CN103244070A - Five-level multilateral well seal tool - Google Patents
Five-level multilateral well seal tool Download PDFInfo
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- CN103244070A CN103244070A CN2013101629552A CN201310162955A CN103244070A CN 103244070 A CN103244070 A CN 103244070A CN 2013101629552 A CN2013101629552 A CN 2013101629552A CN 201310162955 A CN201310162955 A CN 201310162955A CN 103244070 A CN103244070 A CN 103244070A
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- drilled cavity
- main borehole
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- circular arc
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Abstract
The invention relates to multilateral well completion tool, in particular to a five-level multilateral well seal tool. A main borehole pre-reserved hole pipe side wall of the tool is provided with a branch hole. A lower connector is connected to the lower end of the main borehole pre-reserved hole pipe. An arc hollow deflector is mounted in the main borehole pre-reserved hole pipe. A multilateral well pre-reserved hole inserting tool is inserted into the main borehole pre-reserved hole pipe. An upper connector is connected to the upper end of the multilateral well pre-reserved hole inserting tool. An axial ditch and an annular ditch are machined on the outer wall where the multilateral well pre-reserved hole inserting tool is closely matched with the main borehole pre-reserved hole pipe. Seal rubber is vulcanized in the axial ditch and the annular ditch. An arc notch is obliquely machined on the upper end side pipe wall of the arc hollow deflector, and the arc pipe wall face at the notch is closely matched with the pipe wall oblique face of the multilateral well pre-reserved hole inserting tool. By the multilateral well completion tool, hydraulic seal can be performed at a multilateral well window, and mechanical connection can be provided for multilateral well borehole tubular piles.
Description
Technical field:
The present invention relates to a kind of Multilateral Wells completion tool, particularly a kind of Pyatyi Multilateral Wells sealing tool.
Background technology:
The Multilateral Wells technology is a novel drilling technology that grows up after directional well, sidetracked hole, horizontal well technology, and according to complexity and the functional staging hierarchy of setting up of completion, the completion mode of Multilateral Wells can be divided into 1～6S totally 7 grades.Wherein 4 grades of completions refer to main borehole and the equal setting of casing of branch well hole and cementing well.5 grades of completions are to increase and can provide pressure-tight completion system at Multilateral Wells bushing pipe and main sleeve pipe junction in 4 grade branch well connection basis.The completion technique of domestic 4 grade branch wells has been tending towards ripe at present, however 4 grade branch well completion window place's waterpower blow-by, and the completion tool of existing 5 grade branch wells also rarely has report.
Summary of the invention:
The technical problem to be solved in the present invention provides a kind of Pyatyi Multilateral Wells sealing tool, and this instrument has realized playing at the branch well window place effect of hydraulic seal, can provide mechanical connection for Multilateral Wells well tubing string.Existing 4 grade branch well instruments have been overcome in the packing less deficiency of branch well window place waterpower.
The technical solution used in the present invention is: a kind of Pyatyi Multilateral Wells sealing tool comprises main borehole pre-drilled cavity pipe; Have branched hole on the main borehole pre-drilled cavity pipe sidewall, main borehole pre-drilled cavity pipe lower end connects lower contact, main borehole pre-drilled cavity pipe inside is equipped with the hollow wedge deflection tool of circular arc type, branch well hole pre-drilled cavity insertion instrument is inserted in the main borehole pre-drilled cavity pipe, the branch well hole pre-drilled cavity inserts the instrument upper end and connects top connection, be processed with axial groove and ring-shaped groove at branch well hole pre-drilled cavity insertion instrument and the close-fitting outer wall of main borehole pre-drilled cavity inside pipe wall, sulfuration has caulking gum in axial groove and the ring-shaped groove, the hollow wedge deflection tool upper side of circular arc type tube wall is oblique to be processed with a circular arc cutaway, the circular arc tube wall face of this indentation, there and branch well hole pre-drilled cavity insert instrument tube wall inclined-plane and closely cooperate, the branch well hole pre-drilled cavity inserts on instrument and the contacted tube wall of the hollow wedge deflection tool of circular arc type and has groove, sulfuration has caulking gum in the groove, on the outer wall of the hollow wedge deflection tool of circular arc type lower end the O RunddichtringO is installed.
Be processed with groove on the inwall of main borehole pre-drilled cavity pipe lower end and match with boss on the hollow wedge deflection tool outer wall of circular arc type.
The branch well hole pre-drilled cavity inserts instrument and positions by inner spiral positioning key and the main borehole pre-drilled cavity pipe of processing of main borehole pre-drilled cavity pipe.
Axial groove and groove shape are wide at the top and narrow at the bottom.
The invention has the beneficial effects as follows: the present invention has been owing to adopted two group window seal combination, thereby can play the effect of hydraulic seal at the branch well window place, can provide mechanical connection for Multilateral Wells well tubing string.
Description of drawings:
The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the present invention middle part schematic cross-section.
Fig. 3 is the anti-rotation structure schematic diagram of main borehole pre-drilled cavity pipe and the hollow wedge deflection tool of circular arc type.
