CN218117729U - A outer cutting device for jumbo size well casing - Google Patents
A outer cutting device for jumbo size well casing Download PDFInfo
- Publication number
- CN218117729U CN218117729U CN202222119277.9U CN202222119277U CN218117729U CN 218117729 U CN218117729 U CN 218117729U CN 202222119277 U CN202222119277 U CN 202222119277U CN 218117729 U CN218117729 U CN 218117729U
- Authority
- CN
- China
- Prior art keywords
- detonator
- shell
- casing
- cutting device
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model discloses an external cutting device for large-size underground casing, which comprises a fixed seat, a charging shell and a guide cylinder which are arranged in sequence from top to bottom, wherein a milling cylinder mounting joint is arranged in the fixed seat, and an annular shaped charge cover is arranged in the charging shell; the space in the fixed seat, the charge shell, the guide cylinder, the milling cylinder mounting joint and the annular shaped charge cover is a sleeve setting space; the space between the charge shell and the annular shaped charge cover is a main charge bin which is used for filling main charges; a pair of detonation units is arranged on the top surface of the charge shell, and the bottom ends of the detonation units are embedded in main charges filled in the main charge bin. The utility model discloses an outer cutting device for jumbo size is casing pipe in pit, its cutting ability is stronger, and the cutting success rate is higher. In addition, due to the fact that the loading amount is large, high-energy detonation waves can be generated after blasting, the high-energy detonation waves can achieve a loosening effect on a cement layer in the casing, and fishing construction of the subsequent casing is easier to conduct.
Description
Technical Field
The utility model belongs to the technical field of oil gas well transformation and accident handling, relate to oil gas well casing pipe cutting in the pit, concretely relates to outer cutting device for jumbo size well casing pipe in pit.
Background
With the continuous development of oil fields, partial oil-gas wells need to be modified to meet the requirements of different process construction due to the requirements of casing damage repair of oil layer casings, development and adjustment of lower layer systems, urban construction and the like. In the transformation process, due to the limitation of the underground casing, part of transformation measures cannot be effectively implemented, so that the underground casing needs to be cut to achieve the purpose of process transformation.
The existing underground casing cutting technology has the following defects:
first, the cutting ability of the conventional internal cutting device is limited, so that when a large-size downhole casing is subjected to cutting, due to insufficient cutting ability, cutting failure is easily caused, and subsequent casing removal repair is affected.
Second, at present, a retracting drill bit is often used to match with a milling barrel to salvage the cut underground casing and cutting device. Then, for a large-size underground casing, due to the size limitation of the casing, a drawing drill bit is put in for casing milling and fish collecting, so that a fault-broken well accident of the drill bit is easy to occur, further the salvaging of the underground casing fails, and the subsequent casing taking repair is influenced.
Disclosure of Invention
Not enough to prior art exists, the utility model aims to provide an outer cutting device for jumbo size downhole casing, solve prior art and when cutting the operation to the large size downhole casing, the technical problem that the cutting success rate remains further to improve.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
an external cutting device for large-size underground casings comprises a fixed seat, a charging shell and a guide cylinder which are sequentially arranged from top to bottom, wherein a milling cylinder mounting joint is mounted in the top of the fixed seat, and an annular shaped charge cover is coaxially arranged in the charging shell; the axial both ends of fixing base, powder charge casing, guide cylinder, cover mill a section of thick bamboo erection joint and annular shaped charge cover all open, the space in fixing base, powder charge casing, guide cylinder, cover mill a section of thick bamboo erection joint and the annular shaped charge cover sets up the space for the sleeve pipe.
The space between the charge shell and the annular shaped charge liner is a main charge bin which is used for filling main charges; a pair of detonation units are arranged on the top surface of the explosive charging shell, the pair of detonation units are oppositely arranged on two sides of the fixed seat, and the bottom ends of the detonation units are embedded in main explosive charges filled in the main explosive charging bin.
