CN110359871A - A kind of drill bushing pipe well internal cutting off device and its application method - Google Patents
A kind of drill bushing pipe well internal cutting off device and its application method Download PDFInfo
- Publication number
- CN110359871A CN110359871A CN201910814905.5A CN201910814905A CN110359871A CN 110359871 A CN110359871 A CN 110359871A CN 201910814905 A CN201910814905 A CN 201910814905A CN 110359871 A CN110359871 A CN 110359871A
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- cutter head
- main shaft
- steel pipe
- main body
- guide sleeve
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- 238000005520 cutting process Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 65
- 239000010959 steel Substances 0.000 claims description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000001012 protector Effects 0.000 claims description 16
- 239000008400 supply water Substances 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000013507 mapping Methods 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010015856 Extrasystoles Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing 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 present invention relates to a kind of drill bushing pipe well internal cutting off device and its application methods, belong to geological mapping equipment technical field.Technical solution is: guide sleeve (6), main shaft (7) and compressed spring (10) are arranged in tubular structure, and guide sleeve (6) is fixed on main shaft, and compressed spring (10) are arranged on main shaft；Main body (13) is connected with the front end of tubular structure, top (14) are inserted into the cutter head accommodating chamber (16) of main body (13) by the front opening of main body (13), the front end of main shaft is entered in the cutter head accommodating chamber of main body by the open rearward end of main body, cutter head (12) rear end is hinged by pin shaft (11) and main shaft (7) front end, and the side wall of main body is equipped with the cutter head extending port (17) being connected with cutter head accommodating chamber.The positive effect of the present invention: cutting operation can be carried out interior any position to drilling rod, casing in the borehole, to the greatest extent drilling rod stuck in recycling drilling, casing, save the cost.
Description
Technical field
The present invention relates to a kind of drill bushing pipe well internal cutting off device and its application methods, belong to geological mapping equipment and technology neck
Domain.
Background technique
In geological drilling construction, when encountering complexity, broken formation, tripping in casing is needed, when drilling completion, outer layer jacket
Pipe is often stuck by rubble, and drill burst accident sometimes, in the stuck drilling of drill rod boring tool.It cannot propose the outer recycling that drills, it can only
Drill sleeve of leaving is put aside as useless in drilling, and unnecessary waste and environmental pollution are caused.
Summary of the invention
The object of the present invention is to provide a kind of drill bushing pipe well internal cutting off device and its application methods, are installed on drill string bottom
Portion can be protruded by the inside of stuck drill sleeve, and until reaching stuck position, cutter head stretches out and cuts stuck drill sleeve, reaches
The smoothly purpose of recycling top drill sleeve, avoids unnecessary waste, solves the above problem existing for background technique.
The technical scheme is that
A kind of drill bushing pipe well internal cutting off device includes pressing sleeve, guide sleeve, main shaft, spring pocket, compressed spring, pin shaft, cutter head, master
Body and top, the pressing sleeve is connected with spring pocket, forms tubular structure, and guide sleeve, main shaft and compressed spring are arranged in tubulose
In structure, guide sleeve is fixed on main shaft, and compressed spring is arranged on main shaft, before compressed spring is located at guide sleeve and tubular structure
Between end, guide sleeve, main shaft, compressed spring and tubular structure form piston structure；Main body is connected with the front end of tubular structure,
Main body is cylindrical-shaped structure, and inside is equipped with cutter head accommodating chamber, and main body rear and front end is open, and is connected with cutter head accommodating chamber；
The top front opening by main body is inserted into the cutter head accommodating chamber of main body, the front end of main shaft by the open rearward end of main body into
Entering into the cutter head accommodating chamber of main body, cutter head is arranged in cutter head accommodating chamber, and cutter head rear end is hinged by pin shaft and front-end of spindle,
The side wall of main body is equipped with the cutter head extending port being connected with cutter head accommodating chamber, and cutter head side is in contact with top, and cutter head is another
Side is in contact with the internal chamber wall of cutter head accommodating chamber.
