CN101709635A - Six-stage branch well branching mechanism leading-in device - Google Patents
Six-stage branch well branching mechanism leading-in device Download PDFInfo
- Publication number
- CN101709635A CN101709635A CN200910220196A CN200910220196A CN101709635A CN 101709635 A CN101709635 A CN 101709635A CN 200910220196 A CN200910220196 A CN 200910220196A CN 200910220196 A CN200910220196 A CN 200910220196A CN 101709635 A CN101709635 A CN 101709635A
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- CN
- China
- Prior art keywords
- branch
- guide shoe
- main hole
- bifurcated
- hole
- 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.)
- Pending
Links
- 239000000956 alloy Substances 0.000 claims abstract description 4
- 230000008676 import Effects 0.000 claims description 34
- 238000003466 welding Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Abstract
A six-level branch well branching mechanism leading-in device for oil-gas multi-branch well completion of an oil field is composed of a branching connection mechanism, a main shaft pipe column, a main shaft leading-in guide shoe, a branch shaft leading-in guide shoe and a branch shaft pipe column; the branch connecting mechanism is made of expandable alloy materials, the branch shaft leading-in guide shoe is provided with an inclined opening structure, and the main shaft leading-in guide shoe is provided with an eccentric structure; the branch connecting mechanism is welded with the main shaft pipe column; the main shaft pipe column is fixedly connected with a main shaft leading-in guide shoe through a pin, the branch shaft leading-in guide shoe is fixedly connected with a branch shaft pipe column through a pin, and the branch connecting mechanism is welded with the branch shaft pipe column; the device has solved the problem that the water conservancy leakproofness and the mechanical integrity of window can't be realized to the quadruple branch well that exists among the prior art. The invention can be widely used for well completion operation of oil-gas multi-branch wells in oil fields.
Description
Technical field:
The present invention relates to a kind of lead-in device of branch mechanism for six-stage branch well that the oilfield multilateral well bores, completion is used.
Background technology:
The characteristics of Multilateral Wells are the casing programme complexity, and the well track great majority are horizontal well and high angle hole.Multilateral Wells has well and the oil reservoir contact area is big, characteristics such as well yield height, and the Multilateral Wells technology is all extensively promoted in the oil field both at home and abroad at present, and has obtained very big economic benefit.In completion practice, it at present mainly is the TAML4 grade branch well system of using, level Four Multilateral Wells completion satisfies the requirement of present oil reservoir development and oil production technology, the TAML4 grade branch well can't be realized the hydraulic seal and the mechanical integrity of window, TAML 6 grade branch well system windows have complete hydraulic seal, wider for particular oils gas reservoir window applicability, for promoting oil field development, improving recovery ratio can play a role.
Summary of the invention:
The purpose of this invention is to provide a kind of lead-in device of branch mechanism for six-stage branch well, this device solves the level Four Multilateral Wells completion system that exists in the prior art can't realize the water conservancy sealing and the mechanical integrity problem of window.
The technical solution adopted for the present invention to solve the technical problems is: a kind of lead-in device of branch mechanism for six-stage branch well, form by bifurcated bindiny mechanism, main hole tubing string, main hole importing guide shoe, branch's pit shaft importing guide shoe, branch's shaft column; Bifurcated bindiny mechanism makes with expandable alloy material, and it has expansiveness, very high mechanical strength; Branch's pit shaft imports guide shoe and is provided with the angle structure, and the characteristics that main hole imports guide shoe are to have eccentric structure; Bifurcated bindiny mechanism and main hole tubing string are welding; Main hole tubing string and main hole import guide shoe and are fastenedly connected with pin, and branch's pit shaft imports guide shoe and adopts pin to be fastenedly connected with the branch shaft column, and bifurcated bindiny mechanism is connected with branch shaft column employing welding manner; The present invention mainly is by a kind of special gatherer, and bifurcated mechanism in down-hole is imported in each branch well hole, and the eccentric structure shape and the size that rely on main hole to import guide shoe import in the main hole main hole tubing string; Rely on the angle structure of branch's pit shaft guide shoe that branch's tubing string is entered to come the packing branch well hole in branch's pit shaft, import success rate, the equal height of order of accuarcy makes the completion level reach 6 grades of levels of ATLM by 4 grades of ATLM.Sealing latter two branch simultaneously can reentry, and can carry out controllable individual well eye and recover the oil.On ground with this device with after running tool is connected, when being lowered into window, slowly transfer, because main hole imports guide shoe off-centre, institute is so that down-hole bifurcated mechanism, inclined to one side towards another direction, repeatedly handling makes main hole import guide shoe and enters into main hole inside, and the main hole tubing string is along with entering into main hole inside together like this.Because the space, down-hole is limited, branch's shaft column imports to branch well hole inside by the chamfered portion that branch's pit shaft imports guide shoe.So just finished the importing of down-hole bifurcated mechanism.
