While-drilling reamer for petroleum drilling

Abstract

The utility model relates to the technical field of reamer equipment, and discloses a while-drilling reamer for petroleum drilling, which comprises a reamer main body, the upper surface of the reamer main body is fixedly connected with a top cylinder, the top wall of the inner wall of the top cylinder is slidably connected with a baffle plate, and the bottom wall of the inner wall of the baffle plate is rotatably connected with a pull rod; the sides, close to the inner wall of the top cylinder, of the baffles are fixedly connected with limiting plates, the side faces of the baffles are fixedly connected with the limiting plates, and the ends, away from the baffles, of the baffles are fixedly connected with the limiting plates. The push rod is pushed to drive the push rod to rotate, the push rod rotates to drive the nut to rotate, the nut rotates to move upwards to cancel fixation of the pull rod, at the moment, the limiting plate is pushed to move, the limiting plate moves to drive the baffle to move, and the baffle moves to be extruded in the drilled hole; the limiting plate moves to drive the baffle to move to the original position, and the problem that the edge of the drilled hole collapses is solved to a certain degree.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of reamer equipment, and particularly relates to a reamer for drilling oil. BACKGROUND

[0002] In the process of land and offshore oil and gas drilling and production, the wellbore formed by drilling often encounters the problem of reduced wellbore diameter due to stratum extrusion and other reasons, which leads to the difficulty in continuing the drilling process. Therefore, downhole reaming technology and reamer are developed. The use of the technology and the tool not only solves the problem of reduced hole diameter, but also has great engineering significance. Through the use of the reamer, the wellbore diameter is expanded, which is beneficial to downhole testing and casing operation. Through the downhole reaming technology, small clearance casing programs can be used, thereby optimizing the casing program, reducing the use of casing steel and cement, and reducing the operation cost. The technology can solve the problems of exploration and drilling caused by salt-gypsum layer creep and extrusion. The while-drilling reaming operation is an operation technology for expanding the size of the open hole section to be greater than the inner diameter of the upper casing string while drilling. The while-drilling reaming technology has outstanding advantages in reducing the comprehensive cost of drilling, improving the quality of oil and gas wells, and improving the production capacity of oil and gas wells, and has good market prospects. In the process of oil and gas development and drilling, the drilling depth gradually deepens, and the drilling faces more and more complex wellbore structures and complex stratum structures, and the problems encountered are more and more complex. Due to the instability of the well wall and the extrusion of the stratum, the wellbore diameter is often reduced, which leads to the difficulty in continuing the drilling process and the problem of reduced horizontal wellbore. The conventional method can only perform long-time reaming operation during the drilling process or tripping, so as to achieve the purpose of removing the reduced diameter and repairing the wall. This will consume a large amount of manpower, material resources and time. Therefore, in the prior art, a reamer is needed to perform reaming operation.

[0003] Referring to CN117846503A, a variable-diameter adjusting structure of a while-drilling reamer and the while-drilling reamer, an opening groove is formed in the circumferential direction of the wall of the mounting pipe, and a cutter wing assembly corresponding to the opening groove is mounted in the mounting pipe. A connecting rod is arranged in the mounting pipe in the axial direction of the mounting pipe. At least one end of the connecting rod is sleeved with an extrusion sleeve. The extrusion sleeve is slidable and positionable along the connecting rod. One end of the extrusion sleeve is a large-diameter end, and the other end is a small-diameter end. The diameter of the extrusion sleeve gradually increases from the small-diameter end to the large-diameter end. The small-diameter end is close to the cutter wing assembly. The side wall of the extrusion sleeve abuts against the cutter wing assembly. The cutter wing assembly can move in the radial direction of the mounting pipe to extend to the outside of the mounting pipe through the corresponding opening groove and be positioned by the sliding of the extrusion sleeve. The while-drilling reamer can change the reaming hole diameter during the while-drilling logging process, avoid multiple tripping of the device, and improve the working efficiency and use flexibility.

[0004] However, the following problems still exist. When the device is used for expanding the drilling hole, the edge of the drilling hole is not blocked, which easily leads to the collapse of the edge of the drilling hole and affects the use of the reamer. Utility model content

[0005] The purpose of the present application is: in order to solve the above-mentioned problem that the edge of the hole collapses easily when the device expands the hole, affecting the use of the hole expander, provide a while drilling hole expander for oil drilling.

