A three-clamp servo-driven electric slip

Abstract

The present invention discloses a three-clamp servo-driven electric slip, which relates to the technical field of oil drilling machinery and equipment. Its specific structure includes a body, which is square, and a receiving cavity is arranged inside the body, and a through hole is opened in the middle of the body; an intermediate body is installed inside the receiving cavity; a driving mechanism is installed outside the body, and the output end of the driving mechanism extends to the inside of the receiving cavity and is connected to the intermediate body; a centering mechanism is installed above the body, and the end of the centering mechanism corresponds to the through hole; the driving mechanism includes: at least two electric drive units, which are respectively installed on both sides of the body, and the active ends of the electric drive units are located in the receiving cavity; a connecting rod assembly, both ends of which are respectively connected to the output ends of the electric drive units, and the connecting rod assembly is hinged to the intermediate body. The present invention solves the technical problem that the existing slips cannot be accurately controlled when clamping the drill pipe.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling mechanical equipment, in particular to a three-clamp servo-driven electric slip. Background Art

[0002] In the prior art, the drilling slips are controlled and driven by pneumatic or hydraulic pressure, and there are many external pipelines on site, which lacks safety. In the actual drilling process, sometimes the slips need to be removed according to the on-site process requirements, and it is very inconvenient to disassemble the pipelines. Moreover, if the markings are not clear during disassembly and assembly, it is easy to get confused.

[0003] At the same time, air pressure control and hydraulic control cannot determine the situation of empty drilling, which will affect the subsequent drilling work, and the clamping tightness of the drill pipe cannot be well fed back, which is not conducive to the staff to make adjustments. Summary of the invention

[0004] The purpose of the present invention is to provide a three-clamp servo-driven electric slip, which solves the technical problem in the prior art that the slip cannot be accurately controlled when clamping a drill rod.

[0005] The embodiment of the present application discloses a three-clamp servo-driven electric slip, comprising:

[0006] The main body is square and has a receiving cavity inside. A through hole is opened in the middle of the main body;

[0007] An intermediate body installed inside the accommodating cavity;

[0008] A driving mechanism is installed outside the main body, and an output end of the driving mechanism extends into the accommodating cavity and is connected to the intermediate body;

[0009] A centering mechanism is installed above the body, and an end of the centering mechanism corresponds to the through hole;

[0010] The driving mechanism comprises:

[0011] At least two electric drive units are respectively installed on two sides of the body, and the movable ends of the electric drive units are located in the accommodating cavity;

[0012] A connecting rod assembly has two ends respectively connected to the output ends of the electric drive unit, and the connecting rod assembly is hinged to the intermediate body.

[0013] The present application adopts the electric drive unit and the connecting rod assembly to cooperate with each other, which can realize the stable movement of the intermediate body, thereby realizing the clamping and loosening of the drill rod.

[0014] Based on the above technical solution, the embodiment of the present application can also be improved as follows:

[0015] Furthermore, the electric drive unit comprises:

[0016] A servo motor is installed on the side of the body;

[0017] An electric cylinder connected to the servo motor;

[0018] The rack is connected to the piston rod end of the electric cylinder. The rack moves along its length direction driven by the electric cylinder. The beneficial effect of adopting this step is that the rack is driven to move by the servo motor, thereby achieving precise positioning of the rack.

[0019] Furthermore, at least two adjustment pads are installed inside the accommodating cavity, the adjustment pads correspond to the rack one by one, and the adjustment pads are located below the rack. The beneficial effect of adopting this step is that the specific height of the rack can be controlled by the adjustment pads, thereby controlling the movement amplitude of subsequent other components.

[0020] Furthermore, the connecting rod assembly comprises:

[0021] At least two gears mesh with the racks in a one-to-one correspondence;

[0022] A spline shaft, with the gears mounted on both ends of the spline shaft;

[0023] At least two driving connecting rods are installed on the spline shaft at intervals, and the ends of the driving connecting rods are hinged to the intermediate body. The beneficial effect of adopting this step is that the synchronization of subsequent movement is ensured by the spline shaft.

[0024] Furthermore, there are at least two centering mechanisms, and the centering mechanisms are respectively hinged to two sides of the body. The beneficial effect of adopting this step is to ensure the centering of the drill rod.

[0025] Furthermore, the centering mechanism comprises:

[0026] A centering shell is hinged to the body, and an assembly cavity is provided inside the centering shell;

[0027] A centering motor is installed inside the assembly cavity;

[0028] A centering electric cylinder is installed inside the assembly cavity, and an output end of the centering electric cylinder faces the through hole;

[0029] The centering component is installed at the output end of the centering electric cylinder. The beneficial effect of adopting this step is to complete the centering of the drill rod through the movement of the centering component.

