Variable-diameter device for rotatably cutting rubber wings of centralizer

Abstract

The utility model discloses a variable diameter rotary cutting centralizer rubber wing device which comprises a rotating assembly, a clamping assembly and a cutting assembly, the cutting assembly is provided with a cutter arranged towards one side of a centralizer body, the cutting assembly is provided with a ruler, the cutter is installed at the end, close to one end of the centralizer body, of the ruler, and the clamping assembly is connected with the cutter. The relative position of the cutter and the centralizer body is adjusted through the scale; the cutting assembly can slide in the axial direction of the rotating assembly. The rotating assembly can rotate around the axis of the clamping assembly. By means of the device, quantitative and regular cutting of the rubber wing of the centralizer can be achieved, the stability of an instrument after the instrument is tripped into a non-magnetic drilling tool is guaranteed, the instrument is more reliable and stable in the working process, and the instrument failure rate caused by vibration is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum drilling auxiliary tools, in particular to a device for rotating and cutting rubber wings of a centralizer with a variable diameter. Background Art

[0002] In the oil drilling industry, the MWD instrument has a component called a stabilizer. After the MWD instrument is lowered into the non-magnetic drill bit, the stabilizer is required to provide a centering and stabilizing function to ensure that the instrument does not shake in the non-magnetic drill bit. When the instrument is working at the bottom of the well at 4,000 to 5,000 meters, the instrument needs to withstand the harsh environment of high temperature, high pressure, and high vibration. Therefore, the role of the stabilizer is particularly important. In actual work, the inner diameter of the non-magnetic drill bit is often different, and the inner diameter of the non-magnetic drill bit of the same model and size is slightly different. Therefore, when the MWD instrument is lowered into the wellhead, the stabilizer rubber wing needs to be cut on site to adapt to the size of the non-magnetic inner diameter to ensure that the instrument is lowered into the non-magnetic drill bit.

[0003] The current situation is that there is no special tool for cutting the rubber wings of the stabilizer. Generally, they are cut by hand using a craft knife, the size is estimated, the cutting amount is based on the feel, and the rubber wings after cutting are not smooth and regular.

[0004] The existing operation mode has the following disadvantages:

[0005] First, the rubber wings of the centralizer may be overcut, resulting in a large gap between the stabilizer and the inner wall of the non-magnetic drill bit after it is lowered, and it cannot fit effectively. This causes the instrument to vibrate too much during operation, which in turn causes vibration damage to the instrument and inaccurate measurements.

[0006] Second: Since the rubber wings are cut irregularly, after being washed by high-temperature, high-pressure mud at the bottom of the well, the rubber wings of the centralizer will be damaged prematurely, greatly reducing the service life of the centralizer.

[0007] Third: It is dangerous to cut the rubber wings with a hand knife, and there is a possibility of cutting your hands, which is not safe.

[0008] Therefore, based on the above technical problems, technicians in this field urgently need to develop a device for rotating and cutting the rubber wings of a stabilizer with a variable diameter. Utility Model Content

[0009] The utility model aims to provide a device for rotating and cutting the rubber wings of a centralizer with a variable diameter. The device has a compact overall structure, meets the requirements of lightweight and miniaturized design, is easy to operate, can quickly and well cut the size of the rubber wings of the centralizer, and can adjust the cutting size according to the cutting requirements.

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] The utility model discloses a device for rotating and cutting the rubber wing of a centralizer with a variable diameter, the device comprising:

[0012] Rotating components;

[0013] Clamping assemblies installed at the upper and lower ends of the rotating assembly, the rotating assembly and the clamping assembly form a cylindrical structure capable of accommodating a centralizer body, and a channel is reserved on one side of the cylindrical structure for the centralizer body to enter and exit;

[0014] A cutting assembly is installed on the rotating assembly, the cutting assembly has a cutter arranged toward one side of the centralizer body, and the cutting assembly is provided with a ruler, the cutter is installed at an end of the ruler close to one end of the centralizer body, and the relative position of the cutter and the centralizer body is adjusted by the ruler;

[0015] The cutting assembly is capable of sliding along the axial direction of the rotating assembly;

[0016] The rotating assembly is rotatable about an axis of the clamping assembly.

[0017] Furthermore, the clamping assembly comprises:

[0018] A clamping assembly main body shell, wherein the clamping assembly main body shell is annular, and one side of the clamping assembly main body shell has a notch, and the notch is configured as the channel; and

[0019] Three positioning blocks integrated into the main body shell of the clamping assembly, wherein the three positioning blocks are evenly distributed along the circumference of the main body shell of the clamping assembly;

[0020] The clamping assembly maintains the position of the centralizer body through the three positioning blocks.

[0021] Furthermore, the three positioning blocks are respectively:

[0022] A fixed positioning block fixed to the inner wall of the clamping assembly main body shell and relative to the position of the notch;

[0023] Slider type positioning blocks and spring latch type positioning blocks symmetrically arranged on both sides of the fixed positioning block;

[0024] The slider type positioning block and the spring latch type positioning block can both move radially along the main body shell of the clamping assembly to adjust their positions relative to the centralizer body.

[0025] Furthermore, an operating rod is provided outside the slider type positioning block, a first sliding rod passing through the main body shell of the clamping assembly is connected to the operating rod, and a spring is provided at the position where the first sliding rod is connected to the main body shell of the clamping assembly;

[0026] The spring latch type positioning block is provided with a second sliding rod passing through the clamping assembly main body shell along the radial direction of the clamping assembly main body shell, and a latch is passed through the upper part of the clamping assembly main body shell, and the second sliding rod has a socket that cooperates with the latch.

[0027] Furthermore, the rotating assembly includes:

[0028] annular sliders located at the upper and lower ends of the rotating assembly, the clamping assembly main body shell is provided with an annular groove matched with the annular slider, the annular slider is slidably connected in the annular groove, and one side of the annular slider has a notch; and

[0029] Four supporting round steel bars installed between the two annular sliders;

[0030] Two of the supporting round steels are symmetrically installed on both sides of the notch, and the other two supporting round steels are installed on the side of the annular sliding block away from the notch.

[0031] Furthermore, the cutting assembly comprises:

[0032] A cutting assembly mounting frame, wherein both ends of the cutting assembly mounting frame have handles extending outward;

[0033] A ruler disposed at a middle position of the cutting assembly mounting frame; and

[0034] the tool;

[0035] The cutting assembly mounting frame is provided with a cylindrical pin for locking the ruler.

[0036] Furthermore, sliding holes are provided at both ends of the cutting assembly mounting frame, the cutting assembly mounting frame is slidably connected to two supporting round steels away from the notch, and the cutting assembly can slide axially along the supporting round steels.

[0037] Furthermore, a long return spring is provided at the lower end of the cutting assembly mounting frame, and the long return spring is sleeved on the supporting round steel.

[0038] In the above technical solution, the utility model provides a device for rotating and cutting the rubber wing of a centralizer with a variable diameter, which has the following beneficial effects:

[0039] The device of the utility model can realize quantitative and regular cutting of the rubber wing of the centralizer, ensure the stability of the instrument after the non-magnetic drilling tool is lowered, make the instrument more reliable and stable during operation, and reduce the failure rate of the instrument caused by vibration.

[0040] The device of the utility model effectively reduces the damage to the centralizer caused by mud scouring through regular cutting, prolongs the service life of the centralizer, avoids bare-hand contact with the cutter, and is safer.

[0041] The device of the utility model can be used as a standard special matching tool for MWD instruments, can be fully promoted and used in the directional well industry, has broad application prospects and huge demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0043] Figure 1 It is a schematic structural diagram of a device for rotating and cutting the rubber wing of a centralizer with a variable diameter disclosed in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the structure of a clamping assembly of a device for rotating and cutting the rubber wing of a centralizer with a variable diameter disclosed in an embodiment of the present application Figure 1 ;

[0045] Figure 3 A schematic diagram of the structure of a clamping assembly of a device for rotating and cutting the rubber wing of a centralizer with a variable diameter disclosed in an embodiment of the present application Figure 2 ;

[0046] Figure 4 A cross-sectional view of a clamping assembly of a device for rotating and cutting rubber wings of a centralizer with a variable diameter disclosed in an embodiment of the present application;

[0047] Figure 5 It is a schematic structural diagram of a rotating assembly of a device for rotating and cutting the rubber wing of a centralizer with a variable diameter disclosed in an embodiment of the present application;

[0048] Figure 6 It is a structural schematic diagram of a cutting assembly of a device for variable diameter rotary cutting of a stabilizer rubber wing disclosed in an embodiment of the present application.

