Torsion impactor

Abstract

The utility model relates to the technical field of drilling engineering, in particular to a torsion impactor which comprises a shell, a driving hammer is slidably connected into the shell, a through hole is formed in the center of the driving hammer, an insertion pipe is slidably connected to the front side of the through hole, and liquid openings are formed in the upper side and the lower side of the front end of the insertion pipe. Through pipes are formed in the positions, corresponding to the liquid openings, of the surface of the driving hammer, the middles of the through pipes communicate with return pipes, the tail ends of the return pipes are located on the rear end face of the driving hammer, communicating grooves are formed in the tail end of the outer side of the driving hammer at equal intervals, and a plugging ring is fixedly connected to the middle of the outer side of the driving hammer; a U-shaped groove is formed in the position, close to the plugging ring, of the inner side of the shell, the front end of the driving hammer is sleeved with a connecting sleeve, and grooves are formed in the outer side of the connecting sleeve at equal intervals. The utility model aims to provide a torsion impacter to solve the problems that an existing torsion impacter is generally low in impact frequency and poor in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling engineering, in particular to a torsion impactor. Background Art

[0002] During the drilling process, when the drill bit encounters non-homogeneous formations such as soft and hard interlaced formations or formations containing flint, the drill bit often generates adverse vibrations such as stick-slip vibration and lateral vortex, causing tooth collapse and broken teeth, which affects the rotation speed and service life of the drill bit. In order to eliminate the above-mentioned adverse phenomena, after analyzing the rock breaking sensitivity of non-homogeneous formations, a torque impactor is added to the conventional rotary cutting rock breaking drill bit. The axial reciprocating torsional impact load generated by the torque impactor is used to make the drill bit cut the formation at a higher speed and greater torque, avoiding stick-slip vibration and lateral vortex caused by insufficient drill bit torque. Drill bits equipped with torque impactors have been widely used in oil and gas exploration, ground well exploration, and geothermal well development. Therefore, it is particularly necessary to optimize the structure of the torque impactor to solve the problems of low impact frequency and poor stability of existing torque impactors. Utility Model Content

[0003] The utility model aims to provide a torsion impactor to solve the problems of low impact frequency and poor stability commonly existing in existing torsion impactors.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A torque impactor comprises a shell, wherein a hammer is slidably connected to the inside of the shell, a through hole is provided at the center of the hammer, a plug is slidably connected to the front side of the through hole, liquid ports are provided on the upper and lower sides of the front end of the plug, through pipes are provided on the surface of the hammer and at positions corresponding to the liquid ports, a return pipe is connected to the middle part of the through pipe, the tail end of the return pipe is located on the rear end surface of the hammer, connecting grooves are equidistantly provided at the outer tail end of the hammer, a sealing ring is fixedly connected to the middle part of the outer side of the hammer, a U-shaped groove is provided on the inner side of the shell and close to the sealing ring, a connecting sleeve is sleeved on the front end of the hammer, grooves are equidistantly provided on the outer side of the connecting sleeve, a drainage pipe is provided in the side wall of the connecting sleeve and at positions corresponding to the tail side of the groove, the tail end of the drainage pipe is located at the tail end of the connecting sleeve and is connected to its inner cavity, and a drainage port is provided on the surface of the shell and at positions corresponding to the groove at an angle of 45° to the rear.

[0006] Preferably, the tail side of the cannula is sleeved with a connecting seat, the connecting seat is sleeved in the outer shell, the tail end of the connecting seat is fixedly connected to a first spring, the tail end of the first spring is fixedly connected to a first wedge-shaped plug, the first wedge-shaped plug is sealed at the outlet of the liquid inlet joint, and the liquid inlet joint is threadedly connected to the tail end of the outer shell.

[0007] Preferably, a drill bit limiting ring is arranged on the front side of the connecting sleeve, a drill bit mounting sleeve is arranged on the front side of the drill bit limiting ring, and the drill bit mounting sleeve is threadedly connected to the outer shell.

