Drill rod with torsion resistance function

Abstract

The invention relates to the technical field of drill rods, in particular to a drill rod with an anti-torsion function, torsion generated by rotation acts on a sliding sleeve, a first protruding part and a second protruding part, the structural strength of the sliding sleeve, the first protruding part and the second protruding part is far larger than that of a threaded part, the damage phenomenon is avoided, and the service life of the drill rod is prolonged. The problem that the thread part is damaged due to the fact that torsion acts on the thread part is avoided, the problem that the stability of a well drilling structure is low is avoided, meanwhile, the sliding sleeve used for resisting torsion is also used for covering the connecting position of the adjacent drill rods, the pressure relief phenomenon is avoided, and the service life is prolonged. Therefore, the problem that the silt cannot be brought out to a wellhead due to pressure drop of the drilling fluid is avoided; a drill rod with an anti-torsion function comprises a sliding sleeve and a spring. The upper end of the drill rod is hermetically and slidably connected with a sliding sleeve; a plurality of springs are fixedly connected to the sliding sleeve and fixedly connected with the drill rod. A plurality of first protruding parts are arranged at the upper end of the drill rod. A plurality of second protrusions are arranged at the lower end of the drill rod.

Description

Technical Field

[0001] The present invention relates to the technical field of drill rods, and more particularly to a drill rod with an anti-torsion function. Background Art

[0002] During the drilling construction process, the torque generated by the driving assembly on the ground needs to be transmitted to the drill bit in the deep well through the drill pipe, and then the drill bit is driven to rotate by the torque to realize the drilling operation; however, due to the relatively deep depth of the well, multiple drill pipes need to be spliced ​​together to enable the drill bit to penetrate into the bottom of the well for drilling operations. Conventional drill pipe splicing methods include threaded connection and joint connection. When threaded connection is adopted, threads are set at both ends of the drill pipe, and then two adjacent drill pipes are screwed together. However, the adjacent drill pipes transmit torque through threads, and long-term use will cause damage to the threads and reduce the structural stability. When joint connection is adopted, the two drill pipes are separately Insert both ends of the joint, then penetrate two circles of pins in the joint, and insert the pins into the corresponding drill pipe. This method can transmit torque through the pins, and the structural stability is strong. However, when splicing drill pipes in this way, multiple pins need to be manually inserted into the joint and the drill pipe in turn, which is inefficient. Moreover, after drilling is completed, the mud and sand generated by drilling will get stuck in the pin holes, interfering with the pin removal operation, further reducing efficiency. Moreover, after the pins are inserted and fixed, it is difficult to ensure that the tightening force of each pin in the circumferential range is the same, resulting in different torques on each pin during the drilling process, which leads to different service lives of the pins, which is not conducive to the replacement and scrap management of the pins. Summary of the invention

[0003] In order to overcome the disadvantages that the existing drill rods spliced ​​together by threads have low torque resistance and that the difficulty of installing and disassembling the drill rods is greatly increased when the drill rods are connected together by joints, the present invention provides a drill rod with anti-torsion function.

[0004] The technical solution is: a drill rod with anti-torsion function, including a drill rod; a channel is opened on the drill rod; a threaded part is arranged at the upper end and the lower end of the drill rod; it also includes a sliding sleeve and a spring; the upper end of the drill rod is sealed and slidably connected with the sliding sleeve; a plurality of springs are fixedly connected to the sliding sleeve, and the springs are fixedly connected to the drill rod; a plurality of raised parts 1 are arranged on the upper end of the drill rod; a plurality of raised parts 2 are arranged on the lower end of the drill rod, and the raised parts 2 are aligned with the corresponding raised parts 1; a plurality of grooves 1 are opened on the sliding sleeve, and the grooves 1 are located outside the corresponding raised parts 1.

[0005] Furthermore, a sealing ring is included; the sealing ring is detachably connected to the lower end of the drill rod.

[0006] Furthermore, the sliding sleeve is provided with a plurality of grooves 2.

[0007] Furthermore, the opening of the second groove faces downward.

[0008] Furthermore, the top of the second groove is rounded.

[0009] Furthermore, the threaded portion is in a truncated cone shape.

[0010] Furthermore, bevel angles are provided at locations where the outer diameter of the drill rod changes.

[0011] Furthermore, the drill rod is made of rust-proof material.

[0012] Furthermore, the drill rod is clamped with the sealing ring.

[0013] Furthermore, a sealing ring is provided at the lower end of the drill rod.

[0014] The present invention has the following advantages: 1. The torque generated by the rotation acts on the sliding sleeve, the first protrusion and the second protrusion, and the threaded part does not need to provide anti-torsion effect, thereby avoiding damage to the threaded part, and the structural stability is strong. The threaded part can replace the pin in the "joint connection" to fix the two adjacent drill pipes, avoiding many problems caused by the setting of pins. At the same time, the sliding sleeve used for anti-torsion is also used to cover the connection between adjacent drill pipes to avoid pressure relief, thereby avoiding the problem of being unable to bring mud and sand out to the wellhead due to the decrease in drilling fluid pressure; Second, by providing groove 2 on the sleeve, the drilling fluid that returns upward drives the sleeve to move upward, so as to enhance the sealing effect of the sleeve on the connection between adjacent drill pipes, further avoid pressure relief, and ensure that the drilling fluid has sufficient pressure to discharge mud and sand from the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a drill rod with an anti-torsion function according to the present invention is shown; Figure 2 A cross-sectional view of a drill rod with an anti-torsion function according to the present invention is shown; Figure 3 A schematic diagram of the structure of the spring of the present invention is shown; Figure 4 The present invention is shown Figure 3 The enlarged view of point A in the middle; Figure 5 An exploded view of a drill rod with an anti-torsion function according to the present invention is shown; Figure 6 A schematic diagram of the drilling fluid flow state is shown.

[0016] Figure numbers: 1-drill rod, 2-sleeve, 3-spring, 4-sealing ring, 91-channel, 92-threaded portion, 93-protrusion one, 94-protrusion two, 95-groove one, 96-groove two. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: A drill rod with torsion resistance, such as Figure 1-Figure 6 As shown, it includes a drill rod 1; a channel 91 is provided in the middle of the drill rod 1; a threaded portion 92 is provided at the upper and lower ends of the drill rod 1; it also includes a sleeve 2 and a spring 3; the upper end of the drill rod 1 is sealed and slidably connected with the sleeve 2, and the sleeve 2 is set to an alloy material; six springs 3 are fixed to the sleeve 2, and the springs 3 are fixed to the drill rod 1, and the springs 3 are set to an alloy material; six protrusions 93 are provided at the upper end of the drill rod 1; six protrusions 94 are provided at the lower end of the drill rod 1, and the protrusions 94 are aligned with the corresponding protrusions 93; six grooves 95 are provided on the sleeve 2, and the grooves 95 are located on the outer side of the corresponding protrusions 93. When the upper drill rod 1 drives the lower drill rod 1 to rotate, the protrusions 94 on the upper drill rod 1 apply torque to the sleeve 2 on the lower drill rod 1, and then the torque is applied to the protrusions 93 of the lower drill rod 1 through the sleeve 2.

[0019] First, install the drill bit at the lower end of the drill rod 1, then push the sleeve 2 downward, the sleeve 2 compresses the spring 3 until the upper end of the sleeve 2 is flush with the upper end of the drill rod 1, and then screw the lower end of another drill rod 1 into the upper end of this drill rod 1, as shown in the figure. Figure 3 As shown, at this time, the two drill rods 1 are fixed together by matching the threaded portions 92 on the two drill rods 1. When tightened to the limit position, the protrusion 1 93 on the lower drill rod 1 is just aligned with the protrusion 2 94 on the upper drill rod 1. Then the force applied to the sleeve 2 is stopped, so that the spring 3 rebounds and drives the sleeve 2 to move upward, so that the upper part of the sleeve 2 slides onto the upper drill rod 1, and the upper part of the groove 1 95 is sleeved on the outer side of the protrusion 2 94 of the upper drill rod 1, completing the splicing operation of the two adjacent drill rods 1.

