CN110359871B - Cutting device in drill sleeve well and use method thereof - Google Patents
Cutting device in drill sleeve well and use method thereof Download PDFInfo
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- CN110359871B CN110359871B CN201910814905.5A CN201910814905A CN110359871B CN 110359871 B CN110359871 B CN 110359871B CN 201910814905 A CN201910814905 A CN 201910814905A CN 110359871 B CN110359871 B CN 110359871B
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- steel pipe
- main shaft
- main body
- cutting device
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 30
- 238000007906 compression Methods 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 69
- 239000010959 steel Substances 0.000 claims description 69
- 230000001105 regulatory effect Effects 0.000 claims description 34
- 238000005553 drilling Methods 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000002002 slurry Substances 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 8
- 238000011835 investigation Methods 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- 230000004308 accommodation Effects 0.000 description 10
- 238000007789 sealing Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
Abstract
The invention relates to a cutting device in a drill sleeve well and a using method thereof, belonging to the technical field of geological investigation equipment. The technical proposal is as follows: the guide sleeve (6), the main shaft (7) and the compression spring (10) are arranged in the tubular structure, the guide sleeve (6) is fixed on the main shaft, and the compression spring (10) is sleeved on the main shaft; the main body (13) is connected with the front end of the tubular structure, the center (14) is inserted into the tool bit accommodating cavity (16) of the main body (13) through the front end opening of the main body (13), the front end of the main shaft enters into the tool bit accommodating cavity of the main body through the rear end opening of the main body, the rear end of the tool bit (12) is hinged with the front end of the main shaft (7) through the pin shaft (11), and the side wall of the main body is provided with a tool bit extending opening (17) communicated with the tool bit accommodating cavity. The invention has the positive effects that: the drill rod and the sleeve can be cut off at any position in the drill hole, so that the drill rod and the sleeve blocked in the drill hole can be recovered to the greatest extent, and the cost is saved.
Description
Technical Field
The invention relates to a cutting device in a drill sleeve well and a using method thereof, belonging to the technical field of geological investigation equipment.
Background
When the geological drilling construction is carried out, the casing needs to be put into the well when the stratum is complicated and broken, when the drilling is completed, the outer casing is often blocked by broken stones, and sometimes the drilling accident happens, and the drilling rod and the drilling tool are blocked in the drilling hole. The method can not be used for extracting the recovery outside the drilling hole, but can only be used for placing the drilling sleeve in the drilling hole, so that unnecessary waste and environmental pollution are caused.
Disclosure of Invention
The invention aims to provide a cutting device in a drill sleeve well and a use method thereof, which are arranged at the bottom of a drill string, can extend into the drill sleeve from the inside of the stuck drill sleeve until reaching the stuck position, and the cutter head extends out and cuts the stuck drill sleeve, so that the purpose of smoothly recycling the upper drill sleeve is achieved, unnecessary waste is avoided, and the problems in the prior art are solved.
The technical scheme of the invention is as follows:
the utility model provides a cutting device in drill bushing well, contains pressure cover, uide bushing, main shaft, spring housing, compression spring, round pin axle, tool bit, main part and top, pressure cover and spring housing are connected, constitute tubular structure, uide bushing, main shaft and compression spring set up in tubular structure, and the uide bushing is fixed on the main shaft, and the cover is equipped with compression spring on the main shaft, and compression spring is located between uide bushing and the tubular structure front end, and uide bushing, main shaft, compression spring and tubular structure constitute piston structure; the main body is connected with the front end of the tubular structure, is of a cylindrical structure, is internally provided with a cutter head accommodating cavity, is open at the front end and the rear end, and is communicated with the cutter head accommodating cavity; the top is inserted into the tool bit accommodation cavity of main part through the front end opening of main part, and the front end of main shaft is through the rear end opening of main part entering into the tool bit accommodation cavity of main part, and the tool bit setting is in the tool bit accommodation cavity, and the tool bit rear end is articulated with the main shaft front end through the round pin axle, is equipped with the tool bit that is linked together with the tool bit accommodation cavity on the lateral wall of main part and stretches out the mouth, and tool bit one side is contacted with top, and the tool bit opposite side is contacted with the inner chamber wall in tool bit accommodation cavity.
