A collision-proof oil drill pipe joint

Abstract

The present invention discloses an anti-collision oil drill pipe joint, which relates to the technical field of oil drilling operations. It comprises a first connecting tube, the first connecting tube is slidably connected with a male joint, the first connecting tube is fixedly connected with two connecting rings, the two connecting rings are commonly fixedly connected with a second connecting tube, the second connecting tube is provided with a rotating part, a female joint is slidably connected inside the rotating part, the first connecting tube is fixedly connected with a fixed block distributed in a circular array, the second connecting tube is fixedly connected with an oil storage part distributed in a circular array, and the oil storage part is slidably connected with a first piston rod. The present invention adopts a method of dividing the existing joint into two sections, and connecting the two sections of the joint in an active connection manner, so that when the drill pipe and the "two-section joint" move in a curved oil well, the "two-section joint" can swing to adapt to the curvature of the curved oil well, that is, to maintain the sealing between the joint and the drill pipe, and to be able to move adaptively in the curved oil well.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling operations, in particular to an anti-collision oil drill pipe joint. Background Art

[0002] The oil drill pipe joint is the core component of oil drilling equipment. It is mainly used to connect two sections of drill pipe to ensure that the drill pipe can smoothly transmit power in deep well drilling operations, withstand huge tensile and compressive loads and maintain the circulation of drilling fluid. In the process of oil drilling, the drill pipe will inevitably move in the curved oil well. When the drill pipe and the joint move to the curved part of the oil well, the drill pipe and the joint will be affected by the curved oil well, causing the connection parts of the two to be repeatedly stretched, compressed, and bent. Alternating stress causes fatigue damage. When the connection parts of the drill pipe and the joint are damaged, the sealing of the two will be reduced, and the drilling fluid flowing through the drill pipe and the joint will leak into the oil well, causing the pressure in the oil well to change, resulting in safety accidents, thereby threatening the operators and the environment. Summary of the invention

[0003] In order to solve the problems mentioned in the above background technology, the present invention provides an anti-collision oil drill pipe joint.

[0004] The technical solution of the present invention is: an anti-collision oil drill pipe joint, comprising a first connecting cylinder, a male joint that is threadedly matched with the adjacent side of the first connecting rod is slidably connected in the first connecting cylinder, a spring is arranged between the male joint and the first connecting cylinder, two connecting rings are fixedly connected to the side of the first connecting cylinder away from the first connecting rod, a second connecting cylinder is commonly fixedly connected to the side of the two connecting rings away from the first connecting cylinder, a rotating part is arranged in the second connecting cylinder, a female joint that is threadedly matched with the second connecting rod is slidably connected in the rotating part, a tension spring is arranged between the female joint and the rotating part, A fixed block distributed in a ring array is fixedly connected to a side of the first connecting tube close to the second connecting tube, and an oil storage piece distributed in a ring array is fixedly connected to a side of the second connecting tube facing the first connecting tube. The oil storage piece is slidably connected to a first piston rod, and a side of the first piston rod away from the adjacent oil storage piece is ball-connected to the adjacent fixed block. The oil storage piece is provided with springs that are mirror-distributed and squeeze-fit with the adjacent first piston rods. A pressure-reducing component for buffering the internal pressure is provided in the first connecting tube, and protection components for protecting the first connecting tube and the second connecting tube are provided.

[0005] Furthermore, hydraulic oil is stored in the oil storage component, and a side of the first piston rod located adjacent to the oil storage component is provided with flow holes distributed in a ring array, and the hydraulic oil in the oil storage component flows through the adjacent flow holes distributed in a ring array.

[0006] Furthermore, the pressure relief assembly includes a first gas storage member distributed in a ring array, the first gas storage members distributed in the ring array are all fixedly connected to a side of the first connecting tube close to the second connecting tube, gas is stored in the two connecting rings, gas is stored in the first gas storage member, a sliding plate is slidably connected in the first gas storage member, and a spring is provided in the first gas storage member to cooperate with the adjacent sliding plate.

[0007] Furthermore, the cross-section of the connecting ring is a fold-shaped one, and the connecting ring close to the center of the first connecting tube is fixedly connected with airbags distributed in a linear array, and the airbags are located between the angles of adjacent folds on the connecting ring, and the first gas storage member is provided with a gas delivery component for delivering gas to the airbags distributed in the linear array.

[0008] Furthermore, the gas transmission assembly includes a second gas storage member, which is fixedly connected to the adjacent first gas storage member, and gas is stored in the second gas storage member. The spring in the first gas storage member is located between the adjacent sliding plate and the adjacent second gas storage member. The second gas storage member is slidably connected with a second piston rod fixed to the adjacent sliding plate. The side of the second gas storage member away from the adjacent sliding plate is connected to a plurality of connecting tubes, the number of the plurality of connecting tubes is consistent with the number of the airbags distributed in the linear array, and the plurality of connecting tubes respectively penetrate the adjacent connecting rings and are connected to the adjacent airbags.