[0020] When drilling, the lower part of the spliced ​​drill pipe 1 is inserted into the well, and the upper part of the spliced ​​drill pipe 1 is fixed to an external power mechanism located on the ground. The spliced ​​drill pipe 1 is then driven by the power mechanism on the ground to rotate and move downward, and the spliced ​​drill pipe 1 drives the drill bit to rotate and move downward, so that the drilling operation is performed through the drill bit. In this process, the external pump is connected to the uppermost channel 91. After the adjacent drill pipes 1 are spliced, the channels 91 inside are connected to each other, and the drilling fluid is transported to the channel 91 by the external pump. The drilling fluid flows into the drill bit through the channel 91, and then is sprayed from the drill bit to the drilling position to cool the drill bit. After the drilling fluid is sprayed from the drill bit, it will flow back upward along the gap between the outer side of the drill pipe 1 and the well wall, and finally flow upward from the wellhead to the ground, and bring out the mud and sand generated by the drilling, completing the drilling operation. The flow direction of the drilling fluid in this process is as follows Figure 6 shown.

[0021] When the drill rod 1 rotates, the upper drill rod 1 drives the sleeve 2 to rotate through the protrusion 2 94 thereon, and the sleeve 2 drives the lower drill rod 1 to rotate through the cooperation of the protrusion 1 93 and the groove 1 95. In this process, the torque generated by the rotation acts on the sleeve 2, the protrusion 1 93 and the protrusion 2 94. At this time, the threaded portion 92 does not need to provide anti-torsion effect, thereby avoiding damage to the threaded portion 92, and the structure has strong stability. In addition, the threaded portion 92 can replace the pin in the "joint connection" to fix the two adjacent drill rods 1, avoiding many problems caused by setting the pin.

[0022] The drilling fluid needs sufficient impact force to flush out the mud and sand in the well. When adjacent drill pipes 1 are screwed together through the threaded portion 92, some drilling fluid will flow out from the gap of the threaded portion 92, resulting in pressure relief. If the drilling depth is relatively deep, the number of drill pipes 1 that need to be spliced ​​is relatively large, resulting in too many pressure relief positions, which in turn leads to insufficient pressure of the drilling fluid that impacts the drilling position, and the mud and sand generated by drilling cannot be brought out to the wellhead, thereby interfering with the drilling operation. Therefore, when the upper part of the sleeve 2 slides to the outside of the lower end of the upper drill pipe 1, the sleeve 2 can be used to cover the connection between the adjacent drill pipes 1 to avoid pressure relief, thereby avoiding the problem of being unable to bring mud and sand out to the wellhead due to the decrease in drilling fluid pressure.

[0023] When in use, the torque generated by the rotation acts on the sleeve 2, the protrusion 1 93 and the protrusion 2 94. The threaded portion 92 does not need to provide anti-torsion effect, thereby avoiding damage to the threaded portion 92. The structure has strong stability, and the threaded portion 92 can replace the pin in the "joint connection" to fix the two adjacent drill pipes 1, avoiding many problems caused by the setting of pins. At the same time, the sleeve 2 used for anti-torsion is also used to cover the connection between adjacent drill pipes 1 to avoid pressure relief, thereby avoiding the problem of being unable to bring mud and sand out to the wellhead due to the drop in drilling fluid pressure.

[0024] Embodiment 2: On the basis of Example 1, Figure 3-Figure 6 As shown, a sealing ring 4 is also included; the lower end of the drill rod 1 is detachably connected with the sealing ring 4 to improve the sealing performance.

[0025] The sliding sleeve 2 is provided with a plurality of grooves 96 .

[0026] The opening of the second groove 96 faces downward, and the liquid impacts the second groove 96 from bottom to top, exerting an upward thrust on the sliding sleeve 2.

[0027] The top of the second groove 96 is rounded to prevent sand from getting stuck in the second groove 96 .

[0028] The threaded portion 92 is in a frustum shape, which makes it easier for the upper drill rod 1 to be inserted into the lower drill rod 1, thereby making it easier for the two drill rods 1 to be screwed together.

[0029] The positions where the outer diameter of the drill pipe 1 changes are all provided with bevels, which can reduce the resistance of the liquid when it flows outside the drill pipe 1.

[0030] The drill rod 1 is made of rust-proof material to prevent rust.

[0031] The drill rod 1 is clamped with the sealing ring 4, so that the sealing ring 4 can be easily replaced.

[0032] A sealing ring is provided at the lower end of the drill rod 1 to improve the sealing performance.

[0033] After the two drill pipes 1 are spliced ​​together, the spring 3 applies an upward thrust to the sleeve 2, so that the sleeve 2 presses the sealing ring 4 onto the drill pipe 1, and the gap between the sleeve 2 and the upper drill pipe 1 is sealed by the sealing ring 4. Figure 6 As shown, the drilling fluid flows upward on the outside of the drill pipe 1. At this time, a second groove 96 is opened on the sleeve 2. When the drilling fluid flows upward, it will impact the second groove 96, thereby exerting an upward impact force on the sleeve 2, thereby increasing the pressing force of the sleeve 2 on the sealing ring 4, and further improving the sealing between the sleeve 2 and the upper drill pipe 1. That is, the upwardly reflected drilling fluid is used to drive the sleeve 2 to move upward, so as to enhance the sealing effect of the sleeve 2 on the connection between the adjacent drill pipes 1, further avoid the occurrence of pressure relief, and ensure that the drilling fluid has sufficient pressure to discharge mud and sand from the well.

[0034] The technical principles of the embodiments of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as limiting the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the embodiments of the present invention without creative work, and these methods will fall within the protection scope of the embodiments of the present invention.

Claims

1. A drill rod with anti-torsion function, comprising a drill rod (1); a channel (91) is provided on the drill rod (1); a threaded portion (92) is provided at both the upper end and the lower end of the drill rod (1); the characteristics are as follows: The invention also comprises a sleeve (2) and a spring (3); the upper end of the drill rod (1) is sealed and slidably connected to the sleeve (2); a plurality of springs (3) are fixedly connected to the sleeve (2), and the springs (3) are fixedly connected to the drill rod (1); a plurality of raised portions (93) are arranged at the upper end of the drill rod (1); a plurality of raised portions (94) are arranged at the lower end of the drill rod (1), and the raised portions (94) are aligned with the corresponding raised portions (93); and a plurality of grooves (95) are arranged on the sleeve (2), and the grooves (95) are located outside the corresponding raised portions (93).

2. The drill rod with anti-torsion function according to claim 1, characterized in that: It also includes a sealing ring (4); the sealing ring (4) is detachably connected to the lower end of the drill rod (1).

3. The drill rod with anti-torsion function according to claim 2, characterized in that: The sliding sleeve (2) is provided with a plurality of grooves 2 (96).

4. The drill rod with anti-torsion function according to claim 3, characterized in that: The opening of the second groove (96) faces downward.

5. The drill rod with anti-torsion function according to claim 4, characterized in that: The top of the second groove (96) is rounded.

6. The drill rod with anti-torsion function according to claim 5, characterized in that: The threaded portion (92) is in the shape of a truncated cone.

7. The drill rod with anti-torsion function according to claim 5, characterized in that: The drill rod (1) is provided with an oblique angle at each location where the outer diameter changes.

8. The drill rod with anti-torsion function according to claim 7, characterized in that: The drill rod (1) is made of rust-proof material.

9. The drill rod with anti-torsion function according to claim 8, characterized in that: The drill rod (1) is clamped with the sealing ring (4).

10. A drill rod with anti-torsion function according to any one of claims 1 to 9, characterized in that: A sealing ring is provided at the lower end of the drill rod (1).

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