CN1414207A - Oil field branching well reentry device - Google Patents
Oil field branching well reentry device Download PDFInfo
- Publication number
- CN1414207A CN1414207A CN 02144551 CN02144551A CN1414207A CN 1414207 A CN1414207 A CN 1414207A CN 02144551 CN02144551 CN 02144551 CN 02144551 A CN02144551 A CN 02144551A CN 1414207 A CN1414207 A CN 1414207A
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- China
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- oil field
- tube connector
- positioner
- become
- multilateral wells
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Abstract
The invented oil field branch well reentry device is composed of a location device, a variable buckle joint, a wedge deflection tool, a guide head and connection pipes. During operation, the guide head is used to detect the branch well window position, then make the well drilling tubular column continuously and selectively enter each branch borehole without need to take out the well drilling tool. The present invention solves the difficult problems of branch borehole test, said flushing, well washing etc.. The invented installation can be repeatedly used.
Description
Technical field:
The present invention relates to a kind of oil field Multilateral Wells deflector equipment, belong to drilling well downhole tool class.
Background technology:
Along with science and technology development, the oil drilling technology also reaches its maturity, the multilateral well technology that wherein gets out several mouthfuls of oil wells in a bite oil well simultaneously is with its higher oil well well yield, lower oil extraction cost has become the frontier technology of world's exploitation technology, but for this branch well hole in same well when needs are constructed, the problem that reenters does not all thoroughly solve always, what adopt at present is by set in advance guiding device on the completion interval of well body structure, realize reentering of branch well hole, this can reduce the main borehole latus rectum unavoidably, test to branch well hole, the construction of operations such as sand-flushing etc. bring difficulty.
Summary of the invention
The object of the invention is a kind of oil field Multilateral Wells deflector equipment that provides in order to overcome above-mentioned shortcoming.This device has overcome existing Multilateral Wells and has reserved the problem that guiding device exists, can automatic guide, the location, can be under lift pipe string situation not, Continuous Selection enter each branch well hole, thoroughly solved the difficult problem that Multilateral Wells reenters.
The present invention realizes like this.It is to connect change snapping head in drilling well tubing string lower end by screw thread, there is an outer step described change snapping centriciput position, hanging a positioner on the step, with hanging pin, to become snapping head and positioner is fixed together, welding a wedge deflection tool bottom at positioner, described change snapping head lower end is with one and sets upright pipe, become above the snapping head by being threaded in, step in one is arranged below setting upright pipe, be located in a tube connector on the step, tube connector and set upright between the pipe and fix with singly-bound, described tube connector bottom connects together by screw thread and seeker, snubber is housed setting upright between pipe and the tube connector space, the straight center line angle of the weight of described seeker and Multilateral Wells deflector equipment main body is the 10-30 degree, and best angle is 10 degree.
The present invention compared with prior art has a significant effect.After adopting such structure, because this device is lowered in the branch well hole with the drilling well tubing string, not be used in and preset guiding device in the casing programme, increased the well latus rectum, therefore can guarantee completion tubular column be lowered to smoothly each branch well hole carry out underground work in addition this device can reuse, only need during use device is connected on tubing string bottom, when tubing string during near the branch well window position, after slowly transferring and rotating seeker above the tubing string pipe to be connected and enter branch well hole, press down tubing string again, hang pin this moment and decide to be cut off, tubing string imports the further construction that realizes in the branch well hole branch well hole.After construction is finished, when the upper lifting pipe post arrives the precalculated position, the rotation tubing string proposes tubing string from branch well hole fully, in the time will entering next branch well hole, can by on propose or transfer the operation of tubing string above repeating, in the time of in guide head is strayed into branch well hole, only need the rotation tubing string can very simply and selectively realize reentering of each branch well hole of multilateral well.
Description of drawings:
Accompanying drawing: structural representation of the present invention.
The specific embodiment:
The present invention is provided by following examples.
Below in conjunction with accompanying drawing the present invention is described further.
Shown in the figure, this device by positioner 1, become snapping head 2, hang pin 3, set upright pipe 4, snubber 5, connector 6, wedge deflection tool 7, seeker 8 form.
It is cylindrical to become snapping head 2 shapes, and two ends are screw thread, and an end is a pin thread, and the other end is a box, and box is connected with tubing string, and pin thread is managed 4 and linked to each other with setting upright.Positioner 1 is shaped as cylindrical tube, the lower end is welded with wedge deflection tool 7 and fuses with positioner, its nozzle position of the positioner of pipe shape has a step, be suspended on change snapping head 2 steps by this step positioner, and it is fixing with pin 3, instantly during the pressure pipe post, this pin is cut off, can directly running string be imported in the branch well hole, tube connector 6 is the convex shape blank pipe, the lower end seeker 8 with screwed connection, the upper end is sitting in to be set upright on pipe 4 the step, and tube connector 6 and set upright between the pipe 4 strip one feather key is housed rotates to prevent body, at tube connector 6 and set upright pipe and snubber 5 is housed between 4 annular spaces, this snubber is that a spring is nested into the tube connector outside, and this spring can play the effect of releasing the pressure, when tubing string is pressurizeed, seeker above the tube connector is slowly entered in the Multilateral Wells, in the tube connector lower end by the seeker 8 that is being threaded.
The present invention is not limited to above-mentioned embodiment; no matter on its shape or structure, do any variation; every positioner that utilizes in this device; become the snapping head; tube connector; wedge deflection tool and seeker realize Multilateral Wells automatic guide, location, do not enter all the dropping within the protection domain of the present invention of each branch well hole with not tripping out tubing string and Continuous Selection.
Claims (3)
1, a kind of oil field Multilateral Wells deflector equipment, be to connect one in drilling well tubing string lower end by screw thread to become snapping head (2), it is characterized in that there is an outer step described change snapping centriciput position, pin (3) will become the snapping head and positioner is fixed together with hanging to hang a positioner (1) on the step, welding a wedge deflection tool (7) bottom at positioner (1), become snapping head (2) lower end and be with a centralizer (4), become above the snapping head (2) by being threaded in, step in one is arranged below setting upright pipe, be located a tube connector (6) on the step, fix with singly-bound between the two, tube connector (6) bottom connects together by screw thread and seeker (8), a snubber (5) is arranged setting upright between pipe (4) and tube connector (6) cavity.
2, oil field according to claim 1 Multilateral Wells deflector equipment; It is characterized in that the seeker (8) and the vertical center line angle of Multilateral Wells deflector equipment main body are the 10-30 degree, optimum range is 10 degree.
3, oil field according to claim 1 Multilateral Wells deflector equipment is characterized in that snubber (5) is a spring, is inserted between the annular space of setting upright pipe (4) and tube connector (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144551 CN1414207A (en) | 2002-11-02 | 2002-11-02 | Oil field branching well reentry device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144551 CN1414207A (en) | 2002-11-02 | 2002-11-02 | Oil field branching well reentry device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1414207A true CN1414207A (en) | 2003-04-30 |
Family
ID=4750584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02144551 Pending CN1414207A (en) | 2002-11-02 | 2002-11-02 | Oil field branching well reentry device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1414207A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449110C (en) * | 2005-12-30 | 2009-01-07 | 中国海洋石油总公司 | Apparatus for connecting branching well window and connecting method thereof |
| CN102182409A (en) * | 2011-04-28 | 2011-09-14 | 中国石油天然气集团公司 | Continuous tube guiding device |
| CN102182403A (en) * | 2011-04-28 | 2011-09-14 | 王萍萍 | Drilling type well completion technology for fishbone branch borehole |
| CN101718173B (en) * | 2009-12-25 | 2012-07-04 | 刘文西 | Petroleum multilateral well solid expandable tubular (SET) bifurcation structure and construction method |
| CN101718169B (en) * | 2009-11-17 | 2013-11-06 | 中国石油集团长城钻探工程有限公司 | Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism |
| CN104481438A (en) * | 2014-11-13 | 2015-04-01 | 中国石油集团长城钻探工程有限公司 | Open well anchoring tie-back well completion technology of multilateral well and tail tubing feeding tool thereof |
-
2002
- 2002-11-02 CN CN 02144551 patent/CN1414207A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449110C (en) * | 2005-12-30 | 2009-01-07 | 中国海洋石油总公司 | Apparatus for connecting branching well window and connecting method thereof |
| CN101718169B (en) * | 2009-11-17 | 2013-11-06 | 中国石油集团长城钻探工程有限公司 | Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism |
| CN101718173B (en) * | 2009-12-25 | 2012-07-04 | 刘文西 | Petroleum multilateral well solid expandable tubular (SET) bifurcation structure and construction method |
| CN102182409A (en) * | 2011-04-28 | 2011-09-14 | 中国石油天然气集团公司 | Continuous tube guiding device |
| CN102182403A (en) * | 2011-04-28 | 2011-09-14 | 王萍萍 | Drilling type well completion technology for fishbone branch borehole |
| CN102182403B (en) * | 2011-04-28 | 2016-06-29 | 王萍萍 | Drilling type well completion technology for fishbone branch borehole |
| CN104481438A (en) * | 2014-11-13 | 2015-04-01 | 中国石油集团长城钻探工程有限公司 | Open well anchoring tie-back well completion technology of multilateral well and tail tubing feeding tool thereof |
| CN104481438B (en) * | 2014-11-13 | 2017-01-18 | 中国石油集团长城钻探工程有限公司 | Tail tubing feeding tool used for open well anchoring tie-back well completion technology of multilateral well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |