Oil exploitation drill rod fixing device

Abstract

The invention relates to the technical field of oil exploitation, and discloses an oil exploitation drill rod fixing device which comprises a supporting base, and a first limiting block is fixedly connected to the side wall of the supporting base. In the process of placing a slip, a first sliding block is subjected to extrusion force from the supporting base, and the slip piece and the supporting base slide relatively; after the slip slides along the inclined surface, the horizontal linear distance between the bottom of the first sliding block and the first limiting block is shortened, the first limiting block can just clamp the bottom of the first sliding block, the limiting rod is pushed to slide into the limiting groove after the slip is placed, limiting can be conducted while the slip is installed, and the slip can be taken out through reverse operation after being used. The slip is prevented from being quickly ejected out of a well mouth when the pressure in a well is too large and the slip is subjected to large upward impact force during blowout, the response time is short, the blowout prevention capacity of the slip is improved, and the response time is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of oil extraction equipment, and particularly to a fixing device for an oil extraction drill pipe. Background Art

[0002] With the rapid development of people's lives, oil extraction plays an increasingly important role in life. Drill pipes are indispensable in the process of oil extraction. The drill bits on the drill pipes are used to drill into the ground to facilitate the staff to extract underground oil.

[0003] However, during the use of the device, when the pressure in the oil extraction well suddenly becomes too high or a blowout occurs, the manual slip is instantly subjected to a large upward impact force. Since the manual slip has a weak ability to resist impact and a weak blowout prevention ability, the high-pressure flowing liquid in the well will quickly push the manual slip out of the wellhead, and people have a short response time. In view of the above problems, the following solutions are proposed. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a fixing device for an oil extraction drill pipe, which includes a support base, and a first limiting block is fixedly connected to the side wall of the support base. The device further includes: A fixing mechanism, with an installation space on its side wall; A limiting mechanism, installed on the side wall of the fixing mechanism; Wherein the first limiting block is used to limit the sliding of a first slider in the limiting mechanism; An auxiliary mechanism, installed on the side wall of the fixing mechanism; Wherein the auxiliary mechanism is used to fix the drill tool.

[0005] Preferably, the fixing mechanism includes: A support component, slidably connected to the inner wall of the support base; A clamping component, slidably connected to the side wall of the fixing mechanism through a blocking member; The blocking member includes a plurality of slip tiles slidably connected to the inner wall of the support base.

[0006] Preferably, the limiting mechanism includes: A limiting component, slidably connected to the side wall of the clamping component through a sliding member; The sliding member includes a first chute opened on the side wall of the slip tile; A self-locking component, fixedly connected to the side wall of the clamping component through a fixing member; The fixing member includes two outer shells fixedly connected to the side wall of the slip tile.

[0007] Preferably, the auxiliary mechanism includes: Leak - proof component, the leak - proof component is slidably connected to the side wall of the slip tile through a clamping member; The clamping member includes a number of installation grooves opened at the side wall of the slip tile; a clamping tooth is slidably connected to the side wall of each installation groove.

[0008] Preferably, the support component includes a drill pipe arranged at the side wall of the slip tile, and the side wall of the drill pipe is slidably connected to the side wall of the clamping tooth.

[0009] Preferably, the limiting component includes a first slider slidably connected to one side wall of the chute, a second chute is opened at the side wall of the first slider, and a limiting rod is slidably connected to the side wall of the second chute.

[0010] Preferably, the limiting component further includes a limiting groove opened at the side wall of the slip tile, and the side wall of the limiting rod is slidably connected to the side wall of the limiting groove.

[0011] Preferably, the self - locking component includes a limiting shaft fixedly connected to the inner wall of the housing, a hook is rotatably connected to the side wall of the limiting shaft, and the side wall of each hook is slidably connected to the inner wall of the housing.

[0012] Preferably, the self - locking component further includes a third limiting block rotatably connected to the inner wall of the housing, one end of the third limiting block away from the hook extends outside the housing, and the side wall of the third limiting block is slidably connected to the side wall of the hook.

[0013] The leak - proof component includes a leak - proof groove arranged at the side wall of the clamping tooth, and a diversion groove is opened at the side wall of the clamping tooth.