The inside of the main shaft is provided with a strip-shaped drain hole I, the side walls of the front end and the rear end of the main shaft are respectively provided with a drain hole III and a pressure regulating hole, the drain hole III and the pressure regulating holes are communicated through the drain hole I, a hexagonal bolt penetrates through a hexagonal nut and then enters the drain hole I of the main shaft, and the side walls of the hexagonal bolt are in contact with the pressure regulating holes; the front end of the tubular structure is provided with a drainage groove, and the drainage hole is communicated with the tool bit accommodating cavity of the main body through the drainage groove.
The side wall of the guide sleeve is provided with an annular in-place protection groove, and the side wall of the tubular structure is provided with a second drainage hole matched with the in-place protection groove.
The side wall of the guide sleeve is also provided with an annular sealing groove, the O-shaped ring is arranged in the annular sealing groove, and the guide sleeve and the spring sleeve are sealed through the O-shaped ring.
Still contain round nut, preceding gasket and back gasket set up respectively in the both sides of uide bushing, preceding gasket is fastened mutually with the uide bushing through setting up the round nut on the main shaft, and back gasket sets up between compression spring and uide bushing.
The front gasket and the rear gasket are multiple.
The front end of the cutter head is provided with an arc chamfer.
The number of the cutter head extending openings is two.
The application method of the cutting device in the drill sleeve well adopts the cutting device and comprises the following steps:
(1) connecting the first steel pipe at the upper end of the pressing sleeve, enabling the cutting device to descend in the second steel pipe to be cut, and stopping descending when the cutting device reaches the position where the second steel pipe needs to be cut;
(2) supplying water into the first steel pipe by using a slurry pump, pressing a guide sleeve to drive a compression spring to compress, enabling a main shaft to enter a tool bit accommodating cavity, enabling water to enter the tool bit accommodating cavity through a pressure regulating hole, a first drainage hole and a third drainage hole, and finally discharging the water into the second steel pipe and a drilled hole through a tool bit extending hole; when the second steel pipe or the drilling hole starts to return water upwards, the water supply pressure of the slurry pump is regulated to about 0.5MPa, and at the moment, the cutter head stretches out of the main body from the cutter head stretching out opening and slightly contacts with the inner wall of the second steel pipe;
(3) slowly rotating the first steel pipe on the ground by using the drilling machine to drive the cutting device to slowly rotate, forming relative motion between the cutter head and the second steel pipe, and starting to cut the second steel pipe by the cutter head, wherein the operation of the cutter head is unstable due to the fact that the cutting is just started, and the cutter head is required to slowly rotate; when the cutter head cuts a part of the inner wall of the steel pipe II, after the cutting device runs stably, adjusting the water supply pressure of the slurry pump to 1-2MPa, and improving the rotating speed of the steel pipe I to perform quick cutting;
(4) when the second steel pipe is cut off, the inner cavity of the tubular structure is communicated with the second drain hole through the in-place protection groove on the side wall of the guide sleeve, and water flow in the tubular structure is discharged into the second steel pipe through the in-place protection groove and the second drain hole and returns to the ground through the inner cavity of the second steel pipe; at this time, the water supply pressure of the slurry pump is reduced to the minimum, the slurry pump can be stopped, when the pressure in the hole is stable, the cutting device is lifted by the first steel pipe, and then the second cut steel pipe is taken out, so that the operation is completed.
The pressure regulating holes are 4 or 6, the pressure regulating holes are distributed on the side wall of the main shaft in a staggered manner, the centers of all the pressure regulating holes are not positioned on the same circumferential section of the main shaft, the overflow area of the pressure regulating holes can be adjusted slightly by screwing the hexagonal bolts, and the pressure is adjusted stably.
When the drilling tool works, drilling mud enters the tubular structure from the rear end opening of the tubular structure, the drilling mud pushes the guide sleeve and the main shaft to move forwards (similar to piston movement), meanwhile, the tool bit is driven to extend out of the tool bit extending opening, the drilling machine drives the cutting device to integrally rotate to provide power for the tool bit, the tool bit cuts the blocked drill sleeve, after cutting is completed, when pressure disappears, the guide sleeve moves backwards through the elastic force of the compression spring, meanwhile, the main shaft is driven to move backwards, the tool bit is recovered into the tool bit accommodating cavity, and finally, the cutting device is taken out to recover the drill sleeve at the upper part.
