Pressure tapping tool

Abstract

The utility model provides an under-pressure tapping tool, which relates to the field of tapping tools and comprises a drill rod, a sealing sleeve, a sealing component and a gland. The tip of the drill rod is a drill bit, and the other end is a power drill rod; the sealing sleeve comprises a threaded section I and a threaded section II with the inner diameter larger than that of the threaded section I. Threads are arranged outside the whole sealing sleeve, the threaded section I is in threaded connection with the high-pressure connector, a check block is arranged in the threaded section II to divide the interior of the threaded section II into two parts, and a sealing assembly between the drill bit and the check block is a sealing piece I; the sealing element I is hermetically connected with the drill rod to ensure that oil gas does not pass between the sealing element I and the drill rod; a certain distance is formed between the sealing element I and the inner surface of the threaded section II; the sealing assembly between the power drill rod end and the check block is a sealing piece II, and the inner and outer parts of the sealing piece II are in sealing connection with the drill rod and the inner surface of the threaded section II respectively; the gland is inserted into the drill rod from the power drill rod end and is fixedly connected with the threaded section II through threads; the controllable drilling device has the beneficial effect that controllable drilling is achieved for long-stop wells and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of hole-punching tooling and provides a pressure-assisted hole-punching tooling. Background Art

[0002] Due to the needs of geological development, it is necessary to perform pressure drilling on long-stop wells and shutdown wells with sealed casing heads. Electric drilling tools are directly used to manually drill holes in the oil pipes of long-stop wells and shutdown wells. The instantaneous pressure after successful drilling may bounce the electric drilling tool off, causing personal injury, and oil and gas may also spray out, which not only pollutes the wellhead, but also has the risk of fire and explosion once encountering open flames. For this reason, we have specially developed a pressure drilling tool to solve the above problems. Summary of the invention

[0003] The purpose of the utility model is to design a pressure-bearing hole-opening tool for long-stopped wells and shutdown wells in oil fields. It is impossible to control the pressure release of uncontrollable surface sleeves, technical sleeves and oil sleeves. It is necessary to weld a high-pressure joint on the main body. After the pressure is qualified, it is connected with the hole-opening tooling to perform controllable hole opening.

[0004] The technical solution of the utility model is:

[0005] A pressure-drilling tool, comprising a drill rod, a sealing sleeve penetrated by the drill rod and having a certain gap between the sealing sleeve and the drill rod, a sealing assembly arranged between the drill rod and the sealing sleeve, and a gland threadedly connected to one end of the sealing sleeve;

[0006] The tip of the drill rod is a drill bit, and the other end is a power drill rod; the front end of the power drill rod is provided with a square head, which is connected to the drill and the hydraulic pump. When the hydraulic source is turned on, the drill rod is driven to rotate, and the drill bit of the drill rod can drill the wellhead, oil pipe, etc.

[0007] In order to facilitate manual drilling, a "straight" handle is provided on the drill rod at the end of the power drill rod, and the drill bit of the drill rod is further driven to rotate to drill holes by twisting the handle;

[0008] The sealing sleeve comprises a threaded section I and a threaded section II whose inner diameter is larger than that of the threaded section I. The sealing sleeve is provided with threads on the outside. The threaded section I is threadedly connected to the high-pressure joint, and the gland is threadedly connected to the sealing sleeve. A stopper is provided inside the threaded section II to divide the inside of the threaded section II into two parts. There is a certain gap between the center hole of the stopper and the drill pipe. Sealing components are provided inside the threaded section II on both sides of the stopper. The sealing component between the drill bit and the stopper is a seal I. The seal I is sealedly connected to the drill pipe to ensure that oil and gas do not pass between the seal I and the drill pipe. There is a certain distance between the seal I and the inner surface of the threaded section II to ensure that oil and gas pass through the gap between the threaded section II and the seal I. The sealing component between the power drill pipe and the stopper is a seal II. The inner and outer parts of the seal II are respectively sealedly connected to the drill pipe and the inner surface of the threaded section II to ensure that oil and gas are sealed between the drill bit and the stopper.

