Multi-channel internal blowout prevention tool pressure test device

Abstract

The invention discloses a multi-channel internal blowout prevention tool pressure test device, and belongs to the technical field of petroleum drilling. Comprising a plurality of groups of pressure testing tools, a plurality of groups of pressure releasing and maintaining systems and an electric pressure testing pump system, the pressure test tool comprises an external thread pressure test plug, an internal thread pressure test plug and a tool rack provided with an internal blowout prevention tool fixing structure. The electric pressure test pump system comprises an electric pressure test pump connected with a variable frequency motor; an inlet of the electric pressure test pump is connected with a water suction pump through an electric pump water inlet pipe; the pressure releasing and maintaining system comprises a control electric cabinet, and a tubular check valve, a stop valve, a pneumatic flat valve and a sensor which are connected to the high-pressure pipe and connected with the control electric cabinet; the novel external thread pressure test plug and the novel internal thread pressure test plug are adopted in the pressure test tool to seal and plug the two ends of the internal blowout prevention tool, the novel pressure test plugs are adopted, the pressure test plugs at the two ends of the internal blowout prevention tool can be rapidly disassembled and assembled by using a conventional power tool, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling and relates to a multi-channel internal blowout prevention tool pressure testing device. Background Art

[0002] The drilling tool is mainly composed of square drill rods, drill pipes, drill collars, internal blowout preventers, etc., which are connected in series through two-end threads. There is an internal through-channel in the axial direction. It is the pipe string for the drilling rig to achieve drilling depth. The internal blowout preventer is a cylindrical short section with connecting threads at both ends. It is connected to the drilling tool. There is an internal channel in the axial direction. The channel has a one-way open and closed valve to achieve the flow of drilling fluid from the internal channel of the drilling tool from top to bottom and prevent the drilling fluid from flowing from the internal channel of the drilling tool from bottom to top. According to the requirements of GBT25429 "Specifications for Internal Blowout Preventers", the existing internal blowout preventers must undergo a sealing pressure test before leaving the factory, that is, the valve body and valve core of the internal blowout preventer must undergo a sealing pressure test before leaving the factory, and they can only be used if they pass the test.

[0003] The existing internal blowout prevention tool pressure test device is a single head for pressure testing, and the pressure gauge readings need to be read manually for pressure and pressure relief, which has poor operability; after the test, it is necessary to manually enter the pressure test tank to pull the pressure relief valve to relieve the pressure, which has high safety risks; in addition, most of the existing pressure test devices are structurally complex and use high-pressure hydraulic seals, which are labor-intensive during assembly and disassembly, and can barely meet production needs under the condition of 3 overtime work, and the efficiency is low. For example, the Chinese invention patent with application number 201910331362.1 and the name of "A multi-station internal blowout prevention tool pressure test device for oil drilling" only solves the problem of multi-channel pressure testing of internal blowout prevention tools, and does not effectively solve the problems of high-pressure sealing and quick buckling, and does not solve the problem of quick buckling of the pressure test plug of the internal blowout prevention tool and the pressure test device. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems of complex structure, low efficiency and poor safety of the internal blowout prevention tool pressure testing device in the prior art, and to provide a multi-channel internal blowout prevention tool pressure testing device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a multi-channel internal blowout prevention tool pressure test device, comprising a plurality of pressure test tooling sets, a plurality of pressure relief and pressure maintaining systems and an electric pressure test pump system; the pressure test tooling sets comprise an external thread pressure test plug, an internal thread pressure test plug and a tooling frame provided with an internal blowout prevention tool fixing structure; the external thread pressure test plug and the internal thread pressure test plug are both connected with a high-pressure hose;

[0007] The electric pressure test pump system includes an electric pressure test pump connected to a variable frequency motor; the inlet of the electric pressure test pump is connected to a water suction pump through an electric pump water inlet pipe, and the water suction pump is connected to a pressure test medium;

[0008] The pressure relief and pressure maintaining system includes a control electronic control box and a tubular check valve, a stop valve, a pneumatic flat valve and a sensor connected to the high-pressure pipe and the control electronic control box; the sensor is connected to a seismic-resistant pressure gauge; the inlet of the high-pressure pipe is connected to the outlet of the electric pressure test pump, and the outlet of the high-pressure pipe is connected to the high-pressure hose; the pressure test medium enters the water suction pump, the electric pressure test pump, the high-pressure pipe, the high-pressure hose in sequence, and then enters the internal blowout prevention tool for pressure testing.

