Anti-inclination centralizer for deep hole drilling

Abstract

The invention relates to a deep hole drilling anti-inclination centralizer which comprises a reducing connector, a wall protecting roller, a directional assembly, a reaming column and a hole penetrating device which are arranged in sequence. One end of the variable-diameter connector is used for being connected with a drill rod, the other end of the variable-diameter connector is rotationally connected with one end of the wall protection roller, the other end of the wall protection roller is rotationally connected with one end of the orientation assembly, and the other end of the orientation assembly is fixedly connected with one end of the reaming column. One end of the through hole device is inserted from the other end of the reaming column, penetrates through the reaming column and then is connected with the orientation assembly; a first drilling reamer is fixedly arranged on the outer circle of the reaming column, a flat-bottom drill bit is fixedly arranged on the end face of the other end of the reaming column, a sharp-tooth drill bit is fixedly arranged on the end face of the other end of the through hole device, and a second drilling reamer is fixedly arranged on the outer circle, close to the sharp-tooth drill bit, of the through hole device. According to the method, the situation that the hole diameter of the hole wall is increased to form a bag cavity is prevented, and the technical problem that the construction progress is slow due to hole wall shape complexity is solved.

Description

Technical Field

[0001] The invention relates to the field of deep hole drilling such as engineering exploration and oil field drilling, and in particular to a deep hole drilling anti-skew guide. Background Art

[0002] In drilling operations, drill buried accidents and cement slurry sealing accidents are common complex situations in the hole, which may be caused by a variety of factors, such as formation collapse, the presence of gravel or broken layers leading to unstable hole walls, and improper use of cement wall protection leading to drilling scrapping. Especially when dealing with deep hole accident sections, the drill rod will swing significantly in the hole, causing the hole to tilt and damage the hole wall, and also causing the drill rod to bend and deform. At present, spiral stabilizers are often installed at different parts of the drill rod to guide the drill rod. However, when the spiral guide is working, the diameter of the guide is slightly smaller than the diameter of the drill bit, which limits the swing amplitude of the drill rod during drilling, thereby achieving the purpose of reducing the hole tilt. However, during the drilling process, the stabilizer rotates together with the drill rod, causing the hole diameter to increase and form a cavity, which complicates the hole wall morphology and slows down the construction progress. Summary of the invention

[0003] In order to solve the technical problems in the prior art that the centralizer rotates together with the drill rod, causing the hole diameter to increase to form a cavity, complicating the hole wall morphology, and slowing down the construction progress, the present invention provides a deep hole drilling anti-skew guide.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A deep hole drilling anti-skew guide comprises a reducer, a wall protection roller, an oriented assembly, a reaming column and a through-hole device which are arranged in sequence, the reducer, the wall protection roller, the oriented assembly, the reaming column and the through-hole device are all cylindrical structures; one end of the reducer is used to connect the drill rod, the other end of the reducer is rotatably connected to one end of the wall protection roller, the other end of the wall protection roller is rotatably connected to one end of the oriented assembly, the other end of the oriented assembly is fixedly connected to one end of the reaming column, one end of the through-hole device is inserted from the other end of the reaming column and passes through the reaming column and is connected to the oriented assembly; a first drilling reamer is fixedly arranged on the outer circle of the reaming column, a flat-bottom drill bit is fixedly arranged on the end surface of the other end of the reaming column, a sharp-tooth drill bit is fixedly arranged on the end surface of the other end of the through-hole device, and a second drilling reamer is fixedly arranged on the outer circle of the through-hole device close to the sharp-tooth drill bit.

[0006] The beneficial effect of the present invention is that by arranging a wall protection roller and utilizing the rotatable characteristics of the wall protection roller, the swing amplitude of the drill rod is limited during the drilling process of the drilling tool, so as to achieve the purpose of reducing the hole inclination. At the same time, during the drilling process, the straightener, that is, the anti-inclination guide, rotates together with the drill rod, and the wall protection roller will not follow the rotation. However, the wall protection roller always supports the drill hole wall to prevent the hole diameter from increasing and forming a cavity, thereby solving the technical problem of slow construction progress caused by the complexity of the hole wall morphology.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the diameter of the hole-piercing device is smaller than the diameter of the hole-expanding column.