The invention has the positive effects that: the drill rod and the sleeve can be cut off at any position in the drill hole, so that the drill rod and the sleeve blocked in the drill hole can be recovered to the greatest extent, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the present invention in use;
FIG. 3 is an enlarged view of an internal cross-section of the press jacket of the present invention;
in the figure: the novel hydraulic pressure type hydraulic pressure control device comprises a pressure sleeve 1, a hexagonal bolt 2, a hexagonal nut 3, a round nut 4, a front gasket 5, a guide sleeve 6, a main shaft 7, an O-shaped ring 8, a spring sleeve 9, a compression spring 10, a pin shaft 11, a tool bit 12, a main body 13, a tip 14, a rear gasket 15, a tool bit accommodating cavity 16, a tool bit extending port 17, a first steel pipe 18, a second steel pipe 19, a drilling hole 20, an in-place protection groove A, a pressure regulating hole B, a first drainage hole C, a second drainage hole D, a drainage groove E and a third drainage hole F.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
the utility model provides a cutting device in drill bushing well, contains pressure cover 1, uide bushing 6, main shaft 7, spring housing 9, compression spring 10, round pin axle 11, tool bit 12, main part 13 and top 14, pressure cover 1 and spring housing 9 are connected, constitute tubular structure, uide bushing 6, main shaft 7 and compression spring 10 set up in tubular structure, uide bushing 6 is fixed on main shaft 7, is equipped with compression spring 10 on the main shaft 7 cover, compression spring 10 is located between uide bushing 6 and the tubular structure front end, uide bushing 6, main shaft 7, compression spring 10 and tubular structure constitute piston structure; the main body 13 is connected with the front end of the tubular structure, the main body 13 is of a cylindrical structure, a cutter head accommodating cavity 16 is arranged in the main body, and the front end and the rear end of the main body 13 are both open and are communicated with the cutter head accommodating cavity 16; tip 14 inserts in the tool bit accommodation chamber 16 of main part 13 through the front end opening of main part 13, and the front end of main shaft 7 enters into the tool bit accommodation chamber 16 of main part 13 through the rear end opening of main part 13, and tool bit 12 sets up in tool bit accommodation chamber 16, and tool bit 12 rear end articulates with main shaft 7 front end through round pin axle 11, is equipped with the tool bit that is linked together with the tool bit accommodation chamber on the lateral wall of main part 13 and stretches out the mouth 17, and tool bit 12 one side is contacted with tip 14, and tool bit 12 opposite side is contacted with the inner chamber wall of tool bit accommodation chamber 16.
A strip-shaped drain hole I C is formed in the main shaft 7, drain holes three F and pressure regulating holes B are respectively formed in the side walls of the front end and the rear end of the main shaft 7, the drain holes three F and the pressure regulating holes B are communicated through the drain holes I C, a hexagonal bolt 2 penetrates through a hexagonal nut 3 and then enters the drain holes I C of the main shaft 7, and the side walls of the hexagonal bolt are in contact with the pressure regulating holes B; the front end of the tubular structure is provided with a drainage groove E, and the drainage hole III F is communicated with the tool bit accommodating cavity of the main body 13 through the drainage groove E.
An annular in-place protection groove A is formed in the side wall of the guide sleeve 6, and a drainage hole two D matched with the in-place protection groove A is formed in the side wall of the tubular structure.
The side wall of the guide sleeve 6 is also provided with an annular sealing groove, an O-shaped ring 8 is arranged in the annular sealing groove, and the guide sleeve 6 and the spring sleeve 9 are sealed through the O-shaped ring 8.
Still contain round nut 4, preceding gasket 5 and back gasket 15 set up respectively in the both sides of uide bushing 6, preceding gasket 5 is fastened mutually with uide bushing 6 through the round nut 4 that sets up on main shaft 7, back gasket 15 sets up between compression spring 10 and uide bushing 6.
The number of the front gasket 5 and the rear gasket 15 is at least one.
The front end of the cutter head 12 is provided with an arc chamfer.
The number of the cutter head extending openings 17 is two.
The application method of the cutting device in the drill sleeve well adopts the cutting device and comprises the following steps:
(1) connecting a first steel pipe 18 at the upper end of the pressing sleeve 1, enabling the cutting device to descend in a second steel pipe 19 to be cut, and stopping descending when the cutting device reaches a position where the second steel pipe 19 needs to be cut;
(2) the slurry pump is used for supplying water into the first steel pipe 18, the guide sleeve 6 is pressed to drive the compression spring 10 to compress, the main shaft 7 enters the tool bit accommodating cavity 16, the water flows through the pressure regulating hole B, the first drainage hole C and the third drainage hole F to enter the tool bit accommodating cavity 16, and finally the water is discharged into the second steel pipe 19 and the drilling hole 20 through the tool bit extending outlet 17; when the second steel pipe 19 or the drilling hole 20 starts to return water upwards, the water supply pressure of the slurry pump is regulated to about 0.5MPa, and at the moment, the cutter head 12 extends out of the main body 13 from the cutter head extending port 17 and slightly contacts with the inner wall of the second steel pipe 19;
(3) slowly rotating the first steel pipe 18 on the ground by using the drilling machine to drive the cutting device to slowly rotate, forming relative motion between the cutter head 12 and the second steel pipe 19, and starting to cut the second steel pipe 19 by the cutter head 12, wherein the operation of the cutter head is unstable due to the fact that the cutting is just started, and the cutter head must slowly rotate; when the cutter head 12 cuts into a part of the inner wall of the steel pipe II 19, after the cutting device runs stably, adjusting the water supply pressure of the slurry pump to 1-2MPa, and improving the rotating speed of the steel pipe I18 to perform quick cutting;
(4) when the second steel pipe 19 is cut off, the inner cavity of the tubular structure is communicated with the second drain hole D through the in-place protection groove A on the side wall of the guide sleeve 6, and water flow in the tubular structure is discharged into the second steel pipe 19 through the in-place protection groove A and the second drain hole D and returns to the ground through the inner cavity of the second steel pipe 19; at this time, the water supply pressure of the slurry pump is reduced to the minimum, the slurry pump can be stopped, when the pressure in the borehole 20 is stable, the cutting device is lifted by the first steel pipe 18, and then the second cut steel pipe 19 is taken out, so that the operation is completed.
The number of the pressure regulating holes B is 4 or 6, the pressure regulating holes B are distributed on the side wall of the main shaft 7 in a staggered manner, the centers of all the pressure regulating holes B are not located on the same circumferential section of the main shaft 7, the overflow area of the pressure regulating holes B can be adjusted slightly by screwing the hexagonal bolts 2, and the pressure is adjusted stably.
In this embodiment, with reference to fig. 1, the cutter head is hinged to the front end of the spindle by a pin, and can move up and down along with the spindle. When the main shaft moves downwards, the center forces the tool bit to rotate around the pin shaft, so that the tool nose protrudes out of the main body, and the cutting of the drill sleeve is completed. When the main shaft moves upwards, the inner cavity wall of the tool bit accommodating cavity in the main body forces the tool bit to be recovered, so that the tool bit is hidden in the tool bit accommodating cavity of the main body, and the tool bit can conveniently move in the drill sleeve cavity needing to be cut. The downward movement of the cutter head and spindle is accomplished by the drilling mud pushing on the piston structure. When the guide sleeve 6 reaches the front end of the tubular structure, the in-place protection groove A is communicated with the drainage hole II D, drilling mud is drained out along the in-place protection groove A through the drainage hole II D, hydraulic force is reduced, the guide sleeve 6 and the main shaft 7 move backwards slightly, the tool bit stops to extend continuously, and the tool bit is protected. The upward movement of the tool bit and the main shaft is realized by the elastic force of the compression spring. The drilling mud pushes the guide sleeve to move and simultaneously compresses the compression spring, mechanical energy is stored, and when the hydraulic force disappears, the compression spring pushes the guide sleeve to drive the main shaft and the tool bit to retract.
The main part 13 is the cylindric structure of both ends all open-ended around, sets up two tool bit holding chamber 16 that are linked together in its inside along the circumferencial direction, and tool bit holding chamber 16 is linked together with the opening at both ends around the main part, and the inner chamber wall that tool bit holding chamber 16 is connected with the open position of main part rear end is the slope setting, and tool bit 12 contacts with the inner chamber wall that the slope set up. The tool bit 12 and the main shaft 7 are connected into a whole through the pin shaft 11, so that the transmission of the movement from the main shaft 7 to the tool bit is realized; the front end of the main body is provided with an installation hole for assembling the center 14, so that the cutter head 12 and the main shaft 7 are prevented from moving linearly, the cutter head 12 is driven to rotate around a pin shaft, and the cutter head 12 is opened; the rear end of the main body is sequentially connected with a spring sleeve 9 and a pressure sleeve 1 to form a main body structure of the cutting device in the drill sleeve well.
The spring sleeve 9 is internally provided with a guide sleeve 6 and a compression spring 10. The guide sleeve 6 is provided with an annular sealing groove and an in-place protection groove A, and the annular sealing groove is provided with an O-shaped ring 8 to realize the sealing between the guide sleeve 6 and the spring sleeve 9. The two ends of the guide sleeve 6 are respectively provided with a front gasket 5 and a rear gasket 15 with different numbers, and the number of the front gasket 5 and the rear gasket 15 can be adjusted to the mutual position relation between the protection groove A and the action of stopping the cutter head 12 from extending out of the main body 13. The guide sleeve 6, the front gasket 5 and the rear gasket 15 are clamped on the main shaft 7 through the round nut 4 and the compression spring 10, so that the guide sleeve, the front gasket and the rear gasket are integrated.
The rear end of the main shaft 7 is provided with a hexagonal bolt 2 and a hexagonal nut 3, the tension of the cutter head can be adjusted according to the requirement, the hexagonal bolt 2 is adjusted, the size of the overflow area of the pressure regulating hole B is changed, part of high-pressure drilling mud is discharged through the pressure regulating hole B, the discharge hole C and the discharge hole F along the discharge groove E through the cutter head accommodating cavity 16, the flow of the drilling mud through the cutting device is adjusted, the pressure of the drilling mud on the guide sleeve 6 is changed, the feeding cutting force of the cutter head 12 is further changed, and the cutting construction safety and the service life of the cutter head are ensured.
The application method of the embodiment comprises the following steps:
1. the first steel pipe 18 is connected to the upper end of the pressing sleeve 1, so that the cutting device can descend in the second steel pipe 19 to be cut, and when the cutting device reaches the position where the second steel pipe 19 needs to be cut, the lowering is stopped.
2. The first steel pipe 18 is supplied with water by a slurry pump, and when the second steel pipe 19 or the drilled hole 20 starts to return water at the ground surface, the water supply pressure of the slurry pump is adjusted to about 0.5 MPa. At this time, the cutter head 12 extends out of the main body 13 and is slightly contacted with the inner wall of the second steel pipe 19.
3. The first steel pipe 18 is slowly rotated by the ground drilling machine, the cutting device is driven to slowly rotate, relative movement is formed between the cutter head 12 and the second steel pipe 19, and the cutter head 12 starts to cut the second steel pipe 19, so that the cutter head does not operate stably just at the moment, and must slowly rotate. When the cutter head 12 cuts into a part of the inner wall of the second steel pipe 19, after the cutting device runs stably, the water supply pressure of the slurry pump is adjusted to 1-2MPa, the rotating speed of the first steel pipe is increased, and quick cutting is performed.
4. Considering that the possibility that the cutting device is not located at the center of the second steel pipe 19 when the cutter head 12 cuts is high, the maximum opening size of the cutter head 12 is designed to be 10mm larger than the outer diameter of the second steel pipe 19.
5. The number of the pressure regulating holes B is 4 or 6, the centers of all the pressure regulating holes B are not positioned on the same circumference section, and the overflow area of the pressure regulating holes B can be slightly regulated when the hexagonal bolts 2 are screwed to regulate the pressure, so that the pressure is regulated stably.
6. When the second steel pipe 19 is cut off, the in-place protection groove A on the side wall of the guide sleeve 6 is communicated with the spring cavity of the spring sleeve 9, water is discharged out through the discharge hole D, and returns to the ground through the inner cavity of the second steel pipe 19. At this time, the water supply pressure of the slurry pump is reduced to the minimum, and when the pressure in the borehole 20 is stable, the cutting device is lifted by the first steel pipe 18.