The utility model discloses still have following technical characteristic:
the detonation unit comprises a detonator shell mounting joint arranged on the top surface of the explosive charge shell, the bottom of the detonator shell is mounted on the detonator shell mounting joint, and a detonator shell sealing joint is mounted in the top of the detonator shell; the space enclosed by the detonator shell, the detonator shell mounting joint and the detonator shell sealing joint is a detonator cabin, and a detonator is mounted in Lei Guancang.
The top surface of the explosive charging shell is provided with a plurality of detonating cord jacks, the center of the detonator shell mounting joint is provided with a detonating cord penetrating hole, detonating cords are arranged in the detonating cord jacks and the detonating cord penetrating hole, the top end of the detonating cord is connected with a detonator, and the bottom end of the detonating cord is embedded in main explosive charged in the main explosive charging bin.
And a detonator detonating lead wire jack is formed in the center of the sealing joint of the detonator shell.
A sealing ring is arranged between the sealing joint of the detonator shell and the detonator shell, and a sealing ring is arranged between the detonator shell and the mounting joint of the detonator shell.
The bottom of the sealing joint of the detonator shell is arranged in the top of the detonator shell, and a basket ring is integrally arranged on the top end of the sealing joint of the detonator shell.
The guide cylinder comprises a guide cylinder top surface, a guide cylinder outer wall and a guide cylinder inner wall, and the guide cylinder top surface is fixedly connected to the bottom surface of the charge shell; the guide cylinder top surface be ring form structure, the guide cylinder outer wall is hollow radius platform column structure, the guide cylinder inner wall is hollow round platform column structure, the bottom of guide cylinder outer wall is connected with the bottom of guide cylinder inner wall.
The annular shaped charge liner comprises a charge liner wall and a discharge liner wall which are integrally arranged, and the joint of the charge liner wall and the discharge liner wall is a bent end; the upper medicine type cover wall is of a hollow round platform-shaped structure, and the lower medicine type cover wall is of a hollow round platform-shaped structure.
The fixed seat and the milling sleeve mounting joint are provided with a plurality of mounting holes, fixing bolts are arranged in the mounting holes, and the fixed seat and the milling sleeve mounting joint are fixedly connected through the mounting holes and the fixing bolts.
Compared with the prior art, the utility model, following technological effect has:
(I) the utility model discloses an outer cutting device for jumbo size is casing in pit compares with traditional interior cutting device, because the charge in outer cutting device's main explosive storehouse is bigger, consequently cutting ability is stronger, and the cutting success rate is higher. In addition, due to the fact that the loading amount is large, high-energy detonation waves can be generated after blasting, the high-energy detonation waves can achieve a loosening effect on a cement layer in the casing, and fishing construction of the subsequent casing is easier to conduct.
(I) the utility model discloses an outer cutting device for jumbo size is casing pipe in pit need not to go into down and draws the drill bit after the cutting operation is accomplished, only needs to lift by crane the cover and mills a section of thick bamboo and just can realize cutting device's salvage.
Drawings
Fig. 1 is a schematic view showing the overall construction of an outer cutting apparatus for a large-sized downhole casing.
Fig. 2 is a schematic structural view of the detonating unit.
FIG. 3 is a schematic structural view of the annular liner.
FIG. 4 is a schematic representation of the construction of an outer cutting device for large size downhole casing.
FIG. 5 is a simulation of an outer cutting device for a large size downhole casing.
The meaning of each reference number in the figures is: 1-a fixed seat, 2-a charging shell, 3-a guide cylinder, 4-a milling cylinder mounting joint, 5-an annular shaped charge cover, 6-a sleeve setting space, 7-a main charging bin, 8-a detonating unit, 9-an detonating cord jack, 10-a mounting hole, 11-a fixing bolt, 12-a sleeve to be cut, 13-an oil pipe, 14-a cement layer, 15-an oil well to be operated and 16-a milling cylinder;
301-guide cylinder top surface, 302-guide cylinder outer wall, 303-guide cylinder inner wall;
501-upper medicine type cover wall, 502-lower medicine type cover wall, 503-turning end;
801-detonator shell installation joint, 802-detonator shell, 803-detonator shell sealing joint, 804-Lei Guancang, 805-detonator, 806-detonating cord penetrating hole, 807-detonating cord, 808-detonator detonating lead jack, 809-basket ring and 810-sealing ring.
The following examples are provided to explain the present invention in further detail.
Detailed Description
The utility model discloses in:
by large size downhole casing is meant casing with a diameter of 13.3 inches or more.
It should be noted that all the components used in the present invention are known in the art, and the components are not specifically described.
Obey above-mentioned technical scheme, following the present utility model discloses a specific embodiment, it needs to explain that the utility model discloses do not confine following specific embodiment to, all fall into the protection scope of the utility model to the equivalent transform of doing on the basis of this application technical scheme.
Example (b):
the embodiment provides an external cutting device for a large-size downhole casing, which comprises a fixed seat 1, a charging shell 2 and a guide cylinder 3 which are sequentially arranged from top to bottom as shown in fig. 1, wherein a milling cylinder mounting joint 4 is mounted in the top of the fixed seat 1, and an annular shaped charge cover 5 is coaxially arranged in the charging shell 2; the axial both ends of fixing base 1, powder charge casing 2, guide cylinder 3, cover mill a section of thick bamboo erection joint 4 and annular shaped charge cover 5 are all opened, and the space in fixing base 1, powder charge casing 2, guide cylinder 3, cover mill a section of thick bamboo erection joint 4 and the annular shaped charge cover 5 sets up space 6 for the sleeve pipe.
A main explosive loading bin 7 is arranged in a space between the explosive loading shell 2 and the annular shaped charge cover 5, and the main explosive loading bin 7 is used for loading main explosive; be provided with a pair of detonating unit 8 on the top surface of powder charge casing 2, a pair of detonating unit 8 sets up in the both sides of fixing base 1 relatively, and the bottom of detonating unit 8 is buried in the main charge that loads in main powder charge storehouse 7.
In this embodiment, fixed connection is realized through the welded mode to fixing base 1, powder charge casing 2 and guide cylinder 3, and annular shaped charge cover 5 is fixed to be set up in powder charge casing 2 through the welded mode.
In this embodiment, the main explosive loading bin 7 has a large explosive loading amount, and when the cutting operation is performed, the explosive loosening is caused on the cement layer 14 between the casing 12 to be cut and the oil pipe 13, so that the casing 12 to be cut and the oil pipe 13 above the cutting position can be recovered later.
As a specific solution of this embodiment, as shown in fig. 2, the detonation unit 8 includes a detonator shell mounting joint 801 disposed on the top surface of the charge shell 2, the detonator shell mounting joint 801 is mounted with the bottom of a detonator shell 802, and a detonator shell sealing joint 803 is mounted in the top of the detonator shell 802; the space enclosed by the detonator shell 802, the detonator shell mounting joint 801 and the detonator shell sealing joint 803 is a detonator bin 804, and a detonator 805 is mounted in the detonator bin 804.
A plurality of detonating cord inserting holes 9 are formed in the top surface of the explosive charging shell 2, a detonating cord penetrating hole 806 is formed in the center of the detonator shell mounting joint 801, detonating cords 807 are arranged in the detonating cord inserting holes 9 and the detonating cord penetrating hole 806, the top ends of the detonating cords 807 are connected with a detonator 805, and the bottom ends of the detonating cords 807 are embedded in main explosive charges filled in the main explosive charging bin 7.
In this embodiment, the detonating cord threading hole 806 and the detonating cord inserting hole 9 are used for threading a wire, and are also used for pouring main explosive into the main explosive bin 7, the main explosive is waterproof explosive known in the prior art, and the waterproof explosive has lower requirements on the sealing performance of the device, so that the requirements on the device material in the manufacturing process are lower.
