Testing blanking plug

Abstract

The utility model relates to a testing blanking plug which comprises a pressing cap, an upper connector, a connecting body, a lower connector, a packing, a piston, a positioning sleeve, a spring, a first O-shaped ring, a second O-shaped ring and a jackscrew. The upper end of the pressing cap is connected with a tool in series, the lower end of the pressing cap is connected with the upper connector in a threaded mode, the packing is installed at the connecting position of the pressing cap and the upper connector, the connecting body is connected with the positioning sleeve in a threaded mode, and the jackscrew is installed at the connecting position of the connecting body and the positioning sleeve. The device is simple and reasonable in structural design and convenient to operate and use; the testing blanking plug is characterized in that the packing is arranged in the blanking plug, the sealing effect is good, the blanking plug is set on the upper sealing face of the working barrel, and the sealing mode is O-shaped ring sealing; a jackscrew is arranged, automatic deblocking is not prone to occurring when the well descends, displacement of the positioning sleeve is controlled through the jackscrew, and movement of the piston is achieved through vertical movement of the positioning sleeve. The product is simple and reasonable in structure, convenient to operate and safe and reliable in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of test plugs, in particular to a test plug. Background Art

[0002] In the normal production process of electric pump oil wells, in order to obtain the temperature, pressure, flow rate and fluid properties of each production layer of the fluid, it is necessary to dynamically monitor the oil well through production logging to obtain the relevant dynamic parameters. Well logging is carried out under the normal operation of the electric pump. In order to ensure the normal operation of the electric pump, a test plug is currently used to replace the production plug. The test plug is located inside the "Y"-shaped working cylinder. Through the sealing surface and sealing ring matching the inner wall of the working cylinder, the working cylinder is sealed to ensure the operation of the electric pump, thereby realizing the normal production of the oil well; the logging cable passes through the center of the test plug body, carrying the logging instrument to be lifted or lowered at different speeds to complete the data collection and recording work. Therefore, in addition to the sealing function of the production plug, the test plug should also have the characteristics of satisfying the free movement of the logging cable and ensuring the sealing between the cable and the inside of the test plug.

[0003] In the existing technology, the test plugs on the market have a complex structure and poor sealing effect. When the cable is locked due to improper adjustment of the tightness of the tower rubber sealing packing and logging cannot be carried out, the on-site operators have to take out the test plug from the well and readjust the tightness, which leads to high rework rate and low time efficiency. Or leakage occurs due to wear, making the measured data distorted and invalid. When the leakage is serious, the electric pump will run abnormally or even burn out, and the production string needs to be replaced and repaired, which is very expensive. This drawback of the existing test plug not only affects the normal production of the current oil well and reduces the wellhead production, but also seriously hinders the normal logging operation, reduces the time efficiency of the operation, and increases the risk of the operation. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a test plug, which has a simple and reasonable structural design and is easy to operate and use; the characteristics of the test plug are: packing is arranged inside the plug, which has a good sealing effect, the plug is sealed at the upper sealing surface of the working cylinder, and its sealing method is O-ring sealing; it has a top screw, which is not easy to automatically unseal when going down the well, the displacement of the positioning sleeve is controlled by the top screw, and the movement of the piston is achieved by the up and down movement of the positioning sleeve. The product has a simple and reasonable structure, convenient operation, and safe and reliable performance.

[0005] The above utility model object of the utility model is achieved through the following technical solutions:

[0006] A test plug includes a pressure cap, an upper joint, a connector, a lower joint, a packing, a piston, a positioning sleeve, a spring, a first O-ring, a second O-ring and a top screw;

[0007] The upper end of the pressure cap is connected in series with the tool, the lower end of the pressure cap is threadedly connected to the upper joint, the packing is installed at the connection between the pressure cap and the upper joint, the connector is threadedly connected to the positioning sleeve, and the top screw is installed at the connection between the connector and the positioning sleeve.

[0008] As a further technical solution of the utility model: the first O-ring is arranged on the piston, and the second O-ring is arranged on the upper joint.

[0009] As a further technical solution of the utility model: the piston is installed in the upper joint.

[0010] As a further technical solution of the utility model: the spring is installed in the cavity between the upper joint and the piston.

[0011] As a further technical solution of the utility model: the connector is installed between the upper joint and the lower joint.

[0012] As a further technical solution of the utility model: the positioning sleeve is installed in the connecting body.

[0013] In summary, the utility model includes at least one of the following beneficial technical effects:

[0014] The utility model discloses a test plug, which has a simple and reasonable structure design and is easy to operate and use. The characteristics of the test plug are: packing is arranged inside the plug, which has a good sealing effect. The plug is sealed at the upper sealing surface of the working cylinder, and its sealing method is O-ring sealing; it has a top screw, which is not easy to automatically unseal when going down the well. The displacement of the positioning sleeve is controlled by the top screw, and the movement of the piston is achieved by the up and down movement of the positioning sleeve. The product has a simple and reasonable structure, convenient operation, and safe and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure numerals: 1, pressure cap; 2, upper joint; 3, connector; 4, lower joint; 5, packing; 6, piston; 7, positioning sleeve; 8, spring; 9, first O-ring; 10, second O-ring; 11, top screw. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0018] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. Example

[0020] Reference Figure 1 , a test plug disclosed by the utility model, comprises a pressure cap 1, an upper joint 2, a connector 3, a lower joint 4, a packing 5, a piston 6, a positioning sleeve 7, a spring 8, a first O-ring 9, a second O-ring 10 and a top screw 11. The tool is mainly used for oil pipe pressure testing to determine whether the oil pipe has leakage and to isolate the formation. The design of the packing 5 has a good sealing effect and is mainly used for oil pipe pressure testing to determine whether the oil pipe has leakage and to isolate the formation.

