CN108915629A - It is a kind of for cutting the novel hydropower cutter device of multilayer sleeve - Google Patents
It is a kind of for cutting the novel hydropower cutter device of multilayer sleeve Download PDFInfo
- Publication number
- CN108915629A CN108915629A CN201810884909.6A CN201810884909A CN108915629A CN 108915629 A CN108915629 A CN 108915629A CN 201810884909 A CN201810884909 A CN 201810884909A CN 108915629 A CN108915629 A CN 108915629A
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- China
- Prior art keywords
- cutter
- piston
- gag lever
- lever post
- cutting
- 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.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 claims description 17
- 238000004064 recycling Methods 0.000 claims description 14
- 238000005553 drilling Methods 0.000 abstract description 17
- 239000012530 fluid Substances 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B29/12—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 specially adapted for underwater installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
It is a kind of, for the abandoned well operation of deep water well head, to be cut wellhead casing pipe by the present apparatus for cutting the novel hydropower cutter device of multilayer sleeve, it is recycled convenient for wellhead assembly.Its technical solution：Drilling fluid pushes piston to move down, and then piston driving cutter is around pin rotation, thus cutter Casing-Cutting；When cutter, which is cut, to be completed, piston circumferential through-hole is connected to gag lever post radial through-hole, and obvious pressure difference occurs in drilling liquid pressure at this time, may determine that casing-pipe cutting is completed according to the fluctuation of drilling liquid pressure；Increase blade support structure in cutter end, realizes that blade smoothly recycles.Operation of the present invention is simple, can effectively judge that casing-pipe cutting is completed, and by adjusting relief hole relative distance, may be implemented to cut different-diameter multilayer sleeve.
Description
Technical field
The present invention relates to a kind of for cutting the novel hydropower cutter device of multilayer sleeve, belongs to offshore oil gas water
Lower wellhead casing pipe cuts field.
Background technique
With the continuous development of marine oil and gas, more and more oil/gas wells were lost and are continued to use close to service life
Value, to prevent oil vapour pollution, for reaching the subsea well mouth of the operation time limit, if without other purposes, according to country
Regulation needs to carry out it abandoned well operation, however the key technology in abandoned well operation process is casing-pipe cutting.Underwater well at present
There are the following problems for mouth casing-pipe cutting：(1) it cannot effectively judge whether casing-pipe cutting is completed；(2) after the completion of casing-pipe cutting, cutter
Withdrawal cannot be gone on smoothly；(3) multilayer sleeve of different-diameter cannot continuously be cut
To solve the above-mentioned problems, underwater well head casing cutting device is had developed both at home and abroad.External Logan Oil Tools
The hydraulic cutter of company and the research and development of Pioneer Oils Tools Limited is cut by the pressure-driven that drilling fluid generates
Knife, which carries out cutting, can disposably complete multilayer sleeve cutting, and will appear apparent pressure reduction when the cut is completed and show to cut
It has been completed that, but the cutting blade of two companies all cannot be actively recovered in cutter ontology.And the domestic patent No.
A kind of cutting of CN201679464U, which expands effective hydraulic inner cutter, joined centring means to effectively prevent cutter deflection
The problem of, and judge whether casing-pipe cutting is completed using the variation of drilling rod torque, add spring leaf using in cutter body exterior
Form recycling cutter enter cutter body interior, the shortcomings that device is：Unobvious, external spring is judged using change in torque
Piece does not have safety：Stretching outside spring leaf when drilling rod is transferred may make camber of spring excessive and follow the string.The patent No.
CN107288566A once completes the pressure release type hydraulic cutter that multilayer is cut
No cutting is completed, but is not had cutter and recycled function.
Summary of the invention
The purpose of the present invention：In order to effectively judge whether casing cuts completion, the present invention increases pressure release in cutter device
Function, when cutter, which is cut, to be completed, obvious pressure drop occurs for drilling pump, may determine that casing-pipe cutting is completed at this time.In order to realize difference
The cutting of multilayer sleeve can replace different limit sleeves, to adjust the relative distance between gag lever post and piston relief hole.