[0009] Furthermore, the two protection components each include elastic connecting frames that are arranged in a straight line and in a circular array, the facing sides of a group of adjacent straight lines and in a circular array of the elastic connecting frames are fixed to the outer side of the first connecting tube, the facing sides of another group of adjacent straight lines and in a circular array of the elastic connecting frames are fixed to the second connecting tube, the back sides of the adjacent straight lines and in a circular array of the elastic connecting frames are rotatably connected to a fixed seat, and the back sides of each group of adjacent straight lines and in a circular array of the fixed seats are commonly fixed with a protective cover, and the protective cover is provided with a buffer component for buffering the first connecting tube and the second connecting tube.

[0010] Furthermore, the diameters of the two protective covers are both larger than the diameters of the first connecting tube and the second connecting tube, and the two protective covers are used to protect the first connecting tube and the second connecting tube respectively.

[0011] Furthermore, the buffer assembly includes a fixing ring, which is fixed to the inner side of the adjacent protective cover. The fixing ring is slidably connected to sliding members distributed in an annular array, and a spring is provided between the sliding member and the adjacent fixing ring.

[0012] Furthermore, it also includes a limiting assembly, which is used to limit the first connecting rod and the second connecting rod, and the limiting assembly is arranged on the first connecting cylinder. The limiting assembly includes a Z-shaped frame distributed in an annular array, and the Z-shaped frames distributed in an annular array are all slidably connected to the side of the first connecting cylinder close to the male joint, and the Z-shaped frames distributed in an annular array are all extruded and matched with the male joint. A spring is arranged between the Z-shaped frame and the first connecting cylinder, and the side of the first connecting cylinder close to the male joint is slidably connected to the first elastic pin distributed in an annular array, and the first elastic pin is extruded and matched with the adjacent Z-shaped frame, and the first connecting rod is provided with a spring distributed in an annular array. The first elastic pin is arranged with a limiting groove for limiting the position, the rotating part is rotatably matched with the second connecting tube, the rotating part is slidably connected to the limiting part on the side away from the first connecting tube, a spring is arranged between the limiting part and the rotating part, the female joint is in contact and matched with the limiting part, the rotating part is slidably connected with the second elastic pins distributed in an annular array on the side away from the first connecting tube, the second connecting rod is provided with a limiting groove for limiting the position of the second elastic pins distributed in the annular array, the back sides of the second elastic pins distributed in the annular array are all squeezed and matched with the limiting part, and a stress buffer component is arranged in the second connecting tube, and the stress buffer component is used to drive the rotating part to actively rotate.

[0013] Furthermore, the stress buffer assembly includes connecting plates distributed in a circular array, the connecting plates distributed in the circular array are all fixedly connected in the second connecting tube, straight and mirror-distributed springs are arranged between the connecting plates and the rotating member, the back sides of the second elastic pins distributed in the circular array are all fixedly connected with limiting pins, and the side of the second connecting tube away from the first connecting tube is provided with limiting holes distributed in a circular array, and the limiting pins are limitedly matched with the adjacent limiting holes.

[0014] The present invention has the following advantages: the present invention adopts a method of dividing the existing joint into two sections, and connects the two sections of the joint in an active connection mode, so that when the drill pipe and the "two sections of the joint" move in a curved oil well, the "two sections of the joint" can swing to adapt to the curvature of the curved oil well, that is, the sealing between the joint and the drill pipe is maintained, and the joint can move adaptively in the curved oil well;

[0015] When the first connecting tube and its accessory parts move in the curved part of the oil well, the first piston rod slides along the adjacent oil storage part, so as to buffer the swing of the first connecting tube, so that when the first connecting tube and the first connecting rod slide in the curved part of the oil well, the drilling fluid flowing through the first connecting rod will not experience pressure fluctuations, so as to achieve a stable supply of drilling fluid;

[0016] When the first connecting tube moves in the oil well, the contact between the two protective covers and the curved part in the oil well replaces the contact between the first connecting tube and the second connecting tube and the curved part in the oil well, thereby protecting the first connecting tube and the second connecting tube. The contact between the sliding member and the adjacent spring buffers the fixing ring and the adjacent protective covers, thereby preventing the protective covers from colliding with the curved part in the oil well and transmitting the collision force to the first connecting tube, thereby causing a change in the pressure in the first connecting tube.

[0017] In order to prevent the problem of loosening of the connection parts of the two sections of drill pipe and the existing joint when high torque occurs during oil well drilling after the two sections of drill pipe are connected to the existing joint, the present invention adopts a self-locking method for the two sections of drill pipe, so that after the two sections of drill pipe are connected to the existing joint, the drill pipe and the joint will not rotate relative to each other, and by releasing the lock of the rotating part and the second connecting tube, when high torque occurs during oil well drilling, the second connecting rod can drive the female joint and the rotating part to rotate along the second connecting tube, giving the second connecting rod space to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a front cross-sectional view of the three-dimensional structure of the present invention;

[0020] Figure 3 It is a three-dimensional structural cross-sectional view of the first connecting tube of the present invention;

[0021] Figure 4 It is a three-dimensional structural exploded view of the connecting ring, the second connecting cylinder and the rotating member of the present invention;

[0022] Figure 5 It is a three-dimensional structural cross-sectional view of the second connecting tube of the present invention;

[0023] Figure 6 It is a three-dimensional structural cross-sectional view of the connecting ring of the present invention;

[0024] Figure 7 is a three-dimensional structural cross-sectional view of the first gas storage component of the present invention;

[0025] Figure 8 It is a three-dimensional structural cross-sectional view of the protective cover of the present invention;

[0026] Fig. 9 It is a three-dimensional structural cross-sectional view of the fixing ring of the present invention;

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the second connecting cylinder and the rotating member of the present invention;

[0028] Fig.11 A bottom view of the three-dimensional structure of the rotating member of the present invention;

[0029] Fig.12 It is a three-dimensional structural cross-sectional view of the rotating part of the present invention.