The inside of the main shaft is equipped with the discharge orifice one of strip, is respectively equipped with discharge orifice on the side wall of main shaft rear and front end
Three and regulator hole, discharge orifice three and regulator hole are connected by discharge orifice one, and hex bolts enters master after passing through hex nut
In the discharge orifice one of axis, the side wall of hex bolts is in contact with regulator hole；The front end of tubular structure is equipped with dredging flow groove, discharge orifice three
It is connected by dredging flow groove with the cutter head accommodating chamber of main body.
The side wall of the guide sleeve is equipped with the protector in place of annular, and the side wall of tubular structure is equipped with and protects in place
The discharge orifice two that slot matches.
Annular seal groove is additionally provided on the guide sleeve side wall, O-ring is arranged in annular seal groove, guide sleeve and spring
It is sealed between set by O-ring.
It also include round nut, front pad and rear gasket, front pad and rear gasket are separately positioned on the two sides of guide sleeve, foremast
Piece passes through the round nut being arranged on main shaft and is fastened with guide sleeve, and rear gasket is arranged between compressed spring and guide sleeve.
The front pad and rear gasket are multiple.
The front end of the cutter head is equipped with arcuation chamfering.
The cutter head extending port is two.
A kind of application method of drill bushing pipe well internal cutting off device, using above-mentioned disconnecting device, steps are as follows:
1. the joint steel pipe one in pressing sleeve upper end, enables cutter device to decline in steel pipe two to be cut, works as cutter device
When reaching the position that steel pipe two needs to cut off, stop decline；
2. being supplied water with slush pump into steel pipe one, guide sleeve, which is pressurized, drives compressed spring compression, and main shaft enters cutter head accommodating chamber
Interior, water flow is entered in cutter head accommodating chamber by regulator hole, discharge orifice one and discharge orifice three, is most discharged to afterwards through cutter head extending port
In steel pipe two and drilling；When steel pipe two or drilling start to return water upwards, adjustment slush pump pressure of supply water to 0.5MPa or so, this
When cutter head from cutter head extending port stretch out main body outside, with two inner wall gentle touchdown of steel pipe；
3. the slow rotating steel tube one of drilling machine on ground drives cutter device slowly to rotate, forms phase between cutter head and steel pipe two
To movement, cutter head starts pipe cutting two, and at this time due to just starting to cut, the operation of cutter head is unstable, has to rotate at a slow speed；
When cutter head cuts into steel pipe two inner wall a part, after cutter device runs smoothly, the pressure of supply water of slush pump is adjusted to 1-2MPa,
The revolving speed of steel pipe one is improved, fly-cutting is carried out；
4. the inner cavity of tubular structure passes through the protector in place and discharge orifice bigeminy on guide sleeve side wall when steel pipe two is cut off
Logical, the water flow in tubular structure is released in steel pipe two by protector in place and discharge orifice two, returns to ground through two inner cavity of steel pipe
Face；Slush pump pressure of supply water is minimized at this time, can stop slush pump, when pressure in hole is stablized, is filled cutting with steel pipe one
It is proposed is set, then the steel pipe two cut off is taken out, that is, completes operation.
The regulator hole has 4 or 6, is interspersed on main shaft side wall, and the center of all regulator holes is not at main shaft
On same circumferential section, the area of passage for adjusting regulator hole that hex bolts can be small is turned, pressure is steadily adjusted.
When the invention works, drilling mud enters in tubular structure from the open rearward end of tubular structure, drilling mud
It pushes guide sleeve to move forward (similar piston motion) with main shaft, while being stretched out with dynamic cutter head from cutter head extending port, drilling machine driving
Disconnecting device rotates integrally, and provides power for cutter head, and cutter head cuts stuck drill sleeve, after the completion of cutting, when pressure disappearance, leads
It is moved backward to set by the elastic force of compressed spring, while main shaft being driven to move backward, cutter head is recovered in cutter head accommodating chamber, most
After take out disconnecting device, top drill sleeve is recycled.