[0008] Preferably, the front end of the drain pipe is blocked with a second wedge-shaped plug, the front end of the second wedge-shaped plug is fixedly connected to a second spring, the second spring is embedded in the connecting sleeve, and the front end is fixedly connected to an end cover, and the end cover is threadedly connected to the connecting sleeve.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. In the utility model, a movable hammer is added in the shell, and the drilling fluid pressurized by the pipe cooperates with the cannula and the upper liquid port and the pipe, return pipe, connecting groove and plugging ring in the hammer, so as to realize the change of negative pressure in the cavity before and after the hammer, thereby driving the hammer to perform continuous reciprocating motion in the shell to realize the impact on the drill bit. The impact frequency is relatively high, so that the drill bit has a larger torque, which reduces the risk of stick-slip vibration and lateral vortex of the drill bit and ensures the stable operation of the drill bit.

[0011] 2. In the utility model, the hammer is used to impact and drain the fluid at an angle of 45° backward, so that the drill cuttings on the well wall can be cleaned in time to prevent the drill cuttings from accumulating and jamming the drill, so as to further ensure the stability of the drill bit. The oblique rear drainage design can use the drainage impact force to push the well wall back, thereby making the drill bit close to the bottom of the well, preventing the drill bit from being depressurized, and ensuring the directional operation capability of the drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an axial view of a torque impactor of the utility model;

[0013] Figure 2 This is a main structural cross-sectional view of a torque impactor of the utility model;

[0014] Figure 3 This is a schematic diagram of the initial structure of a torque impactor in the application state of the utility model;

[0015] Figure 4 It is a schematic diagram of the front chamber pressurization structure of a torque impactor in the application state of the utility model;

[0016] Figure 5 It is a schematic diagram of the rear chamber pressurization structure of a torque impactor in the application state of the utility model.

[0017] In the figure: 1. shell; 2. hammer; 3. through hole; 4. insert tube; 5. liquid port; 6. through pipe; 7. return pipe; 8. connecting groove; 9. sealing ring; 10. U-shaped groove; 11. connecting sleeve; 12. groove; 13. drain pipe; 14. drain port; 15. connecting seat; 16. first spring; 17. first wedge-shaped plug; 18. liquid inlet joint; 19. drill bit limit ring; 20. drill bit mounting sleeve; 21. second wedge-shaped plug; 22. second spring; 23. end cover. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-5 , the utility model provides a technical solution:

[0020] A torque impactor comprises a shell 1, a hammer 2 is slidably connected inside the shell 1, a through hole 3 is provided at the center of the hammer 2, a plug 4 is slidably connected to the front side of the through hole 3, a liquid port 5 is provided at both the upper and lower sides of the front end of the plug 4, a through pipe 6 is provided at the surface of the hammer 2 and at a position corresponding to the liquid port 5, a return pipe 7 is connected to the middle of the through pipe 6, the tail end of the return pipe 7 is located on the rear end surface of the hammer 2, a connecting groove 8 is equidistantly provided at the outer tail end of the hammer 2, and a A sealing ring 9 and a U-shaped groove 10 are provided on the inner side of the outer shell 1 and near the sealing ring 9, a connecting sleeve 11 is sleeved on the front end of the hammer 2, grooves 12 are equidistantly provided on the outer side of the connecting sleeve 11, a drainage pipe 13 is provided in the side wall of the connecting sleeve 11 and at a position corresponding to the tail side of the groove 12, the tail end of the drainage pipe 13 is located at the tail end of the connecting sleeve 11 and is connected to the inner cavity thereof, and a drainage port 14 is provided on the surface of the outer shell 1 and at a position corresponding to the groove 12 at an angle of 45° to the rear.