[0030] Names and serial numbers of parts in the figure: 10-first connecting cylinder, 101-male connector, 11-connecting ring, 12-second connecting cylinder, 121-rotating member, 122-female connector, 13-fixed block, 14-oil storage member, 15-first piston rod, 151-circulation hole, 20-first air storage member, 21-sliding plate, 1-first connecting rod, 2-second connecting rod, 3-air bag, 40-second air storage member, 41-second piston rod, 42-connecting pipe, 50-elastic connecting frame, 51-fixed seat, 52-protective cover, 60-fixing ring, 61-sliding member, 70-Z-shaped frame, 71-first elastic pin, 72-limiting member, 73-second elastic pin, 80-connecting plate, 81-limiting pin, 82-limiting hole. DETAILED DESCRIPTION

[0031] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, side, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0032] In order to solve the problem that the movement of the drill pipe and the joint in the curved part of the oil well will cause the two to be subjected to repeated stretching, compression, and bending alternating stresses, thereby reducing the sealing between the drill pipe and the joint, the present invention adopts a method of dividing the existing joint into two sections, and connecting the two sections of the joint in an active connection manner, so that when the drill pipe and the "two-section joint" move in the curved oil well, the "two-section joint" can swing, thereby adapting to the curvature of the curved oil well, that is, maintaining the sealing between the joint and the drill pipe, and being able to move adaptively in the curved oil well.

[0033] Example 1: A collision-proof oil drill pipe joint, see Figure 1-Figure 6As shown, it includes a first connecting tube 10, and a male connector 101 is slidably connected to the upper side of the first connecting tube 10. The upper side of the male connector 101 is threadedly matched with the lower side of the first connecting rod 1. A spring is arranged between the male connector 101 and the first connecting tube 10. The spring is used to apply an extrusion force to the male connector 101. Two connecting rings 11 are fixedly connected to the lower side of the first connecting tube 10. The diameter of the connecting ring 11 on the side close to the center of the first connecting tube 10 is smaller than the diameter of the connecting ring 11 on the outer peripheral side of the first connecting tube 10. The lower sides of the two connecting rings 11 are commonly fixedly connected to a second connecting tube 12 A rotating member 121 is provided in the second connecting cylinder 12, and a female joint 122 is limitedly slidably connected in the rotating member 121. The lower side of the female joint 122 is threadedly matched with the upper side of the second connecting rod 2. A tension spring is provided between the female joint 122 and the rotating member 121, and the spring is used to provide an extrusion force to the female joint 122. A fixing block 13 distributed in an annular array is fixedly connected to the lower side of the first connecting cylinder 10, and an oil storage member 14 distributed in an annular array is fixedly connected to the upper side of the second connecting cylinder 12. The first piston rod 15 is sealed and slidably connected in the oil storage member 14. The upper side of the first piston rod 15 is ball-jointed with the adjacent fixed block 13, and the oil storage part 14 is provided with springs which are mirror-distributed up and down and are squeezed and matched with the adjacent first piston rod 15. A pressure relief assembly is provided in the first connecting cylinder 10, and the pressure relief assembly is used to buffer the pressure in the first connecting cylinder 10. The first connecting cylinder 10 and the second connecting cylinder 12 are both provided with protection assemblies for protecting the two. The protection assembly replaces the contact between the first connecting cylinder 10 and the second connecting cylinder 12 and the oil well, so as to protect the first connecting cylinder 10 and the second connecting cylinder 12.

[0034] Please refer to Figure 6 and Figure 7 Hydraulic oil is stored in the oil storage part 14, and a circulation hole 151 distributed in a ring array is provided on one side of the first piston rod 15 located in the adjacent oil storage part 14. The hydraulic oil in the oil storage part 14 flows through the adjacent circulation holes 151 distributed in a ring array, thereby achieving buffering for the first piston rod 15.

[0035] Please refer to Figure 6 and Figure 7 The pressure relief assembly includes a first gas storage member 20 distributed in a circular array, and the first gas storage members 20 distributed in a circular array are all fixedly connected to the lower side of the first connecting tube 10. Gas is stored in the two connecting rings 11, and gas is stored in the first gas storage member 20. A sliding plate 21 is sealingly and slidably connected in the first gas storage member 20. A spring that cooperates with the adjacent sliding plate 21 is arranged in the first gas storage member 20. When the pressure in the first connecting rod 1 and the second connecting rod 2 increases, the sliding plate 21 slides in a direction away from the first connecting rod 1 and the second connecting rod 2, thereby increasing the volume in the first connecting rod 1 and the second connecting rod 2 to adapt to the increase in pressure in the first connecting rod 1 and the second connecting rod 2.