[0021] The upper end of the pressure cap 1 is connected in series with the tool and can be lowered into the well. The lower end of the pressure cap 1 is threadedly connected to the upper joint 2. The packing 5 is installed at the connection between the pressure cap 1 and the upper joint 2. The packing 5 is arranged in the upper joint 2. The connector 3 is threadedly connected to the positioning sleeve 7. The top screw 11 is installed at the connection between the connector 3 and the positioning sleeve 7. It is not easy to automatically unseal when lowered into the well.

[0022] The first O-ring 9 is arranged on the piston 6, and the second O-ring 10 is arranged on the upper joint 2; the piston 6 is installed in the upper joint 2; the spring 8 is installed in the cavity between the upper joint 2 and the piston 6; the connecting body 3 is installed between the upper joint 2 and the lower joint 4; the positioning sleeve 7 is installed in the connecting body 3.

[0023] The upper joint 2 is connected to the connector 3 by threads, and the lower end of the connector 3 is connected to the lower joint 4; the positioning sleeve 7 is fixed by the connector 3 to prevent downward movement; the first O-ring 9 and the second O-ring 10 are respectively arranged on the piston 6 and the upper joint 2 to seal the fluid; the top screw 11 is installed between the connector 3 and the positioning sleeve 7, and the upward movement can be achieved when the top screw 11 is cut.

[0024] The piston 6 is installed in the upper joint 2, and a first O-ring 9 is arranged between them to limit the stroke of the piston 6. A spring 8 is installed between the piston 6 and the upper joint 2 so that the piston 6 can be automatically blocked; the upper end of the lower joint 4 is connected to the connector 3 by a thread and is used to salvage the rope cap head.

[0025] Working principle: first install the first O-ring 9 on the piston 6, install the spring 8 and the piston 6 of the first O-ring 9 from the lower end of the upper joint 2, and then install the positioning sleeve 7 from the upper end of the connector 3; then connect the upper end of the connector 3 with the upper joint 2, and connect the upper end of the lower joint 4 with the lower end of the connector 3, install the top screw 11 between the connector 3 and the positioning sleeve 7, install the packing 5 on the upper end of the upper joint 2 and install the pressure cap 1; install the second O-ring 10 on the upper joint 2, and the assembly is completed. The test plug of the utility model has a simple and reasonable structural design, good plugging effect, strong applicability, and is suitable for promotion and application.

[0026] It should be noted that all kinds of components used in this application document are standard parts and can be purchased on the market. The specific connection methods of each part adopt conventional means such as mature bolts, rivets and welding in the existing technology. Machinery, parts and electrical equipment all adopt conventional models in the existing technology. Circuit connections adopt conventional connection methods in the existing technology. Electrical equipment are connected to an external safe power supply, and no specific description is given here.

[0027] The implementation principle of the utility model is as follows: the utility model discloses a test plug, which has a simple and reasonable structural design and is easy to operate and use; the characteristics of the test plug are: a packing 5 is arranged inside the plug, which has a good sealing effect, the plug is sealed at the upper sealing surface of the working cylinder, and its sealing method is an O-ring seal; it has a top screw 11, which is not easy to automatically unseal when going down the well, the displacement of the positioning sleeve 7 is controlled by the top screw 11, and the movement of the piston 6 is achieved by the up and down movement of the positioning sleeve 7. The product has a simple and reasonable structure, convenient operation, and safe and reliable performance.

[0028] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A test plug, characterized in that: It comprises a pressure cap (1), an upper joint (2), a connector (3), a lower joint (4), a packing (5), a piston (6), a positioning sleeve (7), a spring (8), a first O-ring (9), a second O-ring (10) and a top screw (11); The upper end of the pressure cap (1) is connected in series with the tool, the lower end of the pressure cap (1) is threadedly connected to the upper joint (2), the packing (5) is installed at the connection between the pressure cap (1) and the upper joint (2), the connector (3) is threadedly connected to the positioning sleeve (7), and the top screw (11) is installed at the connection between the connector (3) and the positioning sleeve (7).

2. A test plug according to claim 1, characterized in that: The first O-ring (9) is arranged on the piston (6), and the second O-ring (10) is arranged on the upper joint (2).

3. A test plug according to claim 1, characterized in that: The piston (6) is installed in the upper joint (2).

4. A test plug according to claim 1, characterized in that: The spring (8) is installed in the cavity between the upper joint (2) and the piston (6).

5. A test plug according to claim 1, characterized in that: The connecting body (3) is installed between the upper joint (2) and the lower joint (4).

6. A test plug according to claim 1, characterized in that: The positioning sleeve (7) is installed in the connecting body (3).

Images