[0009] Furthermore, the reducer includes an upper connecting column with a tubular structure and a lower connecting column with a tubular structure, one end of the upper connecting column is used to connect the drill pipe, the other end of the upper connecting column is fixedly connected to one end of the lower connecting column, the diameter of the upper connecting column is smaller than the diameter of the lower connecting column, and the other end of the lower connecting column is rotatably connected to one end of the wall protection drum.

[0010] Furthermore, the wall protection roller includes an inner connecting column with a tubular structure and an outer roller with a tubular structure, the outer roller is sleeved on the outer circle of the inner connecting column, the outer roller is rotatably connected to the inner connecting column, the other end of the lower connecting column is fixedly connected to one end of the inner connecting column, the other end of the inner connecting column is fixedly connected to one end of the orienting assembly, the diameter of the lower connecting column and the diameter of the orienting assembly are both larger than the diameter of the inner connecting column, and the diameters of the lower connecting column, the outer roller and the orienting assembly are equal.

[0011] Furthermore, a plurality of rollers are provided between the inner connecting column and the outer drum, the plurality of rollers are evenly distributed on the outer circle of the inner connecting column, and each of the rollers is rotatably connected to the inner connecting column.

[0012] Furthermore, a core-through connecting shaft is provided on the through-hole device, one end of the core-through connecting shaft is fixedly connected to one end of the through-hole device, and the other end of the core-through connecting shaft is interlaced and matched with the directional assembly.

[0013] Furthermore, a through-core hole is opened at one end of the directional assembly, and the through-core hole is a through hole. The through-core connecting shaft is inserted and matched with the through-core hole. A compression-resistant butterfly spring and a pressure cover locking nut are sleeved on the through-core connecting shaft. One end of the compression-resistant butterfly spring abuts against the directional assembly, and the other end of the compression-resistant butterfly spring abuts against one end of the through-hole device. The pressure cover locking nut is used to limit the through-core connecting shaft from falling off from the directional assembly.

[0014] Further, the directional assembly includes a connector and an upper pressure cover, a first through-core hole is provided at one end of the connector, a second through-core hole is provided at the other end of the connector, a third through-core hole is provided at the bottom of the second through-core hole, the third through-core hole is communicated with the first through-core hole, a fourth through-core hole is provided on the upper pressure cover, the fourth through-core hole is a through hole, and the upper pressure cover is fixedly connected to one end of the connector; one end of the through-hole device is inserted and matched with the second through-core hole, the compression butterfly spring is located in the second through-core hole, and one end of the compression butterfly spring abuts against the orifice of the third through-core hole; the through-core connecting shaft passes through the second through-core hole, the third through-core hole, the first through-core hole and the fourth through-core hole in sequence and is connected to the pressure cover locking nut; a stainless steel compression bearing is also sleeved on the through-core connecting shaft, and the stainless steel compression bearing is located in the first through-core hole; wherein the through-core holes include the first through-core hole, the second through-core hole, the third through-core hole and the fourth through-core hole.

[0015] Furthermore, a pressurized water tank is provided at one end of the directional assembly, and the pressurized water tank runs through the directional assembly.

[0016] In order to solve the above technical problems, the present invention also provides a deep hole drilling tool, the specific technical contents of which are as follows:

[0017] A deep hole drilling tool comprises the above-mentioned deep hole drilling anti-deflection guide. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a deep hole drilling anti-skew guide in an embodiment of the present invention;

[0019] Figure 2 It is a schematic structural diagram of a reducer and a wall protection roller in an embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of an orientation assembly in an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the connection structure between the hole expansion column and the hole through-hole device in an embodiment of the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Reducer, 101. Upper connecting column, 102. Lower connecting column, 2. Wall protection roller, 201. Inner connecting column, 202. Roller, 203. Outer roller, 3. Orientation assembly, 301. Connecting thread, 302. Connector, 303. Pressurized water tank, 304. Fixing screw, 305. Upper pressure cover, 306. Pressure cover locking nut, 307. Through-core connecting shaft, 308. Upper locking nut, 309. First shock-absorbing washer, 310. Stainless steel compression bearing, 311. Second shock-absorbing washer, 312. Lower locking nut, 313. Third shock-absorbing washer, 314. Compression butterfly spring, 4. Reaming column, 5. First drilling reamer, 6. Flat-bottom drill bit, 7. Through-hole drill, 8. Second drilling reamer, 9. Sharp-tooth drill bit. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] like Figure 1 As shown, this embodiment provides a deep hole drilling anti-deflection guide, including a reducer 1, a wall protection drum 2, an orientation assembly 3, a hole expansion column 4 and a hole through device 7 which are arranged in sequence, wherein the reducer 1, the wall protection drum 2, the orientation assembly 3, the hole expansion column 4 and the hole through device 7 are all cylindrical structures; one end of the reducer 1 is used to connect the drill rod, and the other end of the reducer 1 is rotatably connected to one end of the wall protection drum 2, and the other end of the wall protection drum 2 is rotatably connected to one end of the orientation assembly 3 , the other end of the directional assembly 3 is fixedly connected to one end of the reaming column 4, one end of the through-hole device 7 is inserted from the other end of the reaming column 4 and passes through the reaming column 4 and then connected to the directional assembly 3; a first drilling reamer 5 is fixedly arranged on the outer circle of the reaming column 4, a flat-bottom drill bit 6 is fixedly arranged on the other end face of the reaming column 4, a sharp-tooth drill bit 9 is fixedly arranged on the other end face of the through-hole device 7, and a second drilling reamer 8 is fixedly arranged on the outer circle of the through-hole device 7 near the sharp-tooth drill bit 9. The rotating connection structure of the wall protection drum 2 is used to prevent the wall protection drum 2 from rotating, so that the wall protection drum 2 can be used to support the hole wall of the drilled hole in real time, to prevent the hole wall from increasing in diameter and forming a cavity when supporting the hole wall, and to solve the technical problem of slow construction progress caused by the complexity of the hole wall morphology.

[0026] In some embodiments, the diameter of the hole-clearing device 7 is smaller than the diameter of the hole-enlarging column 4. The hole-clearing device 7 with a smaller diameter can be used to clear the drilled hole first, and then the hole-enlarging column 4 with a larger diameter can be used to enlarge the hole, so that when dealing with the residue in the well, such as cement and collapsed materials, the accident well section can be cleared very quickly and efficiently.

[0027] like Figure 2As shown, in some embodiments, the reducer 1 includes an upper connecting column 101 with a tubular structure and a lower connecting column 102 with a tubular structure, one end of the upper connecting column 101 is used to connect the drill pipe, and the other end of the upper connecting column 101 is fixedly connected to one end of the lower connecting column 102, the diameter of the upper connecting column 101 is smaller than the diameter of the lower connecting column 102, and the other end of the lower connecting column 102 is rotatably connected to one end of the wall protection drum 2.

[0028] Depend on Figure 2 It can be known that the wall protection drum 2 includes an inner connecting column 201 with a tubular structure and an outer drum 203 with a tubular structure, the outer drum 203 is sleeved on the outer circle of the inner connecting column 201, the outer drum 203 is rotatably connected to the inner connecting column 201, the other end of the lower connecting column 102 is fixedly connected to one end of the inner connecting column 201, the other end of the inner connecting column 201 is fixedly connected to one end of the orienting assembly 3, the diameter of the lower connecting column 102 and the diameter of the orienting assembly 3 are both larger than the diameter of the inner connecting column 201, the diameters of the lower connecting column 102, the outer drum 203 and the orienting assembly 3 are equal, and the diameter of the hole expansion column 4 is also equal to the diameter of the lower connecting column 102 or the outer drum 203 or the orienting assembly 3.