Claims (5)
1. A cutting device in a drill casing well, characterized in that: the novel tool comprises a pressing sleeve (1), a guide sleeve (6), a main shaft (7), a spring sleeve (9), a compression spring (10), a pin shaft (11), a tool bit (12), a main body (13) and a center (14), wherein the pressing sleeve (1) and the spring sleeve (9) are connected to form a tubular structure, the guide sleeve (6), the main shaft (7) and the compression spring (10) are arranged in the tubular structure, the guide sleeve (6) is fixed on the main shaft (7), the compression spring (10) is sleeved on the main shaft (7), the compression spring (10) is positioned between the guide sleeve (6) and the front end of the tubular structure, and the guide sleeve (6), the main shaft (7), the compression spring (10) and the tubular structure form a piston structure; the main body (13) is connected with the front end of the tubular structure, the main body (13) is of a cylindrical structure, a cutter head accommodating cavity (16) is arranged in the main body, and the front end and the rear end of the main body (13) are both open and are communicated with the cutter head accommodating cavity (16); the tip (14) is inserted into a tool bit accommodating cavity (16) of the main body (13) through a front end opening of the main body (13), the front end of the main shaft (7) enters the tool bit accommodating cavity (16) of the main body (13) through a rear end opening of the main body (13), the tool bit (12) is arranged in the tool bit accommodating cavity (16), the rear end of the tool bit (12) is hinged with the front end of the main shaft (7) through a pin shaft (11), a tool bit extending opening (17) communicated with the tool bit accommodating cavity is formed in the side wall of the main body (13), one side of the tool bit (12) is contacted with the tip (14), and the other side of the tool bit (12) is contacted with the inner cavity wall of the tool bit accommodating cavity (16);
the inside of the main shaft (7) is provided with a strip-shaped drain hole I (C), the side walls of the front end and the rear end of the main shaft (7) are respectively provided with a drain hole III (F) and a pressure regulating hole (B), the drain hole III (F) and the pressure regulating hole (B) are communicated through the drain hole I (C), a hexagonal bolt (2) penetrates through a hexagonal nut (3) and then enters the drain hole I (C) of the main shaft (7), and the side walls of the hexagonal bolt are in contact with the pressure regulating hole (B); the front end of the tubular structure is provided with a drainage groove (E), and a drainage hole III (F) is communicated with a tool bit accommodating cavity of the main body (13) through the drainage groove (E);
an annular in-place protection groove (A) is formed in the side wall of the guide sleeve (6), and a drainage hole II (D) matched with the in-place protection groove (A) is formed in the side wall of the tubular structure;
the side wall of the guide sleeve (6) is also provided with an annular groove, an O-shaped ring (8) is arranged in the annular groove, and the guide sleeve (6) and the spring sleeve (9) are sealed through the O-shaped ring (8);
still contain round nut (4), preceding gasket (5) and back gasket (15) set up respectively in the both sides of uide bushing (6), preceding gasket (5) are fastened mutually with uide bushing (6) through round nut (4) that set up on main shaft (7), back gasket (15) set up between compression spring (10) and uide bushing (6).
2. A cutting device in a drill casing well according to claim 1, wherein: the number of the front gaskets (5) and the rear gaskets (15) is at least one.
3. A cutting device in a drill casing well according to claim 1, wherein: the front end of the cutter head (12) is provided with an arc chamfer.
4. A method of using a cutting device in a drill casing well, employing a cutting device as defined in any one of claims 1-3, characterized by the steps of:
(1) connecting a first steel pipe (18) at the upper end of the pressing sleeve (1) so that the cutting device can descend in a second steel pipe (19) to be cut, and stopping descending when the cutting device reaches a position where the second steel pipe (19) needs to be cut;
(2) the slurry pump is used for supplying water to the first steel pipe (18), the guide sleeve (6) is pressed to drive the compression spring (10) to compress, the main shaft (7) enters the tool bit accommodating cavity (16), the water flow enters the tool bit accommodating cavity (16) through the pressure regulating hole (B), the first drainage hole (C) and the third drainage hole (F), and finally is discharged into the second steel pipe (19) and the drilling hole (20) through the tool bit extending outlet (17); when the second steel pipe (19) or the drilling hole (20) starts to return water upwards, the water supply pressure of the slurry pump is regulated to about 0.5MPa, and at the moment, the cutter head (12) extends out of the main body (13) from the cutter head extending outlet (17) and slightly contacts with the inner wall of the second steel pipe (19);
(3) slowly rotating the first steel pipe (18) by the ground drilling machine to drive the cutting device to slowly rotate, forming relative motion between the cutter head (12) and the second steel pipe (19), and starting to cut the second steel pipe (19) by the cutter head (12), wherein the operation of the cutter head is unstable due to the fact that the cutting is just started, and the cutter head is required to slowly rotate; when the cutter head (12) cuts into a part of the inner wall of the steel pipe II (19), after the cutting device runs stably, adjusting the water supply pressure of the slurry pump to 1-2MPa, and improving the rotating speed of the steel pipe I (18) to perform quick cutting;
(4) when the second steel pipe (19) is cut off, the inner cavity of the tubular structure is communicated with the second drainage hole (D) through the in-place protection groove (A) on the side wall of the guide sleeve (6), and water flow in the tubular structure is discharged into the second steel pipe (19) through the in-place protection groove (A) and the second drainage hole (D) and returns to the ground through the inner cavity of the second steel pipe (19); at this time, the water supply pressure of the slurry pump is reduced to the minimum, the slurry pump can be stopped, when the pressure in the borehole (20) is stable, the cutting device is lifted by the first steel pipe (18), and then the second cut steel pipe (19) is taken out, so that the operation is completed.