[0030] Furthermore, the centering component comprises:

[0031] A centering mounting seat connected to the output end of the centering electric cylinder;

[0032] A centering plate is installed on the side of the centering mounting seat facing the through hole. The beneficial effect of this step is that the centering process of the drill pipe is completed through the centering plate.

[0033] Furthermore, the centering mechanism also includes a wear-resistant ring, which is installed on the side of the centering shell facing the through hole, and the wear-resistant ring is located below the centering plate. The beneficial effect of this step is that the drill pipe can be well protected by the wear-resistant ring.

[0034] Furthermore, a locking groove is arranged on the outer side of the centering shell, and the locking grooves of the two centering shells correspond to each other, and a locking block is arranged inside the locking groove. The beneficial effect of adopting this step is that the locking groove and the locking block cooperate with each other to ensure the stability of the centering shell during use.

[0035] Furthermore, the locking block comprises:

[0036] A horizontal section, the width of the horizontal section is D, the width of the locking groove is d, d<D≤2d;

[0037] The vertical section is installed on the horizontal section. The beneficial effect of adopting this step is that the stability of the centering shell can be better guaranteed through the size of the horizontal section.

[0038] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0039] 1. The present application is provided with an electrically driven driving mechanism and an electrically driven centering mechanism to complete the electronic control, which can accurately provide numerical feedback and better clamp the drill rod.

[0040] 2. The electric drive unit in the present application is combined with components such as racks and gears to achieve stable movement of the intermediate body, and can achieve synchronous movement when combined with the spline shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a structural schematic diagram of a three-clamp servo-driven electric slip according to a specific embodiment of the present invention;

[0043] Figure 2 for Figure 1 Schematic diagram of the structure after removing the main body;

[0044] Figure 3 It is a structural schematic diagram of another angle of a three-clamp servo-driven electric slip according to a specific embodiment of the present invention;

[0045] The specific reference numerals are as follows:

[0046] 1-main body; 2-intermediate body; 3-driving mechanism; 4-centering mechanism;

[0047] 101-accommodating cavity; 102-through hole; 103-adjusting pad;

[0048] 301-electric drive unit; 302-connecting rod assembly; 303-servo motor; 304-electric cylinder; 305-rack; 306-gear; 307-spline shaft; 308-driving connecting rod;

[0049] 401-centering shell; 402-assembly cavity; 403-centering motor; 404-centering electric cylinder; 405-centering assembly; 406-centering mounting seat; 407-centering plate; 408-wear-resistant ring; 409-locking groove; 410-locking block; 411-horizontal section; 412-vertical section. DETAILED DESCRIPTION

[0050] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0051] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0052] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0054] Example:

[0055] like Figure 1-3As shown, an embodiment of the present application discloses a three-clamp servo-driven electric cava, which replaces the hydraulic cylinder drive mechanism with an electric drive mechanism, can accurately control the position, and facilitates the feedback of the position of the intermediate body, thereby achieving real-time control.

[0056] The specific structure of this application includes:

[0057] The body 1 is square, and a receiving cavity 101 is provided inside the body 1. A through hole 102 is provided in the middle of the body 1. The receiving cavity 101 is matched with the through hole 102, so that the slip formed by the square body 1 does not need a turntable, and therefore the external dimensions do not need to be controlled;

[0058] The intermediate body 2 is installed inside the accommodating cavity 101. The intermediate body 2 is used to clamp the drill pipe later. The intermediate body 2 is the middle of the existing slips and is an existing mechanism, which will not be described here;

[0059] The driving mechanism 3 is installed outside the body 1, and the output end of the driving mechanism 3 extends to the inside of the accommodating cavity 101 and is connected to the intermediate body 2. The driving mechanism 3 is specifically placed horizontally, with a part of it installed outside the body 1 and a movable part located inside the accommodating cavity 101, so as to occupy as little space as possible inside the body to avoid affecting the movement of the intermediate body 2;

[0060] A centering mechanism 4 is installed above the body 1, and the end of the centering mechanism 4 corresponds to the through hole 102. The centering mechanism 4 is used to ensure that the drill rod located in the middle of the through hole 102 is centered, so as to facilitate the subsequent clamping of the driving mechanism 3;

[0061] The driving mechanism 3 comprises:

[0062] At least two electric drive units 301 are respectively installed on two sides of the body 1, and the movable ends of the electric drive units 301 are located in the accommodating cavity 101;

[0063] The connecting rod assembly 302 has its two ends respectively connected to the output ends of the electric drive unit 301, and the connecting rod assembly 302 is hinged to the intermediate body 2. The present application realizes the movement of the intermediate body 2 by driving the connecting rod assembly 302 through the electric drive unit 301, thereby realizing the loosening or clamping of the drill rod. Compared with the existing hydraulic cylinder, the position of the hydraulic cylinder can be more accurately controlled, thereby realizing accurate clamping and precise control of the drill rod, and it is also convenient to implement feedback.