[0009] A further improvement of the present invention is:

[0010] The inlet of the water suction pump is connected to a water tank for storing the pressure test medium; the water tank comprises a water tank body, and the water tank body is provided with a water inlet joint, a water outlet joint, a water outlet joint and an overflow joint.

[0011] The water tank body is also provided with a liquid level gauge and a water tank cover whose switch is a spring pin, and the water tank cover is provided with a breathing cap.

[0012] The internal blowout prevention tool fixing structure includes a tightening screw fixedly connected to the tooling frame and a plurality of coaxial V-shaped blocks with openings facing upward, wherein the V-shaped block is used to place the internal blowout prevention tool; the tightening screw is threadedly connected with a butterfly nut and a clamping block in sequence from top to bottom; the lower part of the clamping block is provided with an arc surface structure adapted to the internal blowout prevention tool, which is used to clamp the internal blowout prevention tool placed on the V-shaped block.

[0013] The high-pressure pipe is also provided with a high-pressure relief valve.

[0014] The tubular check valve, the stop valve, the high-pressure relief valve, the pneumatic flat valve and the sensor are all fixed on the shock-absorbing frame.

[0015] The variable frequency motor and the electric pressure test pump are connected via a coupling, and an integral bell housing is arranged between the two.

[0016] The pressure test tool is placed in the header room, and the high voltage is isolated during the pressure test; the top of the header room is provided with a lifting lug, and the bottom is provided with a forklift hole.

[0017] The high-pressure pipe is provided with a high-pressure five-way block; the seismic-resistant pressure gauge is connected to a pressure gauge tube, and the pressure gauge tube is connected to the sensor through the high-pressure five-way block.

[0018] The pressure testing tooling and the pressure relief and pressure maintaining system are both provided with five groups.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention discloses a multi-channel internal blowout prevention tool pressure testing device, which integrates several groups of pressure testing tooling and pressure relief and pressure maintaining systems. Users can freely select the number of groups of pressure testing tooling and pressure relief and pressure maintaining systems according to working conditions, and can perform pressure testing on several internal blowout prevention tools at the same time, thereby improving the pressure testing efficiency. In the pressure testing tooling, new external threaded pressure testing plugs and internal threaded pressure testing plugs are used to seal and plug the two ends of the internal blowout prevention tool. The new pressure testing plugs can be used to quickly disassemble and assemble the pressure testing plugs at the two ends of the internal blowout prevention tool using conventional power tools, thereby reducing labor intensity. The valves and other components in the pressure relief and pressure maintaining system are all connected to the control electric control box, and the sensor on the high-pressure pipe is connected to a seismic-resistant pressure gauge, and remote monitoring and remote control are realized through gas-liquid energy conversion, so that the operating personnel and the high-pressure area are isolated, thereby reducing the operating risk.

[0021] Furthermore, the pneumatic flat valve is used to maintain and release pressure at both ends of the test piece, the stop valve is used to manually release pressure from the test piece, the high-pressure relief valve is used to protect the system safety, the sensor is used to detect the system pressure, and the tubular check valve is used to ensure the one-way flow of the test medium, making the operation of the pressure test device more stable and safe.

[0022] Furthermore, the complete equipment is placed in the header room, and high-voltage isolation can be achieved during the pressure test to ensure the personal safety of the operator. The top of the header room is equipped with lifting lugs and the bottom has forklift holes for easy loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 Schematic diagram of the structure of a five-channel internal blowout prevention tool pressure testing device in an embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of a pressure test tool in an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the electric pressure test pump system in an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the pressure relief and pressure maintaining system in an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of the structure of a water tank in an embodiment of the present invention.

[0029] Among them: 1-water tank; 2-seismic pressure gauge; 3-pneumatic flat valve; 4-sensor; 5-water suction pump; 6-electric pressure test pump; 7-external thread pressure test plug; 8-pressing block; 9-skid base; 10-control electric control box; 11-stop valve; 12-high pressure relief valve; 13-frequency conversion motor; 14-internal thread pressure test plug; 15-high pressure hose; 16-V-block; 17-tooling frame; 18-tightening screw; 19-butterfly nut; 20-water suction Pump water inlet pipe; 21-high-pressure output hose; 22-integral bell; 23-electric pump water inlet pipe; 24-pressure gauge tube; 25-high-pressure five-way block; 26-high-pressure pipe; 27-drain pipe; 28-liquid level gauge; 29-water tank body; 30-drain connector; 31-water outlet connector; 32-spring pin; 33-water tank cover; 34-handle; 35-breathing cap; 36-water inlet connector; 37-overflow connector; 38-shock absorber frame; 39-tubular check valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0037] See also Figure 1 The embodiment of the present invention discloses a multi-channel internal blowout prevention tool pressure test device, specifically a five-channel internal blowout prevention tool pressure test device, including five groups of pressure test tools, five groups of pressure relief and pressure maintaining systems and an electric pressure test pump system; the pressure test tool includes an external threaded pressure test plug 7, an internal threaded pressure test plug 14 and a tool frame 17 provided with an internal blowout prevention tool fixing structure; the external threaded pressure test plug 7 and the internal threaded pressure test plug 14 are both connected with a high-pressure hose 15; the internal blowout prevention tool fixing structure includes a tightening screw 18 fixedly connected to the tool frame 17 and a plurality of V-shaped blocks 16 with upward openings and coaxial, and the V-shaped block 16 is used to place the internal blowout prevention tool; the tightening screw 18 is threadedly connected with a butterfly nut 19 and a clamping block 8 in sequence from top to bottom; the lower part of the clamping block 8 is provided with an arc surface structure adapted to the internal blowout prevention tool, which is used to clamp the internal blowout prevention tool placed on the V-shaped block 16.

[0038] The electric pressure test pump system includes an electric pressure test pump 6 connected to a variable frequency motor 13; the inlet of the electric pressure test pump 6 is connected to a water suction pump 5 through an electric pump water inlet pipe 23, and the water suction pump 5 is connected to a pressure test medium;

[0039] The pressure relief and pressure maintaining system includes a control electric control box 10 and a tubular check valve 39, a stop valve 11, a pneumatic flat valve 3 and a sensor 5 connected to the high-pressure pipe 26 and connected to the control electric control box 10; the sensor 5 is connected to a seismic-resistant pressure gauge 2; the inlet of the high-pressure pipe 26 is connected to the outlet of the electric pressure test pump 6, and the outlet of the high-pressure pipe 26 is connected to the high-pressure hose 15; the pressure test medium enters the water suction pump 6, the electric pressure test pump 6, the high-pressure pipe 26, and the high-pressure hose 15 in turn, and then enters the internal blowout preventer tool for pressure testing. The equipment is divided into five outputs, and five internal blowout preventers can be pressure tested at the same time, and each channel does not affect each other. The external threaded pressure test plug and the internal threaded pressure test plug are connected to the pressure test pipeline to realize the sealing pressure test of the internal blowout preventer tool.

[0040] The pressure test process is controlled by the control box 10, which can automatically or manually control the opening / closing of the electric pressure test pump 6, complete the pressure application and pressure maintenance process according to the set pressure, and record various test data in real time to generate graphs and reports.

[0041] The complete equipment is placed in the header room. High voltage isolation can be achieved during the pressure test to ensure the personal safety of the operator. The top of the header room is equipped with lifting lugs and the bottom has forklift holes for easy loading and unloading.

[0042] See also Figure 2 The tooling frame 17 is fixed on the skid base 9, the V-shaped block 16 is welded on the tooling frame 17, the tightening screw 18 is connected to the tooling frame 17 through a thread, the clamping block 8 and the butterfly nut 19 are connected to the tightening screw 18 through a thread, and cooperate with the V-shaped block 16 to fix the workpiece. The external thread pressure test plug 7 and the internal thread pressure test plug 14 are connected to the high-pressure hose 15, and the pressure test of the workpiece is realized through the connection with the workpiece through the thread.

[0043] See also Figure 3 The electric pressure test pump 6 is connected to the variable frequency motor 13 through a coupling, and the integral bell cover 22 is fixed between the electric pressure test pump 6 and the variable frequency motor 13 to play a protective role. The water suction pump 5 is connected to the electric pressure test pump 6 through the electric pump water inlet pipe 23, the water suction pump water inlet pipe 20 is connected to the water inlet end of the water suction pump 5, and the high-pressure output hose 21 is connected to the water outlet end of the electric pressure test pump 6. The pressure test medium is supplied to the electric pressure test pump 6 by the water suction pump 5 through the water suction pump water inlet pipe 20 and the electric pump water inlet pipe 23, and the variable frequency motor 13 drives the electric pressure test pump 6 to increase the pressure of the pressure test medium and output it through the high-pressure output hose 21.

[0044] See also Figure 4, pneumatic flat valve 3, sensor 4, stop valve 11, high-pressure relief valve 12 and other components are connected through high-pressure pipe 26 and fixed on shock-absorbing frame 38. Pneumatic flat valve 3 is used for pressure maintenance and pressure relief at both ends of the test piece. Stop valve 11 is used for manual pressure relief of the test piece. High-pressure relief valve 12 is used to protect system safety. Sensor 4 is used to detect system pressure. Tubular check valve 39 is used to ensure unidirectional flow of pressure test medium. One end of pressure gauge tube 24 is connected to seismic pressure gauge 2, and the other end is connected to sensor 4 through high-pressure five-way block 25 to transmit the pressure value to the seismic pressure gauge. During pressure test, the pressure test medium flows into high-pressure pipe 26 through high-pressure output hose 21, and flows into external thread pressure test plug 7 and internal thread pressure test plug 14 through tubular check valve 39 and pneumatic flat valve 3. Pressure maintenance and pressure relief of the workpiece are achieved by changing the switch state of pneumatic flat valve 3.

[0045] See also Figure 5 The water tank body 29 is connected to the water outlet joint 31 through the water inlet pipe 20 of the water pump to supply liquid to the system, and the water inlet joint 36 is connected to the water inlet pipe to fill the tank body with liquid. The liquid level meter 28 can display the liquid level. When the liquid level is higher than a certain value, the liquid is discharged through the overflow joint 37. A water tank cover 33 is installed on the upper part of the water tank body 29, and the water tank cover 33 is opened and closed by a spring pin 32.

[0046] The embodiment of the present invention is composed of a pneumatic flat valve 3, a sensor 4, a water suction pump 5, an electric pressure test pump 6, a seismic-resistant pressure gauge 2, a liquid level gauge 28, a water tank body 29, a water tank cover 33, an externally threaded pressure test plug 7, a clamping block 8, a skid-mounted base 9, a stop valve 11, a high-pressure relief valve 12, a variable frequency motor 13, an internally threaded pressure test plug 14, a V-block 16, a tooling frame 17, a tightening screw 18, a butterfly nut 19, a shock-absorbing frame 38, a tubular check valve 39, a control electronic control box 10, etc. The pneumatic flat valve 3, sensor 4, seismic pressure gauge 2, stop valve 11, high-pressure relief valve 12, tubular check valve 39, etc. constitute the pressure-maintaining and pressure-relieving system; the water suction pump 5, electric pressure test pump 6, variable frequency motor 13, shock-absorbing frame 38, etc. constitute the pressure test pump system; the level gauge 28, water tank body 29, water tank cover 33, etc. constitute the water tank system; the external thread pressure test plug 7, clamping block 8, skid-mounted base 9, internal thread pressure test plug 14, V-block 16, tooling frame 17, tightening screw 18, butterfly nut 19, etc. constitute the test tooling system. The equipment is divided into five outputs, which can test the pressure of five internal blowout prevention tools at the same time, and each channel does not affect each other. The external thread pressure test plug and the internal thread pressure test plug are connected to the pressure test pipeline to realize the sealing pressure test of the internal blowout prevention tool.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-channel internal blowout prevention tool pressure testing device, characterized in that: The invention comprises a plurality of pressure test tools, a plurality of pressure relief and pressure maintaining systems and an electric pressure test pump system; the pressure test tools comprise an externally threaded pressure test plug (7), an internally threaded pressure test plug (14) and a tool frame (17) provided with an internal blowout prevention tool fixing structure; the externally threaded pressure test plug (7) and the internally threaded pressure test plug (14) are both connected to a high-pressure hose (15); The electric pressure test pump system comprises an electric pressure test pump (6) connected to a variable frequency motor (13); the inlet of the electric pressure test pump (6) is connected to a water suction pump (5) via an electric pump water inlet pipe (23), and the water suction pump (5) is connected to a pressure test medium; The pressure relief and pressure maintaining system comprises a control electric control box (10) and a tubular check valve (39), a stop valve (11), a pneumatic flat valve (3) and a sensor (5) connected to a high-pressure pipe (26) and connected to the control electric control box (10); the sensor (5) is connected to a shock-resistant pressure gauge (2); the inlet of the high-pressure pipe (26) is connected to the outlet of the electric pressure test pump (6), and the outlet of the high-pressure pipe (26) is connected to the high-pressure hose (15); the pressure test medium sequentially enters the water suction pump (6), the electric pressure test pump (6), the high-pressure pipe (26), and the high-pressure hose (15) and then enters the internal blowout prevention tool for pressure testing.

