Drill rod righting mechanism

Abstract

The utility model discloses a drill rod centralizing mechanism which comprises a centralizer frame body and a centralizer handrail arranged on the centralizer frame body, the centralizer handrail drives two sets of connecting rod mechanisms through an oil cylinder to drive the centralizer handrail to be opened or closed, and the drill rod centralizing mechanism further comprises a V-shaped frame assembly which comprises a V-shaped frame and a connecting rod assembly which is arranged on the top face of the centralizer frame body. The two side faces, facing the drill rod, of the V-shaped frame are each rotationally provided with a rear rolling wheel. A front roller is rotationally arranged on the centralizer handrail, and the rotating axis of the front roller and the rotating axis of the rear roller are perpendicular to the axis of the drill rod. The drill rod can drive the front roller and the rear roller to rotate when moving up and down, so that friction force between the rollers and the outer surface of the drill rod is reduced, and the service life of the rollers is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, specifically to a drill pipe straightening mechanism. Background Technology

[0002] The drill pipe alignment mechanism is used to align the drill pipe with the power head during drilling and unscrewing, thereby improving the efficiency and automation of drilling and unscrewing.

[0003] Chinese invention patent CN111287675B discloses a drill pipe straightener, including a lower support structure and an upper support structure. The lower support structure consists of several lower rollers set on the top surface of the support; the upper support structure consists of several upper rollers set on the end of a rocker arm. The middle part of the rocker arm rotates around the support as a fulcrum, and the other end of the rocker arm is hinged to both sides of the support through a connecting rod. A lifting drive mechanism is set at the bottom of the support, which drives the connecting rod and the rocker arm to move progressively, opening or closing the upper support structure and the lower support structure.

[0004] However, the drill pipe moves up and down during the attaching and unattaching process. In the above solution, the axes of the lower and upper rollers are parallel to the axis of the drill pipe. The rollers rotate in the horizontal plane. When the drill pipe moves up and down, it will generate a lot of friction with the lower and upper rollers. The lower and upper rollers wear out quickly and have a short service life. Utility Model Content

[0005] To address the aforementioned shortcomings, the technical problem to be solved by this utility model is to provide a drill pipe straightening mechanism, thereby solving the problem of rapid wear and short service life of the lower and upper rollers of the drill pipe straightening device in the prior art.

[0006] Therefore, this application provides a drill pipe straightening mechanism, including a straightener frame and a straightener handle mounted on the straightener frame. The straightener handle is driven to open or close by a hydraulic cylinder driving two sets of linkage mechanisms. The mechanism also includes:

[0007] The V-frame assembly includes a V-frame disposed on the top surface of the stabilizer frame, and rear rollers are rotatably disposed on the two sides of the V-frame facing the drill rod.

[0008] The stabilizer handle is rotatably equipped with a front roller, and the rotation axes of the front roller and the rear roller are perpendicular to the axes of the respective drill rods.

[0009] Based on the above technical solution, the rotation axes of the front roller and the rear roller are set perpendicular to the axes of the respective drill rods. When the drill rod moves up and down, it can drive the front roller and the rear roller to rotate, thus reducing the friction between the rollers and the outer surface of the drill rod and extending the service life of the rollers.

[0010] In the above technical solution, preferably, the two sets of linkage mechanisms are arranged in the body of the stabilizer frame and symmetrically arranged along the center line of the stabilizer frame. The linkage mechanism includes a front linkage and a rear linkage. One end of the front linkage and the rear linkage are hinged together. The stabilizer handrail is fixed to the front end of the front linkage. The rear end of the rear linkage is hinged to the piston rod of the hydraulic cylinder.

[0011] In the above technical solution, preferably, the V-shaped frame is fixed to the slide plate, and the slide plate has an elongated hole along the longitudinal direction of the stabilizer frame. Bolts pass through the elongated hole to fix the V-shaped frame to the top surface of the stabilizer frame. The rear end of the V-shaped frame has an upwardly bent plate, which is fixedly connected to the stabilizer frame by adjusting bolts. The V-shaped frame can be adjusted to accommodate drill rods of different diameters and models, thus having a wide range of applications.

[0012] In the above technical solution, preferably, the front roller is fitted onto the armrest of the stabilizer, and a baffle is provided on the front end face of the armrest of the stabilizer.

[0013] In the above technical solution, preferably, two spaced-apart fixing plates are fixedly installed on the side of the V-shaped frame facing the drill rod, the rear roller is disposed between the two fixing plates, and the rotating shaft passes through the fixing plates and the rear roller and is fixed by nuts.

[0014] Both the front and rear rollers are designed to be detachable, facilitating replacement after wear and reducing maintenance costs.

[0015] In the above technical solution, preferably, the front roller and the rear roller are made of nylon plastic, which can effectively protect the outer surface of the drill rod.

[0016] In the above technical solution, preferably, the straightener frame includes an upper cover plate and a lower cover plate arranged opposite to each other, and the linkage mechanism is arranged between the upper cover plate and the lower cover plate.

[0017] In the above technical solution, preferably, the hydraulic cylinder is located at the rear end of the straightener frame.

[0018] As can be seen from the above technical solution, the drill pipe straightening mechanism provided by this utility model solves the problems of rapid roller wear and short service life in existing technologies. Compared with the prior art, this utility model has the following beneficial effects:

[0019] The V-frame assembly includes a V-frame with rear rollers rotatably mounted on both sides of the V-frame facing the drill pipe, and a front roller rotatably mounted on the centralizer handle. The rotation axes of the front and rear rollers are perpendicular to the axes of the respective drill pipes. Therefore, when the drill pipe is disassembled and moved up and down, the front and rear rollers rotate, thus reducing the friction between the rollers and the outer surface of the drill pipe and extending the service life of the rollers. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced and explained below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the drill pipe straightening mechanism provided by this utility model;

[0022] Figure 2 for Figure 1 Top view (partial section) of the drill pipe straightening mechanism shown.

[0023] Figures 1-2 The correspondence between the parts is as follows:

[0024] Drill pipe 100;

[0025] 10. Centralizer frame, 20. Centralizer handrail, 30. V-shaped frame assembly, 40. Hydraulic cylinder, 50. Linkage mechanism;

[0026] Upper cover plate 11, lower cover plate 12;

[0027] Front roller 21;

[0028] V-shaped frame 31, rear roller 32, slide plate 33, elongated hole 34, bolt 35, bending plate 36, adjusting bolt 37, fixing plate 38;

[0029] Front link 51, rear link 52. Detailed Implementation

[0030] This invention provides a drill pipe alignment mechanism that automatically aligns the drill pipe with the power head on the same center line during drilling and unscrewing, thereby facilitating accurate screw-on connection between the power head and the drill pipe. The rotation axes of the front and rear rollers are perpendicular to the axis of the drill pipe. When the drill pipe moves up and down, it drives the front and rear rollers to rotate, thus reducing friction between the rollers and the outer surface of the drill pipe and extending the service life of the rollers.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] To provide a clearer explanation and description of the technical solution and implementation of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below.

[0033] It should be noted that the directional terms such as "inner" and "outer", "front" and "back" and "left" and "right" in this article are based on the product's usage status. Obviously, the use of these directional terms does not limit the scope of protection of this solution.

[0034] like Figure 1 , Figure 2 As shown, the present invention provides a drill pipe straightening mechanism, including a straightening frame 10 and a straightening handle 20 and a V-shaped frame assembly 30 disposed on the straightening frame 10. The straightening handle 20 and the V-shaped frame assembly 30 are used to straighten the drill pipe 100. The straightening handle 20 is driven by a hydraulic cylinder 40 to open or close two sets of linkage mechanisms 50.

[0035] A front roller 21 is rotatably mounted on the centralizer handle 20. The V-frame assembly 30 includes a V-frame 31, with rear rollers 32 rotatably mounted on each of the two sides of the V-frame 31 facing the drill rod 100. The rotation axes of the front roller 21 and the rear rollers 32 are perpendicular to the axes of the drill rod 100. Therefore, when the drill rod 100 moves up and down, the front roller 21 and the rear rollers 32 can rotate under the friction of the drill rod 100, reducing the friction between the drill rod 100 and the front roller 21 and the rear rollers 32, thus extending their service life.

[0036] The centralizer frame 10 includes an upper cover plate 11 and a lower cover plate 12 arranged opposite each other. A linkage mechanism 50 is disposed between the upper cover plate 11 and the lower cover plate 12, and a hydraulic cylinder 40 is disposed at the rear end of the centralizer frame 10.

[0037] Two sets of linkage mechanisms 50 are symmetrically arranged along the centerline of the centralizer frame 10. The linkage mechanism 50 includes a front linkage 51 and a rear linkage 52, which are arranged between the upper cover plate 11 and the lower cover plate 12. One end of the front linkage 51 and the rear linkage 52 are hinged together. The centralizer handle 20 is fixed to the front end of the front linkage 51, and the rear end of the rear linkage 52 is hinged to the piston rod of the hydraulic cylinder 40.

[0038] The V-shaped frame assembly 30 is disposed on the top surface of the stabilizer frame 10, specifically on the top surface of the upper cover plate 11. The V-shaped frame 31 is fixed to the slide plate 33, which has an elongated hole 34 along the longitudinal direction of the stabilizer frame 10. Bolts 35 pass through the elongated hole 34 to fix the V-shaped frame 31 to the top surface of the stabilizer frame 10. The rear end of the V-shaped frame 31 has an upwardly bent plate 36, which is fixedly connected to the stabilizer frame 10 by adjusting bolts 37. By loosening the bolts 35, the V-shaped frame 31 can be moved back and forth by adjusting the bolts 37 and then fixed again by bolts 35, thus allowing the V-shaped frame 31 to adapt to various drill rods 100 of different diameters.

[0039] Both the front roller 21 and the rear roller 32 are detachable. Specifically, the front roller 21 is mounted on the centralizer handle 20, and the front end face of the centralizer handle 20 is provided with a detachable baffle for limiting movement. Two spaced-apart fixing plates 38 are fixedly installed on the side of the V-frame 31 facing the drill pipe 100, and the rear roller 32 is positioned between the two fixing plates 38. The rotating shaft passes through the fixing plates and the rear roller 32 and is fixed by a nut.

[0040] In this utility model, the front roller 21 and the rear roller 32 are made of nylon plastic, which can avoid damaging the surface of the drill rod 100. At the same time, both the front roller 21 and the rear roller 32 adopt a detachable structure, which can be easily replaced after damage as vulnerable parts.

[0041] The drill pipe straightening mechanism provided by this utility model is used as follows:

[0042] When performing drill pipe straightening operation, the piston rod of the hydraulic cylinder 40 extends forward, driving the rear connecting rod 52 and the front connecting rod 51 to rotate the two straightener handles 20 inward and close them respectively. The front roller 21 presses the drill pipe 100 onto the rear roller 32, locking the drill pipe 100.

[0043] After the drill rod 100 is disassembled and assembled, the piston rod of the hydraulic cylinder 40 retracts backward, driving the rear connecting rod 52 and the front connecting rod 51 to rotate and open the two centralizer handles 20 in opposite directions, thus releasing the drill rod 100.

[0044] Based on the above description of specific embodiments, the drill pipe straightening mechanism provided by this utility model has the following advantages compared with the prior art:

[0045] First, the rotation axes of the front and rear rollers are set perpendicular to the axis of the drill rod. When the drill rod moves up and down, the front and rear rollers can rotate under the action of the drill rod's friction, thereby reducing the friction between the drill rod and the front and rear rollers and extending their service life.

[0046] Secondly, the V-shaped frame assembly is fixed to the top surface of the stabilizer frame by bolts passing through the elongated holes, and can be adjusted toward or away from the drill rod, thus adapting to various drill rods of different diameters.

[0047] Third, the front and rear rollers are made of nylon plastic, which can prevent damage to the drill pipe surface. In addition, both the front and rear rollers adopt a detachable structure, which can be easily replaced after damage, reducing maintenance costs.

[0048] Finally, it should be noted that the terms "comprising," "including," or any other variations thereof as used herein are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a…" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] This utility model is not limited to the above-described preferred embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model.

Claims

1. A drill pipe centralizing mechanism comprising a centralizer carrier body and a centralizer handrail provided on the centralizer carrier body, the centralizer handrail being driven to open or close by two groups of link mechanisms driven by an oil cylinder, characterized in that, Also includes: The V-frame assembly includes a V-frame disposed on the top surface of the stabilizer frame, and rear rollers are rotatably disposed on the two sides of the V-frame facing the drill rod. The stabilizer handle is rotatably equipped with a front roller, and the rotation axes of the front roller and the rear roller are perpendicular to the axes of the respective drill rods.

2. The drill rod centralizing mechanism of claim 1, wherein, The two sets of linkage mechanisms are arranged symmetrically along the centerline of the centralizer frame. The linkage mechanism includes a front linkage and a rear linkage. One end of the front linkage is hinged to the rear linkage. The centralizer handrail is fixed to the front end of the front linkage. The rear end of the rear linkage is hinged to the piston rod of the hydraulic cylinder.

3. The drill rod centralizing mechanism of claim 1 wherein, The V-shaped frame is fixed on the slide plate, and the slide plate has an elongated hole along the longitudinal direction of the stabilizer frame. Bolts pass through the elongated hole to fix the V-shaped frame to the top surface of the stabilizer frame. The rear end of the V-shaped frame has an upwardly bent plate, and the bent plate is fixedly connected to the stabilizer frame by adjusting bolts.

4. The drill rod centralizing mechanism of claim 1 wherein, The front roller is fitted onto the armrest of the centralizer, and a baffle is provided on the front end face of the armrest of the centralizer.

5. The drill rod centralizing mechanism of claim 1 wherein, Two spaced-apart fixing plates are fixedly installed on the side of the V-shaped frame facing the drill rod. The rear roller is positioned between the two fixing plates, and the rotating shaft passes through the fixing plates and the rear roller and is fixed by a nut.

6. The drill rod centralizing mechanism of claim 1 wherein, The front roller and the rear roller are made of nylon plastic.

7. The drill rod centralizing mechanism of claim 1 wherein, The straightener frame includes an upper cover plate and a lower cover plate arranged opposite each other, and the linkage mechanism is arranged between the upper cover plate and the lower cover plate.

8. The drill rod centralizing mechanism of claim 1 wherein, The hydraulic cylinder is located at the rear end of the centralizer frame.

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