[0014] Preferably, the leak - proof component further includes a number of diversion plates fixedly connected to the inner wall of the diversion groove, and the diversion plates are all made of high - strength metal materials.

[0015] The present invention has the following beneficial effects: (1) During the placement of the slip, the first slider is subjected to the extrusion force from the support base, and the slip tile and the support base slide relative to each other. After sliding along the inclined plane, the horizontal straight - line distance between the bottom of the first slider and the first limiting block becomes shorter, and the first limiting block can just clamp the bottom of the first slider. After placement, the limiting rod is pushed to slide into the limiting groove, so that the limiting can be carried out while the slip is installed. When taking it out after use, the reverse operation can be carried out, avoiding the situation that when the pressure in the well is too high and a blowout occurs, the slip is quickly pushed out of the wellhead by a large upward impact force. The response time is short, the blowout - proof ability of the slip is improved, and the response time is extended.

[0016] (2) When the present invention places the slip device, the slip pieces will contract. After the slips are fully contracted, the two hooks will press against each other. Under the action of the mutual pressing force, the hooks will rotate around the limit shaft. When rotating, the limit block will slide relative to the hook. When the sliding reaches a certain extent, it will fall downward to lock the hook, achieving self-locking, avoiding loosening of the connection between the slip pieces under the action of impact force, and the possibility that the slips may still have an upward sliding tendency, resulting in insufficient clamping force between the slip pieces and the drill pipe, reducing the static friction force between the two, and being unable to effectively clamp the drill pipe and cause sliding.

[0017] (3) When substances such as mud and gravel in the well impact upward, since the teeth are in a clamped state with the drill pipe, the teeth will be in close contact with the side wall of the drill pipe, initially preventing mud penetration and preventing the gravel from hitting the inner teeth and causing the teeth to wear too fast. The mud and gravel will flow out along the diversion groove to release the pressure of the high-pressure liquid in the well, so that the pressure can be released. The leak-proof groove will further reduce the pressure of the water and mud infiltrating from the gap, reducing the penetration ability of the water and mud, avoiding the impact of gravel and mud on the teeth and greatly reducing the service life of the teeth, and releasing the impact force of the high-pressure liquid to a certain extent.

[0018] (4) After the device of the present invention is used for a long time, the teeth will be severely worn due to various reasons and cannot be used continuously. At this time, the teeth can be pulled out from the installation groove, and then the new teeth can be installed into the installation groove to complete the replacement, thus realizing the rapid replacement of the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a partial cross-sectional structural schematic diagram of the limit component of the present invention; Figure 2 It is a partial structural schematic diagram of the present invention; Figure 3 It is the present invention Figure 1 The enlarged schematic diagram of the structure of A in the present invention; Figure 4 It is the overall structural schematic diagram of the present invention; Figure 5 It is the overall structural schematic diagram of the self-locking component of the present invention; Figure 6 It is the present invention Figure 5 The enlarged schematic diagram of the structure of B in the present invention; Figure 7Schematic diagram of the partial sectional structure of the present invention; Figure 8 Schematic diagram of the partial structure of the auxiliary component of the present invention; Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure of C in; Figure 10 Schematic diagram of the structure of the auxiliary component of the present invention; Figure 11 Schematic diagram of the partial structure of the limiting component of the present invention.

[0021] In the drawings, the list of components represented by each reference numeral is as follows: In the figure: 1, fixing mechanism; 11, supporting component; 12, clamping component; 111, supporting base; 112, first limiting block; 113, drill pipe; 121, chuck tile; 122, rotating shaft; 123, second limiting block; 2, limiting mechanism; 21, limiting component; 22, self-locking component; 211, first chute; 212, first slider; 213, second chute; 214, limiting rod; 215, limiting groove; 221, housing; 222, limiting shaft; 223, hook; 224, third limiting block; 3, auxiliary mechanism; 31, anti-leakage component; 311, installation groove; 312, engaging teeth; 313, anti-leakage groove; 314, diversion groove; 315, diversion plate. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1, please refer to Figure 1 - Figure 3 , the present invention is a fixing device for an oil extraction drill pipe, including a supporting base 111, a first limiting block 112 fixedly connected to the side wall of the supporting base 111, and further including: Fixing mechanism 1, having an installation space at the side wall of the fixing mechanism 1; Limiting mechanism 2, the limiting mechanism 2 is installed on the side wall of the fixing mechanism 1; Wherein the first limiting block 112 is used to limit the sliding of the first slider 212 in the limiting mechanism 2; Auxiliary mechanism 3, the auxiliary mechanism 3 is installed on the side wall of the fixing mechanism 1; Wherein the auxiliary mechanism 3 is used to fix the drilling tool.