The invention has the beneficial effects as follows that the invention provides the gatherer of a kind of down-hole bifurcated mechanism, this device is to make it reach 6 grades of completion levels of ATLM on the basis of ATLM 4 grade branch wells; This device has simple in structure, imports success rate height, order of accuarcy height, characteristics that construction risk is little; Wide for all kinds of reservoir development usability, make the technology of six-grade branch well be able to perfect.
Description of drawings:
Accompanying drawing is an overall structure schematic diagram of the present invention.
Among the figure 1, branch's shaft column, 2, branch's pit shaft imports guide shoe, 3, main hole imports guide shoe, 4, the main hole tubing string, 5, bifurcated bindiny mechanism.
The specific embodiment:
In the drawings, a kind of lead-in device of branch mechanism for six-stage branch well, by branch's shaft column 1, branch's pit shaft imports guide shoe 2, and main hole imports guide shoe 3, main hole tubing string 4, bifurcated bindiny mechanism 5 forms; Bifurcated bindiny mechanism 5 makes with expandable alloy material, and it has expansiveness, very high mechanical strength; Branch's pit shaft imports guide shoe 2 and is provided with the angle structure, and the characteristics that main hole imports guide shoe 3 are to have eccentric structure; Bifurcated bindiny mechanism 5 is welding with main hole tubing string 4; Main hole tubing string 4 imports guide shoe 3 usefulness pins with main hole and is fastenedly connected, and branch's pit shaft imports guide shoe 2 and adopts pin to be fastenedly connected with branch's shaft column 1, and bifurcated bindiny mechanism 5 is connected with branch shaft column 1 employing welding manner; The present invention mainly is by a kind of special gatherer, and bifurcated mechanism in down-hole is imported in each branch well hole, and the eccentric structure shape and the size that rely on main hole to import guide shoe 3 import in the main hole main hole tubing string; The angle structure that relies on branch's pit shaft to import guide shoe 2 enters branch's shaft column 1 to come the packing branch well hole in branch's pit shaft, import success rate, order of accuarcy is all high, makes the completion level reach 6 grades of levels of ATLM by 4 grades of ATLM.Sealing latter two branch simultaneously can reentry, and can carry out controllable individual well eye and recover the oil.
Claims (1)
1. lead-in device of branch mechanism for six-stage branch well, by branch's shaft column (1), branch's pit shaft imports guide shoe (2), and main hole imports guide shoe (3), main hole tubing string (4), bifurcated bindiny mechanism (5) forms, and it is characterized in that; Bifurcated bindiny mechanism (5) makes with expandable alloy material, and it has expansiveness, very high mechanical strength; Branch's pit shaft imports guide shoe (2) and is provided with the angle structure, and the characteristics that main hole imports guide shoe (3) are to have eccentric structure; Bifurcated bindiny mechanism (5) is welding with main hole tubing string (4); Main hole tubing string (4) imports guide shoe (3) with main hole and is fastenedly connected with pin, and branch's pit shaft imports guide shoe (2) and adopts pin to be fastenedly connected with branch's shaft column (1), and bifurcated bindiny mechanism (5) adopts welding manner to be connected with branch's shaft column (1); The present invention mainly is by a kind of special gatherer, and bifurcated mechanism in down-hole is imported in each branch well hole, and the eccentric structure shape and the size that rely on main hole to import guide shoe (3) import in the main hole main hole tubing string; The angle structure that relies on branch's pit shaft to import guide shoe (1) enters branch's shaft column (1) to come the packing branch well hole in branch's pit shaft, import success rate, order of accuarcy is all high, makes the completion level reach ATLM (6) level level by ATLM (4) level.Sealing latter two branch simultaneously can reentry, and can carry out controllable individual well eye and recover the oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910220196A CN101709635A (en) | 2009-11-27 | 2009-11-27 | Six-stage branch well branching mechanism leading-in device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910220196A CN101709635A (en) | 2009-11-27 | 2009-11-27 | Six-stage branch well branching mechanism leading-in device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101709635A true CN101709635A (en) | 2010-05-19 |
Family
ID=42402441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910220196A Pending CN101709635A (en) | 2009-11-27 | 2009-11-27 | Six-stage branch well branching mechanism leading-in device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101709635A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967411A (en) * | 2013-01-29 | 2014-08-06 | 中国石油化工股份有限公司 | Parent well branching device, manufacturing method thereof and method for drilling branch wells by using same |
| CN104033121A (en) * | 2013-03-04 | 2014-09-10 | 中国石油化工股份有限公司 | Expansion device for underground branch system |
-
2009
- 2009-11-27 CN CN200910220196A patent/CN101709635A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967411A (en) * | 2013-01-29 | 2014-08-06 | 中国石油化工股份有限公司 | Parent well branching device, manufacturing method thereof and method for drilling branch wells by using same |
| CN104033121A (en) * | 2013-03-04 | 2014-09-10 | 中国石油化工股份有限公司 | Expansion device for underground branch system |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100519 |