In this embodiment, the detonator shell mounting fitting 801 is fixedly disposed on the charge shell 2 by welding.
As a specific scheme of this embodiment, as shown in fig. 2, a detonator detonating lead insertion hole 808 is formed at the center of the detonator shell sealing joint 803. In this embodiment, a detonator detonating lead is disposed in the detonator detonating lead jack 808, one end of the detonator detonating lead is connected to the detonator 805, and the other end of the detonator detonating lead is connected to an external detonator, which is known in the art.
As a specific scheme of this embodiment, as shown in fig. 2, the bottom of the detonator shell sealing joint 803 is installed in the top of the detonator shell 802, a basket ring 809 is integrally provided on the top end of the detonator shell sealing joint 803, and a detonator detonating lead is wound on the basket ring 809 for fixing.
As a specific aspect of the present embodiment, as shown in fig. 2, a seal ring 810 is provided between the detonator shell sealing joint 803 and the detonator shell 802, and a seal ring 810 is provided between the detonator shell 802 and the detonator shell mounting joint 801.
As a specific scheme of this embodiment, as shown in fig. 1, the guiding cylinder 3 includes a guiding cylinder top surface 301, a guiding cylinder outer wall 302 and a guiding cylinder inner wall 303, and the guiding cylinder top surface 301 is fixedly connected to the bottom surface of the powder charging housing 2; guide cylinder top surface 301 is the ring structure, and guide cylinder outer wall 302 is hollow round platform column structure, and guide cylinder inner wall 303 is hollow round platform column structure, and the bottom of guide cylinder outer wall 302 is connected with the bottom of guide cylinder inner wall 303.
In this embodiment, the top surface 301 of the guide cylinder, the outer wall 302 of the guide cylinder and the inner wall 303 of the guide cylinder are arranged in an inverted triangle structure, which can reduce the fluid resistance; the guide cylinder 3 is of a hollow structure, so that the whole weight of the device can be reduced, and the lifting difficulty is reduced.
As a specific solution of this embodiment, as shown in fig. 3, the annular liner 5 includes an upper liner wall 501 and a lower liner wall 502 that are integrally disposed, and a joint of the upper liner wall 501 and the lower liner wall 502 is a turning end 503; the upper liner 501 has a hollow truncated cone-shaped structure, and the lower liner 502 has a hollow inverted truncated cone-shaped structure.
As a specific scheme of this embodiment, as shown in fig. 1, a plurality of mounting holes 10 are formed in the fixing base 1 and the milling sleeve mounting joint 4, fixing bolts 11 are disposed in the mounting holes 10, and the fixing base 1 and the milling sleeve mounting joint 4 are fixedly connected through the mounting holes 10 and the fixing bolts 11. In this embodiment, the mounting hole 10 is a strip-shaped hole so as to adjust the position of the fixing bolt 11.
As shown in fig. 4, the assembly and operation principle of the present invention are as follows:
firstly, weld annular shaped charge cover 5 in powder charge casing 2, then weld fixing base 1 and guide cylinder 3 on the top surface and the bottom surface of powder charge casing 2, install milling sleeve erection joint 4 in fixing base 1 again.
Second, the main charge is poured into the main charge bin 7 and the detonating cord 807 is embedded, and then the detonator 805, the detonator shell 802, the detonator shell sealing joint 803 and the sealing ring 810 are installed.
Fourthly, the sleeve milling barrel 16 is installed on the sleeve milling barrel installation joint 4, then a detonator detonating lead, the sleeve milling barrel 16 and the cutting device are slowly lowered into the oil well 15 to be operated from the wellhead, the cutting device is sleeved outside the sleeve 12 to be cut and is continuously lowered until the cutting device reaches a specified cutting position, an external detonator is started to detonate the detonator 805, detonation wave energy generated after the detonator 805 is detonated is transmitted into the main device explosive bin 7 through the detonating cord 807, and after main charges in the main device explosive bin 7 are detonated, metal jet flow is formed by matching with the annular explosive type cover 5, and the sleeve 12 to be cut is cut.
