Pressure relief connector for connecting mushroom head and drill rod
By designing a pressure relief joint at the connection between the mushroom head and the drill pipe, and using a sleeve structure and a sealing mechanism to control the water flow direction, the difficulties in connecting the drill pipe and the problem of water spraying during the construction of water-bearing formations were solved, improving construction safety and efficiency, and extending the service life of the one-way valve.
Patent Information
- Application Number
- CN202520803743.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-25
AI Technical Summary
Existing mushroom-shaped drilling rigs cannot effectively relieve pressure during drilling operations in water-bearing formations, leading to difficulties in connecting drill pipes. Water pressure affects the safety and health of workers, making it difficult to carry out normal operations, especially under harsh conditions.
Design a pressure relief connector, which includes a sleeve structure, two through holes and a drain pipe, and has an internal sealing mechanism to control the water flow direction according to the water pressure. When the pressure is low, the water is discharged through the first through hole, and when the pressure is high, the water is discharged into the drain pipe through the second through hole and a one-way valve, thereby reducing water spraying.
It achieves stable drainage under different water pressure conditions, avoids water spraying affecting construction, improves operational safety and construction efficiency, and extends the service life of the one-way valve.
Smart Images
Figure CN223894101U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to geological drilling equipment technical field, specifically, relate to a kind of pressure relief joint for connecting mushroom head and drill rod. BACKGROUND
[0002] In geological drilling and oil and gas geological survey well drilling construction, sometimes need to be lifted or put down several tons even dozens of tons of drill rod from well, so that drilling machine, drilling tower need to control the lifting and lowering of drill rod by lifting system.Drilling tower lifting system includes tower, crown block, travelling block and hoisting device etc.In actual work, mushroom head is often used to connect hoisting device and drill rod of lifting system, and the lifting system lifts or puts down the drill rod, thereby reducing labor intensity, increasing drilling construction efficiency and safety.
[0003] Some existing mushroom heads have good use effect in conventional stratum drilling construction, but can cause many problems in gushing stratum construction.When gushing stratum drilling construction, well gushing water will flow from the inside of drill rod to mushroom head under the action of water pressure, and then be discharged through the drain hole on mushroom head.But the existing mushroom head only has a small size center hole, which cannot achieve pressure relief effect, so that the mushroom head connected drill rod is affected by water pressure and is pushed upward, it is difficult to align and tighten the thread of drill rod tool, so that it is difficult to connect drill rod tool;A large amount of underground water gushing from well is pushed upward through the center hole of existing mushroom head, and falls and sprinkles on operating personnel, so that operating personnel can only work in the rain, especially at night or in high-altitude cold area, cold temperature and poor conditions, which threatens the health of operating personnel, and continues to work under severe test, even stop work. UTILITY MODEL CONTENTS
[0004] The utility model aims at overcoming the insufficient of prior art, provide a kind of pressure relief joint for connecting mushroom head and drill rod.
[0005] The utility model aims at overcoming the insufficient of prior art, provide a kind of pressure relief joint for connecting mushroom head and drill rod.
[0006] A kind of pressure relief joint for connecting mushroom head and drill rod, the pressure relief joint is sleeve structure, its top end is detachably connected with mushroom head, its bottom end is detachably connected with the drill rod as hollow structure;The first through hole and the second through hole are spaced apart and provided on the outer periphery side of the above-mentioned pressure relief joint, the first through hole is close to the bottom end of itself and is arranged, the second through hole is close to the top end of itself and is arranged, the second through hole is connected with drain pipe, one-way valve is arranged in the above-mentioned drain pipe;The above-mentioned pressure relief joint is also provided with the plugging mechanism that water is discharged from the first through hole or the second through hole according to the size of water pressure in itself inside.
[0007] Further, in the utility model, the inner side wall of the pressure relief joint is provided with lower limit block and upper limit block at intervals, the sealing structure includes sealing disc and arc sealing plate, the sealing disc is in sliding sealing connection with the pressure relief joint, the arc sealing plate is provided on the bottom of the sealing disc, the sealing disc is located between the lower limit block and the upper limit block, the arc sealing plate is provided with third through hole and fourth through hole at intervals, the third through hole is in communication with the first through hole when the sealing disc is in abutment with the lower limit block, the fourth through hole is in communication with the second through hole when the sealing disc is in abutement with the upper limit block.
[0008] Further, in the utility model, the inner side wall of the pressure relief joint is provided with lower limit block and upper limit block at intervals, the sealing structure includes sealing disc and arc sealing plate, the sealing disc is in sliding sealing connection with the pressure relief joint, the arc sealing plate is provided on the bottom of the sealing disc, the sealing disc is located between the lower limit block and the upper limit block, the arc sealing plate is provided with third through hole and fourth through hole at intervals, the third through hole is in communication with the first through hole when the sealing disc is in abutment with the lower limit block, the fourth through hole is in communication with the second through hole when the sealing disc is in abutement with the upper limit block.
[0009] Further, in the utility model, the outer periphery of the sealing disc is provided with at least one sliding block, the inner side wall of the pressure relief joint is provided with sliding groove matched with the sliding block, the sliding block is in sliding connection with the sliding groove, and the extension direction of the sliding groove is parallel with the central axis of the pressure relief joint.
[0010] The utility model discloses beneficial effects are:
[0011] The utility model provides a kind of pressure relief joint for connecting mushroom head and drill rod, by designing two through holes and drain pipe on pressure relief joint, while installing plugging mechanism in pressure relief joint, which can control the outflow direction of water according to the size of water pressure in borehole, when the water pressure in borehole is smaller, the water in borehole only is discharged through first through hole;When the water pressure in borehole is larger, the water in borehole is discharged in turn through second through hole and check valve into drain pipe, two discharge modes will not appear a large amount of water spray phenomenon on drill rod, so as not to affect normal construction of construction personnel;While the water pressure in borehole is low, check valve does not work, only when water pressure is higher, check valve works, so as to reduce the use time of check valve, and then improve its life cycle. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 For the connection structure schematic view of mushroom head, pressure relief joint and drill rod of the utility model embodiment;
[0013] Figure 2 For the structure schematic view of the position where sealing disc is located when the water pressure in pressure relief joint is less than the elastic force of elastic member;
[0014] Figure 3 The structure diagram of the position of the sealing disc when the water pressure in the pressure relief joint is greater than the elastic force of the elastic member;
[0015] Figure 4 The connecting structure diagram of the sealing disc and the arc-shaped sealing plate of the utility model embodiment.
[0016] In the figure: 101-pressure relief joint; 201-mushroom head; 301-drill rod; 401-first through hole; 402-second through hole; 403-drain pipe; 404-one-way valve; 501-mounting plate; 502-elastic member; 503-lower limit block; 504-upper limit block; 505-sealing disc; 506-arc-shaped sealing plate; 507-third through hole; 508-fourth through hole; 601-sliding block; 602-sliding slot. DETAILED DESCRIPTION
[0017] The technical scheme of the utility model will be described clearly and completely below in combination with embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0018] Please refer to Figures 1-4 The utility model provides a technical scheme:
[0019] A pressure relief joint for connecting a mushroom head and a drill rod, the pressure relief joint 101 is a sleeve structure, when in use, the top end thereof is threadedly connected with the mushroom head 201, and the bottom end thereof is threadedly connected with the drill rod 301 which is a hollow structure. After the mushroom head 201, the pressure relief joint 101 and the drill rod 301 are connected, the mushroom head 201 is connected with the elevator of the lifting system.
[0020] Specifically, from Figure 2Or 3, the outer periphery of the pressure relief joint 101 is provided with a first through hole 401 and a second through hole 402, the first through hole 401 and the second through hole 402 are arranged one above the other along the central axis of the pressure relief joint 101, the first through hole 401 is provided at the bottom end of the pressure relief joint 101, and the second through hole 402 is provided close to the top end of the pressure relief joint 101. In order to allow water to be discharged from the second through hole 402, a drain pipe 403 is installed on the outer periphery of the pressure relief joint 101, the drain pipe 403 communicates with the second through hole 402, and a one-way valve 404 is installed in the drain pipe 403, the water in the pressure relief joint 101 can be sequentially discharged into the drain pipe 403 through the second through hole 402 and the one-way valve 404, and the water in the drain pipe 403 cannot flow into the second through hole 402 through the one-way valve 404. In other embodiments of the present embodiment, the one-way valve 404 is not installed in the drain pipe 403, and a valve is directly installed on the drain pipe 403, which can be opened and closed as needed.
[0021] In actual use, the water pressure and water volume in the well may not be the same: some holes drilled have less water, and some have more; some holes have less water pressure, and some have more. When the water volume in the borehole is small, or the water pressure is small, it cannot flow into the drain pipe 403 due to the resistance of the one-way valve 404, and it can flow out through the first through hole 401. In this case, since the water pressure in the pressure relief joint 101 is small, there will be no problem of too long jet distance when it flows out through the first through hole 401, so as not to affect the construction personnel. However, when the water pressure in the borehole is large, if the water in the pressure relief joint 101 is discharged through the first through hole 401, a large amount of water will be sprayed, affecting the normal construction of the ground construction personnel. Therefore, the inventor proposes an idea when designing: when the water pressure in the borehole is small, the water in the borehole is discharged only through the first through hole 401; when the water pressure in the borehole is large, the water in the borehole is not discharged through the first through hole 401, but is sequentially discharged into the drain pipe 403 through the second through hole 402 and the one-way valve 404, so that a large amount of water will not be sprayed. In order to realize the above idea, the pressure relief joint 101 is also provided with a plugging mechanism that can discharge water from the first through hole 401 or the second through hole 402 according to the water pressure in the pressure relief joint 101.
[0022] Specifically, from Figure 2Or 3 view, the sealing mechanism in this embodiment includes a mounting plate 501 mounted in the pressure relief joint 101, a number of springs mounted on the bottom of the mounting plate 501, a sealing disc 505 connected with the springs, and an arc-shaped sealing plate 506 mounted on one side of the bottom of the sealing disc 505. The outer periphery of the sealing disc 505 and the outer side wall of the arc-shaped sealing plate 506 abut against the inner side wall of the pressure relief joint 101, so that the sealing disc 505 and the arc-shaped sealing plate 506 can only slide up and down in the pressure relief joint 101, and the water in the pressure relief joint 101 cannot enter between the outer periphery of the sealing disc 505 and the inner side wall of the pressure relief joint 101, nor between the outer side wall of the arc-shaped sealing plate 506 and the inner side wall of the pressure relief joint 101. At the same time, the arc-shaped sealing plate 506 is provided with a third through hole 507 and a fourth through hole 508 at intervals from top to bottom. In order to limit the sliding stroke of the sealing disc 505 in the pressure relief joint 101, a lower limit block 503 and an upper limit block 504 are specially mounted on the inner side wall of the pressure relief joint 101 at intervals from top to bottom, and the sealing disc 505 can only slide between the lower limit block 503 and the upper limit block 504. When the bottom wall of the sealing disc 505 abuts against the top wall of the lower limit block 503, the third through hole 507 is in communication with the first through hole 401, and the fourth through hole 508 is not in communication with the second through hole 402. When the top wall of the sealing disc 505 abuts against the bottom wall of the upper limit block 504, the fourth through hole 508 is in communication with the second through hole 402, and the third through hole 507 is not in communication with the first through hole 401. The number of springs is selected according to actual conditions to ensure that the spring force is within a suitable range.
[0023] From Figure 2 Or 3 view, when the water pressure in the borehole (the water pressure below the sealing disc 505) is less than the spring force of the springs, the water pressure in the borehole at this time cannot overcome the spring force, so as to push the sealing disc 505 upward, and the arc-shaped sealing plate 506 blocks the second through hole 402, so that the low-pressure water in the borehole can only be discharged outward through the third through hole 507 and the first through hole 401, and will not affect the normal construction of the construction personnel. When the water pressure in the borehole (the water pressure below the sealing disc 505) is greater than the spring force of the springs, the water pressure in the borehole at this time can overcome the spring force, so as to push the sealing disc 505 upward until the sealing disc 505 abuts against the upper limit block 504. After the sealing disc 505 abuts against the upper limit block 504, the fourth through hole 508 is in communication with the second through hole 402, and the arc-shaped sealing plate 506 blocks the first through hole 401, and then the water in the borehole overcomes the resistance of the one-way valve 404 and is discharged into the drain pipe 403, so that a large amount of water spray will not occur at the joint.