[0024] The fixing mechanism 1 includes: The support assembly 11 is slidably connected to the inner wall of the support base 111; The clamping assembly 12 is slidably connected to the side wall of the fixing mechanism 1 through a blocking member; The blocking member includes a plurality of clamping tiles 121 slidably connected to the inner wall of the support base 111.

[0025] The limiting mechanism 2 includes: The limiting assembly 21 is slidably connected to the side wall of the clamping assembly 12 through a sliding member; The sliding member includes a first chute 211 formed in the side wall of the clamping tile 121; The self-locking assembly 22 is fixedly connected to the side wall of the clamping assembly 12 through a fixing member; The fixing member includes two outer shells 221 fixedly connected to the side wall of the clamping tile 121.

[0026] The auxiliary mechanism 3 includes: The leak-proof assembly 31 is slidably connected to the side wall of the clamping tile 121 through a clamping member; The clamping member includes a plurality of mounting grooves 311 formed in the side wall of the clamping tile 121; a clamping tooth 312 is slidably connected to the side wall of each mounting groove 311.

[0027] Example 2, please refer to Figure 3 - Figure 11 In this invention, which is a fixing device for oil extraction drill pipes, on the basis of Example 1, the support assembly 11 includes a drill pipe 113 provided on the side wall of the clamping tile 121, and the side wall of the drill pipe 113 is slidably connected to the side wall of the clamping tooth 312.

[0028] The limiting assembly 21 includes a first slider 212 slidably connected to the side wall of the first chute 211, a second chute 213 is formed in the side wall of the first slider 212, and a limiting rod 214 is slidably connected to the side wall of the second chute 213.

[0029] First, place the slips in the wellbore through the slip gripper. During the placement of the slips, the initial position of the first slider 212 is at the bottom of the first chute 211 under the action of its own gravity. The first slider 212 moves downward as the slip segment 121 moves downward, and just before the first slider 212 contacts the support base 111, the bottom of the first slider 212 can just move below the first limiting block 112. When the first slider 212 starts to contact the support base 111, the first slider 212 is subjected to the extrusion force from the support base 111, and the slip segment 121 and the support base 111 slide relative to each other. The first slider 212 will slide upward along the inner wall of the first chute 211. After sliding along the inclined plane, the horizontal linear distance between the bottom of the first slider 212 and the first limiting block 112 will become shorter, and the first limiting block 112 can just hold the bottom of the first slider 212. After placement, push the limiting rod 214 to slide into the limiting groove 215, so that the slips are automatically limited after installation. When taking it out after use, just operate in the reverse direction, which avoids the situation that when the pressure in the well is too high and a blowout occurs, the slips are quickly ejected out of the wellhead by a large upward impact force. The response time is short, which improves the blowout prevention ability of the slips and prolongs the response time.

[0030] The self-locking assembly 22 further includes a third limiting block 224 rotatably connected to the inner wall of the housing 221. One end of the third limiting block 224 away from the hook 223 extends outside the housing 221, and the side wall of the third limiting block 224 is slidably connected to the side wall of the hook 223. When the pressure in the well is high or a blowout occurs, the drill pipe 113 and the slips are subjected to a large upward impact, and greater friction is required to restrict the movement of the drill pipe. While the slip device is being placed, the slip segments 121 will contract, the distance between the slip segments 121 will gradually shorten, and the friction between the slip segments 121 and the drill pipe 113 will also gradually increase. After the slips are completely contracted, the two hooks 223 will squeeze each other. Under the action of the mutual extrusion force, the hook 223 will rotate around the limiting shaft 222. When rotating, the limiting block 224 will slide relative to the hook 223. When sliding to a certain extent, it will fall downward to hold the hook 223, realizing self-locking, which avoids the loosening of the connection between the slip segments 121 under the action of the impact force, and the possible upward sliding trend of the slips, resulting in insufficient clamping force between the slip segments and the drill pipe, reducing the static friction between the two and making it impossible to effectively clamp the drill pipe and cause it to slide.

