experimental tube (1) are provided with sealing and pressure-bearing components for sealing and pressure-bearing during the experiment. The sealing and pressure-bearing assembly includes mounting grooves (301) at the upper and lower ends of the experimental cylinder (1). A plug (302) is detachably installed on the mounting groove (301) by means of threads. A gas pipe (303) for supplying and depressurizing is provided on the plug (302). The gas pipe (303) is connected to the interior of the experimental cylinder (1).

2. The packer differential pressure testing device according to claim 1, characterized in that, The clamping assembly is symmetrically arranged in two sets at the upper and lower ends of the experimental cylinder (1). The clamping assembly includes multiple sets of clamping plates (401) disposed inside the experimental cylinder (1), and each set of clamping plates (401) is arranged in a circular array. Each set of clamping plates (401) is provided with an arc-shaped groove (402) for abutting against the outside of the packer. The interior of the experimental cylinder (1) is provided with a transmission assembly for transmitting the clamping plates (401) and a telescopic guide assembly for telescopic guidance during transmission.

3. The packer differential pressure testing device according to claim 2, characterized in that, The transmission assembly includes two sets of mounting brackets (601) fixed to the back of the clamping plate (401), a transmission plate (602) is provided between the two sets of mounting brackets (601), a groove (603) is provided on the transmission plate (602), a transmission rod (604) is slidably connected to the groove (603), the transmission rod (604) is fixed between the two sets of mounting brackets (601), and a pushing assembly for pushing the transmission plate (602) is provided inside the experimental cylinder (1).

4. The packer differential pressure testing device according to claim 3, characterized in that, The pushing assembly includes a push rod (702) slidably connected inside the experimental tube (1). One end of the push rod (702) is located inside the mounting groove (301), and the other end of the push rod (702) is fixed with a connecting plate (701). The connecting plate (701) is fixed to the upper end of the transmission plate (602).

5. The packer differential pressure testing device according to claim 4, characterized in that, The telescopic guide assembly includes a sleeve (501) fixed inside the experimental tube (1), and a slide rod (502) is slidably connected to each set of sleeves (501). One end of the slide rod (502) is fixed to one side of the clamping plate (401), and a spring (503) is sleeved on the outside of each set of sleeves (501). The two ends of the spring (503) are respectively connected to the clamping plate (401) and the inner wall of the experimental tube (1).

6. The packer differential pressure testing device according to claim 1, characterized in that, The positioning component includes an annular groove (201) formed inside the experimental tube (1), and an annular sealing gasket (202) for positioning against the outside of the packer is installed inside the annular groove (201).

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