Fifthly, after the cutting is finished, the cutting device is salvaged by using the milling sleeve 16, and then the salvage operation is carried out on the cut casing.
Effect verification:
in this embodiment, taking a 13.3 inch casing as an example, the cutting capability of the oil and gas downhole casing external cutting device is subjected to explosion mechanics simulation analysis, the cutting depth is 25cm, and the result is shown in fig. 5.
Claims (8)
1. The external cutting device for the large-size underground casing is characterized by comprising a fixed seat (1), a charge shell (2) and a guide cylinder (3) which are sequentially arranged from top to bottom, wherein a milling cylinder mounting joint (4) is mounted in the top of the fixed seat (1), and an annular shaped charge cover (5) is coaxially arranged in the charge shell (2); the axial two ends of the fixed seat (1), the charging shell (2), the guide cylinder (3), the milling cylinder mounting joint (4) and the annular shaped charge cover (5) are all open, and the space in the fixed seat (1), the charging shell (2), the guide cylinder (3), the milling cylinder mounting joint (4) and the annular shaped charge cover (5) is a sleeve setting space (6);
a main explosive loading bin (7) is arranged in a space between the explosive loading shell (2) and the annular shaped charge cover (5), and the main explosive loading bin (7) is used for loading main explosive; a pair of detonation units (8) is arranged on the top surface of the explosive charging shell (2), the pair of detonation units (8) are oppositely arranged on two sides of the fixed seat (1), and the bottom ends of the detonation units (8) are embedded in main explosive charges filled in the main explosive charging bin (7).
2. The external cutting device for large size downhole casings according to claim 1, wherein the detonating unit (8) comprises a detonator shell mounting sub (801) arranged on the top surface of the charge shell (2), the detonator shell mounting sub (801) having the bottom of the detonator shell (802) mounted thereon, the detonator shell sealing sub (803) being mounted in the top of the detonator shell (802); a space surrounded by the detonator shell (802), the detonator shell mounting joint (801) and the detonator shell sealing joint (803) is a detonator bin (804), and a detonator (805) is mounted in the detonator bin (804);
the top surface of the explosive charging shell (2) is provided with a plurality of detonating cord inserting holes (9), the center of a detonator shell mounting joint (801) is provided with a detonating cord penetrating hole (806), detonating cords (807) are arranged in the detonating cord inserting holes (9) and the detonating cord penetrating hole (806), the top ends of the detonating cords (807) are connected with a detonator (805), and the bottom ends of the detonating cords (807) are embedded in main explosive charges filled in the main explosive charging bin (7).
3. The external cutting device for large size downhole casing according to claim 2, wherein a detonator initiation lead insertion hole (808) is formed at the center of the detonator shell sealing joint (803).
4. The external cutting device for large-size downhole casings as claimed in claim 2, wherein the bottom of the detonator shell sealing sub (803) is mounted in the top of the detonator shell (802), and a basket ring (809) is integrally arranged on the top end of the detonator shell sealing sub (803).
5. The external cutting device for large size downhole casing according to claim 2, wherein a sealing ring (810) is arranged between the detonator casing sealing joint (803) and the detonator casing (802), and a sealing ring (810) is arranged between the detonator casing (802) and the detonator casing mounting joint (801).
6. The external cutting device for large-size downhole casings according to claim 1, wherein the guiding cylinder (3) comprises a guiding cylinder top surface (301), a guiding cylinder outer wall (302) and a guiding cylinder inner wall (303), the guiding cylinder top surface (301) is fixedly connected to the bottom surface of the charge housing (2); guide cylinder top surface (301) be the annular structure, guide cylinder outer wall (302) be hollow round platform column structure, guide cylinder inner wall (303) are hollow round platform column structure, the bottom of guide cylinder outer wall (302) is connected with the bottom of guide cylinder inner wall (303).