Fig. 4 is the structural representation of axial groove.
The specific embodiment:
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, a kind of Pyatyi Multilateral Wells sealing tool comprises main borehole pre-drilled cavity pipe 2; Have branched hole on main borehole pre-drilled cavity pipe 2 sidewalls, the diameter of this branched hole is less than the internal diameter of main borehole pre-drilled cavity pipe 2, and Multilateral Wells interpolation tubing string can enter branch well hole by this hole, and the branch well hole pre-drilled cavity inserts instrument 3 and is suspended near this hole.Main borehole pre-drilled cavity pipe 2 lower ends connect lower contact 5, main borehole pre-drilled cavity pipe 2 inside are equipped with the hollow wedge deflection tool 4 of circular arc type, the branch well hole pre-drilled cavity inserts instrument 3 and is inserted in the main borehole pre-drilled cavity pipe 2, the branch well hole pre-drilled cavity inserts instrument 3 upper ends and connects top connection 1, insert instrument 3 at the branch well hole pre-drilled cavity and be processed with axial groove 7 and ring-shaped groove 6 with the close-fitting outer wall of main borehole pre-drilled cavity pipe 2 inwalls, sulfuration has caulking gum in axial groove 7 and the ring-shaped groove 6, the hollow wedge deflection tool 4 upper side tube walls of circular arc type are oblique to be processed with a circular arc cutaway, the circular arc tube wall face of this indentation, there and branch well hole pre-drilled cavity insert instrument 3 tube wall inclined-planes and closely cooperate, the branch well hole pre-drilled cavity inserts on instrument 3 and the hollow wedge deflection tool 4 contacted tube walls of circular arc type and has groove 8, sulfuration has caulking gum in the groove 8, on the hollow wedge deflection tool 4 lower end outer walls of circular arc type the O RunddichtringO is installed.Be processed with groove on the main borehole pre-drilled cavity pipe 2 lower end inwalls and match with boss on hollow wedge deflection tool 4 outer walls of circular arc type.The branch well hole pre-drilled cavity inserts instrument 3 and positions by main borehole pre-drilled cavity pipe 2 inner spiral positioning key and the main borehole pre-drilled cavity pipes of processing 2.Axial groove 7 and groove 8 are shaped as wide at the top and narrow at the bottom, and rubber is fixed in axial groove 7 and the groove 8 by sulfuration, and certain magnitude of interference is arranged.
When branch well hole pre-drilled cavity insertion instrument 3 was inserted into the window place, the caulking gum in extruding axial groove 7 and the groove 8 had been realized the sealing at this two place.Caulking gum in the ring-shaped groove 6 and the caulking gum in the axial groove 7 have formed one group of complete window seal combination like this, and the caulking gum in the groove 8 and the O RunddichtringO of the hollow wedge deflection tool 4 of circular arc type have formed the complete window seal combination of another group.These two groups of seal combination are separate, as long as one group of sealing is arranged effectively, window just can be finished hydraulic seal.
During construction, first inferior division well bottom completion tubular column, and lose in branch well hole.Following main borehole pre-drilled cavity pipe 2, and be sitting on the main borehole subsurface benchmark platform.At this moment pre-drilled cavity direction and the branch well hole of main borehole just in time align, and its degree of depth is also coincide.Be lowered to the branch well hole pre-drilled cavity and insert instrument 3, the branch well hole pre-drilled cavity insert instrument 3 have tieback assembly can with branch well hole bottom completion tubular column tieback, the branch well hole pre-drilled cavity inserts instrument 3 and is inserted into the down-hole assembling of having finished Pyatyi Multilateral Wells sealing tool behind the position.Be lowered to the top completion tubular column at last, insert and tieback branch well hole pre-drilled cavity insertion instrument 3.
Be understandable that, more than about specific descriptions of the present invention, only for the present invention being described and being not to be subject to the described technical scheme of the embodiment of the invention, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the present invention, to reach identical technique effect; Use needs as long as satisfy, all within protection scope of the present invention.
Claims (4)
1. a Pyatyi Multilateral Wells sealing tool comprises main borehole pre-drilled cavity pipe (2); It is characterized in that: have branched hole on main borehole pre-drilled cavity pipe (2) sidewall, main borehole pre-drilled cavity pipe (2) lower end connects lower contact (5), main borehole pre-drilled cavity pipe (2) inside is equipped with the hollow wedge deflection tool of circular arc type (4), the branch well hole pre-drilled cavity inserts instrument (3) and is inserted in the main borehole pre-drilled cavity pipe (2), the branch well hole pre-drilled cavity inserts instrument (3) upper end and connects top connection (1), insert instrument (3) at the branch well hole pre-drilled cavity and be processed with axial groove (7) and ring-shaped groove (6) with the close-fitting outer wall of main borehole pre-drilled cavity pipe (2) inwall, sulfuration has caulking gum in axial groove (7) and the ring-shaped groove (6), the hollow wedge deflection tool of circular arc type (4) upper side tube wall is oblique to be processed with a circular arc cutaway, the circular arc tube wall face of this indentation, there and branch well hole pre-drilled cavity insert instrument (3) tube wall inclined-plane and closely cooperate, the branch well hole pre-drilled cavity inserts on instrument (3) and the contacted tube wall of the hollow wedge deflection tool of circular arc type (4) and has groove (8), sulfuration has caulking gum in the groove (8), on the outer wall of the hollow wedge deflection tool of circular arc type (4) lower end the O RunddichtringO is installed.
2. according to the described Pyatyi Multilateral Wells of claim 1 sealing tool, it is characterized in that: be processed with groove on the inwall of described main borehole pre-drilled cavity pipe (2) lower end and match with boss on the hollow wedge deflection tool of circular arc type (4) outer wall.
3. according to the described Pyatyi Multilateral Wells of claim 1 sealing tool, it is characterized in that: described branch well hole pre-drilled cavity inserts instrument (3) and positions by inner spiral positioning key and the main borehole pre-drilled cavity pipe of processing (2) of main borehole pre-drilled cavity pipe (2).
4. according to the described Pyatyi Multilateral Wells of claim 1 sealing tool, it is characterized in that: described axial groove (7) and groove (8) are shaped as wide at the top and narrow at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310162955.2A CN103244070B (en) | 2013-05-07 | 2013-05-07 | A kind of five-level multilateral well seal tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310162955.2A CN103244070B (en) | 2013-05-07 | 2013-05-07 | A kind of five-level multilateral well seal tool |
Publications (2)
| Publication Number | Publication Date |
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| CN103244070A true CN103244070A (en) | 2013-08-14 |
| CN103244070B CN103244070B (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310162955.2A Active CN103244070B (en) | 2013-05-07 | 2013-05-07 | A kind of five-level multilateral well seal tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453776B (en) * | 2014-11-14 | 2017-01-18 | 中国石油集团长城钻探工程有限公司 | Six-level branching well built-in window sealing well completion method |
| CN113279713A (en) * | 2020-02-19 | 2021-08-20 | 中国石油化工股份有限公司 | Branch window supporting device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209644B1 (en) * | 1999-03-29 | 2001-04-03 | Weatherford Lamb, Inc. | Assembly and method for forming a seal in a junction of a multilateral well bore |
| CN101413384A (en) * | 2008-11-24 | 2009-04-22 | 中国石油集团长城钻探工程有限公司 | Method for sealing branch well window by using metal expansion pipe |
| US20090188671A1 (en) * | 2008-01-25 | 2009-07-30 | Baker Hughes Incorporated | Junction having improved formation collapse resistance and method |
| CN201292800Y (en) * | 2008-11-03 | 2009-08-19 | 中国石油集团长城钻探工程有限公司 | Six-grade branch well window sealing mechanism |
| CN101748989A (en) * | 2009-12-15 | 2010-06-23 | 中国石油集团长城钻探工程有限公司 | Branch well window sealing method |
| CN201972644U (en) * | 2010-12-17 | 2011-09-14 | 中国石油集团长城钻探工程有限公司 | Six-stage branch well window connecting device |
| CN202338216U (en) * | 2011-11-21 | 2012-07-18 | 中国石油集团长城钻探工程有限公司 | High pressure resistant tapping sleeve |
-
2013
- 2013-05-07 CN CN201310162955.2A patent/CN103244070B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209644B1 (en) * | 1999-03-29 | 2001-04-03 | Weatherford Lamb, Inc. | Assembly and method for forming a seal in a junction of a multilateral well bore |
| US20090188671A1 (en) * | 2008-01-25 | 2009-07-30 | Baker Hughes Incorporated | Junction having improved formation collapse resistance and method |
| CN201292800Y (en) * | 2008-11-03 | 2009-08-19 | 中国石油集团长城钻探工程有限公司 | Six-grade branch well window sealing mechanism |
| CN101413384A (en) * | 2008-11-24 | 2009-04-22 | 中国石油集团长城钻探工程有限公司 | Method for sealing branch well window by using metal expansion pipe |
| CN101748989A (en) * | 2009-12-15 | 2010-06-23 | 中国石油集团长城钻探工程有限公司 | Branch well window sealing method |
| CN201972644U (en) * | 2010-12-17 | 2011-09-14 | 中国石油集团长城钻探工程有限公司 | Six-stage branch well window connecting device |
| CN202338216U (en) * | 2011-11-21 | 2012-07-18 | 中国石油集团长城钻探工程有限公司 | High pressure resistant tapping sleeve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453776B (en) * | 2014-11-14 | 2017-01-18 | 中国石油集团长城钻探工程有限公司 | Six-level branching well built-in window sealing well completion method |
| CN113279713A (en) * | 2020-02-19 | 2021-08-20 | 中国石油化工股份有限公司 | Branch window supporting device |
| CN113279713B (en) * | 2020-02-19 | 2022-11-25 | 中国石油化工股份有限公司 | Branch window strutting arrangement |
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| Publication number | Publication date |
|---|---|
| CN103244070B (en) | 2015-09-23 |
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Effective date of registration: 20201124 Address after: No. 6, liupukang, Xicheng District, Beijing 100120 Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |
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