In order to which the cutter of opening to be retracted into cutter ontology, invention increases cutter support devices to realize cutter drawing back function.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
It is a kind of for cutting the novel hydropower cutter device of multilayer sleeve, mainly by connecting rod, nozzle, gag lever post, limit
Set, piston, sealing silk plug, cutter, pin, postive stop baffle, recycling baffle and cutter ontology composition, it is characterised in that：The company
Extension bar is threadedly coupled with cutter ontology, and cutter ontology is circumferentially evenly equipped with cutter groove, and cutter groove is interior to be fixed with cutter, cutter energy by pin
It is enough to be rotated by axle center of pin shaft；The cutter body interior successively has gag lever post, limit sleeve and piston；Described gag lever post one end with
Cutter ontology is threadedly coupled, and the other end stretches in piston body axially extending bore, and limit boom end is close to connecting rod direction screw thread
It is connected with nozzle；The limit sleeve is threadedly coupled cutter ontology, and limit sleeve end is contacted with limit boom end；The piston with cut
It is provided with annular space between knife ontology and spring is installed, the top and bottom of spring are respectively by the shoulder of piston and cutter ontology
Shoulder limit, piston successively have recycling baffle and postive stop baffle in one end far from gag lever post, and recycling baffle is nested in outside piston
Surface opposite can simultaneously be slided, and postive stop baffle is connect with piston thread, is recycled and is provided with spring between baffle and postive stop baffle, returns
Baffle is received to contact with cutter end always under spring force.
Further, the pistons end has axially extending bore and axial bypass blind hole, circumferentially there is radial by-pass prot, radial to bypass
Hole is connected to axial bypass blind hole and piston axially extending bore, and piston axially extending bore is ellipse, piston and cutter body contacts portion
Set up separately and is equipped with sealing ring.
Further, the gag lever post is T-type shape, and gag lever post larger diameter end is provided centrally with axially extending bore and surrounding is uniformly distributed
There is eccentric through-hole, gag lever post smaller diameter end and piston axially extending bore are slidably connected and are circumferentially evenly equipped with through-hole, gag lever post week
It can be connected to through-hole with piston radial by-pass prot, gag lever post reduced diameter section section is ellipse, gag lever post and piston sliding contact
Part is provided with sealing ring.
Further, the piston radial bypass outer end of hole is equipped with sealing silk plug, and it is axial other that sealing silk plug cannot protrude into piston
In logical blind hole.
Further, the shoulder of cutter ontology radially has male structure, has on piston and matches with cutter ontology convex architecture
Groove, piston can be moved up and down along cutter ontology shoulder.
Compared with prior art, the beneficial effects of the invention are as follows：1) the underwater cutter device of the utility model uses gag lever post
The pressure reduction of interconnected realization drilling pump between relief hole and piston radial by-pass prot, ground installation can be by obvious
Pressure drop judge whether casing cuts completion；2) increase cutter recyclable device in cutter ontology, it, can when cutter, which is cut, to be completed
Smoothly to withdraw cutter, prevent cutter from scratching casing；3) increase the support construction of cutter, it is ensured that each cutter when circumgyration incision
Point of a knife in the same horizontal line, reduces the generation of oval cutting, improves cutting stability, reduces vibration, be conducive to safety
High-speed cutting.4) limit sleeve of different height can be replaced, to adjust the relative distance of the relief hole of gag lever post and piston, is fitted
For various sizes of multilayer sleeve cutting operation, operating efficiency, save the cost are improved.
Detailed description of the invention
A kind of novel hydropower cutter of Fig. 1 present invention opens figure
The direction A cross-section diagram in Fig. 2 Fig. 1 of the present invention
The direction B cross-section diagram in Fig. 3 Fig. 1 of the present invention
C sectional view in Fig. 4 Fig. 1 of the present invention
Fig. 5 gag lever post plan view of the present invention
Fig. 6 cutter of the present invention retracts view
In figure, 1. connecting rods, 2. nozzles, 3. gag lever posts, 3a. gag lever post axially extending bore, 3b. gag lever post circumferential through-hole, 3c.
Gag lever post eccentric through-hole, 4. limit sleeves, 5. pistons, 5a. piston axially extending bore, 5b. piston axially bypass blind hole, 5c. piston diameter
To by-pass prot, 6. sealing silk plugs, 7. springs I, 8. pins, 9. cutteves, 10. postive stop baffles, 11. springs II, 12. recycle baffles,
13. sealing ring, 14. cutter ontologies, 15. screws
Specific implementation method
The present invention is not limited by following embodiments, can be determined according to the technique and scheme of the present invention with actual conditions
Specific embodiment.The present invention is once described below with reference to Fig. 1.The positional relationship of upper and lower, left and right etc. is that foundation is said
The layout direction of bright book attached drawing 1 determines.