[0006] The technical scheme adopted by the present application is as follows: a while drilling hole expander for oil drilling, comprising an expander main body, the upper surface of the expander main body is fixedly connected with a top cylinder, the inner wall of the top cylinder is slidably connected with a baffle, the bottom wall of the inner wall of the baffle is rotatably connected with a pull rod, the side of the baffle close to the inner wall of the top cylinder is fixedly connected with a limiting plate, the side of the baffle is fixedly connected with a spring, the end of the spring away from the baffle is fixedly connected with the limiting plate, the surface of the pull rod is fixedly connected with a pull rope, and the end of the pull rope away from the pull rod is fixedly connected with the limiting plate.

[0007] By adopting the above technical scheme, the push handle is first pushed, the push handle drives the push rod to rotate after being pushed, the push rod drives the nut to rotate, the nut cancels the fixation of the pull rod by moving upward, at this time the spring pushes the limiting plate to move, the limiting plate drives the baffle to move, the baffle is extruded in the hole, when not in use, the driving wheel is rotated, the driving wheel is rotated to move the limiting plate by using the pull rod through the pull rope, the limiting plate drives the baffle to move to the original place, which solves the problem of collapse of the edge of the hole to a certain extent.

[0008] In a preferred embodiment, the top end of the pull rod is fixedly connected with a driving wheel.

[0009] By adopting the above technical scheme, by setting the driving wheel, the user can drive the pull rod to rotate, so as to move the limiting plate by using the pull rope.

[0010] In a preferred embodiment, the surface of the pull rod is screwedly connected with a nut, the surface of the nut is fixedly connected with a push rod, and the end of the push rod away from the nut is fixedly connected with a push handle.

[0011] By adopting the above technical scheme, by setting the push handle, the user can drive the push rod to rotate, so as to drive the nut to rotate and cancel the limitation of the pull rod away from the pull rod.

[0012] In a preferred embodiment, the surface of the expander main body is provided with a supporting block, and the lower surface of the expander main body is fixedly connected with a bottom block.

[0013] By adopting the above technical scheme, by setting the supporting block, the supporting block can be pressed on the inner wall of the hole.

[0014] In a preferred embodiment, the number of springs is four, and the four springs are arranged in a rectangular array at the four corners of the baffle.

[0015] By adopting the technical scheme, the four springs can stably push the limiting plate to move and abut against the inner wall of the drilled hole.

[0016] In a preferred embodiment, the surface of the push handle is provided with thread texture.

[0017] By adopting the technical scheme, the thread texture on the surface of the push handle can increase the friction between the palm and the push handle, facilitating the pushing of the push rod.

[0018] In summary, due to the adoption of the technical scheme, the application has the following beneficial effects:

[0019] In the application, the push handle is first pushed, and then the push rod is rotated, the nut is rotated and moved upward to cancel the fixation of the pulling rod, at this time, the limiting plate is moved, the limiting plate is moved to drive the baffle to move, the baffle is extruded in the drilled hole, when not in use, the driving wheel is rotated to drive the pulling rod to move the limiting plate through the pulling rope, the limiting plate is moved to drive the baffle to move to the original position, to a certain extent, the problem of collapse at the edge of the drilled hole is solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the application;

[0021] Figure 2 It is a top view structural schematic diagram of the application;

[0022] Figure 3 It is a top view structural schematic diagram of the application;

[0023] Figure 4 It is a top view structural schematic diagram of the application;

[0024] In the figure, 1 is an underreamer main body; 2 is a support block; 3 is a bottom block; 4 is a top cylinder; 5 is a nut; 6 is a driving wheel; 7 is a push rod; 8 is a push handle; 9 is a baffle; 10 is a pulling rod; 11 is a limiting plate; 12 is a pulling rope; 13 is a spring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely in combination with the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the application.

[0026] Referring to Figures 1-4

[0027] Embodiments:

[0028] Referring to Figures 2-3 A reamer for oil drilling while drilling, comprising a reamer body 1, the upper surface of the reamer body 1 is fixedly connected with a top cylinder 4, the inner wall of the top cylinder 4 is slidably connected with a baffle 9, the bottom wall of the inner wall of the baffle 9 is rotatably connected with a pulling rod 10, the side of the baffle 9 close to the inner wall of the top cylinder 4 is fixedly connected with a limiting plate 11, the side of the baffle 9 is fixedly connected with a spring 13, the end of the spring 13 away from the baffle 9 is fixedly connected with the limiting plate 11, the surface of the pulling rod 10 is fixedly connected with a pulling rope 12, the end of the pulling rope 12 away from the pulling rod 10 is fixedly connected with the limiting plate 11, first push the push handle 8, the push handle 8 drives the push rod 7 to rotate, the push rod 7 drives the nut 5 to rotate, the nut 5 rotates and moves up to cancel the fixation of the pulling rod 10, at this time the spring 13 pushes the limiting plate 11 to move, the limiting plate 11 drives the baffle 9 to move, the baffle 9 moves and is extruded in the borehole, when not in use, rotate the driving wheel 6, the driving wheel 6 rotates and moves the limiting plate 11 by the pulling rod 10 through the pulling rope 12, the limiting plate 11 moves and drives the baffle 9 to move to the original place, to a certain extent, the problem of collapse at the edge of the borehole is solved.

