Variable-diameter stabilizer

Abstract

The utility model provides a variable-diameter stabilizer, and relates to the field of variable-diameter stabilizers, the variable-diameter stabilizer comprises a variable-diameter stabilizer body, one end of the variable-diameter stabilizer body is provided with a centralizing block assembly, and the centralizing block assembly is used for centralizing a drilling tool. The centralizing block assembly comprises a main shaft, a sliding sleeve, a supporting arm, a centralizing piece, a reset spring, a limiting ring, an adjusting nut, an external thread and a limiting block. According to the variable-diameter stabilizer, the connecting assembly is arranged, the effect of conveniently connecting the variable-diameter stabilizer body and the centralizing block assembly is achieved, so that the variable-diameter stabilizer body and the centralizing block assembly can be conveniently disassembled and replaced, and the centralizing block assembly is arranged, so that the effect of changing the use diameter of a centralizing block is achieved; through cooperation of the sliding sleeve, the supporting arm, the centralizing piece, the reset spring, the limiting ring, the adjusting nut, the external thread and the limiting block, the centralizing block has the telescopic function, stretching of the centralizing block can be achieved, the centralizing block can adapt to different borehole sizes and drilling tool diameters, and therefore the better stabilizing effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of variable diameter stabilizers, in particular to a variable diameter stabilizer. Background Art

[0002] The variable diameter stabilizer is a tool used to maintain the stability of the drill bit during the drilling process. Its main function is to adapt to different wellbore sizes by changing its own diameter, thereby maintaining the stability and reliability of the drill bit during the drilling process. The variable diameter stabilizer mainly consists of a power part, a diameter-changing part, and a straightening part.

[0003] The main function of the centralizing block is to help maintain the center position of the drill tool during the drilling process to prevent it from deviating from the predetermined drilling route. The stable drill tool position can improve drilling efficiency and reduce repeated drilling and correction work caused by drill tool deviation. However, the centralizing blocks of the variable diameter stabilizer in the existing technology are mostly fixed in size, which makes it impossible to adapt to different wellbore sizes and drill tool diameters during the drilling process, thereby reducing the flexibility of the variable diameter stabilizer.

[0004] In summary, the present invention provides a variable diameter stabilizer to solve the above problems. Utility Model Content

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The adjustable diameter stabilizer comprises a adjustable diameter stabilizer body, one end of the adjustable diameter stabilizer body is installed with a straightening block assembly, the straightening block assembly is used to straighten the drilling tool, the straightening block assembly comprises a main shaft, a sliding sleeve, a support arm, a straightening plate, a return spring, a limit ring, an adjusting nut, an external thread, and a limit block. The sliding sleeve, support arm, straightening plate, return spring, limit ring, adjusting nut, external thread and limit block are each provided in two groups and are evenly distributed at both ends of the main shaft surface, one end of the support arm is movably connected to the sliding sleeve by a movable pin, and the support arms at both ends are movably connected by a movable pin, the straightening plate is installed on the surface of the support arm, and a connecting assembly is installed between the adjustable diameter stabilizer body and the straightening block assembly, and the connecting assembly is used to connect the adjustable diameter stabilizer body and the straightening block assembly.

[0007] Furthermore, in the present invention, the sliding sleeve, the return spring, the limit ring and the adjusting nut are all sleeved on the surface of the main shaft, and the return spring is located in the inner cavity of the sliding sleeve.

[0008] Furthermore, in the present invention, one end of the reset spring contacts the adjusting nut, and the other end of the reset spring contacts the limiting ring, and the limiting ring is threadedly connected to the surface of the main shaft.

[0009] Furthermore, in the present invention, the limit block is fixed at the center of the main shaft surface, and the limit block is used to limit the sliding track of the limit ring.

[0010] Furthermore, in the present invention, the external thread is provided on the surface of the main shaft, and the adjusting nut is threadably connected to the external thread.

[0011] Furthermore, in the present invention, the connection assembly includes a sleeve and a threaded connection block, and both ends of the variable diameter stabilizer body and the main shaft are fixedly connected with a threaded connection block, one end of the threaded connection block extends to the inner cavity of the sleeve and is threadedly connected to the inner cavity of the sleeve.