[0064] In order to ensure that the driving mechanism 3 can drive the rack to move, thereby driving the intermediate body 2 to move and complete the clamping of the drill rod, because the intermediate body 2 is an existing intermediate body, it includes components such as tooth plates and clamps, which can be driven by the driving mechanism 3 to achieve upward loosening and downward clamping.

[0065] Specifically, the electric drive unit 301 includes:

[0066] The servo motor 303 is installed on the side of the body 1. The servo motor 303 is horizontally arranged. Similarly, the output end of the servo motor 303 is also horizontal, pushing the corresponding rack to move;

[0067] The electric cylinder 304 is connected to the servo motor 303. The servo motor 303 and the electric cylinder 304 cooperate with each other to realize feedback and precise control of the extension and contraction amount of the electric cylinder 304.

[0068] The rack 305 is connected to the piston rod end of the electric cylinder 304. The rack 305 moves along its length direction under the drive of the electric cylinder. Specifically, the movement trajectory of the rack 305 is the length direction of the rack 305. The cooperation with the subsequent connecting rod assembly 302 can realize the movement of the intermediate.

[0069] The movement amplitude of the intermediate body 2 is also related to the position of the rack 305. Therefore, at least two adjustment pads 103 are installed inside the accommodating cavity 101. The adjustment pads 103 correspond to the racks 305 one by one, and the adjustment pads 103 are located below the racks 305. Bolt holes are provided at the ends of the adjustment pads 103, which are connected to the side walls of the intermediate body 2. The rack position can be adjusted by adjusting the position of the adjustment pads 103.

[0070] In order to ensure the synchronous movement of the two electric drive units 301, the present application designs the connecting rod assembly 302 to forcibly adjust the movement of the two electric drive units 301 to the synchronous movement of the connecting rod assembly 302, thereby realizing the movement of the intermediate body.

[0071] Specifically, Figure 2 As shown, the connecting rod assembly 302 includes:

[0072] At least two gears 306 mesh with the racks 305 in a one-to-one correspondence;

[0073] A spline shaft 307, with the gears 306 mounted on both ends of the spline shaft 307;

[0074] At least two driving connecting rods 308 are installed at intervals on the spline shaft 307, and the ends of the driving connecting rods 308 are hinged to the intermediate body 2; the present application drives the electric cylinder 304 to move by the servo motor 303, thereby realizing the horizontal movement of the movable end of the electric cylinder 304, realizing the horizontal movement of the rack 305, and then driving the gear 306 to move, thereby realizing the movement of the driving connecting rod 308, thereby driving the intermediate body 2 to move.

[0075] When the present application is working, in order to ensure the stability of the drill rod clamping, the drill rod needs to be centered by the centering mechanism 4. The centering mechanism 4 described in the present application is at least two, and the centering mechanism 4 is respectively hinged on both sides of the main body 1. The movable end of the centering mechanism 4 faces the through hole 102, that is, when the drill rod extends into the through hole 102, the centering mechanism 4 moves horizontally to complete the centering of the drill rod, which is convenient for subsequent clamping.

[0076] Specifically, the centering mechanism 4 includes:

[0077] A centering shell 401 is hinged to the body 1, and an assembly cavity 402 is provided inside the centering shell 401. The centering shell 401 may be T-shaped or rectangular, and a corresponding subsequent driving mechanism may be assembled inside the assembly cavity 402;

[0078] The centering motor 403 is installed inside the assembly cavity 402. The centering motor 403 is also a servo motor, which facilitates precise control of the movement position of the subsequent centering electric cylinder 404.

[0079] A centering electric cylinder 404 is installed inside the assembly cavity 402, and an output end of the centering electric cylinder 404 faces the through hole 102;

[0080] The centering component 405 is installed at the output end of the centering electric cylinder 404, wherein, specifically, the piston rod of the centering electric cylinder 404 moves in the horizontal direction, that is, the centering component 405 is pushed to complete the centering of the drill pipe, which is convenient for subsequent work.