As shown in Figure 1 and Figure 4, a kind of for cutting the novel hydropower cutter device of multilayer sleeve, mainly by connecting rod 1,
Nozzle 2, gag lever post 3, limit sleeve 4, piston 5, sealing silk plug 6, cutter 9, pin 8, postive stop baffle 10, recycling baffle 12 and cutter
Ontology 14 forms, it is characterised in that：The connecting rod 1 is threadedly coupled with cutter ontology 14, and cutter ontology 14 is circumferential to be evenly equipped with knife
Slot, cutter groove is interior to be fixed with cutter 9 by pin 8, and cutter 9 can be rotated by axle center of pin shaft；Inside the cutter ontology 14 according to
It is secondary to have gag lever post 3, limit sleeve 4 and piston 5；Described 3 one end of gag lever post is threadedly coupled with cutter ontology 14, and the other end stretches in work
It fills in axially extending bore 5a, 3 end of gag lever post is being threaded with nozzle 2 close to 1 direction of connecting rod；4 screw thread of limit sleeve connects
Cutter ontology 14 is connect, 4 end of limit sleeve is contacted with 3 end of gag lever post；Annular space is provided between the piston 5 and cutter ontology 14
And spring is installed, the top and bottom of spring are limited by the shoulder of the shoulder of piston 5 and cutter ontology 14 respectively, and piston 5 exists
Successively there are recycling baffle 12 and postive stop baffle 10 in one end far from gag lever post 3, and recycling baffle 12 is nested in 5 outer surface of piston and can
To move up and down along piston, postive stop baffle 10 is threadedly coupled with piston 5, is recycled and is provided with bullet between baffle 12 and postive stop baffle 10
Spring, recycling baffle 12 are contacted with 9 end of cutter always under spring force.
As depicted in figs. 1 and 2, there are axially extending bore 5a and axial bypass blind hole 5b in 5 end of piston, circumferentially there is radial by-pass prot
5c, radial by-pass prot 5c are connected to axial bypass blind hole 5b and piston axially extending bore 5a, piston 5 and 14 contact portion of cutter ontology
It is provided with sealing ring.
As shown in Figure 1, Figure 2 and shown in Fig. 5, the gag lever post 3 is T-type shape, and 3 larger diameter end of gag lever post is provided centrally with axial direction
Through-hole 3a and it is uniformly distributed on peripheries with eccentric through-hole 3c, 3 smaller diameter end of gag lever post and 5 axially extending bore of piston are slidably connected and circumferential
It is evenly equipped with through-hole 3b, gag lever post circumferential through-hole 3b can be connected to piston radial by-pass prot 5c, gag lever post 3 and 5 sliding contact of piston
Part is provided with sealing ring.
As shown in Figure 1, the outer end piston radial by-pass prot 5c is equipped with sealing silk plug 6, sealing silk plug 6 cannot protrude into piston
In 5 axial bypass blind holes.
As shown in figures 1 and 3, the shoulder of cutter ontology 14 radially has male structure, has on piston 5 and cutter ontology convex knot
The groove that structure matches, piston can be moved up and down along cutter ontology shoulder.Or in shoulder radially installed pin, pin with cut
The cooperation of knife body recess, and limit cutter ontology and rotate in a circumferential direction, only moved axially along piston
As shown in fig. 6, will be done further in detail to a kind of novel hydropower cutter device for being used to cut multilayer sleeve below
Explanation.
Preparation before work：According to the suitable limit sleeve 4 of the maximum the choice of diameter of Casing-Cutting.After being completed, on ground
It is tested on face, verifying cutter 9 can work normally.
In the course of work：After underwater cutter reaches designated position, it is passed through drilling fluid.When just starting, drilling fluid is from connection
The runner that bar 1 flows through nozzle 2, gag lever post 3 and piston 5 flows downward, and another part drilling fluid flows through gag lever post 3 circumferential 4 and leads to
Hole, then circumferential 4 blind holes of piston 5 are flowed to through limit sleeve 4.Due to start time, it is radial that 3 radial through-hole of gag lever post is located at piston 5
Through-hole lower end, 5 through-hole of piston are not connected to 3 radial through-hole of gag lever post, and drilling fluid cannot flow.Due to the throttling action of nozzle 2,
Drilling fluid generates pressure consumption in nozzle 2, and valve rod is longer, and drilling fluid generates friction loss when flowing through gag lever post 3, this two parts
The fluid pressure that pressure consumption generates pushes 5 downlink of piston, and piston 5 pushes 9 upper end downlink of cutter, due to cutter 9 and cutter ontology
It is connected between 14 by pin shaft, then cutter 9 is opened around pin shaft rotation expansion, and the circumferential Casing-Cutting under drilling rod drive.Cutter 9
End contacts always with recycling baffle 12, and 9 end of cutter pushes recycling 12 downlink of baffle, the elasticity generated due to the compression of spring II
Restoring force generates support force to cutter 9, it is ensured that the point of a knife of each cutter 9 in the same horizontal line, subtracts when 9 circumgyration incision of hydraulic cutter
The generation of few oval cutting, improves cutting stability and safety.
Judgement cutting is completed：When cutting is completed, 5 downlink power of piston is equal with the restoring force that spring I generates, at this time gag lever post
3 radial through-hole are connected to 5 radial through-hole of piston, and wherein another part drilling fluid is flowed from gag lever post 3 and 5 radial communication hole of piston
Out, the pressure drop generated at this time is significantly lower than the pressure drop in cutter normal operation, therefore the significant changes for passing through pressure drop on platform can
To judge whether cutting is completed.
Cutter retracts process：After observing that significant change has occurred in pressure drop, it is meant that casing-pipe cutting is completed, and is stopped at this time
It is passed through drilling fluid, the uplink under the effect of I restoring force of spring of cutter 9 pushes cutter 9 to withdraw, and pushes 5 uplink of piston, makes cutter 9
It withdraws completely.
After cutter 9 is withdrawn completely, drill string is above mentioned, if suspending weight increases, and can be carried, so that it may underwater well head system
By mentioning on platform on outer hanging tool, the cutting recycling operation of entire casing is completed.
Claims (5)
1. a kind of novel hydropower cutter device for Casing-Cutting, mainly by connecting rod, nozzle, gag lever post, limit sleeve, work
Plug, sealing silk plug, cutter, pin, postive stop baffle, recycling baffle and cutter ontology composition, it is characterised in that：The connecting rod with
Cutter ontology is threadedly coupled, and cutter ontology is circumferentially evenly equipped with cutter groove, and cutter groove is interior to be fixed with cutter by pin, and cutter can be with pin
Axis is axle center rotation；The cutter body interior successively has gag lever post, limit sleeve and piston；Described gag lever post one end and cutter sheet
Body is threadedly coupled, and the other end stretches in piston body axially extending bore, and limit boom end is threaded with close to connecting rod direction
Nozzle；The limit sleeve is threadedly coupled cutter ontology, and limit sleeve end is contacted with limit boom end；The piston and cutter ontology
Between be provided with annular space and spring be installed, the top and bottom of spring are limited by the shoulder of the shoulder of piston and cutter ontology respectively
Position；Piston successively has recycling baffle and postive stop baffle in one end far from gag lever post, and recycling baffle is nested in outer surface of piston simultaneously
It opposite can be slided with piston, postive stop baffle is connect with piston thread, is recycled and is provided with spring between baffle and postive stop baffle, recycles
Baffle is contacted with cutter end always under spring force.
2. a kind of novel hydropower cutter device for Casing-Cutting according to claim 1, it is characterised in that：Pistons end
There are axially extending bore and axial bypass blind hole, circumferentially has radial by-pass prot, radial by-pass prot and axial bypass blind hole and piston axial
Through-hole connection, piston and cutter body contacts part are provided with sealing ring.
3. according to claim 1 with a kind of 2 novel hydropower cutter devices for Casing-Cutting, it is characterised in that：It is described
Gag lever post is T-type shape, and gag lever post larger diameter end is provided centrally with axially extending bore and is uniformly distributed on peripheries with eccentric through-hole, and gag lever post is small
Diameter end and piston axially extending bore opposite can slide and circumferentially be evenly equipped with circumferential through-hole, and gag lever post circumferential through-hole can be with piston diameter
It is connected to by-pass prot, gag lever post and piston slidably contacting section are provided with sealing ring.
4. according to claim 1 with a kind of 2 novel hydropower cutter devices for Casing-Cutting, it is characterised in that：It is described
Piston radial bypasses outer end of hole and is equipped with sealing silk plug, and sealing silk plug cannot protrude into piston axial direction bypass blind hole.