[0049] Description of reference numerals:

[0050] 1. Clamping assembly; 2. Rotating assembly; 3. Cutting assembly; 4. Centralizer body;

[0051] 101. Clamping assembly main body housing; 102. Fixed positioning block; 103. Spring latch positioning block; 104. Slider positioning block; 105. Ring groove; 106. Spring steel ball;

[0052] 10301, second sliding rod; 10302, latch; 10303, socket;

[0053] 10401, first sliding rod;

[0054] 201, annular slider; 202, supporting round steel; 203, long return spring;

[0055] 301, cutting assembly mounting frame; 302, handle; 303, ruler; 304, tool; 305, cylindrical pin; 306, sliding hole. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0057] See also Figures 1 to 6 As shown;

[0058] This embodiment discloses a device for cutting the rubber wing of a centralizer with a variable diameter and a rotary cutting device, the device comprising:

[0059] Rotating assembly 2;

[0060] The clamping assembly 1 is installed at the upper and lower ends of the rotating assembly 2. The rotating assembly 2 and the clamping assembly 1 form a cylindrical structure capable of accommodating the centralizer body 4, and a channel is reserved on one side of the cylindrical structure for the centralizer body 4 to enter and exit;

[0061] The rotating assembly 2 is provided with a cutting assembly 3, the cutting assembly 3 having a cutter 304 arranged toward one side of the centralizer body 4, and the cutting assembly 3 is provided with a scale 303, the cutter 304 is installed at the end of the scale 303 close to one end of the centralizer body 4, and the relative position of the cutter 304 and the centralizer body 4 is adjusted by the scale 303;

[0062] The cutting assembly 3 can slide along the axial direction of the rotating assembly 2;

[0063] The rotating assembly 2 can rotate around the axis of the clamping assembly 1 .

[0064] Specifically, the present embodiment discloses a device for cutting the rubber wings of a centralizer with a variable diameter and rotation, and the device includes three components, namely a clamping component 1, a rotating component 2 and a cutting component 3; two clamping components 3 are arranged at both ends of the rotating component 2, and the cutting component 3 is slidably connected to the rotating component 2, and the cutting component 3 can slide along the rotating component 2 to complete the cutting action. The clamping component 1 of the present embodiment realizes the positioning and centering of the centralizer body 4 through the positioning block, and maintains the position of the centralizer body 4, and the rotating component 2 can drive the cutting component 3 to rotate to realize the cutting of the rubber wings at different positions of the centralizer body 4.

[0065] Preferably, the clamping assembly 1 of this embodiment includes:

[0066] A clamping assembly main body shell 101, wherein the clamping assembly main body shell 101 is annular, and a notch is provided on one side of the clamping assembly main body shell 101, and the notch is configured as a channel; and

[0067] Three positioning blocks integrated into the clamping assembly main body shell 101, the three positioning blocks are evenly distributed along the circumference of the clamping assembly main body shell 101;

[0068] The clamping assembly holds the position of the centralizer body 4 through three positioning blocks.

[0069] Among them, the three positioning blocks of this embodiment are:

[0070] A fixed positioning block 102 fixed to the inner wall of the clamping assembly main body housing 101 and relative to the position of the notch;

[0071] A slider type positioning block 104 and a spring latch type positioning block 103 symmetrically arranged on both sides of the fixed positioning block 102;

[0072] Both the slider type positioning block 104 and the spring latch type positioning block 103 can move along the radial direction of the clamping assembly main body shell 101 to adjust the position with respect to the centralizer body 4 .

[0073] This embodiment further defines the structure of the clamping assembly 1, which takes the clamping assembly main body shell 101 as the main structure, and sets three positioning blocks along the circumference of the clamping assembly main body shell 101. The positioning blocks cooperate with the centralizer body 4 at one end, and the arc matches the outer wall of the centralizer body 4.

[0074] More preferably, the slider type positioning block 104 of this embodiment is provided with an operating rod on the outside, and a first sliding rod 10401 passing through the clamping assembly main body shell 101 is connected to the operating rod, and a spring is provided at the position where the first sliding rod 10401 is connected to the clamping assembly main body shell 101;

[0075] The spring latch type positioning block 103 is provided with a second sliding rod 10301 which passes through the clamping assembly main body shell 101 along the radial direction of the clamping assembly main body shell 101, and a latch 10302 is passed through the upper part of the clamping assembly main body shell 101, and the second sliding rod 10301 has a socket 10303 which cooperates with the latch 10302.

[0076] This embodiment further defines the structure of the slider type positioning block 104 and the spring latch type positioning block 103. The rear side of the centralizer body 4 is supported and positioned by the fixed positioning block 102, and the two sides are symmetrically positioned by the slider type positioning block 104 and the spring latch type positioning block 103. After the second sliding rod 10301 of the spring latch type positioning block 103 is moved to the specified position, the latch 10302 is inserted into the socket 10303 to achieve positioning and fixation. At the same time, the slider type positioning block 104 can be operated to abut against the outer wall of the centralizer body 4.

[0077] Preferably, the rotating assembly 2 of this embodiment includes:

[0078] The annular slider 201 is located at the upper and lower ends of the rotating assembly 2, and the clamping assembly main body shell 101 is provided with an annular groove 105 that matches the annular slider 201. The annular slider 201 is slidably connected in the annular groove 105, and one side of the annular slider 201 has a notch; and

[0079] Four supporting round steel bars 202 installed between two annular sliders 201;

[0080] Two of the supporting round steels 202 are symmetrically installed on both sides of the notch, and the other two supporting round steels 202 are installed on the side of the annular slider 201 away from the notch.

[0081] Secondly, this embodiment further defines the structure of the rotating assembly 2, which includes an annular slider 201, which can slide in the annular groove of the clamping assembly main body shell 101. At the same time, in order to reduce the friction resistance during rotation, multiple spring steel balls 106 are arranged in the annular groove 105 to assist the rotation. Four supporting round steels 202 are connected between the two annular sliders 201, and the notched part is avoided during manufacturing to ensure that the centralizer body 4 can smoothly enter and exit the device.

[0082] Preferably, the cutting assembly 3 of this embodiment includes:

[0083] A cutting assembly mounting frame 301, with handles 302 extending outward at both ends of the cutting assembly mounting frame 301;

[0084] A scale 303 disposed in the middle of the cutting assembly mounting frame 301; and

[0085] Tool 304;

[0086] A cylindrical pin 305 for locking the scale 303 is provided on the cutting assembly mounting frame 301 .

[0087] In this embodiment, sliding holes 306 are provided at both ends of the cutting assembly mounting frame 301 , and the cutting assembly mounting frame 301 is slidably connected to two supporting round steels 202 away from the notch, and the cutting assembly 3 can slide axially along the supporting round steels 202 .

[0088] In order to realize the automatic return of the cutting assembly 3 after cutting, a long return spring 203 is provided at the lower end of the cutting assembly mounting frame 301 of the present embodiment, and the long return spring 203 is sleeved on the supporting round steel 202 .

[0089] This embodiment further defines the structure of the cutting assembly 3, which is based on a cutting assembly mounting frame 301, with handles 302 provided on both sides for easy operation, and a scale 303 installed in the middle that can move radially along the stabilizer body 4 to adjust the position, and a tool 304 installed at the end of the scale 303.

[0090] When in use, first return the rotating assembly 2 to its position so that the notch is aligned so that the device can be installed on the stabilizer body 4 from the side. After the device of this embodiment is pressed against the stabilizer body 4 by the fixed positioning block 102, the spring pin positioning block 103 is pressed and positioned, and then the slider positioning block 104 on the right is manually tightened to complete the positioning operation. The clamping assembly 1 at the upper and lower ends is operated in the same way. Then, fix and adjust the position of the ruler 303, adjust the tool 304 to the position corresponding to the required diameter, lock the cylindrical pin 305, lock the ruler 303, and then hold the handles 302 on both sides to cut the stabilizer rubber wing up and down. After completing the cutting of a rubber wing, release the cutting assembly 3 to achieve automatic return under the action of the return long spring 203. Then the rotating assembly 2 drives the cutting assembly 3 to rotate 120°, and the next rubber wing can be aligned for cutting. After the complete cutting is completed, return the rotating assembly 2 to its position, release the positioning block to complete the unlocking operation, and remove the device.

[0091] In the above technical solution, the utility model provides a device for rotating and cutting the rubber wing of a centralizer with a variable diameter, which has the following beneficial effects:

[0092] The device of the utility model can realize quantitative and regular cutting of the rubber wing of the centralizer, ensure the stability of the instrument after the non-magnetic drilling tool is lowered, make the instrument more reliable and stable during operation, and reduce the failure rate of the instrument caused by vibration.

[0093] The device of the utility model effectively reduces the damage to the centralizer caused by mud scouring through regular cutting, prolongs the service life of the centralizer, avoids bare-hand contact with the cutter, and is safer.

[0094] The device of the utility model can be used as a standard special matching tool for MWD instruments, can be fully promoted and used in the directional well industry, has broad application prospects and huge demand.