[0081] Specifically, the centering component 405 includes:

[0082] A centering mounting seat 406 connected to the output end of the centering electric cylinder 404;

[0083] The centering plate 407 is installed on the side of the centering mounting seat 406 facing the through hole 102; the centering component 405 in the present application is specifically driven by the centering electric cylinder 404 to make the centering plate 407 move horizontally toward the through hole 102, thereby completing the clamping of the drill rod.

[0084] Specifically, in order to ensure wear resistance, the centering mechanism 4 also includes a wear-resistant ring 408, which is installed on the side of the centering shell 401 facing the through hole 102, and the wear-resistant ring 408 is located below the centering plate 407. During assembly, the wear-resistant ring 408 is assembled through a wear-resistant ring 408 mounting seat, thereby ensuring the stability of the entire structure.

[0085] When the centering mechanism 4 is in a horizontal position after being flipped, it needs to be locked to facilitate subsequent centering operations, wherein a locking groove 409 is arranged on the outer side of the centering shell 401, and the locking grooves 409 of the two centering shells 401 correspond to each other, and a locking block 410 is arranged inside the locking groove 409; the locking block 410 in the present application is located inside the locking groove 409, and is specifically used to limit the centering shell 401 to ensure the stability of its centering mechanism 4.

[0086] Wherein, the locking block 410 includes:

[0087] A horizontal section 411, wherein the width of the horizontal section 411 is D, and the width of the locking groove 409 is d, d<D≤2d;

[0088] The vertical section 412 is installed on the horizontal section 411 . In the present application, the locking block 410 can lock the centering shell 401 , and the size is designed to ensure that the locking block 410 can be well inserted into the two side-by-side locking grooves 409 .

[0089] Compared with the existing cava, the present application changes the hydraulic cylinder into an electric cylinder, which is convenient for subsequent precise positioning and can more quickly determine whether there is an empty drill; at the same time, the specific setting of the present application can maximize the movement area of ​​the intermediate body.

[0090] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A three-clamp servo-driven electric slip, characterized in that: include The main body is square and has a receiving cavity inside. A through hole is opened in the middle of the main body; An intermediate body installed inside the accommodating cavity; A driving mechanism is installed outside the main body, and an output end of the driving mechanism extends into the accommodating cavity and is connected to the intermediate body; A centering mechanism is installed above the body, and an end of the centering mechanism corresponds to the through hole; The driving mechanism comprises: At least two electric drive units are respectively installed on two sides of the body, and the movable ends of the electric drive units are located in the accommodating cavity; A connecting rod assembly, both ends of which are respectively connected to the output ends of the electric drive unit, and the connecting rod assembly is hinged to the intermediate body; The electric drive unit comprises: A servo motor is installed on the side of the body; An electric cylinder connected to the servo motor; A rack connected to the piston rod end of the electric cylinder, wherein the rack moves along its length direction under the drive of the electric cylinder; At least two adjustment pads are installed inside the accommodating cavity, the adjustment pads correspond to the racks one by one, and the adjustment pads are located below the racks; The connecting rod assembly comprises: At least two gears mesh with the racks in a one-to-one correspondence; A spline shaft, with the gears mounted on both ends of the spline shaft; At least two driving connecting rods are installed on the spline shaft at intervals, and the ends of the driving connecting rods are hinged to the intermediate body.

2. The three-clamp servo-driven electric slip according to claim 1, characterized in that: There are at least two centering mechanisms, and the centering mechanisms are hinged to two sides of the body respectively.

3. The three-clamp servo-driven electric slip according to claim 2, characterized in that: The centering mechanism comprises: A centering shell is hinged to the body, and an assembly cavity is provided inside the centering shell; A centering motor is installed inside the assembly cavity; A centering electric cylinder is installed inside the assembly cavity, and an output end of the centering electric cylinder faces the through hole; The centering component is installed at the output end of the centering electric cylinder.

4. The three-clamp servo-driven electric slip according to claim 3, characterized in that: The centering assembly comprises: A centering mounting seat connected to the output end of the centering electric cylinder; A centering plate is installed on a side of the centering mounting seat facing the through hole.

5. The three-clamp servo-driven electric slip according to claim 4, characterized in that: The centering mechanism further includes a wear-resistant ring, which is installed on a side of the centering shell facing the through hole, and the wear-resistant ring is located below the centering plate.

6. The three-clamp servo-driven electric slip according to claim 3, characterized in that: A locking groove is arranged on the outer side of the centering shell, and the locking grooves of the two centering shells correspond to each other, and a locking block is arranged inside the locking groove.

7. The three-clamp servo-driven electric slip according to claim 6, characterized in that: The locking block comprises: A horizontal section, the width of the horizontal section is D, the width of the locking groove is d, d<D≤2d; The vertical section is installed on the horizontal section.

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