[0036] Please refer to Figure 5-Figure 7 The cross-section of the connecting ring 11 is a folded shape. The connecting ring 11 near the center side of the first connecting tube 10 is fixedly connected with three air bags 3 distributed in a linear array. The air bags 3 are located between the angles of adjacent folds on the connecting ring 11. The angles of adjacent folds on the connecting ring 11 are covered by the air bags 3, so that the drilling fluid flowing through the first connecting tube 10 and the second connecting tube 12 can remain stable. A gas delivery component for delivering gas to the air bags 3 distributed in the linear array is provided in the first gas storage part 20. When the first connecting tube 10 and its accessory parts stay in the curved part in the oil well and encounter the situation of increased pressure in the first connecting rod 1 and the second connecting rod 2, the gas delivery component delivers gas to the air bags 3 to expand the air bags 3 to fill the angles of adjacent folds of the connecting ring 11, so as to avoid the drilling fluid in the first connecting rod 1 and the second connecting rod 2 from contacting with the sharp parts of the adjacent folds of the connecting ring 11 when passing through them, thereby generating an impact, causing the connecting ring 11 to vibrate, thereby affecting the connection between the connecting ring 11 and the second connecting tube 12.

[0037] Please refer to Figure 6 and Figure 7 The gas delivery assembly includes a second gas storage member 40 fixedly connected to the adjacent first gas storage member 20, gas is stored in the second gas storage member 40, the spring in the first gas storage member 20 is located between the adjacent sliding plate 21 and the adjacent second gas storage member 40, a second piston rod 41 is sealingly and slidingly connected in the second gas storage member 40, the second piston rod 41 is fixedly connected to the adjacent sliding plate 21 on one side thereof, and three connecting tubes 42 are connected to the side of the second gas storage member 40 away from the adjacent sliding plate 21, the three connecting tubes 42 respectively penetrate the adjacent connecting rings 11 and are connected to the adjacent airbags 3, and the three connecting tubes 42 are used to transport gas to the adjacent airbags 3.

[0038] Please refer to Figure 2 , Figure 8 and Fig. 9The two protection components each include elastic connecting frames 50 arranged in a vertical straight line and in a circular array. The facing sides of the elastic connecting frames 50 arranged in a circular array on the upper side are fixed to the outer side of the first connecting tube 10. The facing sides of the elastic connecting frames 50 arranged in a circular array on the lower side are fixed to the second connecting tube 12. The back sides of the elastic connecting frames 50 arranged in a circular array on the adjacent vertical straight lines are rotatably connected to the fixing seats 51. The back sides of each group of the fixing seats 51 arranged in a circular array on the adjacent vertical straight lines are fixed to the outer side of the first connecting tube 10. A protective cover 52 is fixedly connected to the side together, and the diameters of the two protective covers 52 are larger than the diameters of the first connecting cylinder 10 and the second connecting cylinder 12. The two protective covers 52 are respectively used to protect the first connecting cylinder 10 and the second connecting cylinder 12. The contact between the two protective covers 52 and the oil well replaces the contact between the first connecting cylinder 10 and the second connecting cylinder 12 and the oil well, thereby realizing the anti-collision of the first connecting cylinder 10 and the second connecting cylinder 12. The protective cover 52 is provided with a buffer component for buffering the first connecting cylinder 10 and the second connecting cylinder 12.

[0039] Please refer to Figure 2 , Figure 8 and Fig. 9 The buffer assembly includes a fixed ring 60 fixed to the inner side of the adjacent protective cover 52. The fixed ring 60 is limitedly slidably connected to sliding members 61 distributed in a ring array. A spring is arranged between the sliding member 61 and the adjacent fixed ring 60, and the spring is used to drive the adjacent sliding member 61 to reset and slide.

[0040] When it is necessary to use this device to connect two drill pipes, the operator puts the male connector 101 on the first connecting tube 10 into the adjacent side of the first connecting rod 1, and then rotates the first connecting tube 10 and its accessories to connect the male connector 101 to the first connecting rod 1. During the rotation of the first connecting tube 10 and its accessories, the first connecting tube 10 approaches the adjacent side of the first connecting rod 1 and fits with it.

[0041] After the first connecting tube 10 is close to one side of the first connecting rod 1 and fits therewith, the operator continues to rotate the first connecting tube 10 and its accessory parts to move the male connector 101 upward along the first connecting tube 10 and squeeze the adjacent spring. When the male connector 101 moves to the extreme position, the threaded connection between the male connector 101 and the first connecting rod 1 is completed. At this time, the extrusion force applied by the adjacent spring of the male connector 101 strengthens the fit between the male connector 101 and the first connecting rod 1.

[0042] After completing the connection between the male connector 101 and the first connecting rod 1, the operator connects the second connecting rod 2 and the female connector 122. During the connection between the second connecting rod 2 and the female connector 122, the second connecting rod 2 rotates and gradually approaches the second connecting tube 12. When the second connecting tube 12 and the adjacent side of the female connector 122 are fitted, the second connecting rod 2 continues to rotate so that the female connector 122 moves along the rotating member 121 and stretches the adjacent tension spring. When the female connector 122 moves to the extreme position, the threaded connection between the female connector 122 and the second connecting rod 2 is completed. At this time, the tension applied by the adjacent tension spring of the female connector 122 strengthens the fit between the female connector 122 and the second connecting rod 2.