[0029] Specifically, a plurality of rollers 202 are arranged between the inner connecting column 201 and the outer drum 203, and the plurality of rollers 202 are evenly distributed on the outer circle of the inner connecting column 201, and each of the rollers 202 is rotatably connected to the inner connecting column 201. The rollers 202 are arranged as cylindrical structures, and a connecting shaft is interspersed on each roller 202, and the connecting shaft runs through the entire roller 202 from one end of the roller 202, and the rollers 202 can rotate on the corresponding connecting shafts, and the two ends of the connecting shafts are respectively fixedly connected to the inner connecting column 201.

[0030] In this embodiment, by configuring the wall protection drum 2 to be rotationally connected between the outer drum 203 and the inner connecting column 201 via the roller 202 , the rotational friction of the outer drum 203 can be reduced.

[0031] like Figure 3 As shown, in some embodiments, a core connecting shaft 307 is provided on the through-hole device 7, one end of the core connecting shaft 307 is fixedly connected to one end of the through-hole device 7, and the other end of the core connecting shaft 307 is interlaced and matched with the directional assembly 3.

[0032] Specifically, a through hole is opened at one end of the directional assembly 3, and the through hole is a through hole. The through-core connecting shaft 307 is inserted and matched with the through hole. A compression-resistant butterfly spring 314 and a pressure cover locking nut 306 are sleeved on the through-core connecting shaft 307. One end of the compression-resistant butterfly spring 314 abuts against the directional assembly 3, and the other end of the compression-resistant butterfly spring 314 abuts against one end of the through-hole device 7. The pressure cover locking nut 306 is used to limit the through-core connecting shaft 307 from falling off from the directional assembly 3.

[0033] Specifically, the directional assembly 3 includes a connector 302 and an upper pressure cover 305, one end of the connector 302 is provided with a first through-core hole, the other end of the connector 302 is provided with a second through-core hole, the bottom of the second through-core hole is provided with a third through-core hole, the third through-core hole is connected with the first through-core hole, the upper pressure cover 305 is provided with a fourth through-core hole, the fourth through-core hole is a through hole, and the upper pressure cover 305 is fixedly connected to one end of the connector 302; one end of the through-hole device 7 is inserted and matched with the second through-core hole, and the compression butterfly spring 314 Located in the second through-core hole, one end of the compression-resistant butterfly spring 314 abuts against the orifice of the third through-core hole; the through-core connecting shaft 307 passes through the second through-core hole, the third through-core hole, the first through-core hole and the fourth through-core hole in sequence and is connected to the pressure cover locking nut 306; the through-core connecting shaft 307 is also sleeved with a stainless steel compression-resistant bearing 310, and the stainless steel compression-resistant bearing 310 is located in the first through-core hole; wherein, the through-core holes include the first through-core hole, the second through-core hole, the third through-core hole and the fourth through-core hole.

[0034] Connecting threads 301 are provided on the outer circles of both ends of the connecting body 302, so as to be threadedly connected to the inner connecting column 201 and the expanded hole column 4 respectively through the connecting threads 301, and the pressure cover locking nut 306 is threadedly connected to the through-core connecting shaft 307; the through-core connecting shaft 307 is sequentially sleeved with an upper locking nut 308, a first shock-absorbing washer 309, a stainless steel pressure-resistant bearing 310, a second shock-absorbing washer 311, a lower locking nut 312 and a third shock-absorbing washer 313; wherein, the upper locking nut 308, the first shock-absorbing washer 309, the stainless steel pressure-resistant bearing 310, the second shock-absorbing washer 311 and the lower locking nut 312 are all located in the first through-core hole; the upper locking nut 308 is close to the upper pressure cover 305, and the lower locking nut 312 is close to the third through-core hole. The third shock-absorbing washer 313 is located in the second through-hole, one end of the third shock-absorbing washer 313 abuts against one end of the compression-resistant butterfly spring 314 , and the other end of the third shock-absorbing washer 313 abuts against the opening of the third through-hole.

[0035] The upper pressure cover 305 is fixedly connected to the connecting body 302 by a plurality of fixing screws 304, and the stainless steel compression bearing 310 is preferably a stainless steel thrust bearing.

[0036] This embodiment reduces the axial impact stress of the through-hole tool 7 during the through-hole process by providing a stainless steel compression bearing 310 and a plurality of shock-absorbing washers, so as to achieve flexible through-hole operation using the through-hole tool 7 .

[0037] like Figure 4 As shown, the expansion column 4 is set as a tubular structure, the upper end of the through-hole device 7 passes through the expansion column 4, and the inner hole is

[0038] The first drilling reamer 5 and the second drilling reamer 8 are both reamers for drilling. The first drilling reamer 5 is fixedly sleeved on the outer circle of the reaming column 4, and the second drilling reamer 8 is fixedly sleeved on the outer circle of the through-hole device 7. The first drilling reamer 5 is close to the flat-bottom drill bit 6, and the second drilling reamer 8 is close to the pointed-tooth drill bit 9.

[0039] like Figure 3 and Figure 4 As shown, a booster water tank 303 is provided at one end of the directional assembly 3, and the booster water tank 303 runs through the directional assembly 3; there are multiple booster water tanks 303, each of which runs through the upper gland 305 and the connector 302 in sequence, and one end of each booster water tank 303 is connected to the inner tube hole of the inner connecting column 201, and the other end of each booster water tank 303 is connected to the inner tube hole of the exploration expander 5. The setting of the booster water tank 303 facilitates cleaning of residues in the deep hole.

[0040] The embodiment of the present invention sets a wall protection roller 2, and utilizes the rotatable characteristics of the wall protection roller 2 to limit the swing amplitude of the drill rod during the drilling process, so as to achieve the purpose of reducing the hole inclination. At the same time, during the drilling process, the wall protection roller 2 will not rotate along with the drill rod while the straightener, i.e., the anti-inclination guide, rotates together with the drill rod. However, the wall protection roller 2 always supports the drilling hole wall to prevent the hole wall from increasing the aperture and forming a cavity, thereby solving the technical problem of slow construction progress caused by the complexity of the hole wall morphology. At the same time, the anti-inclination guide provided by the embodiment of the present invention can be very fast and efficient when dealing with residues in the well, such as cement and collapsed materials, and can clear the accident well section, and has the function of preventing the drilling hole from tilting. The drilling efficiency is very high in practical applications. And the specifications of the multifunctional fast-clearing anti-inclination guide can be changed to be applicable to various apertures. This invention has an excellent wall protection effect, can effectively prevent blocks from falling and collapse in the hole, avoid buried drilling accidents, and ensure safety in the hole.

[0041] In some other embodiments, a deep hole drilling tool is provided, including the above-mentioned deep hole drilling anti-deflection guide. The deep hole drilling tool includes at least a plurality of drill rods, and the above-mentioned deep hole drilling anti-deflection guide is arranged between two adjacent drill rods to achieve the function of preventing the drilling hole from tilting.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep hole drilling anti-skew guide, characterized in that: The invention comprises a reducer (1), a wall protection roller (2), an orientation assembly (3), a hole expansion column (4) and a hole through-hole device (7) which are arranged in sequence. The reducer (1), the wall protection roller (2), the orientation assembly (3), the hole expansion column (4) and the hole through-hole device (7) are all cylindrical structures. One end of the reducer (1) is used to connect a drill rod, and the other end of the reducer (1) is rotatably connected to one end of the wall protection roller (2). The other end of the wall protection roller (2) is rotatably connected to one end of the orientation assembly (3). The other end is fixedly connected to one end of the reaming column (4); one end of the hole-through device (7) is inserted from the other end of the reaming column (4) and passes through the reaming column (4) and then connected to the directional assembly (3); a first drilling reamer (5) is fixedly arranged on the outer circle of the reaming column (4); a flat-bottomed drill bit (6) is fixedly arranged on the other end surface of the reaming column (4); a sharp-toothed drill bit (9) is fixedly arranged on the other end surface of the hole-through device (7); and a second drilling reamer (8) is fixedly arranged on the outer circle of the hole-through device (7) close to the sharp-toothed drill bit (9).

2. The deep hole drilling anti-deflection guide according to claim 1, characterized in that: The diameter of the hole-piercing device (7) is smaller than the diameter of the hole-expanding column (4).

3. The deep hole drilling anti-deflection guide according to claim 2, characterized in that: The reducer (1) comprises an upper connecting column (101) with a tubular structure and a lower connecting column (102) with a tubular structure, one end of the upper connecting column (101) is used to connect a drill pipe, the other end of the upper connecting column (101) is fixedly connected to one end of the lower connecting column (102), the diameter of the upper connecting column (101) is smaller than the diameter of the lower connecting column (102), and the other end of the lower connecting column (102) is rotatably connected to one end of the wall protection roller (2).

4. The deep hole drilling anti-skew guide according to claim 2, characterized in that: The wall protection roller (2) comprises an inner connecting column (201) with a tubular structure and an outer roller (203) with a tubular structure, wherein the outer roller (203) is sleeved on the outer circle of the inner connecting column (201), and the outer roller (203) is rotatably connected to the inner connecting column (201), the other end of the lower connecting column (102) is fixedly connected to one end of the inner connecting column (201), and the other end of the inner connecting column (201) is fixedly connected to one end of the directional assembly (3), the diameter of the lower connecting column (102) and the diameter of the directional assembly (3) are both larger than the diameter of the inner connecting column (201), and the diameters of the lower connecting column (102), the outer roller (203) and the directional assembly (3) are equal.

5. The deep hole drilling anti-deflection guide according to claim 4, characterized in that: A plurality of rollers (202) are provided between the inner connecting column (201) and the outer roller (203), and the plurality of rollers (202) are evenly distributed on the outer circle of the inner connecting column (201), and each of the rollers (202) is rotatably connected to the inner connecting column (201).

6. The deep hole drilling anti-skew guide according to claim 4, characterized in that: A core-through connecting shaft (307) is provided on the through-hole device (7), one end of the core-through connecting shaft (307) is fixedly connected to one end of the through-hole device (7), and the other end of the core-through connecting shaft (307) is interlaced and matched with the directional assembly (3).

7. The deep hole drilling anti-skew guide according to claim 6, characterized in that: A through hole is provided at one end of the directional assembly (3), and the through hole is a through hole. The through-core connecting shaft (307) is inserted and matched with the through hole. A compression-resistant butterfly spring (314) and a pressure cover locking nut (306) are sleeved on the through-core connecting shaft (307). One end of the compression-resistant butterfly spring (314) abuts against the directional assembly (3), and the other end of the compression-resistant butterfly spring (314) abuts against one end of the through-hole device (7). The pressure cover locking nut (306) is used to limit the through-core connecting shaft (307) from falling off from the directional assembly (3).

8. The deep hole drilling anti-skew guide according to claim 6, characterized in that: The directional assembly (3) comprises a connecting body (302) and an upper pressure cover (305), wherein a first through-core hole is provided at one end of the connecting body (302), a second through-core hole is provided at the other end of the connecting body (302), a third through-core hole is provided at the bottom of the second through-core hole, the third through-core hole is connected to the first through-core hole, a fourth through-core hole is provided on the upper pressure cover (305), the fourth through-core hole is a through hole, and the upper pressure cover (305) is fixedly connected to one end of the connecting body (302); one end of the through-hole device (7) is inserted and matched with the second through-core hole, and the compression butterfly spring (31 4) is located in the second through-core hole, one end of the compression butterfly spring (314) is in contact with the orifice of the third through-core hole; the through-core connecting shaft (307) passes through the second through-core hole, the third through-core hole, the first through-core hole and the fourth through-core hole in sequence and is connected to the pressure cover locking nut (306); the through-core connecting shaft (307) is also sleeved with a stainless steel compression bearing (310), and the stainless steel compression bearing (310) is located in the first through-core hole; wherein the through-core holes include the first through-core hole, the second through-core hole, the third through-core hole and the fourth through-core hole.

9. The deep hole drilling anti-deflection guide according to claim 6, characterized in that: A pressurized water tank (303) is provided at one end of the directional assembly (3), and the pressurized water tank (303) runs through the directional assembly (3).

10. A deep hole drilling tool, characterized in that: It comprises the deep hole drilling anti-skew guide as described in any one of claims 1 to 9.

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