[0031] The leak prevention assembly 31 includes a leak prevention groove 313 provided on the side wall of the tooth 312, and a diversion groove 314 is opened on the side wall of the tooth 312.

[0032] The leak prevention assembly 31 further includes a plurality of diversion plates 315 fixedly connected to the inner wall of the diversion groove 314, and the diversion plates 315 are all made of high-strength metal materials.

[0033] When substances such as mud and gravel in the well impact upward, since the clamping teeth 312 and the drill pipe 113 are in a clamped state, the teeth are in close contact with the side wall of the drill pipe 113, which can initially prevent mud penetration and prevent gravel from hitting the internal teeth, resulting in excessive wear of the teeth. The mud and gravel will drain outwards along the diversion groove 314, releasing the pressure on both sides, causing the pressure to concentrate in the middle of the clamping teeth 312. The anti-leakage groove 313 will further impede the decompression of water and mud seeping in from the gap, reducing the penetration ability of water and mud, and avoiding the impact of gravel and mud on the teeth, which greatly reduces the service life of the teeth.

[0034] After the device has been used for a long time, the teeth will be severely worn due to various reasons and can no longer be used. At this time, the clamping teeth 312 can be pulled out from the installation groove 311, and then a new clamping tooth 312 can be installed into the installation groove 311 to complete the replacement, thus realizing the rapid replacement of the clamping teeth.

[0035] A specific application of this embodiment is as follows: First, place the slip in the drilling well through the slip placer. During the placement of the slip, the initial position of the first slider 212 is at the bottom of the first chute 211 under the action of its own gravity. The first slider 212 moves downward as the slip piece 121 moves downward, and just before the first slider 212 contacts the support base 111, the bottom of the first slider 212 can just move below the first limit block 112. When the first slider 212 starts to contact the support base 111, the first slider 212 is subjected to the extrusion force from the support base 111, and the slip piece 121 and the support base 111 slide relative to each other. The first slider 212 will slide upward along the inner wall of the first chute 211. After sliding along the inclined surface, the horizontal straight-line distance between the bottom of the first slider 212 and the first limit block 112 will become shorter, and the first limit block 112 can just hold the bottom of the first slider 212. After placement, push the limit rod 214 to slide into the limit groove 215 to limit the slip while installing it. When taking it out after use, just operate in the reverse direction, which can avoid the slip being quickly ejected from the wellhead when the pressure in the well is too high and during a blowout due to a large upward impact force on the slip, and the response time is short, improving the blowout prevention ability of the slip and extending the response time.

[0036] When the pressure in the well is high or there is a blowout, the drill pipe 113 and the slips are subjected to a large upward impact, and greater frictional force is required to restrict the movement of the drill pipe. When the slip device is placed, the slip pieces 121 will contract, the distance between the slip pieces 121 will gradually shorten, and the frictional force between them and the drill pipe 113 will also gradually increase. After the slips are completely contracted, the two hooks 223 will press against each other. Under the action of the mutual pressing force, the hooks 223 will rotate around the limit shaft 222. When rotating, the limit block 224 will slide relative to the hook 223. When the sliding reaches a certain extent, it will fall downward and catch the hook 223 to achieve self-locking, avoiding the loosening of the connection between the slip pieces 121 under the action of the impact force, and the possible upward sliding tendency of the slips, resulting in insufficient clamping force between the slip pieces and the drill pipe, reducing the static frictional force between the two and making it impossible to effectively clamp the drill pipe and cause sliding.

[0037] When substances such as mud and gravel in the well impact upward, because the clamping teeth 312 and the drill pipe 113 are in a clamped state, the teeth are in close contact with the side wall of the drill pipe 113, which can initially prevent mud penetration and gravel impact on the internal teeth, avoiding excessive wear of the teeth. The mud and gravel will flow out along the diversion groove 314, releasing the pressure of the high-pressure liquid in the well, so that the pressure can be released. The leak-proof groove 313 will further impede the decompression of water and mud infiltrating from the gap, reducing the penetration ability of water and mud, avoiding the impact of gravel and mud on the teeth, greatly reducing the service life of the teeth, and releasing the impact force of the high-pressure liquid to a certain extent.

[0038] After the device has been used for a long time, the teeth will be severely worn due to various reasons and cannot be used continuously. At this time, the clamping teeth 312 can be pulled out from the installation groove 311, and then the new clamping teeth 312 can be installed into the installation groove 311 to complete the replacement, thus realizing the rapid replacement of the clamping teeth.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An oil extraction drill pipe fixing device, including a support base (111), a first limiting block (112) is fixedly connected to the side wall of the support base (111), and it is characterized in that, Further included are: A fixing mechanism (1), having an installation space at the side wall of the fixing mechanism (1); A limiting mechanism (2), installed at the side wall of the fixing mechanism (1); Wherein the first limiting block (112) is used to limit the sliding of the first slider (212) in the limiting mechanism (2); An auxiliary mechanism (3), installed at the side wall of the fixing mechanism (1); Wherein the auxiliary mechanism (3) is used to fix the drill tool.

2. The fixed device for an oil extraction drill pipe according to claim 1, wherein: The fixing mechanism (1) includes: A support assembly (11), slidably connected to the inner wall of the support base (111); A clamping assembly (12), slidably connected to the side wall of the fixing mechanism (1) through a blocking member; The blocking member includes a plurality of clamping tiles (121) slidably connected to the inner wall of the support base (111).

3. The oil extraction drill pipe fixing device according to claim 2, characterized in that: The limiting mechanism (2) includes: A limiting assembly (21), slidably connected to the side wall of the clamping assembly (12) through a sliding member; The sliding member includes a first chute (211) opened at the side wall of the clamping tile (121); A self-locking assembly (22), fixedly connected to the side wall of the clamping assembly (12) through a fixing member; The fixing member includes two outer shells (221) fixedly connected to the side wall of the clamping tile (121).

4. The fixed device for an oil exploration drill pipe according to claim 3, characterized in that: The auxiliary mechanism (3) includes: A leak-proof assembly (31), slidably connected to the side wall of the clamping tile (121) through a clamping member; The clamping member includes a plurality of installation grooves (311) opened at the side wall of the clamping tile (121); a clamping tooth (312) is slidably connected to the side wall of each installation groove (311).

5. The fixed device for an oil extraction drill pipe according to claim 4, characterized in that: The support assembly (11) includes a drill pipe (113) disposed at the side wall of the clamping tile (121), and the side wall of the drill pipe (113) is slidably connected to the side wall of the clamping tooth (312).

6. The fixed device for an oil extraction drill pipe according to claim 5, characterized in that: The limiting assembly (21) includes a first slider (212) slidably connected to the side wall of the first chute (211), a second chute (213) is opened at the side wall of the first slider (212), and a limiting rod (214) is slidably connected to the side wall of the second chute (213).

7. The fixing device for oil extraction drill pipes according to claim 6, characterized in that: The limiting assembly (21) further includes a limiting groove (215) opened at the side wall of the clamping tile (121), and the side wall of the limiting rod (214) is slidably connected to the side wall of the limiting groove (215).

8. The fixed device for oil extraction drill pipes according to claim 7, characterized in that: The self-locking assembly (22) further includes a third limiting block (224) rotatably connected to the inner wall of the outer shell (221), one end of the third limiting block (224) away from the hook (223) extends outside the outer shell (221), and the side wall of the third limiting block (224) is slidably connected to the side wall of the hook (223).

9. The fixing device for an oil extraction drill pipe according to claim 8, wherein: The leak-proof assembly (31) includes a leak-proof groove (313) disposed at the side wall of the clamping tooth (312), and a diversion groove (314) is opened at the side wall of the clamping tooth (312).

10. The fixed device for an oil exploration drill pipe according to claim 9, characterized in that: The leak-proof component (31) further includes a plurality of flow guiding plates (315) fixedly connected to the inner wall of the flow guiding groove (314), and the flow guiding plates (315) are all made of high-strength metal material.

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