5. A method of using a cutting device in a drill casing well according to claim 4, wherein: four or six pressure regulating holes (B) are distributed on the side wall of the main shaft (7) in a staggered manner, the centers of all the pressure regulating holes (B) are not located on the same circumferential section, and the overflow area of the pressure regulating holes (B) can be adjusted slightly by screwing the hexagonal bolts (2), so that the pressure is adjusted stably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910814905.5A CN110359871B (en) | 2019-08-30 | 2019-08-30 | Cutting device in drill sleeve well and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910814905.5A CN110359871B (en) | 2019-08-30 | 2019-08-30 | Cutting device in drill sleeve well and use method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110359871A CN110359871A (en) | 2019-10-22 |
| CN110359871B true CN110359871B (en) | 2024-03-12 |
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| CN201910814905.5A Active CN110359871B (en) | 2019-08-30 | 2019-08-30 | Cutting device in drill sleeve well and use method thereof |
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| CN111058787B (en) * | 2019-11-20 | 2022-07-15 | 中国海洋石油集团有限公司 | Positioning hydraulic internal cutting knife and oil pipe cutting method |
| CN113021191B (en) * | 2019-12-24 | 2022-08-30 | 中国石油天然气股份有限公司 | Experimental system for abrasive water jet cutting sleeve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US1913636A (en) * | 1928-03-30 | 1933-06-13 | James S Abercrombie | Uniform pressure casing cutter |
| GB685515A (en) * | 1951-06-07 | 1953-01-07 | Maurycy Ringler | Apparatus for cutting pipes of rotary well-boring apparatus |
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| CN107387011A (en) * | 2017-08-02 | 2017-11-24 | 西南石油大学 | Waterpower promotes the downhole tool for realizing continuous cutting different-diameter sleeve pipe |
| CN206860153U (en) * | 2017-05-24 | 2018-01-09 | 中海油能源发展股份有限公司 | A kind of waterpower for being used to cut multilayer sleeve cuts tool |
| CN210918950U (en) * | 2019-08-30 | 2020-07-03 | 金石钻探(唐山)股份有限公司 | Cutting device in drilling casing well |
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2019
- 2019-08-30 CN CN201910814905.5A patent/CN110359871B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1913636A (en) * | 1928-03-30 | 1933-06-13 | James S Abercrombie | Uniform pressure casing cutter |
| GB685515A (en) * | 1951-06-07 | 1953-01-07 | Maurycy Ringler | Apparatus for cutting pipes of rotary well-boring apparatus |
| CN204312002U (en) * | 2014-11-19 | 2015-05-06 | 中国地质科学院勘探技术研究所 | A kind of waterpower internal cutter cutting accident drill rod |
| CN206860153U (en) * | 2017-05-24 | 2018-01-09 | 中海油能源发展股份有限公司 | A kind of waterpower for being used to cut multilayer sleeve cuts tool |
| CN107387011A (en) * | 2017-08-02 | 2017-11-24 | 西南石油大学 | Waterpower promotes the downhole tool for realizing continuous cutting different-diameter sleeve pipe |
| CN210918950U (en) * | 2019-08-30 | 2020-07-03 | 金石钻探(唐山)股份有限公司 | Cutting device in drilling casing well |
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| Publication number | Publication date |
|---|---|
| CN110359871A (en) | 2019-10-22 |
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