[0012] Beneficial effects: The utility model has the following beneficial effects:

[0013] The utility model has the effect of conveniently connecting the variable diameter stabilizer body and the straightening block assembly by providing a connecting assembly, thereby facilitating disassembly and replacement. The straightening block assembly is provided to achieve the effect of changing the use diameter of the straightening block. Through the cooperation of the sliding sleeve, the support arm, the straightening piece, the return spring, the limit ring, the adjusting nut, the external thread and the limit block, the straightening block has a telescopic function, which can realize the telescopic function of the straightening block and make it adapt to different wellbore sizes and drilling tool diameters, thereby achieving a better stabilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the utility model's variable diameter stabilizer body, the centralizing block assembly, and the connecting assembly in a separated state;

[0016] Figure 3 This is a schematic diagram of the structure of the connection state of the righting block assembly of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the utility model in a separated state of the sliding sleeve, the support arm and the centralizing piece.

[0018] In the picture:

[0019] 1. Variable diameter stabilizer body; 2. Straightening block assembly; 201. Main shaft; 202. Sliding sleeve; 203. Support arm; 204. Straightening plate; 205. Return spring; 206. Limiting ring; 207. Adjusting nut; 208. External thread; 209. Limiting block; 3. Connecting assembly; 301. Sleeve; 302. Threaded connecting block. DETAILED DESCRIPTION

[0020] In order to better understand the technical content of the present invention, specific embodiments are given and described as follows in conjunction with the accompanying drawings. Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, in which many illustrative embodiments are shown. The embodiments of the present disclosure are not necessarily defined to include all aspects of the present invention. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the present invention are not limited to any implementation method. In addition, some aspects disclosed in the present invention can be used alone or in any appropriate combination with other aspects disclosed in the present invention.

[0021] Example 1

[0022] like Figure 1-4 As shown in the figure, it is the first embodiment of the present invention, which provides a variable diameter stabilizer, including a variable diameter stabilizer body 1, a straightening block assembly 2 is installed at one end of the variable diameter stabilizer body 1, and the straightening block assembly 2 is used to straighten the drill tool. The straightening block assembly 2 includes a main shaft 201, a sliding sleeve 202, a support arm 203, a straightening piece 204, a return spring 205, a limiting ring 206, an adjusting nut 207, an external thread 208, a limiting block 209, a sliding sleeve 202, a support arm 203, a straightening piece 204, a return spring 205, limiting ring 206, adjusting nut 207, external thread 208 and limiting block 209 are each provided in two groups and are evenly distributed at both ends of the surface of the main shaft 201. One end of the support arm 203 is movably connected to the sliding sleeve 202 through a movable pin, and the support arms 203 at both ends are movably connected through a movable pin. The straightening plate 204 is installed on the surface of the support arm 203. A connecting assembly 3 is installed between the variable diameter stabilizer body 1 and the straightening block assembly 2. The connecting assembly 3 is used to connect the variable diameter stabilizer body 1 and the straightening block assembly 2.

[0023] like Figure 1-4As shown, the variable diameter stabilizer body 1 and the straightening block assembly 2 can be connected by the connecting assembly 3, so that they can be easily disassembled. The drill bit can also be connected to the variable diameter stabilizer body 1 through the connecting assembly 3. The variable diameter structure of the variable diameter stabilizer body 1 can adopt the application number: 201921140977.8 in the prior art, which discloses a variable diameter stabilizer for drilling. Through the cooperation of the sliding sleeve 202, the support arm 203, the straightening piece 204, the return spring 205, the limiting ring 206, the adjusting nut 207, the external thread 208 and the limiting block 209, the straightening block can achieve the effect of extension and contraction. By turning the adjusting nuts 207 at both ends clockwise, the adjusting nuts 2 07 rotates along the surface of the external thread 208 and pushes the sleeve 202 to move toward the center of the main shaft 201. The two sleeves 202 move at the same time to make the straightening piece 204 drive the support arm 203 to expand to both sides, thereby expanding the use diameter of the straightening block. The limit block 209 can limit the movement trajectory of the limit ring 206. The adjusting nut 207 squeezes the reset spring 205 while rotating, causing the reset spring 205 to be deformed under force. The reset elastic force of the reset spring 205 can improve the reset ability of the adjusting nut 207, thereby realizing the expansion and contraction of the straightening block, making it adapt to different wellbore sizes and drilling tool diameters, thereby achieving better stabilization effect.

[0024] Example 2

[0025] Reference Figure 1-4 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0026] In this embodiment, the sliding sleeve 202 , the return spring 205 , the limiting ring 206 and the adjusting nut 207 are all sleeved on the surface of the main shaft 201 , and the return spring 205 is located in the inner cavity of the sliding sleeve 202 .

[0027] One end of the return spring 205 contacts the adjusting nut 207 , and the other end of the return spring 205 contacts the limiting ring 206 . The limiting ring 206 is threadedly connected to the surface of the main shaft 201 .

[0028] The limit block 209 is fixed at the center of the surface of the main shaft 201 , and is used to limit the sliding track of the limit ring 206 .