[0095] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for cutting the rubber wing of a centralizer with a variable diameter and rotation, characterized in that: The device comprises: Rotating assembly (2); A clamping assembly (1) installed at the upper and lower ends of the rotating assembly (2), wherein the rotating assembly (2) and the clamping assembly (1) form a cylindrical structure capable of accommodating a centralizer body (4), and a channel is reserved on one side of the cylindrical structure for the centralizer body (4) to enter and exit; The rotating assembly (2) is provided with a cutting assembly (3), the cutting assembly (3) having a cutter (304) arranged toward one side of the centralizer body (4), and the cutting assembly (3) is provided with a ruler (303), the cutter (304) being installed at an end of the ruler (303) close to one end of the centralizer body (4), and the relative position of the cutter (304) and the centralizer body (4) is adjusted by the ruler (303); The cutting component (3) is capable of sliding along the axial direction of the rotating component (2); The rotating assembly (2) is capable of rotating around the axis of the clamping assembly (1).

2. The device for cutting the rubber wing of a centralizer with a variable diameter and a rotary cutting device according to claim 1, characterized in that: The clamping assembly (1) comprises: A clamping assembly main body shell (101), wherein the clamping assembly main body shell (101) is in a circular ring shape, and one side of the clamping assembly main body shell (101) has a notch, and the notch is configured as the channel; and Three positioning blocks integrated in the clamping assembly main body shell (101), the three positioning blocks being evenly distributed along the circumference of the clamping assembly main body shell (101); The clamping assembly (1) maintains the position of the centralizer body (4) via the three positioning blocks.

3. The device for cutting the rubber wing of a centralizer with a variable diameter and a rotary motion according to claim 2, characterized in that: The three positioning blocks are respectively: A fixed positioning block (102) fixed to the inner wall of the clamping assembly main body shell (101) and located relative to the notch; A sliding block (104) and a spring latch block (103) symmetrically arranged on both sides of the fixed block (102); The slider-type positioning block (104) and the spring latch-type positioning block (103) are both capable of moving radially along the clamping assembly main body shell (101) to adjust their positions relative to the centralizer body (4).

4. The device for cutting the rubber wing of a centralizer with a variable diameter and a rotary cutting device according to claim 3, characterized in that: An operating rod is arranged outside the slider type positioning block (104), and a first sliding rod (10401) passing through the clamping assembly main body shell (101) is connected to the operating rod, and a spring is arranged at the position where the first sliding rod (10401) is connected to the clamping assembly main body shell (101); The spring latch type positioning block (103) is provided with a second sliding rod (10301) passing through the clamping assembly main body shell (101) along the radial direction of the clamping assembly main body shell (101), and a latch (10302) is passed through the upper part of the clamping assembly main body shell (101), and the second sliding rod (10301) has a socket (10303) cooperating with the latch (10302).

5. The device for cutting the rubber wing of a centralizer with a variable diameter and a rotary motion according to claim 2, characterized in that: The rotating assembly (2) comprises: annular sliders (201) located at the upper and lower ends of the rotating assembly (2); the clamping assembly main body shell (101) is provided with an annular groove (105) cooperating with the annular slider (201); the annular slider (201) is slidably connected in the annular groove (105); and one side of the annular slider (201) has a notch; and Four supporting round steel bars (202) installed between the two annular sliding blocks (201); Two of the supporting round steels (202) are symmetrically installed on both sides of the notch, and the other two supporting round steels (202) are installed on the side of the annular slider (201) away from the notch.

6. The device for cutting the rubber wing of a centralizer with a variable diameter and a rotary motion according to claim 5, characterized in that: The cutting assembly (3) comprises: A cutting assembly mounting frame (301), wherein both ends of the cutting assembly mounting frame (301) are provided with handles (302) extending outwards; A scale (303) disposed at a middle position of the cutting assembly mounting frame (301); and The tool (304); The cutting assembly mounting frame (301) is provided with a cylindrical pin (305) for locking the scale (303).

7. The device for cutting the rubber wing of a centralizer with a variable diameter and a rotary motion according to claim 6, characterized in that: Sliding holes (306) are provided at the two ends of the cutting assembly mounting frame (301), and the cutting assembly mounting frame (301) is slidably connected to two supporting round steels (202) away from the notch, and the cutting assembly (3) can slide axially along the supporting round steels (202).

8. The device for cutting the rubber wing of a centralizer with a variable diameter and a rotary motion according to claim 7, characterized in that: A long return spring (203) is provided at the lower end of the cutting assembly mounting frame (301), and the long return spring (203) is sleeved on the supporting round steel (202).

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