[0009] Furthermore, the stopper and the sealing sleeve are not integrated, the sealing sleeve is provided with threads inside, the stopper is provided with threads outside, and the two are connected by threads;

[0010] The gland is inserted into the drill pipe from the end of the power drill pipe and fixedly connected with the threaded section II through threads, and the sealing member II is further fixed between the sealing sleeve and the gland;

[0011] Furthermore, at least two threaded holes penetrating the gland are provided on the circumference of the gland, and corresponding threaded holes are provided on the threaded section II, and the gland and the threaded section II are further connected by screwing screws into the two;

[0012] Furthermore, there is a certain gap between the sealing member II and the gland;

[0013] An anti-dropout block is provided between the seal II and the gland, and the anti-dropout block is fixedly connected to the drill rod and stuck inside the gland to prevent the drill rod from being ejected due to pressure, and a certain gap exists between the seal II and the anti-dropout block after connection;

[0014] Furthermore, a thread is arranged inside the center hole of the anti-slip block, a thread is arranged outside the drill rod, the anti-slip block and the drill rod are fixedly connected by the thread, the anti-slip block is made of metal, and a rubber pad is arranged between the anti-slip block and the gland;

[0015] Furthermore, the sealing member I and the sealing member II may both adopt a high-pressure sealing ring or a combination of a high-pressure sealing ring and other sealing devices, and other sealing devices include packing and a pressure cap commonly used in the industry;

[0016] Furthermore, a concave surface is provided on the stopper on one side of the sealing member I, and a certain gap is provided between the stopper and the drill pipe. Therefore, after drilling, oil and gas enter the concave surface through the gap between the sealing sleeve and the sealing member I. Due to the flow-guiding effect of the concave surface, the sealing member I is impacted. Therefore, the pressure-drilling tool generates a back force, and thus can meet the drilling requirements of high pressure.

[0017] Further, the diameter of the seal Ⅰ from the drill bit end to the power drill rod end gradually increases;

[0018] Furthermore, the threaded section II is provided with two pipe joints, one of which is connected to a discharge valve, and the other is connected to a pressure gauge, and the other end of the pipe joint is connected to the interior of the threaded section II;

[0019] Furthermore, before construction, it is necessary to weld a high-pressure joint on the surface of the surface sleeve, technical sleeve, oil sleeve, etc. where the hole is to be opened. The high-pressure joint is similar to a circular joint with an opening. Different sizes and types of high-pressure joints are welded according to different needs. The high-pressure joint is provided with a hole for threaded connection of the drill pipe;

[0020] The advantages and positive effects of the utility model are:

[0021] This application is a professional pressure-opening tool designed for long-stopped wells and shutdown wells in oil fields. It is impossible to control the pressure release of uncontrollable surface sleeves, technical sleeves, and oil sleeves. It is necessary to weld a high-pressure joint on the main body. After the pressure is qualified, it is connected with this opening tool for controllable opening.

[0022] Specifically: by welding a high-pressure joint on the surface of a surface sleeve, a technical sleeve, an oil sleeve, etc. to be drilled, the sealing sleeve of the device is threadedly connected to the threaded hole on the high-pressure joint, and a cavity is provided in the sealing sleeve. Therefore, when the drill rod is manually twisted to drill a hole on the surface of the object to be drilled, oil and gas will enter the cavity and be collected, so they will not scatter near the wellhead and pollute the environment. Since the high-pressure joint is welded to the object with a hole, and the sealing sleeve is threadedly connected to the high-pressure joint, a restrictive effect is generated. Therefore, the pressure after the hole is opened will not cause the pressure-bearing hole-opening tooling to be bounced open, thereby ensuring the safety of personnel.

[0023] Depending on the drilling requirements of different working conditions, you can choose to drill the hole manually, or you can use the square head at the front end of the power drill pipe to connect the hydraulic pump for electric drilling.

[0024] After drilling, oil and gas will enter the gap between the drill pipe and the sealing sleeve. Due to the sealing effect of seal II, oil and gas will not enter the gap between seal II and the gland, and will not spray around the wellhead. The gland and the sealing sleeve are threaded together to limit seal II between the seal sleeve and the gland, so it will not be ejected in any direction to cause personal injury. Since there is a certain gap between seal II and the anti-slip block, the pressure will not directly press the gland, which plays a buffering role. Since the block on one side of seal I is provided with a concave surface, and there is a certain gap between the block and the drill pipe, after drilling, oil and gas enter the concave surface through the gap between the sealing sleeve and seal I. Due to the diversion effect of the concave surface, it will impact seal I. Therefore, this pressure drilling tool generates a back force and can adapt to the needs of drilling with high pressure. Therefore, the pressure drilling range of the traditional pressure drilling tool is about 10Mpa, and this application can meet the drilling needs of 40-50Mpa.

[0025] After the hole is opened, the pressure is displayed on the pressure gauge and the oil and gas are discharged through the discharge valve.

[0026] At least two threaded holes penetrating the gland are arranged on the circumference of the gland, and corresponding threaded holes are arranged on the threaded section II. The gland and the threaded section II are further connected by screwing screws into the two, further ensuring that the gland will not be ejected.

[0027] An anti-dropping block is provided between the seal II and the gland. The anti-dropping block is fixedly connected to the drill rod and is stuck inside the gland to prevent the drill rod from being ejected due to pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the pressure-opening tooling of the utility model.

[0029] In the figure:

[0030] 1. Drill pipe 2. Sealing sleeve 3. Sealing assembly

[0031] 1-1, drill bit 1-2, power drill rod 4, gland

[0032] 2-1, thread section I 2-2, thread section II 2-3, stopper

[0033] 3-1. Sealing element I 3-2. Sealing element II 4-1. Screw

[0034] 1-3, anti-drop block 5, discharge valve 6, pressure gauge DETAILED DESCRIPTION

[0035] The present embodiment provides a pressure-drilling tool, comprising a drill rod 1, a sealing sleeve 2 penetrated by the drill rod 1 and having a certain gap with the drill rod 1, a sealing assembly 3 arranged between the drill rod 1 and the sealing sleeve 2, and a gland 4 threadedly connected to one end of the sealing sleeve 2;

[0036] This time, the oil pipe of the shutdown well is pre-drilled. Before drilling, a high-pressure joint is welded on the oil pipe body of the shutdown well. The high-pressure joint is purchased on the market and welded to the oil pipe body. The high-pressure joint is provided with a hole for the drill pipe 1 to be threaded. After the pressure is qualified, the pressure-driving tool is installed. The specific structure of the pressure-driving tool is as follows:

[0037] The tip of the drill rod 1 is a drill bit 1-1, and the other end is a power drill rod 1-2. Since it is an oil pipe, electric drilling is avoided as much as possible. Manual drilling is used to drill the oil pipe. Therefore, in order to facilitate the rotation of the drill rod 1 to drill the object to be drilled, a horizontal handle is provided on the drill rod 1 at the end of the power drill rod 1-2 for easy rotation.

[0038] The sealing sleeve 2 is a hollow cylinder with an inner portion of a wine bottle. The sealing sleeve 2 includes a threaded section I2-1 and a threaded section II2-2 whose inner diameter is larger than that of the threaded section I2-1. The sealing sleeve 2 is provided with threads on the outside. The threaded section I2-1 is threadedly connected to the high-pressure joint. A stopper 2-3 is provided inside the threaded section II2-2 to divide the inside of the threaded section II2-2 into two parts. Further, the stopper 2-3 can be an annular ring with a through hole in the middle for the drill pipe to pass through. Preferably, the stopper 2-3 is as follows Figure 1 As shown in the shape, in order to facilitate our assembly, generally the stopper 2-3 and the sealing sleeve 2 are not integrated, but the sealing sleeve 2 is provided with internal threads, and the stopper 2-3 is provided with external threads, and the above two are connected by threads.

[0039] There is a certain gap between the stopper 2-3 and the drill pipe 1, and sealing components 3 are provided in the threaded sections II2-2 on both sides of the stopper 2-3, wherein the sealing component 3 between the end of the drill bit 1-1 and the stopper 2-3 is a sealing component I3-1, and the sealing component I3-1 is sealed and connected with the drill pipe 1 to ensure that oil and gas do not pass through between the sealing component I3-1 and the drill pipe 1, and there is a certain distance between the sealing component I3-1 and the inner surface of the threaded section II2-2 to ensure that oil and gas pass through the gap between the threaded section II2-2 and the sealing component I3-1; the sealing component 3 between the power drill pipe 1-2 and the stopper 2-3 is a sealing component II3-2, and the inner and outer parts of the sealing component II3-2 are respectively sealed and connected with the drill pipe 1 and the inner surface of the threaded section II2-2 to ensure that oil and gas are sealed between the drill bit 1-1 and the stopper 2-3;