The positive effect of the present invention: cutting operation can be carried out interior any position to drilling rod, casing in the borehole, utmostly
Recycling drilling in stuck drilling rod, casing, save the cost.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is use state diagram of the present invention；
Fig. 3 is pressing sleeve internal sectional enlarged drawing of the present invention；
In figure: pressing sleeve 1, hex bolts 2, hex nut 3, round nut 4, front pad 5, guide sleeve 6, main shaft 7, O-ring 8, spring
Set 9, compressed spring 10, pin shaft 11, cutter head 12, main body 13, top 14, rear gasket 15, cutter head accommodating chamber 16, cutter head extending port
17, steel pipe 1, steel pipe 2 19, drilling 20, in place protector A, regulator hole B, one C of discharge orifice, two D of discharge orifice, dredging flow groove E,
Three F of discharge orifice.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples:
A kind of drill bushing pipe well internal cutting off device, comprising pressing sleeve 1, guide sleeve 6, main shaft 7, spring pocket 9, compressed spring 10, pin shaft 11,
Cutter head 12, main body 13 and top 14, the pressing sleeve 1 are connected with spring pocket 9, form tubular structure, guide sleeve 6, main shaft 7 and pressure
Contracting spring 10 is arranged in tubular structure, and guide sleeve 6 is fixed on main shaft 7, and compressed spring 10 is arranged on main shaft 7, compresses bullet
For spring 10 between guide sleeve 6 and tubular structure front end, guide sleeve 6, main shaft 7, compressed spring 10 and tubular structure form piston
Structure；Main body 13 is connected with the front end of tubular structure, and main body 13 is cylindrical-shaped structure, and inside is equipped with cutter head accommodating chamber 16, main
13 rear and front end of body is open, and is connected with cutter head accommodating chamber 16；Top 14 are inserted into master by the front opening of main body 13
In the cutter head accommodating chamber 16 of body 13, the front end of main shaft 7 enters the cutter head accommodating chamber of main body 13 by the open rearward end of main body 13
In 16, cutter head 12 is arranged in cutter head accommodating chamber 16, and 12 rear end of cutter head is hinged by pin shaft 11 and 7 front end of main shaft, main body 13
Side wall is equipped with the cutter head extending port 17 being connected with cutter head accommodating chamber, and 12 side of cutter head is in contact with top 14, and cutter head 12 is another
Side is in contact with the internal chamber wall of cutter head accommodating chamber 16.
The inside of the main shaft 7 is equipped with one C of discharge orifice of strip, is respectively equipped with and lets out on the side wall of 7 rear and front end of main shaft
Discharge orifice three F and regulator hole B, three F of discharge orifice are connected with regulator hole B by one C of discharge orifice, and hex bolts 2 passes through hex nut 3
It is entered in one C of discharge orifice of main shaft 7 afterwards, the side wall of hex bolts is in contact with regulator hole B；The front end of tubular structure is equipped with and lets out
Chute E, three F of discharge orifice are connected by dredging flow groove E with the cutter head accommodating chamber of main body 13.
The side wall of the guide sleeve 6 is equipped with the protector A in place of annular, and the side wall of tubular structure is equipped with and protects in place
Two D of discharge orifice that protecting groove A matches.
Be additionally provided with annular seal groove on 6 side wall of guide sleeve, O-ring 8 is arranged in annular seal groove, guide sleeve 6 with
It is sealed between spring pocket 9 by O-ring 8.
It include also round nut 4, front pad 5 and rear gasket 15, front pad 5 and rear gasket 15 are separately positioned on guide sleeve 6
Two sides, front pad 5 pass through the round nut 4 being arranged on main shaft 7 and are fastened with guide sleeve 6, and rear gasket 15 is arranged in compressed spring
Between 10 and guide sleeve 6.