[0043] When the device moves with the drill pipe in the curved part of the oil well, the first connecting rod 1 drives the male joint 101, the first connecting tube 10 and all the fixed blocks 13 to swing along the adjacent oil storage parts 14. At this time, the two connecting rings 11 contract near the inner side of the curved part in the oil well, and the two connecting rings 11 expand near the outer side of the curved part in the oil well, so that the fixed blocks 13 near the inner side of the curved part in the oil well squeeze the adjacent first piston rods 15, so that the adjacent first piston rods 15 slide downward along the adjacent oil storage parts 14 and squeeze the adjacent springs. The fixed blocks 13 near the outer side of the curved part in the oil well pull the adjacent first piston rods 15, so that the adjacent first piston rods 15 slide upward along the adjacent oil storage parts 14 and squeeze the adjacent springs. During the sliding process of the first piston rods 15 The hydraulic oil in the adjacent oil storage member 14 flows through the adjacent flow holes 151 distributed in a circular array, providing a buffer for the swing of the first connecting tube 10, so that when the first connecting tube 10 and the first connecting rod 1 slide in the curved part of the oil well, the drilling fluid flowing through the first connecting rod 1 will not experience pressure fluctuations, thereby achieving a smooth supply of drilling fluid. Through the above process, when the first connecting rod 1 or the second connecting rod 2 moves in the curved part of the oil well, the first connecting tube 10 and the second connecting tube 12 gradually form a V shape, thereby solving the problem of reduced sealing between the drill pipe and the joint when the existing drill pipe and the joint move in the curved part of the oil well. After the drill pipe passes through the curved part of the oil well in the device, the above parts can be moved in the opposite direction to reset.

[0044] In the process of the first connecting rod 1, the second connecting rod 2, the first connecting tube 10 and their accessory parts moving in the curved part of the oil well, in order to prevent the first connecting tube 10 and the second connecting tube 12 from colliding with the curved part of the oil well (this article only takes the collision of the first connecting tube 10 and the second connecting tube 12 with the curved part of the oil well as an example, not limited thereto), thereby causing the connection between the first connecting tube 10 and the second connecting tube 12 and the first connecting rod 1 and the second connecting rod 2 to loosen so that the sealing is reduced, for this purpose, the contact between the first connecting tube 10 and the second connecting tube 12 and the curved part of the oil well is replaced by the contact between the two protective covers 52 and the curved part of the oil well, thereby protecting the first connecting tube 10 and the second connecting tube 12.

[0045] When any one of the two protective covers 52 collides with the curved part in the oil well, taking the first connecting tube 10 and one of the protective covers 52 as an example, the protective cover 52 collides with the curved part in the oil well and moves toward the center of the adjacent first connecting tube 10. At this time, the protective cover 52 and the first connecting tube 10 are offset, and the protective cover 52 squeezes the two elastic connecting frames 50 distributed in the adjacent linear array close to the first connecting tube 10, so that the telescopic parts of the two elastic connecting frames 50 distributed in the adjacent linear array are contracted inward, and then the protective cover 52 squeezes the two elastic connecting frames 50 distributed in the adjacent linear array away from the first connecting tube 10, so that the telescopic parts of the two elastic connecting frames 50 distributed in the adjacent linear array are extended outward.

[0046] After the protective cover 52 collides with the curved part in the oil well, it deviates from the first connecting tube 10, so that the protective cover 52 squeezes the adjacent sliding member 61. During the movement of the sliding member 61, the adjacent spring is squeezed. Through the contact between the sliding member 61 and the adjacent spring, the fixing ring 60 and the adjacent protective cover 52 are buffered to prevent the protective cover 52 from transmitting the collision force to the first connecting tube 10 after colliding with the curved part in the oil well, thereby causing a change in the pressure in the first connecting tube 10.

[0047] After the protective cover 52 is separated from the curved part in the oil well, the four elastic connecting frames 50 which are linear and mirror-distributed drive the protective cover 52 to reset, so that the center of the protective cover 52 coincides with the center of the first connecting tube 10 .

[0048] When the pressure in the first connecting rod 1 and the second connecting rod 2 increases, taking the movement process of one of the sliding plates 21 and its attached parts as an example, the sliding plate 21 moves toward the direction of the adjacent fixed block 13 and squeezes the adjacent spring. During the movement of the sliding plate 21, the volume in the first connecting rod 1 and the second connecting rod 2 is increased to adapt to the increase in the pressure in the first connecting rod 1 and the second connecting rod 2. During the movement of the sliding plate 21, the gas in the adjacent first gas storage member 20 is squeezed into the two connecting rings 11, creating a pressure environment for the connection between the first connecting tube 10 and the second connecting tube 12, avoiding excessive pressure in the first connecting rod 1 and the second connecting tube 2, so as to affect the pressure in the two connecting rings 11 (when the pressure in the first connecting rod 1 and the second connecting rod 2 exceeds the pressure in the two connecting rings 11, the connecting ring 11 in the two connecting rings 11 close to the center of the first connecting tube 10 will be affected by the pressure and And expand outward, thereby causing the connection ring 11 near the center side of the first connecting tube 10 to be over-fatigued. To solve the above problem, a method of balancing the pressure inside the first connecting rod 1 and the second connecting rod 2 is adopted to solve the problem that the connection ring 11 expands after being affected by the pressure and causes excessive fatigue of the workpiece), and by balancing the pressure inside the first connecting rod 1 and the second connecting rod 2, it is prevented that the mechanical stress of the first connecting rod 1 and the second connecting rod 2 is increased after the pressure inside the first connecting rod 1 and the second connecting rod 2 is increased (when the first connecting rod 1 and the second connecting rod 2 and the male connector 101 and the female connector 122 are in a high-pressure environment, the stress will be concentrated at the connection between the first connecting rod 1 and the second connecting rod 2 and the male connector 101 and the female connector 122, and fatigue cracks are prone to occur), resulting in stress concentration at the connection between the first connecting rod 1 and the second connecting rod 2 and the male connector 101 and the female connector 122, so as to affect the structural integrity of the drill pipe.

[0049] When the first connecting tube 10 and its accessory parts stay at the curved part in the oil well and encounter the situation of increased pressure in the first connecting rod 1 and the second connecting rod 2, the sliding plate 21 drives the adjacent second piston rod 41 to move and squeezes the gas in the adjacent second piston rod 41 into the three air bags 3 through the three adjacent connecting tubes 42, so that the air bags 3 expand to fill the angles of the adjacent folds of the connecting ring 11, avoiding the drilling fluid in the first connecting rod 1 and the second connecting rod 2 from contacting the sharp parts of the adjacent folds of the connecting ring 11 when passing through them, thereby generating an impact, causing the connecting ring 11 to vibrate, thereby affecting the connection between the connecting ring 11 and the second connecting tube 12.

[0050] After the pressure in the first connecting rod 1 and the second connecting rod 2 no longer increases, the sliding plate 21 drives the adjacent second piston rod 41 to slide back to its original position under the action of the adjacent spring, so that the gas in the three airbags 3 enters the adjacent second air storage member 40 through the adjacent three connecting tubes 42, thereby shrinking the airbags 3.

[0051] In the first embodiment, the connection relationship between the second connecting tube 12 and the rotating member 121 is fixed connection, but in the second embodiment, the connection relationship between the second connecting tube 12 and the rotating member 121 is limited rotation.

[0052] In order to prevent the problem that after the two sections of drill pipe are connected to the existing joint, the connection parts of the two sections of drill pipe and the existing joint will become loose when high torque occurs during oil well drilling, the present invention adopts a self-locking method for the two sections of drill pipe, so that after the two sections of drill pipe are connected to the existing joint, the drill pipe and the joint will not rotate relative to each other.

[0053] Example 2: Based on Example 1, please refer to Figure 3 , Figure 5 and Fig.12 , also includes a limiting assembly for limiting the first connecting rod 1 and the second connecting rod 2, the limiting assembly includes a Z-shaped frame 70 distributed in an annular array, the Z-shaped frames 70 distributed in an annular array are all slidably connected to the upper side of the first connecting cylinder 10, the Z-shaped frames 70 distributed in an annular array are all squeezed and matched with the lower side of the male joint 101, the opposite sides of the upper sides of the Z-shaped frames 70 distributed in an annular array are provided with inclined surfaces, a spring is provided between the Z-shaped frame 70 and the first connecting cylinder 10, the upper side of the first connecting cylinder 10 is slidingly connected with a first elastic pin 71 distributed in an annular array, the back sides of the first elastic pins 71 distributed in an annular array are respectively squeezed and matched with the adjacent Z-shaped frames 70, the back sides of the first elastic pins 71 distributed in an annular array are provided with inclined surfaces, the inclined surfaces on the first elastic pins 71 are squeezed and matched with the inclined surfaces on the adjacent Z-shaped frames 70, a limiting groove is provided on the lower side of the first connecting rod 1, and the limiting groove on the lower side of the first connecting rod 1 is squeezed and matched with the adjacent The locking cam 76 is provided with a spring 76 which is arranged on the locking cam 76 to lock the engagement of the locking cam 76 with the spring 76 which is arranged on the locking cam 76. The locking cam 76 is provided with a spring 76 which is arranged on the locking cam 76 to lock the engagement of the locking cam 76.

[0054] Please refer to Figure 10-12The stress buffer assembly includes a connecting plate 80 fixedly connected to the second connecting cylinder 12 and distributed in an annular array, a rotating member 121 rotatably cooperates with the second connecting cylinder 12, a vertical straight spring and a left-right mirror distribution is arranged between the connecting plate 80 and the rotating member 121, and the back side of the second elastic pin 73 distributed in an annular array is fixedly connected to the limiting pin 81, and the side of the second connecting cylinder 12 away from the first connecting cylinder 10 is provided with a limiting hole 82 distributed in an annular array, and the limiting pin 81 is limitedly cooperated with the adjacent limiting hole 82. When the limiting pin 81 is no longer in contact with the adjacent limiting hole 82, the rotation limit of the rotating member 121 and the second connecting cylinder 12 is released, so that the rotating member 121 can rotate freely.