[0040] The sealing element I3-1 and the sealing element II3-2 are both a combination of a high-pressure sealing ring and other sealing devices, wherein the high-pressure sealing ring is a rubber ring, and other sealing devices include packing and a pressure cap commonly used in the industry, and the packing and the high-pressure sealing ring are placed in the pressure cap to further ensure the sealing effect;

[0041] The gland 4 is inserted into the drill pipe 1 from the end of the power drill pipe 1-2 and fixedly connected with the threaded section II2-2 through threads, and the seal II3-2 is further fixed between the sealing sleeve 2 and the gland 4; the gland 4 is provided with two threaded holes penetrating the gland 4 on its circumference, and the threaded section II2-2 is provided with corresponding threaded holes, and the gland 4 is further connected with the threaded section II2-2 by screwing the screw 4-1 into the two, further ensuring that the gland 4 will not be ejected. There is a certain gap between the seal II3-2 and the gland 4; therefore, the later pressure will not directly press the gland 4, which plays a buffering role.

[0042] An anti-dropout block 1-3 is provided between the seal II 3-2 and the gland 4. The anti-dropout block 1-3 is fixedly connected to the drill pipe 1 and is stuck inside the gland 4 to prevent the drill pipe 1 from being ejected due to pressure. Furthermore, there is a certain gap between the seal II 3-2 and the anti-dropout block 1-3.

[0043] like Figure 1 As shown, a concave surface is provided on the stopper 2-3 on one side of the sealing member I3-1, and a certain gap is provided between the stopper 2-3 and the drill pipe 1-2. Therefore, after drilling, oil and gas enter the concave surface through the gap between the sealing sleeve 2 and the sealing member I3-1. Due to the flow-guiding effect of the concave surface, the sealing member I3-1 is impacted. Therefore, the pressure-drilling tool generates a back force, so it can adapt to the drilling requirements of high pressure.

[0044] The diameter of the seal Ⅰ3-1 gradually increases from the end of the drill bit 1-1 to the end of the power drill pipe 1-2, so it is used to hold back the pressure;

[0045] Furthermore, two pipe joints are provided on the threaded section II2-2, one of which is connected to the discharge valve 5, and the other is connected to the pressure gauge 6, and the other end of the pipe joint is connected to the interior of the threaded section II2-2.

[0046] Before assembly, first sleeve the seal Ⅰ3-1 on the drill pipe 1, then insert the drill bit 1-1 end of the drill pipe 1 from the end of the threaded section Ⅱ2-2 into the threaded section Ⅱ2-2, then thread the stopper 2-3 with the threaded section Ⅱ2-2, then block the seal Ⅱ3-2 at the right end of the stopper 2-3, then thread the anti-slip block 1-3 with the drill pipe 1, the anti-slip block 1-3 center hole is provided with threads, the drill pipe 1 is provided with threads, and the anti-slip block 1-3 is fixedly connected with the drill pipe 1 through threads; finally, insert the pressure cap 4 from the end of the power drill pipe 1-2 and then connect it with the threaded section Ⅱ2-2 through threads, then screw the two screws 4-1 into the screws 4-1 and the threaded section Ⅱ2-2, at this time, the drill bit 1-1 is not exposed from the threaded section Ⅰ2-1;

[0047] In the process of drilling, the present application welds a high-pressure joint on the surface of the surface sleeve, technical sleeve, oil sleeve, etc. to be drilled, and the sealing sleeve 2 of the device is threadedly connected to the threaded hole on the high-pressure joint, and a cavity is provided in the sealing sleeve 2. Therefore, when the drill rod 1 is manually twisted to drill the surface of the object to be drilled, oil and gas will enter the cavity and be collected, so they will not be scattered near the wellhead to pollute the environment. Since the high-pressure joint is welded to the object with a hole, and the sealing sleeve 2 is threadedly connected to the high-pressure joint, a restrictive effect is generated. Therefore, the pressure after the hole is opened will not bounce the pressure-bearing hole-opening tool, thereby ensuring the safety of personnel.