The quantity of the front pad 5 and rear gasket 15 is at least one.
The front end of the cutter head 12 is equipped with arcuation chamfering.
The cutter head extending port 17 is two.
A kind of application method of drill bushing pipe well internal cutting off device, using above-mentioned disconnecting device, steps are as follows:
1. enabling disconnecting device to decline in steel pipe 2 19 to be cut in 1 upper end joint steel pipe 1 of pressing sleeve, working as cutting
When device reaches the position that steel pipe 2 19 needs to cut off, stop decline；
2. being supplied water with slush pump into steel pipe 1, guide sleeve 6, which is pressurized, drives compressed spring 10 to compress, and main shaft 7 enters cutter head
In accommodating chamber 16, water flow is entered in cutter head accommodating chamber 16 by regulator hole B, one C of discharge orifice and three F of discharge orifice, most afterwards through knife
Head extending port 17 is discharged in steel pipe 2 19 and drilling 20；When steel pipe 2 19 or drilling 20 start to return water upwards, mud is adjusted
To 0.5MPa or so, cutter head 12 stretches out outside main body 13 water supplying pump pressure from cutter head extending port 17 at this time, light with 2 19 inner wall of steel pipe
Micro- contact；
3. the slow rotating steel tube 1 of drilling machine on ground drives disconnecting device slowly to rotate, between cutter head 12 and steel pipe 2 19
Relative motion is formed, cutter head 12 starts pipe cutting 2 19, and at this time due to just starting to cut, the operation of cutter head is unstable, centainly
It to rotate at a slow speed；When cutter head 12 cuts into steel pipe 2 19 inner wall a part, after disconnecting device runs smoothly, the confession of slush pump is adjusted
Water pressure improves the revolving speed of steel pipe 1, carries out fly-cutting to 1-2MPa；
4. the inner cavity of tubular structure passes through the A of protector in place and discharge orifice on 6 side wall of guide sleeve when steel pipe 2 19 is cut off
Two D connection, the water flow in tubular structure is released in steel pipe 2 19 by protector A in place and two D of discharge orifice, through steel pipe 2 19
Inner cavity returns to ground；Slush pump pressure of supply water is minimized at this time, can stop slush pump, when pressure is stablized in hole to be drilled 20, is used
Steel pipe 1 proposes disconnecting device, then the steel pipe 2 19 cut off is taken out, that is, completes operation.
The regulator hole B has 4 or 6, is interspersed on 7 side wall of main shaft, and the center of all regulator hole B is not at master
On the same circumferential section of axis 7, the area of passage for adjusting regulator hole B that hex bolts 2 can be small is turned, pressure is steadily adjusted.
In the present embodiment, in conjunction with attached drawing 1, cutter head is hinged on front-end of spindle by pin shaft, can move up and down with main shaft.?
It is top that cutter head is forced to rotate around pin shaft when main shaft moves down, so that point of a knife is leant out main body, completes the cutting to drill sleeve.When
When main shaft moves up, the internal chamber wall of cutter head accommodating chamber forces cutter head to recycle in main body, and the cutter head for enabling cutter head be hidden in main body accommodates
The intracavitary movement of drill sleeve that is intracavitary, facilitating the present invention to cut open in needs.Cutter head and main shaft, which move down, to be pushed by drilling mud
What piston structure was realized.When guide sleeve 6 reaches the front end of tubular structure, protector A is connected with two D of discharge orifice in place, probing
Mud is released along protector A in place through two D of discharge orifice, and fluid power reduces, and guide sleeve 6 and main shaft 7 are slightly mobile backward, stops cutter head
Only continue to stretch out, protects cutter head.It is to be pushed to realize by the elastic force of compressed spring that cutter head and main shaft, which move up,.Drilling mud pushes away
Action-oriented set is mobile while compressing compressed spring, stores mechanical energy, and when fluid power disappears, compressed spring pushes guide sleeve to drive master
Axis and cutter head are withdrawn.
The main body 13 is the cylindrical-shaped structure that rear and front end is open, along the circumferential direction upper inside it that two phases are arranged
The cutter head accommodating chamber 16 of connection, the opening in communication of cutter head accommodating chamber 16 and main body rear and front end, cutter head accommodating chamber 16 and main body
The internal chamber wall that the aperture position of rear end is connected is obliquely installed, and cutter head 12 is in contact with the internal chamber wall being obliquely installed.Cutter head
12 connect with main shaft 7 by pin shaft 11 it is integral, realize movement by main shaft 7 to cutter head conduction；Body front end opening is mounting hole,
For assembling top 14, stops cutter head 12 and main shaft 7 to move linearly, cutter head 12 is promoted to rotate around pin shaft, realize that cutter head 12 opens
Movement；Body rear is sequentially connected spring pocket 9 and pressing sleeve 1, forms the main structure of drill bushing pipe well internal cutting off device.
Spring pocket 9 is provided with guide sleeve 6 and compressed spring 10.Guide sleeve 6 is equipped with annular seal groove and in place protector
A is equipped with O-ring 8 on annular seal groove, realizes the sealing between guide sleeve 6 and spring pocket 9.6 both ends of guide sleeve are respectively equipped with number
Not equal front pad 5 and rear gasket 15, can adjust 15 number of front pad 5 and rear gasket number, be adjusted in place protector A and knife
First 12 stop the mutual alignment relation stretching out between the movement of main body 13.Guide sleeve 6, front pad 5 and rear gasket 15 pass through round nut 4
It is clamped on main shaft 7 with compressed spring 10, it is made to synthesize an entirety.
7 rear end of main shaft is equipped with hex bolts 2 and hex nut 3, can lean out tension to cutter head as needed and be adjusted, and adjusts
Save hex bolts 2, change regulator hole B area of passage size, make partial high pressure drilling mud by regulator hole B, one C of discharge orifice and
Three F of discharge orifice is discharged through cutter head accommodating chamber 16 along dredging flow groove E, adjusts uninterrupted of the drilling mud by disconnecting device, change
Drilling mud changes the size that cutter head 12 feeds cutting force to the pressure of guide sleeve 6, guarantees cutting construction safety and cutter head
Service life.
The application method of the present embodiment:
1, in 1 upper end joint steel pipe 1 of pressing sleeve, disconnecting device of the present invention is enable to decline in steel pipe 2 19 to be cut,
When disconnecting device reaches the position that steel pipe 2 19 needs to cut off, stop decline.
2, it is supplied water with slush pump into steel pipe 1, when steel pipe 2 19 or drills 20 when the part on ground starts to return water,
Slush pump pressure of supply water is adjusted to 0.5MPa or so.Cutter head 12 stretches out main body 13 at this time, with 2 19 inner wall gentle touchdown of steel pipe.
3, in the slow rotating steel tube 1 of ground drilling machine, disconnecting device is driven slowly to rotate, cutter head 12 and steel pipe 2 19
Between form relative motion, cutter head 12 starts pipe cutting 2 19, and at this time due to just starting to cut, the operation of cutter head is unstable,
It has to rotate at a slow speed.When cutter head 12 cuts into steel pipe 2 19 inner wall a part, after disconnecting device runs smoothly, adjustment slush pump
Pressure of supply water to 1-2MPa, improve the revolving speed of steel pipe one, carry out fly-cutting.
4, when being cut in view of cutter head 12, a possibility that disconnecting device is not in the center of steel pipe 2 19 larger, cutter head 12
Maximum opening dimension design it is 10mm bigger than the outer diameter of steel pipe 2 19.
5, regulator hole B has 4 or 6, and the center all regulator hole B is not on same circumferential section, and hex bolts 2 turns
The area of passage of adjusting regulator hole B that can be small when adjusting pressure, steadily adjusts pressure.
6, when steel pipe 2 19 is cut off, the spring cavity connection of the A of protector in place and spring pocket 9 on 6 side wall of guide sleeve,
Water flows through two D of discharge orifice and releases, and returns to ground through 2 19 inner cavity of steel pipe.Slush pump pressure of supply water is minimized at this time, can termination of pumping
When pressure is stablized in hole to be drilled 20, disconnecting device is proposed with steel pipe 1.
Claims (9)
1. a kind of drill bushing pipe well internal cutting off device, it is characterised in that: include pressing sleeve (1), guide sleeve (6), main shaft (7), spring pocket
(9), compressed spring (10), pin shaft (11), cutter head (12), main body (13) and top (14), the pressing sleeve (1) and spring pocket (9)
It is connected, forms tubular structure, guide sleeve (6), main shaft (7) and compressed spring (10) is arranged in tubular structure, guide sleeve (6)
It is fixed on main shaft (7), is arranged on main shaft (7) compressed spring (10), compressed spring (10) is located at guide sleeve (6) and tubulose knot
Between structure front end, guide sleeve (6), main shaft (7), compressed spring (10) and tubular structure form piston structure；Main body (13) and pipe
The front end of shape structure is connected, and main body (13) is cylindrical-shaped structure, and inside is equipped with cutter head accommodating chamber (16), two before and after main body (13)
End is open, and is connected with cutter head accommodating chamber (16)；Top (14) are inserted into main body by the front opening of main body (13)
(13) in cutter head accommodating chamber (16), the front end of main shaft (7) enters the knife of main body (13) by the open rearward end of main body (13)
In head accommodating chamber (16), in cutter head accommodating chamber (16), cutter head (12) rear end passes through pin shaft (11) and main shaft for cutter head (12) setting
(7) front end is hinged, and the side wall of main body (13) is equipped with the cutter head extending port (17) being connected with cutter head accommodating chamber, cutter head (12) one
Side is in contact with top (14), and cutter head (12) other side is in contact with the internal chamber wall of cutter head accommodating chamber (16).
2. a kind of drill bushing pipe well internal cutting off device according to claim 1, it is characterised in that: the inside of the main shaft (7)
Discharge orifice one (C) equipped with strip is respectively equipped with discharge orifice three (F) and regulator hole on the side wall of main shaft (7) rear and front end
(B), discharge orifice three (F) is connected with regulator hole (B) by discharge orifice one (C), after hex bolts (2) passes through hex nut (3)
It enters in the discharge orifice one (C) of main shaft (7), the side wall of hex bolts is in contact with regulator hole (B)；The front end of tubular structure is set
Have dredging flow groove (E), discharge orifice three (F) is connected by dredging flow groove (E) with the cutter head accommodating chamber of main body (13).
3. a kind of drill bushing pipe well internal cutting off device according to claim 1 or 2, it is characterised in that: the guide sleeve (6)
Side wall is equipped with the protector in place (A) of annular, and the side wall of tubular structure is equipped with the aerial drainage to match with protector in place (A)
Hole two (D).
4. a kind of drill bushing pipe well internal cutting off device according to claim 3, it is characterised in that: guide sleeve (6) side wall
On be additionally provided with annular groove, O-ring (8) is arranged in annular groove, passes through O-ring between guide sleeve (6) and spring pocket (9)
(8) it seals.
5. a kind of drill bushing pipe well internal cutting off device according to claim 1 or 2, it is characterised in that: also include round nut
(4), front pad (5) and rear gasket (15), front pad (5) and rear gasket (15) are separately positioned on the two sides of guide sleeve (6), foremast
Piece (5) is fastened by the round nut (4) being arranged on main shaft (7) with guide sleeve (6), and rear gasket (15) is arranged in compressed spring
(10) between guide sleeve (6).
6. a kind of drill bushing pipe well internal cutting off device according to claim 5, it is characterised in that: the front pad (5) and after
The quantity of gasket (15) is at least one.
7. a kind of drill bushing pipe well internal cutting off device according to claim 1 or 2, it is characterised in that: the cutter head (12)
Front end is equipped with arcuation chamfering.
8. a kind of application method of drill bushing pipe well internal cutting off device is filled using cutting off defined by claim 1-7 any one
It sets, it is characterised in that following steps:
1. enable disconnecting device decline in steel pipe two (19) to be cut in pressing sleeve (1) upper end joint steel pipe one (18),
When disconnecting device reaches the position that steel pipe two (19) need to cut off, stop decline；
2. being supplied water with slush pump in steel pipe one (18), guide sleeve (6), which is pressurized, drives compressed spring (10) compression, main shaft (7) into
Enter into cutter head accommodating chamber (16), water flow enters cutter head receiving by regulator hole (B), discharge orifice one (C) and discharge orifice three (F)
In chamber (16), most it is discharged in steel pipe two (19) and drilling (20) through cutter head extending port (17) afterwards；When steel pipe two (19) or drilling
(20) start upwards when returning water, adjustment slush pump pressure of supply water to 0.5MPa or so, cutter head (12) is from cutter head extending port at this time
(17) main body (13) are stretched out outside, with steel pipe two (19) inner wall gentle touchdown；
3. the slow rotating steel tube one (18) of drilling machine on ground drives disconnecting device slowly to rotate, cutter head (12) and steel pipe two
(19) relative motion is formed between, cutter head (12) starts pipe cutting two (19), at this time due to just starting to cut, the operation of cutter head
It is unstable, it has to rotate at a slow speed；When cutter head (12) cuts into steel pipe two (19) inner wall a part, disconnecting device runs smoothly
Afterwards, the pressure of supply water of slush pump is adjusted to 1-2MPa, is improved the revolving speed of steel pipe one (18), is carried out fly-cutting；
4. when steel pipe two (19) is cut off, the inner cavity of tubular structure by protector in place (A) on guide sleeve (6) side wall with
Discharge orifice two (D) connection, the water flow in tubular structure release steel pipe two by protector (A) in place and discharge orifice two (D)
(19) in, ground is returned to through steel pipe two (19) inner cavity；Slush pump pressure of supply water is minimized at this time, can stop slush pump, to be drilled
When hole (20) interior pressure is stablized, disconnecting device is proposed with steel pipe one (18), then the steel pipe two (19) cut off is taken out, that is, is completed
Operation.
9. a kind of application method of drill bushing pipe well internal cutting off device according to claim 8, it is characterised in that: the pressure regulation
Hole (B) there are four or six, be interspersed on main shaft (7) side wall, the center of all regulator holes (B) be not at same circumference cut
On face, the area of passage for the adjusting regulator hole (B) that hex bolts (2) can be small is turned, pressure is steadily adjusted.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110359871A true CN110359871A (en) | 2019-10-22 |
| CN110359871B CN110359871B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910814905.5A Active CN110359871B (en) | 2019-08-30 | 2019-08-30 | Cutting device in drill sleeve well and use method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN110359871B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058787A (en) * | 2019-11-20 | 2020-04-24 | 中国海洋石油集团有限公司 | Positioning hydraulic internal cutting knife and oil pipe cutting method |
| CN113021191A (en) * | 2019-12-24 | 2021-06-25 | 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 |
|---|---|---|---|---|
| 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 |
| 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 |
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| 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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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111058787A (en) * | 2019-11-20 | 2020-04-24 | 中国海洋石油集团有限公司 | Positioning hydraulic internal cutting knife and oil pipe cutting method |
| CN113021191A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气股份有限公司 | Experimental system for abrasive water jet cutting sleeve |
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| CN110359871B (en) | 2024-03-12 |
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