[0029] The external thread 208 is formed on the surface of the main shaft 201 , and the adjusting nut 207 is threadedly connected to the external thread 208 .

[0030] The connecting assembly 3 includes a sleeve 301 and a threaded connecting block 302. The two ends of the variable diameter stabilizer body 1 and the main shaft 201 are fixedly connected with the threaded connecting block 302. One end of the threaded connecting block 302 extends to the inner cavity of the sleeve 301 and is threadedly connected to the inner cavity of the sleeve 301.

[0031] like Figure 1-4 As shown, the combination of the sleeve 301 and the threaded connecting block 302 can connect the variable diameter stabilizer body 1 to the main shaft 201, and can also be used to connect drilling tools such as a drill bit through the sleeve 301 and the threaded connecting block 302. By rotating the adjusting nut 207 counterclockwise, the adjusting nut 207 moves toward the other end along the surface of the external thread 208, so that the sliding sleeve 202 drives the support arm 203 to straighten, thereby reducing the usable diameter of the straightening block.

[0032] When in use, the cooperation of the sleeve 301 and the threaded connecting block 302 can connect the variable diameter stabilizer body 1 to the main shaft 201, so that it can be easily disassembled. The drill bit can also be connected to the variable diameter stabilizer body 1 through the connecting assembly 3. By turning the adjusting nuts 207 at both ends clockwise, the adjusting nuts 207 rotate along the surface of the external thread 208 and push the sleeve 202 to move toward the center of the main shaft 201. The two sleeves 202 move at the same time to make the straightening piece 204 drive the support arm 203 to expand to both sides, thereby expanding the usable diameter of the straightening block. The limit block 209 can limit the movement trajectory of the limit ring 206. The adjusting nut 207 squeezes the reset spring 205 while rotating, causing the reset spring 205 to be deformed under force. The reset elastic force of the reset spring 205 can improve the reset ability of the adjusting nut 207, thereby realizing the extension and contraction of the straightening block, making it adapt to different wellbore sizes and drilling tool diameters, thereby achieving better stabilization effect.

[0033] The standard parts used in this application document can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field. In addition, this application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0034] While the present invention has been described above with reference to preferred embodiments, this is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A variable diameter stabilizer, comprising a variable diameter stabilizer body (1), characterized in that: A straightening block assembly (2) is installed at one end of the variable diameter stabilizer body (1), and the straightening block assembly (2) is used for straightening the drilling tool. The straightening block assembly (2) comprises a main shaft (201), a sliding sleeve (202), a support arm (203), a straightening piece (204), a return spring (205), a limit ring (206), an adjusting nut (207), an external thread (208), and a limit block (209). ), two groups of external threads (208) and limit blocks (209) are provided and are evenly distributed at both ends of the surface of the main shaft (201); one end of the support arm (203) is movably connected to the sliding sleeve (202) through a movable pin, and the support arms (203) at both ends are movably connected through a movable pin; the straightening piece (204) is installed on the surface of the support arm (203); a connecting assembly (3) is installed between the variable diameter stabilizer body (1) and the straightening block assembly (2); the connecting assembly (3) is used to connect the variable diameter stabilizer body (1) and the straightening block assembly (2).

2. The variable diameter stabilizer according to claim 1, characterized in that: The sliding sleeve (202), the return spring (205), the limiting ring (206) and the adjusting nut (207) are all sleeved on the surface of the main shaft (201), and the return spring (205) is located in the inner cavity of the sliding sleeve (202).

3. The variable diameter stabilizer according to claim 1, characterized in that: One end of the reset spring (205) contacts the adjusting nut (207), and the other end of the reset spring (205) contacts the limiting ring (206), and the limiting ring (206) is threadedly connected to the surface of the main shaft (201).

4. The variable diameter stabilizer according to claim 1, characterized in that: The limiting block (209) is fixed at the center of the surface of the main shaft (201), and the limiting block (209) is used to limit the sliding track of the limiting ring (206).

5. The variable diameter stabilizer according to claim 1, characterized in that: The external thread (208) is formed on the surface of the main shaft (201), and the adjusting nut (207) is threadedly connected to the external thread (208).

6. The variable diameter stabilizer according to claim 1, characterized in that: The connection assembly (3) comprises a sleeve (301) and a threaded connection block (302), and both ends of the variable diameter stabilizer body (1) and the main shaft (201) are fixedly connected to the threaded connection block (302), and one end of the threaded connection block (302) extends to the inner cavity of the sleeve (301) and is threadedly connected to the inner cavity of the sleeve (301).

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