7. The external cutting device for large-sized downhole casings as claimed in claim 1, wherein the annular liner (5) comprises an upper liner wall (501) and a lower liner wall (502) which are integrally arranged, and a joint of the upper liner wall (501) and the lower liner wall (502) is a turning end (503); the upper medicine-shaped cover wall (501) is of a hollow truncated cone-shaped structure, and the lower medicine-shaped cover wall (502) is of a hollow inverted truncated cone-shaped structure.
8. The external cutting device for the large-size downhole casing according to claim 1, wherein a plurality of mounting holes (10) are formed in the fixing seat (1) and the milling sleeve mounting joint (4), fixing bolts (11) are arranged in the mounting holes (10), and the fixing seat (1) and the milling sleeve mounting joint (4) are fixedly connected through the mounting holes (10) and the fixing bolts (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222119277.9U CN218117729U (en) | 2022-08-11 | 2022-08-11 | A outer cutting device for jumbo size well casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222119277.9U CN218117729U (en) | 2022-08-11 | 2022-08-11 | A outer cutting device for jumbo size well casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218117729U true CN218117729U (en) | 2022-12-23 |
Family
ID=84521998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222119277.9U Active CN218117729U (en) | 2022-08-11 | 2022-08-11 | A outer cutting device for jumbo size well casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218117729U (en) |
-
2022
- 2022-08-11 CN CN202222119277.9U patent/CN218117729U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU749082B1 (en) | Blasting apparatus for forming horizontal underground cavities and blasting method using the same | |
| CN108132006B (en) | Anti-clogging quick well formation undercut blast hole arragement construction and its blasting method | |
| CN110118084B (en) | Ultra-deep shaft construction method | |
| CN102808621B (en) | Method for blasting heavy-inclined thick ore bodies | |
| CN109870084B (en) | VCR mining method hole-sweeping-free blasting charge structure and construction method thereof | |
| WO2006045248A1 (en) | A high-energy gas fracture tool for through-tubing operation | |
| CN202814253U (en) | Blasting explosive charging structure in water accumulation hole or water seepage hole | |
| WO2010129794A2 (en) | High pressure/deep water perforating system | |
| US4919050A (en) | Well perforating device | |
| CN218117729U (en) | A outer cutting device for jumbo size well casing | |
| CN111998742A (en) | Construction method for forming deep well through one-time blasting | |
| US5791821A (en) | Shaped-charge cutting device for piles and underwater tubular members | |
| CN111721169B (en) | Blasting excavation damage control method for offshore rock-socketed pile foundation | |
| CN107401401A (en) | A kind of horizontal well explosion fracturing modernization system and method | |
| CN111521082A (en) | One-time well completion method by matching high-pass shaft and medium-length hole sectional blasting in raise-boring construction | |
| CN210570276U (en) | Detonation explosion-proof tube for sectionally and alternately charging closed space | |
| CN108061492A (en) | A kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 0.8-1m | |
| CN108240193A (en) | A kind of coal bed gas horizontal well card-dispelling tubular pile and method | |
| CN116696342A (en) | Front cabin type secondary explosion composite perforation method for coal-bed gas well | |
| CN109900175B (en) | Low-damage blasting method for underground mine roadway tunneling | |
| CN212512756U (en) | Weak blasting system of drilling bored concrete pile boulder deep hole | |
| CN210603016U (en) | Explosion-proof and delay explosion-transmitting device for explosive filling in segmented and spaced closed space | |
| WO2017062396A1 (en) | Shock mitigation devices | |
| GB2096675A (en) | Method of removing an inner conduit which is grouted in an outer conduit | |
| CN206513307U (en) | Drill CUMULATIVE BLASTING device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |