CN107035332A - A kind of tubing string internal cutter - Google Patents
A kind of tubing string internal cutter Download PDFInfo
- Publication number
- CN107035332A CN107035332A CN201710266639.8A CN201710266639A CN107035332A CN 107035332 A CN107035332 A CN 107035332A CN 201710266639 A CN201710266639 A CN 201710266639A CN 107035332 A CN107035332 A CN 107035332A
- Authority
- CN
- China
- Prior art keywords
- cutter
- main body
- cutter block
- block
- tubing string
- 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.)
- Withdrawn
Links
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 discloses a kind of tubing string internal cutter, it includes top connection, main body and the plug being sequentially connected；It is provided with the middle part of main body in cutter seat, cutter seat and is provided with cutter block；The stretching direction of cutter block is vertical with the axis of main body；It is provided with the anterior main body of cutter block in cutter block drive mechanism, the main body at cutter block rear portion and is provided with cutter block resetting-mechanism；Cutter block is completed from the stretching in cutter seat or rebounded by cutter block drive mechanism and cutter block resetting-mechanism.The internal cutter of the present invention is connected to bolt special and bores bottom, and the choke pressure using top connection flow nipple is poor, makes guide way descending, cutter block is under main body axially position, can only be with guide way it is descending protruding radially from the body, with the rotation of cutter, realize the continuous cutting to tubing string；After cutting terminates, in the presence of lower body part spring force, the reset of cutter block is realized, body interior is recovered to；The cutting knife realizes hilted broadsword block radial cuts, and efficiency high, the moment of torsion required for work is small, and performance is stable.
Description
Technical field
The present invention relates to oil well kit field, and in particular to a kind of tubing string internal cutter.
Background technology
In workover treatment, after down-hole string is by very big lifting force, it is impossible to stir tubing string, many times need
Tubing string is cut off inside tubing string, goes out from the place of cutting off after tubing string on again and repaiies processing.Have sometimes for the top of cutting pipe portion position
Undergauge, and supporting helicoid hydraulic motor is when can not provide sufficiently large moment of torsion, can not carry out normally cutting off work using common cutter
Industry.
The content of the invention
For problems of the prior art, it is an object of the invention to provide a kind of tubing string internal cutter, it is effectively solved
Determine problems of the prior art.
To achieve the above object, the present invention uses following technical scheme：
A kind of tubing string internal cutter, the tubing string internal cutter includes top connection, main body and the plug being sequentially connected；Wherein, institute
State and cutter seat is provided with the middle part of main body, cutter block is provided with the cutter seat；In the stretching direction of the cutter block and main body
Axis is vertical；It is provided with the anterior main body of cutter block in cutter block drive mechanism, the main body at cutter block rear portion and is provided with cutter block reset machine
Structure；Cutter block is completed from the stretching in cutter seat or rebounded by the cutter block drive mechanism and the cutter block resetting-mechanism.
Further, the cutter block drive mechanism is to be provided with guiding on the guide way being arranged in main body, the guide way
Hole, the alignment pin of the cutter block is adapted with the pilot hole.
Further, the cutter block resetting-mechanism includes being arranged on main body internal stop and back-moving spring；Wherein, the block
Rear end is connected with the front end of the guide way, and the front end of block is connected with one end of the back-moving spring, back-moving spring it is another
End is limited in main body by the plug.
Further, flow nipple and flow nipple positioning sleeve are provided with the top connection.
Further, the cutter block is made up of alignment pin and cutter block main body two parts；The front end of the cutter block main body is provided with
Point of a knife.
The present invention has following advantageous effects：
The internal cutter of the present invention is connected to bolt special and bores bottom, and the choke pressure using top connection flow nipple is poor, makes to lead
It is descending to body, cutter block under main body axially position, can only be with guide way it is descending protruding radially from the body, with cutter
Rotation, realize continuous cutting to tubing string；After cutting terminates, in the presence of lower body part spring force, answering for cutter block is realized
Position, is recovered to body interior；The cutting knife realizes hilted broadsword block radial cuts, and efficiency high, the moment of torsion required for work is small, and performance is steady
It is fixed.
Brief description of the drawings
Fig. 1 is the partial sectional view of the embodiment of the present invention；
Fig. 2 is the structural representation of the cutter block of the embodiment of the present invention；
In figure：1- top connections, 2- flow nipples, 3- flow nipples positioning sleeve, 4- main bodys, 5- guide ways, 6- cutter blocks, 6.1- positioning
Pin, 6.2- cutter blocks main body, 6.3- points of a knife, 7- blocks, 8- back-moving springs, 9- plugs, 10- cutteves seat, 11- pilot holes.
Embodiment
Below, refer to the attached drawing, is more fully illustrated to the present invention, shown in the drawings of the exemplary implementation of the present invention
Example.However, the present invention can be presented as a variety of multi-forms, the exemplary implementation for being confined to describe here is not construed as
Example.And these embodiments are to provide, so that the present invention is fully and completely, and it will fully convey the scope of the invention to this
The those of ordinary skill in field.
For ease of explanation, space relative terms such as " on ", " under " " left side " " right sides " can be used herein, for saying
The element or feature shown in bright figure is relative to another element or the relation of feature.It should be understood that except in figure
Outside the orientation shown, spatial terminology is intended to include the different azimuth of device in use or operation.If for example, in figure
Device is squeezed, be stated as being located at other elements or feature " under " element will be located into other elements or feature " on ".Cause
This, exemplary term " under " both upper and lower orientation can be included.Device, which can be positioned otherwise, (to be rotated by 90 ° or is located at
Other orientation), can correspondingly it be explained used herein of the relative explanation in space.
As shown in Figure 1-2, the invention provides a kind of tubing string internal cutter, the tubing string internal cutter include be sequentially connected on connect
First 1, main body 4 and plug 9；Wherein, the middle part of main body 4 is provided with cutter seat 10, cutter seat 10 and is provided with cutter block 6；Cutter block 6
Stretch out direction vertical with the axis of main body 4；Cutter block drive mechanism is provided with the anterior main body 4 of cutter block 6, the rear portion of cutter block 6
Cutter block resetting-mechanism is provided with main body 4；Cutter block 6 is completed out of cutter seat 10 by cutter block drive mechanism and cutter block resetting-mechanism
Stretching or rebound.
Cutter block drive mechanism is that pilot hole 11 is provided with the guide way 5 being arranged in main body 4, guide way 5, cutter block 6
Alignment pin 6.1 is adapted with pilot hole 11.The front end of pilot hole 11 is straight, and rear end is tilted down, and the guide way 5 is in main body 4
Interior feeding, alignment pin 6.1 stretches out in the presence of pilot hole 11 out of cutter seat 10.
Cutter block resetting-mechanism includes being arranged on the internal stop 7 of main body 4 and back-moving spring 8；Wherein, the rear end of block 7 and guiding
The front end connection of body 5, the front end of block 7 is connected with one end of back-moving spring 8, and the other end of back-moving spring 8 is limited by plug 9
In main body 4.
Flow nipple 2 and flow nipple positioning sleeve 3 are provided with top connection 1.
Cutter block 6 is made up of alignment pin 6.1 and the two parts of cutter block main body 6.2；The front end of cutter block main body 6.2 is provided with point of a knife
6.3。
The operation principle of the application is：
The down-hole string cutter of the present invention is connected to the helicoid hydraulic motor bottom that bottom carries pressure guide hole, on helicoid hydraulic motor
Portion connects anchor, bottom connection centralizer and tubing string internal cutter, and being lowered into underground with tubing string precuts behind tubing string position, handling
Seated anchor makes cutter axially position in tubing string, and ground pump truck is with certain displacement operation, the screw rod in the presence of hydraulic coupling
Drilling tool starts rotary work, by the throttling of flow nipple 2, obtains optimal cutting feed speed, tubing string is cut from inside to outside
It is disconnected.After cutting terminates, under spring force, guide way 5 is up, and cutter block 6 is withdrawn, and rises to cut tubing string.
It is described above simply to illustrate that of the invention, it is understood that the invention is not limited in above example, meet
The various variants of inventive concept are within protection scope of the present invention.
Claims (5)
1. a kind of tubing string internal cutter, it is characterised in that the tubing string internal cutter includes top connection (1), the main body (4) being sequentially connected
With plug (9)；Wherein, it is provided with the middle part of the main body (4) in cutter seat (10), the cutter seat (10) and is provided with cutter block
(6)；The stretching direction of the cutter block (6) is vertical with the axis of main body (4)；Knife is provided with the anterior main body (4) of cutter block (6)
Cutter block resetting-mechanism is provided with block drive mechanism, the main body (4) at cutter block (6) rear portion；Cutter block (6) passes through the cutter block driving machine
Structure and the cutter block resetting-mechanism complete from the stretching in cutter seat (10) or rebounded.
2. tubing string internal cutter according to claim 1, it is characterised in that the cutter block drive mechanism is to be arranged on main body
(4) pilot hole (11), the alignment pin (6.1) of the cutter block (6) and institute are provided with the guide way (5) in, the guide way (5)
Pilot hole (11) is stated to be adapted.
3. tubing string internal cutter according to claim 2, it is characterised in that the cutter block resetting-mechanism includes being arranged on main body
(4) internal stop (7) and back-moving spring (8)；Wherein, the rear end of the block (7) is connected with the front end of the guide way (5), gear
The front end of block (7) is connected with one end of the back-moving spring (8), and the other end of back-moving spring (8) is limited by the plug (9)
In main body (4).
4. tubing string internal cutter according to claim 1, it is characterised in that be provided with flow nipple (2) on the top connection (1)
And flow nipple positioning sleeve (3).
5. tubing string internal cutter according to claim 1, it is characterised in that the cutter block (6) is by alignment pin (6.1) and knife
Block main body (6.2) two parts are constituted；The front end of the cutter block main body (6.2) is provided with point of a knife (6.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710266639.8A CN107035332A (en) | 2017-04-21 | 2017-04-21 | A kind of tubing string internal cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710266639.8A CN107035332A (en) | 2017-04-21 | 2017-04-21 | A kind of tubing string internal cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107035332A true CN107035332A (en) | 2017-08-11 |
Family
ID=59536207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710266639.8A Withdrawn CN107035332A (en) | 2017-04-21 | 2017-04-21 | A kind of tubing string internal cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107035332A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425158A (en) * | 2019-01-10 | 2020-07-17 | 中国石油天然气股份有限公司 | Oil well downhole pipe column cutting device and using method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2130580A (en) * | 1935-09-26 | 1938-09-20 | Buckles James | Inside pipe cutter |
| CN2580098Y (en) * | 2002-07-31 | 2003-10-15 | 詹景峰 | Oil pipe grinding and cutting device |
| CN201786301U (en) * | 2010-08-11 | 2011-04-06 | 山东正元地质资源勘查有限责任公司烟台分公司 | Three-head hydraulic cutting knife |
| US20130341048A1 (en) * | 2012-06-20 | 2013-12-26 | Its Tubular Services (Holdings) Limited | Hydraulically Triggered Anchor |
| CN204511348U (en) * | 2015-04-08 | 2015-07-29 | 沈旭 | A kind of abandoned well novel multi-layer casing cutting device |
| CN205778657U (en) * | 2016-05-31 | 2016-12-07 | 托普威尔石油技术股份公司 | A kind of down-hole string internal cutter |
| CN206681692U (en) * | 2017-04-21 | 2017-11-28 | 托普威尔石油技术股份公司 | A kind of tubing string internal cutter |
-
2017
- 2017-04-21 CN CN201710266639.8A patent/CN107035332A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2130580A (en) * | 1935-09-26 | 1938-09-20 | Buckles James | Inside pipe cutter |
| CN2580098Y (en) * | 2002-07-31 | 2003-10-15 | 詹景峰 | Oil pipe grinding and cutting device |
| CN201786301U (en) * | 2010-08-11 | 2011-04-06 | 山东正元地质资源勘查有限责任公司烟台分公司 | Three-head hydraulic cutting knife |
| US20130341048A1 (en) * | 2012-06-20 | 2013-12-26 | Its Tubular Services (Holdings) Limited | Hydraulically Triggered Anchor |
| CN204511348U (en) * | 2015-04-08 | 2015-07-29 | 沈旭 | A kind of abandoned well novel multi-layer casing cutting device |
| CN205778657U (en) * | 2016-05-31 | 2016-12-07 | 托普威尔石油技术股份公司 | A kind of down-hole string internal cutter |
| CN206681692U (en) * | 2017-04-21 | 2017-11-28 | 托普威尔石油技术股份公司 | A kind of tubing string internal cutter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425158A (en) * | 2019-01-10 | 2020-07-17 | 中国石油天然气股份有限公司 | Oil well downhole pipe column cutting device and using method thereof |
| CN111425158B (en) * | 2019-01-10 | 2023-12-22 | 中国石油天然气股份有限公司 | Downhole tubular column cutting device for oil well and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170811 |