5. a kind of novel hydropower cutter device for Casing-Cutting according to claim 1, it is characterised in that：Cutter ontology
Shoulder radially have male structure, have the groove matched with cutter ontology convex architecture on piston, piston can be along cutter ontology
Shoulder moves up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810884909.6A CN108915629B (en) | 2018-08-06 | 2018-08-06 | Hydraulic cutting knife device for cutting multilayer sleeves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810884909.6A CN108915629B (en) | 2018-08-06 | 2018-08-06 | Hydraulic cutting knife device for cutting multilayer sleeves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108915629A true CN108915629A (en) | 2018-11-30 |
| CN108915629B CN108915629B (en) | 2020-11-03 |
Family
ID=64393494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810884909.6A Expired - Fee Related CN108915629B (en) | 2018-08-06 | 2018-08-06 | Hydraulic cutting knife device for cutting multilayer sleeves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108915629B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577897A (en) * | 2019-01-25 | 2019-04-05 | 无锡中钻地质装备有限公司 | A kind of drilling rod casing ripper |
| CN110644940A (en) * | 2019-11-08 | 2020-01-03 | 中国石油大学(北京) | Mechanical and electric cutting device for single-cylinder double-well casing of oil well |
| CN112483032A (en) * | 2019-09-11 | 2021-03-12 | 中国石油天然气股份有限公司 | Cutting device |
| CN112761562A (en) * | 2021-01-20 | 2021-05-07 | 中海油田服务股份有限公司 | Casing pipe cutting knife device and using method thereof |
| CN114215490A (en) * | 2021-10-29 | 2022-03-22 | 西南石油大学 | Hydraulic control remote monitoring sleeve cutter |
| CN114458200A (en) * | 2020-11-18 | 2022-05-10 | 中国海洋石油集团有限公司 | Underwater wellhead cutting and recycling tool and using method thereof |
| CN114607304A (en) * | 2022-02-25 | 2022-06-10 | 中海油能源发展股份有限公司 | Method for calculating axial distance of cutting notch and blade abrasion length of multilayer eccentric sleeve |
| CN114876395A (en) * | 2022-04-11 | 2022-08-09 | 四川中能数智科技发展有限公司 | Cement sheath eccentric rolling extrusion crushing tool with long service life and recovery assistance of sleeve |
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| US5150755A (en) * | 1986-01-06 | 1992-09-29 | Baker Hughes Incorporated | Milling tool and method for milling multiple casing strings |
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| EP2960428A3 (en) * | 2014-06-25 | 2017-03-01 | Services Pétroliers Schlumberger | Cutting insert for initiating a cutout |
| CN107288566A (en) * | 2017-08-02 | 2017-10-24 | 西南石油大学 | Once complete the pressure release type hydraulic cutter of multilayer cutting |
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2018
- 2018-08-06 CN CN201810884909.6A patent/CN108915629B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5150755A (en) * | 1986-01-06 | 1992-09-29 | Baker Hughes Incorporated | Milling tool and method for milling multiple casing strings |
| CN2502004Y (en) * | 2001-08-22 | 2002-07-24 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Hydraulic inner cutter |
| CN201943620U (en) * | 2011-02-10 | 2011-08-24 | 天合石油集团汇丰石油装备股份有限公司 | Multilayer casing pipe cutting knife |
| EP2960428A3 (en) * | 2014-06-25 | 2017-03-01 | Services Pétroliers Schlumberger | Cutting insert for initiating a cutout |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577897A (en) * | 2019-01-25 | 2019-04-05 | 无锡中钻地质装备有限公司 | A kind of drilling rod casing ripper |
| CN112483032A (en) * | 2019-09-11 | 2021-03-12 | 中国石油天然气股份有限公司 | Cutting device |
| CN112483032B (en) * | 2019-09-11 | 2022-06-03 | 中国石油天然气股份有限公司 | Cutting device |
| CN110644940A (en) * | 2019-11-08 | 2020-01-03 | 中国石油大学(北京) | Mechanical and electric cutting device for single-cylinder double-well casing of oil well |
| CN114458200A (en) * | 2020-11-18 | 2022-05-10 | 中国海洋石油集团有限公司 | Underwater wellhead cutting and recycling tool and using method thereof |
| CN112761562A (en) * | 2021-01-20 | 2021-05-07 | 中海油田服务股份有限公司 | Casing pipe cutting knife device and using method thereof |
| CN114215490A (en) * | 2021-10-29 | 2022-03-22 | 西南石油大学 | Hydraulic control remote monitoring sleeve cutter |
| CN114607304A (en) * | 2022-02-25 | 2022-06-10 | 中海油能源发展股份有限公司 | Method for calculating axial distance of cutting notch and blade abrasion length of multilayer eccentric sleeve |
| CN114876395A (en) * | 2022-04-11 | 2022-08-09 | 四川中能数智科技发展有限公司 | Cement sheath eccentric rolling extrusion crushing tool with long service life and recovery assistance of sleeve |
| CN114876395B (en) * | 2022-04-11 | 2023-09-22 | 四川中能数智科技发展有限公司 | Cement ring eccentric rolling extrusion crushing tool for recycling long-service-life auxiliary sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108915629B (en) | 2020-11-03 |
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