[0055] During the process of connecting the male connector 101 and the first connecting rod 1, the male connector 101 squeezes the Z-shaped frame 70 distributed in the annular array when it moves toward the side close to the first connecting rod 1, and the Z-shaped frame 70 distributed in the annular array then squeezes the first elastic pins 71 distributed in the annular array respectively, so that the first elastic pins 71 distributed in the annular array move toward each other. When the threaded connection between the male connector 101 and the first connecting rod 1 is completed, the opposite sides of the first elastic pins 71 distributed in the annular array have been inserted into the adjacent limiting grooves on the first connecting rod 1. Through the cooperation between the first elastic pins 71 distributed in the annular array and the adjacent limiting grooves on the first connecting rod 1, the rotation of the first connecting rod 1 is limited to avoid the problem of loosening of the first connecting rod 1 and the male connector 101 due to the influence of high torque conditions.

[0056] During the process of connecting the female connector 122 and the second connecting rod 2, the female connector 122 moves toward the side close to the second connecting rod 2 and squeezes the limit piece 72, and the limit piece 72 then squeezes the adjacent spring. During the movement of the limit piece 72, the second elastic pin 73 distributed in the annular array is squeezed, so that the second elastic pin 73 distributed in the annular array and the limit pin 81 move toward each other. During the movement of the limit pin 81 distributed in the annular array, they gradually break away from the limit of the adjacent limit hole 82. When the threaded connection between the female connector 122 and the second connecting rod 2 is completed, the second elastic pin 73 distributed in the annular array has been inserted into the adjacent limit groove on the second connecting rod 2. Through the cooperation between the second elastic pin 73 distributed in the annular array and the adjacent limit groove on the second connecting rod 2, the rotation of the second connecting rod 2 is limited to avoid the problem of loosening of the second connecting rod 2 and the female connector 122 due to the influence of high torque.

[0057] After the second elastic pins 73 distributed in an annular array are inserted into the adjacent limiting grooves on the second connecting rod 2, the limiting pins 81 distributed in an annular array have been separated from the adjacent limiting holes 82, thereby releasing the limiting of the rotating member 121, allowing the rotating member 121 to rotate freely along the second connecting tube 12.

[0058] When high torque occurs during oil well drilling, the second connecting rod 2 drives the female connector 122 and the rotating member 121 and its accessories to rotate along the second connecting tube 12. The rotating member 121 squeezes the adjacent spring during rotation, and the locking of the rotating member 121 and the second connecting tube 12 is released. When high torque occurs during oil well drilling, the second connecting rod 2 can drive the female connector 122 and the rotating member 121 to rotate along the second connecting tube 12, thereby providing space for the second connecting rod 2 to rotate and preventing the high torque from affecting the connection between the second connecting rod 2 and the female connector 122.

[0059] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A collision-proof oil drill pipe joint, characterized in that: The invention comprises a first connecting tube (10), wherein a male connector (101) is slidably connected to the first connecting tube (10) and is threadedly engaged with a side adjacent to a first connecting rod (1), a spring is arranged between the male connector (101) and the first connecting tube (10), two connecting rings (11) are fixedly connected to the side of the first connecting tube (10) away from the first connecting rod (1), and a second connecting tube (12) is commonly fixedly connected to the side of the two connecting rings (11) away from the first connecting tube (10), a rotating member (121) is arranged in the second connecting tube (12), a female connector (122) is slidably connected to the rotating member (121) and is threadedly engaged with a second connecting rod (2), a tension spring is arranged between the female connector (122) and the rotating member (121), and the first A fixing block (13) distributed in an annular array is fixedly connected to one side of the connecting tube (10) close to the second connecting tube (12); an oil storage member (14) distributed in an annular array is fixedly connected to one side of the second connecting tube (12) facing the first connecting tube (10); the oil storage member (14) is slidably connected to a first piston rod (15); a side of the first piston rod (15) away from the adjacent oil storage member (14) is ball-connected to the adjacent fixing block (13); a spring which is distributed in a mirror image and is pressed and matched with the adjacent first piston rod (15) is arranged in the oil storage member (14); a pressure-relief component for buffering the pressure inside the first connecting tube (10) is arranged in the first connecting tube (10); and a protection component for protecting the first connecting tube (10) and the second connecting tube (12) is arranged on both the first connecting tube (10) and the second connecting tube (12); The pressure relief assembly comprises first gas storage members (20) distributed in an annular array, the first gas storage members (20) distributed in an annular array are all fixedly connected to a side of the first connecting tube (10) close to the second connecting tube (12), gas is stored in the two connecting rings (11), gas is stored in the first gas storage member (20), a sliding plate (21) is slidably connected in the first gas storage member (20), and a spring cooperating with an adjacent sliding plate (21) is arranged in the first gas storage member (20).

2. The anti-collision oil drill pipe joint according to claim 1, characterized in that: Hydraulic oil is stored in the oil storage member (14), and a side of the first piston rod (15) located adjacent to the oil storage member (14) is provided with flow holes (151) distributed in an annular array, and the hydraulic oil in the oil storage member (14) flows through the adjacent flow holes (151) distributed in an annular array.