[0024] The above design can solve the problem as proposed by the inventor. Meanwhile, the above structure has another advantage: when the water pressure in the drill hole is low, the one-way valve 404 does not work, and only when the water pressure is high, the one-way valve 404 works, thereby reducing the service time of the one-way valve 404, and further improving the service life thereof.
[0025] When the sealing disc 505 slides between the lower limit block 503 and the upper limit block 504, in order to prevent the sealing disc 505 from rotating around the central axis of the pressure relief joint 101, thereby affecting the normal work of the springs, two sliding blocks 601 are arranged on the outer circumferential side of the sealing disc 505 in the embodiment, the inner side wall of the pressure relief joint 101 is provided with sliding grooves 602 matched with the two sliding blocks 601, the two sliding blocks 601 are respectively connected with the two sliding grooves 602 in a sliding mode, and the extension direction of any sliding groove 602 is parallel to the central axis of the pressure relief joint 101, so that the sealing disc 505 cannot rotate during the movement. Meanwhile, the springs can be provided with telescopic rods, so that the springs do not bend during the extension and contraction.
[0026] The above description is only the preferred embodiment of the present application, and it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein by the above teaching or related technical or knowledge. Any modification and change made by the person skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.
Claims
1. A pressure relief connector (101) for connecting a mushroom head (201) and a drill rod (301), the pressure relief connector (101) being a sleeve structure, the top end of which is detachably connected to the mushroom head (201), and the bottom end of which is detachably connected to the hollow drill rod (301); characterized in that: The pressure relief connector (101) is provided with a first through hole (401) and a second through hole (402) spaced apart on its outer periphery. The first through hole (401) is located near its bottom end, and the second through hole (402) is located near its top end. The second through hole (402) is connected to a drain pipe (403), and a one-way valve (404) is provided inside the drain pipe (403). The pressure relief connector (101) is also provided with a sealing mechanism that allows water to be discharged from the first through hole (401) or the second through hole (402) according to the internal water pressure.
2. A pressure relief connector (101) for connecting a mushroom head (201) and a drill rod (301) according to claim 1, characterized in that: The sealing mechanism includes a mounting plate (501) disposed within the pressure relief connector (101), an elastic element (502) disposed on the mounting plate (501), and a sealing structure connected to the elastic element (502). The sealing structure is slidably sealed to the inner wall of the pressure relief connector (101). The extension and retraction direction of the elastic element (502) is parallel to the central axis of the pressure relief connector (101). When the water pressure in the pressure relief connector (101) is less than the elastic force of the elastic element (502), the sealing structure blocks the second through hole (402). When the water pressure in the pressure relief connector (101) is greater than the elastic force of the elastic element (502), the sealing structure blocks the first through hole (401).
3. A pressure relief connector (101) for connecting a mushroom head (201) and a drill rod (301) according to claim 2, characterized in that: The inner wall of the pressure relief connector (101) is provided with a lower limit block (503) and an upper limit block (504) at intervals; the sealing structure includes a sealing disc (505) that is slidably and sealingly connected to the pressure relief connector (101) and an arc-shaped sealing plate (506) disposed at the bottom of the sealing disc (505), the sealing disc (505) being located between the lower limit block (503) and the upper limit block (504); the arc-shaped sealing plate (506) is provided with a third through hole (507) and a fourth through hole (508) at intervals, when the sealing disc (505) abuts against the lower limit block (503), the third through hole (507) communicates with the first through hole (401), when the sealing disc (505) abuts against the upper limit block (504), the fourth through hole (508) communicates with the second through hole (402).
4. A pressure relief connector (101) for connecting a mushroom head (201) and a drill rod (301) according to claim 3, characterized in that: At least one slider (601) is provided on the outer periphery of the sealing disc (505), and a groove (602) adapted to the slider (601) is provided on the inner sidewall of the pressure relief joint (101). The slider (601) is slidably connected to the groove (602), and the extension direction of the groove (602) is parallel to the central axis of the pressure relief joint (101).