2. The multi-channel internal blowout prevention tool pressure testing device according to claim 1 is characterized in that: The inlet of the water suction pump is connected to a water tank for storing a pressure test medium; the water tank comprises a water tank body (29), and the water tank body (29) is provided with a water inlet joint (36), a water outlet joint (30), a water outlet joint (21) and an overflow joint (37).

3. The multi-channel internal blowout prevention tool pressure testing device according to claim 2 is characterized in that: The water tank body (29) is also provided with a liquid level meter (28) and a water tank cover (33) whose switch is a spring pin (32), and a breathing cap (35) is provided on the water tank cover (33).

4. The multi-channel internal blowout prevention tool pressure testing device according to claim 1 is characterized in that: The internal blowout prevention tool fixing structure comprises a tightening screw (18) fixedly connected to a tooling frame (17) and a plurality of coaxial V-shaped blocks (16) with openings facing upward, wherein the V-shaped blocks (16) are used to place the internal blowout prevention tool; the tightening screw (18) is threadedly connected with a butterfly nut (19) and a pressing block (8) in sequence from top to bottom; the lower part of the pressing block (8) is provided with an arc surface structure adapted to the internal blowout prevention tool, and is used to press the internal blowout prevention tool placed on the V-shaped block (16).

5. The multi-channel internal blowout prevention tool pressure testing device according to claim 1 is characterized in that: The high-pressure pipe (26) is also provided with a high-pressure relief valve (12).

6. The multi-channel internal blowout prevention tool pressure testing device according to claim 5 is characterized in that: The tubular check valve (39), the stop valve (11), the high-pressure relief valve (12), the pneumatic flat valve (3) and the sensor (5) are all fixed on the shock-absorbing frame (38).

7. The multi-channel internal blowout prevention tool pressure testing device according to claim 1 is characterized in that: The variable frequency motor (13) and the electric pressure test pump (6) are connected via a coupling, and an integral bell housing (22) is provided between the two.

8. The multi-channel internal blowout prevention tool pressure testing device according to claim 1 is characterized in that: The pressure test tool is placed in the header room, and the high voltage is isolated during the pressure test; the top of the header room is provided with a lifting lug, and the bottom is provided with a forklift hole.

9. The multi-channel internal blowout prevention tool pressure testing device according to claim 1, characterized in that: The high-pressure pipe (26) is provided with a high-pressure five-way block (25); the seismic-resistant pressure gauge (2) is connected to a pressure gauge pipe (24), and the pressure gauge pipe (24) is connected to the sensor (5) via the high-pressure five-way block (25).

10. The multi-channel internal blowout prevention tool pressure testing device according to claim 1, characterized in that: The pressure testing tooling and the pressure relief and pressure maintaining system are both provided with five groups.

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