[0021] In this embodiment, see Figure 2 The tail side of the cannula 4 is sleeved with a connecting seat 15, and the connecting seat 15 is sleeved in the shell 1. The tail end of the connecting seat 15 is fixedly connected with a first spring 16, and the tail end of the first spring 16 is fixedly connected with a first wedge plug 17. The first wedge plug 17 blocks the outlet of the liquid inlet joint 18 to achieve one-way liquid inlet and form a one-way valve design; the liquid inlet joint 18 is threadedly connected to the tail end of the shell 1 for connecting the drill string.

[0022] In this embodiment, see Figure 2A drill bit limiting ring 19 is arranged on the front side of the connecting sleeve 11, and a drill bit mounting sleeve 20 is arranged on the front side of the drill bit limiting ring 19. The drill bit mounting sleeve 20 is threadedly connected to the housing 1 for limiting the drill bit installation.

[0023] In this embodiment, see Figure 3 The front end of the drainage pipe 13 is blocked with a second wedge-shaped plug 21, and the front end of the second wedge-shaped plug 21 is fixedly connected to a second spring 22, which is embedded in the connecting sleeve 11 to realize a one-way drainage design, thereby preventing the drilling fluid from flowing back and carrying drilling debris into the outer shell to cause damage to the impactor, thereby improving the operating stability of the impactor; and the front end is fixedly connected with an end cover 23, which is threadedly connected to the connecting sleeve 11, so that the second wedge-shaped plug and the second spring can be disassembled and assembled, and later maintenance and repair can be facilitated.

[0024] Working principle of the utility model: during installation, first remove the drill bit installation sleeve 20, take out the drill bit limiting ring 19, then pass the drill bit tail through the drill bit installation sleeve 20, and then limit and fix the drill bit through the drill bit limiting ring 19, then install the drill bit installation sleeve 20 back into the housing 1, connect the liquid inlet joint 18 to the drill string, as shown in FIG. Figure 3 .

