Torsion impactor for well drilling

Abstract

The utility model relates to the technical field of rock breaking and drilling tools, and discloses a torque impactor for drilling, which comprises an impeller-driven torque impactor main body for drilling, a rotatable impeller shaft is arranged in the impeller-driven torque impactor main body, a convex ring is integrally constructed in the middle of the impeller shaft, and a sleeve is adaptively sleeved on the impeller shaft at the upper part of the convex ring. An impeller is welded in the sleeve, external threads are arranged at the upper part of an impeller shaft, and the impeller shaft is connected with a locking nut through the external threads; a plurality of key strips are integrally constructed on the outer wall of the impeller shaft on the upper portion of the cam, a plurality of key grooves are formed in the inner wall of the sleeve in a clamped mode, and the key strips are inserted into the key grooves in a matched mode. When the impeller is abraded due to long-term use of the impeller-driven torsion impactor main body in the later period, personnel only need to detach the locking nut and then detach the sleeve from the impeller shaft, so that the whole impeller is detached and then replaced by a new impeller, and the whole impeller shaft structure does not need to be replaced, so that the operation is simple and convenient. And the later maintenance cost of the impeller-driven torsion impactor main body is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the rock breaking drilling tool technical field, concretely is a kind of torsion impactor for drilling. BACKGROUND

[0002] Torsion impactor has been widely used in the drilling of oil and gas industry, especially in sandstone and carbonate rock sedimentary rock formation, and has shown significant speed-up effect. The main functions of drilling torsion impactor include eliminating vibration, improving mechanical drilling speed and ensuring wellbore quality. Specifically, torsion impactor generates high-frequency, low-amplitude torsional impact, which directly acts on PDC drill bit, eliminates lateral, longitudinal and torsional vibration generated by drill bit during downhole movement, and keeps the torque of drill string stable and balanced. This design cleverly converts the fluid energy of mud into high-frequency, stable mechanical impact energy, which is transmitted to PDC drill bit, thereby improving the cutting efficiency of drill bit and wellbore quality.

[0003] After searching, a kind of impeller drive torsion impactor for drilling is disclosed in the publication number CN111456624B, its main features are: including upper joint, middle body, impeller shaft, impact hammer, lower joint;Middle body is provided with middle body baffle in the inside radial direction, lower joint is provided with lower joint baffle in the inside radial direction, middle body is provided with shunt orifice plate, impeller shaft is provided with impeller and flow guide hole in sequence, lower joint baffle central position is provided with throttling nozzle seat, lower joint baffle is provided with pressure relief hole, four impact baffles are vertically fixed below the lower joint baffle, so that the adjacent two pressure relief holes are located between the two impact baffles, forming an impact chamber;Impact hammer is located between lower joint baffle and middle body baffle, drilling fluid enters the inside of middle body through shunt orifice plate, impact impeller makes impeller shaft rotate, drilling fluid enters impeller shaft through flow guide hole, and flows into the space between support ring and impeller shaft through reversing liquid hole, and enters pressure relief hole or impact fan through flow-through hole, so that impact fan reciprocates in impact chamber.

[0004] The above-mentioned impeller drive torsion impactor in actual use, applicant finds that: the above-mentioned is driven by drilling fluid to rotate impeller shaft, but impeller and impeller shaft are integrated structure, with the use of torsion impactor, impeller will be impacted and abraded by particles in drilling fluid, thereby affecting the rotary power, but when the integrated structure is worn out and cannot be used, the whole impeller shaft structure can only be replaced, and the maintenance cost is high in later period. In order to solve the above-mentioned problems, a split type impeller torsion impactor for drilling is proposed. UTILITY MODEL CONTENTS

[0005] The utility model aims at: in order to solve the above-mentioned problems, provide a kind of torsion impactor for drilling.

[0006] The utility model discloses a technical scheme as follows: A torsion impactor for drilling, comprising a impeller-driven torsion impactor body for drilling, a rotatable impeller shaft is arranged in the impeller-driven torsion impactor body, a convex ring is integrally formed in the middle part of the impeller shaft, a sleeve is fitted and sleeved on the impeller shaft at the upper part of the convex ring, an impeller is welded in the sleeve, an external thread is arranged on the upper part of the impeller shaft, and a locking nut is connected to the external thread.

[0007] A plurality of key strips are integrally formed on the outer wall of the impeller shaft at the upper part of the cam, a plurality of key grooves are clamped on the inner wall of the sleeve, and the key strips and the key grooves are fitted and inserted.