3. The anti-collision oil drill pipe joint according to claim 1, characterized in that: The cross section of the connecting ring (11) is a folded shape, and the connecting ring (11) close to the center of the first connecting tube (10) is fixedly connected with air bags (3) distributed in a linear array, and the air bags (3) are located between the included angles of adjacent folds on the connecting ring (11), and the first gas storage member (20) is provided with a gas delivery component for delivering gas to the air bags (3) distributed in the linear array.

4. The anti-collision oil drill pipe joint according to claim 3, characterized in that: The gas delivery assembly comprises a second gas storage member (40), the second gas storage member (40) being fixedly connected to the adjacent first gas storage member (20), gas being stored in the second gas storage member (40), a spring in the first gas storage member (20) being located between the adjacent sliding plate (21) and the adjacent second gas storage member (40), a second piston rod (41) fixedly connected to the adjacent sliding plate (21) being slidably connected in the second gas storage member (40), a side of the second gas storage member (40) away from the adjacent sliding plate (21) being connected to a plurality of connecting tubes (42), the number of the plurality of connecting tubes (42) being the same as the number of the air bags (3) distributed in the linear array, the plurality of connecting tubes (42) respectively passing through the adjacent connecting rings (11) and being connected to the adjacent air bags (3).

5. The anti-collision oil drill pipe joint according to claim 3, characterized in that: The two protection components each comprise elastic connecting frames (50) arranged in a straight line and in an annular array, the facing sides of a group of adjacent straight lines and in an annular array of the elastic connecting frames (50) are fixedly connected to the outside of the first connecting tube (10), the facing sides of another group of adjacent straight lines and in an annular array of the elastic connecting frames (50) are fixedly connected to the second connecting tube (12), the back sides of the adjacent straight lines and in annular array of the elastic connecting frames (50) are rotatably connected to a fixing seat (51), and the back sides of each group of adjacent straight lines and in annular array of the fixing seats (51) are fixedly connected to a protective cover (52), and the protective cover (52) is provided with a buffer component for buffering the first connecting tube (10) and the second connecting tube (12).

6. The anti-collision oil drill pipe joint according to claim 5, characterized in that: The diameters of the two protective covers (52) are both larger than the diameters of the first connecting tube (10) and the second connecting tube (12); the two protective covers (52) are used to protect the first connecting tube (10) and the second connecting tube (12), respectively.

7. The anti-collision oil drill pipe joint according to claim 6, characterized in that: The buffer assembly comprises a fixing ring (60), the fixing ring (60) being fixedly connected to the inner side of an adjacent protective cover (52), the fixing ring (60) being slidably connected to sliding members (61) distributed in an annular array, and a spring being arranged between the sliding member (61) and the adjacent fixing ring (60).

8. The anti-collision oil drill pipe joint according to claim 7, characterized in that: The invention also comprises a limiting assembly, wherein the limiting assembly is used to limit the first connecting rod (1) and the second connecting rod (2), the limiting assembly being arranged on the first connecting tube (10), the limiting assembly comprising Z-shaped frames (70) distributed in an annular array, the Z-shaped frames (70) distributed in an annular array being slidably connected to a side of the first connecting tube (10) close to the male joint (101), the Z-shaped frames (70) distributed in an annular array being pressed and matched with the male joint (101), a spring being arranged between the Z-shaped frame (70) and the first connecting tube (10), the side of the first connecting tube (10) close to the male joint (101) being slidably connected to first elastic pins (71) distributed in an annular array being pressed and matched with adjacent Z-shaped frames (70), the first connecting rod (1) being provided with a spring which is pressed and matched with the first elastic pins (71) distributed in an annular array The rotating member (121) is rotatably matched with the second connecting tube (12); the side of the rotating member (121) away from the first connecting tube (10) is slidably connected to the limiting member (72); a spring is provided between the limiting member (72) and the rotating member (121); the female connector (122) is in contact with the limiting member (72); the side of the rotating member (121) away from the first connecting tube (10) is slidably connected to the second elastic pins (73) distributed in an annular array; the second connecting rod (2) is provided with a limiting groove for limiting cooperation with the second elastic pins (73) distributed in an annular array; the back sides of the second elastic pins (73) distributed in an annular array are all pressed and matched with the limiting member (72); a stress buffer component is provided in the second connecting tube (12); the stress buffer component is used to drive the rotating member (121) to rotate actively.

9. The anti-collision oil drill pipe joint according to claim 8, characterized in that: The stress buffer assembly comprises connecting plates (80) distributed in an annular array, the connecting plates (80) distributed in an annular array are all fixedly connected to the second connecting tube (12), a straight spring distributed in a mirror image is arranged between the connecting plates (80) and the rotating member (121), the back sides of the second elastic pins (73) distributed in an annular array are all fixedly connected to limiting pins (81), and the side of the second connecting tube (12) away from the first connecting tube (10) is provided with limiting holes (82) distributed in an annular array, and the limiting pins (81) are limitedly matched with adjacent limiting holes (82).

Images