[0025] When in use, the drilling fluid in the drill string will pass through the first wedge-shaped plug 17 in the liquid inlet joint 18 under pressure and then enter the cannula 4. At this time, the liquid port 5 is located at the tail end of the hammer 2 and is in an exposed state. Figure 3 , part of the drilling fluid will enter the rear cavity between the connecting seat 15 and the hammer 2 from the liquid port 5, and then use the drilling fluid thrust to make the front end of the hammer tightly press the tail end of the connecting sleeve 11, while the other part of the drilling fluid will pass through the central through hole 3 of the hammer 2 and the connecting sleeve 11, and spray out from the front end of the drill bit. The pressurized drilling fluid will impact the bottom of the well, and then form a force to push the drill bit backward, so that the drill bit moves backward, so that its tail end is tightly attached to the front end of the hammer 2, and pushes the hammer 2 backward; as the hammer 2 moves backward, during this process, when the sealing ring 9 on the surface of the hammer 2 enters the U-shaped groove 10, a gap will be formed between the sealing ring 9 and the U-shaped groove 10, as shown in FIG. Figure 4 At this time, the drilling fluid will enter the front cavity between the hammer 2 and the connecting sleeve 11 through the gap, and the drilling fluid in the rear cavity will also enter the front cavity along the gap and the connecting groove 8 (at this time, the liquid port 5 is inside the hammer 2 and is in a blocked state). As the drilling fluid at the front end outlet of the cannula 4 is continuously injected into the front cavity through the through pipe 6, the pressure in the front cavity will increase, forming a high-pressure area to drive the hammer 2 to continue to move backward, and then the front end of the cannula 4 will block the through pipes 6 on both sides (at this time, the blocking ring 9 leaves the U-shaped groove 10, so that the rear cavity forms a closed space), and then as the hammer 2 continues to move backward under pressure, the liquid port 5 on the cannula 4 will overlap with the through pipe 6, as shown in FIG. Figure 5, and then the pressurized drilling fluid in the cannula 4 will continuously enter the front chamber through the pipe 6 and the return pipe 7. As the hammer 2 continues to move backward and part of the pressurized drilling fluid enters the front chamber, the closed tail chamber will be gradually pressurized. During the backward movement of the hammer 2, its front end will gradually be pulled out of the connecting sleeve 11 and separated from the connecting sleeve 11. In this process, the tail end of the discharge pipe 13 at the tail end of the connecting sleeve 11 will be exposed. Then, under the action of high pressure, a part of the drilling fluid in the front chamber will quickly pass through the center of the connecting sleeve 11 into the drill bit to be converging and sprayed out, and the other part will squeeze the second wedge-shaped plug 21 through the discharge pipe 13 to make it The fluid is opened and quickly ejected backward at 45° from the groove 12 through the discharge port 14, thereby impacting the well wall to clean the drilling debris on the well wall surface to prevent the drill from getting stuck. At the same time, the thrust generated by the oblique backward 45° impact can be used to cooperate with the forward-moving drill string to ensure that the drill bit is close to the bottom of the well for drilling operations to prevent slippage. Then, with the pressurization of the tail chamber and the decompression of the front chamber, the hammer 2 will move forward quickly to hit the drill bit, thereby driving the drill bit forward. Then, with the continuous injection of pressurized drilling fluid, the above operation can be repeated to impact the drill bit, so that the drill bit obtains impact force, thereby improving the drilling effect of the drill bit.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A torque impactor, comprising a housing (1), characterized in that: The inside of the shell (1) is slidably connected to a hammer (2), the center of the hammer (2) is provided with a through hole (3), the front side of the through hole (3) is slidably connected to a plug (4), the front end of the plug (4) is provided with liquid ports (5) on both the upper and lower sides, the surface of the hammer (2) and the position corresponding to the liquid port (5) are provided with a through pipe (6), the middle of the through pipe (6) is connected to a return pipe (7), the tail end of the return pipe (7) is located on the rear end surface of the hammer (2), the outer tail end of the hammer (2) is equidistantly provided with connecting grooves (8), and the middle of the outer side of the hammer (2) is fixedly connected with a sealing member. A U-shaped groove (10) is provided on the inner side of the shell (1) and near the sealing ring (9); a connecting sleeve (11) is sleeved on the front end of the hammer (2); grooves (12) are equidistantly provided on the outer side of the connecting sleeve (11); a drainage pipe (13) is provided in the side wall of the connecting sleeve (11) and at a position corresponding to the rear side of the groove (12); the rear end of the drainage pipe (13) is located at the rear end of the connecting sleeve (11) and is connected to the inner cavity thereof; a drainage port (14) is provided on the surface of the shell (1) and at a position corresponding to the groove (12) at an angle of 45° to the rear.

2. A torque impactor according to claim 1, characterized in that: The rear side of the cannula (4) is sleeved with a connecting seat (15), the connecting seat (15) is sleeved in the housing (1), the rear end of the connecting seat (15) is fixedly connected to a first spring (16), the rear end of the first spring (16) is fixedly connected to a first wedge-shaped plug (17), the first wedge-shaped plug (17) blocks the outlet of a liquid inlet connector (18), and the liquid inlet connector (18) is threadedly connected to the rear end of the housing (1).

3. A torque impactor according to claim 1, characterized in that: A drill bit limiting ring (19) is arranged on the front side of the connecting sleeve (11), a drill bit mounting sleeve (20) is arranged on the front side of the drill bit limiting ring (19), and the drill bit mounting sleeve (20) is threadedly connected to the outer shell (1).

4. A torque impactor according to claim 1, characterized in that: The front end of the discharge pipe (13) is blocked by a second wedge-shaped plug (21), the front end of the second wedge-shaped plug (21) is fixedly connected to a second spring (22), the second spring (22) is embedded in the connecting sleeve (11), and the front end is fixedly connected to an end cover (23), and the end cover (23) is threadedly connected to the connecting sleeve (11).

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