[0029] Referring to Figures 1-3 The top end of the pulling rod 10 is fixedly connected with a driving wheel 6, by setting the driving wheel 6, the user can drive the pulling rod 10 to rotate, so as to move the limiting plate 11 by the pulling rope 12.

[0030] Referring to Figures 1-2 The surface of the pulling rod 10 is screwedly connected with a nut 5, the surface of the nut 5 is fixedly connected with a push rod 7, the end of the push rod 7 away from the nut 5 is fixedly connected with a push handle 8, by setting the push handle 8, the user can drive the push rod 7 to rotate, so as to drive the nut 5 to rotate, and cancel the limitation of the pulling rod 10 away from the pulling rod 10.

[0031] Referring to Figures 2-3 The surface of the reamer body 1 is provided with a supporting block 2, the lower surface of the reamer body 1 is fixedly connected with a bottom block 3, by setting the supporting block 2, the supporting block 2 can be pressed and combined with the inner wall of the borehole.

[0032] Referring to Figures 1-2 The number of the springs 13 is four, and the four springs 13 are arranged in a rectangular array at the four corners of the baffle 9, by setting the four springs 13, the limiting plate 11 can be stably pushed and moved, so as to be abutted against the inner wall of the borehole.

[0033] Referring to Figures 2-3The surface of the push handle 8 is provided with thread texture, and the thread texture on the surface of the push handle 8 can increase the friction between the palm and the push handle 8, so as to facilitate the pushing of the push rod 7.

[0034] The implementation principle of the embodiment of the reamer while drilling for oil drilling is that the push handle 8 is first pushed, the push handle 8 drives the push rod 7 to rotate, the push rod 7 drives the nut 5 to rotate, the nut 5 is moved upward to cancel the fixation on the pull rod 10, at this time, the spring 13 pushes the limiting plate 11 to move, the limiting plate 11 drives the baffle 9 to move, the baffle 9 is extruded in the borehole, when not in use, the rotating driving wheel 6 is rotated to move the limiting plate 11 through the pull rod 10 and the pull rope 12, the limiting plate 11 drives the baffle 9 to move to the original position, and the problem of collapse at the edge of the borehole is solved to a certain extent.

[0035] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A reamer while drilling for oil drilling, comprising a reamer body (1), characterized in that: The upper surface of the reamer body (1) is fixedly connected with a top cylinder (4), the top wall of the inner wall of the top cylinder (4) is slidably connected with the baffle (9), the bottom wall of the inner wall of the baffle (9) is rotatably connected with a pulling rod (10), one side of the baffle (9) close to the inner wall of the top cylinder (4) is fixedly connected with a limiting plate (11), the side of the baffle (9) is fixedly connected with a spring (13), one end of the spring (13) away from the baffle (9) is fixedly connected with the limiting plate (11), the surface of the pulling rod (10) is fixedly connected with a pulling rope (12), one end of the pulling rope (12) away from the pulling rod (10) is fixedly connected with the limiting plate (11) respectively.

2. A reamer while drilling for oil drilling as claimed in claim 1, wherein: The top end of the pulling rod (10) is fixedly connected with a driving wheel (6).

3. A reamer while drilling for oil drilling as claimed in claim 1, wherein: The surface of the pulling rod (10) is threadedly connected with a nut (5), the surface of the nut (5) is fixedly connected with a push rod (7), one end of the push rod (7) away from the nut (5) is fixedly connected with a push handle (8).

4. A reamer while drilling for oil drilling as claimed in claim 1, wherein: The surface of the reamer body (1) is provided with a supporting block (2), and the lower surface of the reamer body (1) is fixedly connected with a bottom block (3).

5. A reamer while drilling for oil drilling as claimed in claim 1, wherein: The number of the spring (13) is four, and the four springs (13) are arranged in a rectangular array at the four corners of the baffle (9).

6. A reamer while drilling for oil drilling as claimed in claim 1, wherein: The surface of the push handle (8) is provided with a threaded texture.

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