[0008] In a preferred embodiment, the number of locking nuts is two.

[0009] In a preferred embodiment, a flow guide hole is formed in the middle part of the impeller shaft.

[0010] In a preferred embodiment, a reversing liquid hole is formed in the lower part of the impeller shaft.

[0011] In a preferred embodiment, the impeller shaft has an axial through structure from the flow guide hole to the reversing liquid hole.

[0012] As described above, the utility model has the following beneficial effects:

[0013] 1. In the utility model, the impeller in the impeller-driven torsion impactor body for drilling is sleeved on the impeller shaft through the sleeve, the key grooves and the key strips are inserted, and then the impeller is locked on the impeller shaft by using the locking nut. Compared with the existing integral structure, when the impeller-driven torsion impactor body for drilling is used for a long time and the impeller is worn out, the staff only needs to remove the locking nut, then remove the sleeve from the impeller shaft, and then remove the entire impeller. Then, a new one can be replaced, so that the entire impeller shaft structure does not need to be replaced, and the maintenance cost of the impeller-driven torsion impactor body for drilling in the later period is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is an internal structure diagram of the impeller-driven torsion impactor body of the utility model;

[0015] Fig. 2 It is an exploded perspective structural diagram of the sleeve and the impeller shaft of the utility model.

[0016] Markings in the figure: 1-impeller-driven torsion impactor body for drilling, 2-impeller shaft, 3-convex ring, 4-sleeve, 5-impeller, 6-external thread, 7-locking nut, 9-key strip, 10-key groove, 11-flow guide hole, 12-reversing liquid hole. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] The following will combine Figs. 1-2 A detailed description of a drilling torque impactor according to an embodiment of the present invention will be provided.

[0019] Example:

[0020] This utility model provides a drilling torque impactor, referenced... Figs. 1-2 As shown, the device includes a main body 1 for a drilling impeller-driven torque impactor. A rotatable impeller shaft 2 is installed inside the main body 1. A convex ring 3 is integrally formed in the middle of the impeller shaft 2. A sleeve 4 is fitted onto the upper part of the impeller shaft 2 above the convex ring 3. An impeller 5 is welded inside the sleeve 4. An external thread 6 is provided on the upper part of the impeller shaft 2, and a locking nut 7 is connected to the impeller shaft 2 via the external thread 6. In this structure, the impeller 5 inside the impeller-driven torque impactor main body 1 is welded to the sleeve 4. The sleeve 4 is then fitted onto the impeller shaft 2, and the locking nut 7, in conjunction with the convex ring 3, locks and fixes it to the impeller shaft 2. Later, when the impeller 5 wears out due to long-term use of the impeller-driven torque impactor main body 1, personnel only need to remove the locking nut 7 and then remove the sleeve 4 from the impeller shaft 2 to disassemble the entire impeller 5 and replace it with a new one. This eliminates the need to replace the entire impeller shaft 2 structure, saving on later maintenance costs.

[0021] refer to Figs. 1-2 As shown, the outer wall of the upper impeller shaft 2 of the convex ring 3 is integrally constructed with multiple key bars 9, and the inner wall of the sleeve 4 is fitted with multiple keyways 10. The key bars 9 and keyways 10 are adapted to be inserted into each other. This structure uses the cooperation between the key bars 9 and keyways 10 to prevent the sleeve 4 and the impeller shaft 2 from rotating relative to each other, while ensuring stable power transmission between the impeller 5 and the impeller shaft 2.

[0022] refer to Figs. 1-2 As shown, there are two locking nuts 7, which serve to prevent loosening.

[0023] refer to Figs. 1-2As shown, a guide hole 11 is provided in the middle of the impeller shaft 2, and a reversing fluid hole 12 is provided in the lower part of the impeller shaft 2. The impeller shaft 2 has an axial through structure from the guide hole 11 to the reversing fluid hole 12. This structure allows drilling fluid to enter the interior of the impeller shaft 2 through the guide hole 11 and flow into the reversing fluid hole 12. The circumferential fluid hole 12 allows drilling fluid to enter between the support ring and the impeller shaft 2, thereby driving the impact cone to perform cyclic oscillating cone impact.