[0048] After the hole is opened, oil and gas will enter the gap between the drill pipe 1 and the sealing sleeve 2. Due to the sealing effect of the seal Ⅱ3-2, the oil and gas will not enter the gap between the seal Ⅱ3-2 and the pressure cover 4. The pressure cover 4 is threadedly connected to the sealing sleeve 2, and the seal Ⅱ3-2 is restricted between the sealing sleeve 2 and the pressure cover 4. It will not be ejected in any direction to cause personal injury. Since one end of the block 2-3 has a certain curvature, and the sharp corner 2-3-1 of the curvature is aligned with the seal, a concave surface is provided on the block 2-3 on one side of the seal Ⅰ3-1, and a certain gap is provided between the block 2-3 and the drill pipe 1-2. Therefore, after drilling, oil and gas enter the concave surface through the gap between the sealing sleeve 2 and the seal Ⅰ3-1. Due to the guiding effect of the concave surface, it will impact the seal Ⅰ3-1. Therefore, the pressure-bearing hole-opening tool generates a reverse thrust to meet the demand for opening holes with higher pressure; therefore, the pressure-bearing hole-opening tool of the traditional pressure-bearing hole-opening tool has a pressure-bearing hole range of about 10Mpa, and the present application can meet the demand for opening holes of 40-50Mpa. The tool is independently developed by the enterprise and is the pressure-bearing hole-opening tool with the highest pressure range on the market. It has advanced technology and meets the opening needs of most working conditions.

[0049] After the pressure-drilling tool drills a hole, the pressure is displayed by the pressure gauge 6 , and the oil and gas are discharged through the discharge valve 5 .

[0050] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A pressure-type hole-opening tool, characterized in that: It comprises a drill rod, a sealing sleeve penetrated by the drill rod and having a gap between the sealing sleeve and the drill rod, a sealing assembly arranged between the drill rod and the sealing sleeve, and a gland threadedly connected to one end of the sealing sleeve; The tip of the drill rod is a drill bit, and the other end is a power drill rod; The sealing sleeve comprises a threaded section I and a threaded section II whose inner diameter is larger than that of the threaded section I. The sealing sleeve is provided with threads on the outside, and the threaded section I is threadedly connected to the high-pressure joint; a stopper is provided inside the threaded section II to divide the inside of the threaded section II into two parts, and there is a gap between the stopper and the drill pipe, and sealing components are provided inside the threaded section II on both sides of the stopper, wherein the sealing component between the drill bit and the stopper is a sealing component I, and the sealing component I is sealedly connected to the drill pipe, and there is a certain distance between the sealing component I and the inner surface of the threaded section II, and oil and gas pass through the gap between the threaded section II and the sealing component I; the sealing component between the power drill pipe and the stopper is a sealing component II, and the inner and outer parts of the sealing component II are respectively sealedly connected to the drill pipe and the inner surface of the threaded section II so that the oil and gas are sealed between the drill bit and the stopper; The gland is inserted into the drill rod from the end of the power drill rod and is fixedly connected with the threaded section II through threads.

2. A pressure-drilling tool according to claim 1, characterized in that: A square head is arranged at the front end of the power drill rod.

3. A pressure-drilling tool according to claim 1 or 2, characterized in that: A "straight" handle is provided on the drill rod at the end of the power drill rod.

4. The pressure-drilling tool according to claim 1, characterized in that: The sealing sleeve is provided with threads inside, the stopper is provided with threads outside, and the sealing sleeve and the stopper are connected via threads.

5. A pressure-drilling tool according to claim 1 or 4, characterized in that: At least two threaded holes penetrating the gland are arranged on the circumference of the gland, and corresponding threaded holes are arranged on the threaded section II, and the gland and the threaded section II are further connected by screwing screws into the two.

6. The pressure-drilling tool according to claim 5, characterized in that: There is a gap between the sealing member II and the gland.

7. A pressure-drilling tool according to claim 1, 2, 4 or 6, characterized in that: An anti-slip block is provided between the sealing member II and the gland. The anti-slip block is fixedly connected to the drill pipe and is stuck inside the gland. After the connection, there is a gap between the sealing member II and the anti-slip block.

8. The pressure-drilling tool according to claim 7, characterized in that: The center hole of the anti-slip block is provided with threads, the drill rod is provided with threads outside, and the anti-slip block is fixedly connected with the drill rod through threads.

9. The pressure-drilling tool according to claim 8, characterized in that: A concave surface is arranged on the stopper on one side of the sealing member I; and the diameter of the sealing member I gradually increases from the drill bit end to the power drill rod end.

10. The pressure-drilling tool according to claim 9, characterized in that: The threaded section II is provided with two pipe joints, one of which is connected to a discharge valve, and the other is connected to a pressure gauge, and the other end of the pipe joint is connected to the interior of the threaded section II.

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