[0024] It should be noted that the specific structure and principle of the impeller-driven torque impactor body 1 have been disclosed, and can be found in patent CN111456624B. Its specific structural features also include an upper connector, a middle body, an impact hammer, and a lower connector. One end of the upper connector is fixedly connected to one end of the middle body, and the other end of the middle body is fitted onto one end of the lower connector and rotatably sealed to it. A middle body baffle is provided radially inside the middle body, and a lower connector baffle is provided radially inside the lower connector. Stepped structures are provided on both sides of the impeller shaft 2. A flow-diverting plate is fixedly provided on the side of the middle body that is fixed to the upper connector. The flow-diverting plate has several flow-diverting holes. One end of the impeller shaft 2 is inserted into the flow-diverting plate and limited by the stepped structure at that end. The other end of the impeller shaft 2 passes through the middle body baffle and is limited by the stepped structure at that end. The impeller 5 and the guide hole 11 on the impeller shaft 2 are located between the flow-diverting plate and the middle body baffle. The components are arranged axially in sequence, with the reversing fluid hole 12 located on one side where the impeller shaft 2 passes through the middle body baffle; a throttling nozzle seat is located in the center of the lower connector baffle, and four evenly distributed pressure relief holes are provided on the lower connector baffle around the throttling nozzle seat; four impact baffles are fixedly provided vertically to the lower connector baffle, so that two adjacent pressure relief holes are located between two impact baffles to form an impact cavity; the impact hammer includes a support ring, on which two centrally symmetrical fan-shaped impact fans are provided, and a flow hole is provided on the support ring between the two fan-shaped impact fans; the impact hammer is located between the lower connector baffle and the middle body baffle, and the impeller shaft 2 passes through the support ring and communicates with the throttling nozzle seat; upper cylindrical roller bearings and lower cylindrical roller bearings are respectively provided at the upper and lower ends of the impact hammer and the impeller shaft 2 in contact; upper tapered roller bearings and lower tapered roller bearings are respectively provided between the impeller shaft 2 and the diversion orifice plate and the middle body baffle;

[0025] When the impeller-driven torque impactor is running, the drilling fluid enters the interior of the main body through the diversion plate, impacting the impeller and causing the impeller shaft 2 to rotate. The drilling fluid enters the impeller shaft 2 through the guide hole 11, and flows into the space between the support ring and the impeller shaft 2 through the reversing fluid hole 12. It then enters the pressure relief hole or impacts the impact fan through the flow hole, causing the impact fan to rotate back and forth in the impact chamber. When the impact fan covers one of the pressure relief holes in the impact chamber, it can expose the other pressure relief hole.

[0026] The implementation principle of a drilling torque impactor according to an embodiment of this application is as follows: the impeller 5 inside the impeller-driven torque impactor body 1 is welded to the casing 4, and then the casing 4 is fitted onto the impeller shaft 2. Then, the locking nut 7 and the convex ring 3 are used to lock and fix it on the impeller shaft 2. Later, when the impeller 5 wears due to long-term use of the impeller-driven torque impactor body 1, the personnel only need to remove the locking nut 7 and then remove the casing 4 from the impeller shaft 2, thereby disassembling the entire impeller 5 and replacing it with a new one. This eliminates the need to replace the entire impeller shaft 2 structure, reducing the maintenance cost of the impeller-driven torque impactor body 1 in the later stages.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drilling torque impactor, comprising a drilling impeller-driven torque impactor body (1), characterized in that: The impeller-driven torque impactor body (1) is provided with a rotatable impeller shaft (2). The middle part of the impeller shaft (2) is integrally constructed with a convex ring (3). A sleeve (4) is adapted to be fitted on the upper part of the impeller shaft (2). An impeller (5) is welded inside the sleeve (4). The upper part of the impeller shaft (2) is provided with an external thread (6). The impeller shaft (2) is connected to a locking nut (7) through the external thread (6). The outer wall of the impeller shaft (2) on the upper part of the convex ring (3) is integrally constructed with multiple key strips (9), and the inner wall of the sleeve (4) is provided with multiple keyways (10), and the key strips (9) are adapted to be inserted into the keyways (10).

2. The drilling torque impactor as described in claim 1, characterized in that: The number of locking nuts (7) is two.

3. A drilling torque impactor as described in claim 1, characterized in that: A guide hole (11) is provided in the middle of the impeller shaft (2).

4. A drilling torque impactor as described in claim 3, characterized in that: The lower part of the impeller shaft (2) is provided with a reversing fluid hole (12).

5. A drilling torque impactor as described in claim 4, characterized in that: The impeller shaft (2) has an axially continuous structure from the guide hole (11) to the commutation fluid hole (12).

Images