CN1285826C - Branch well reentering tool - Google Patents
Branch well reentering tool Download PDFInfo
- Publication number
- CN1285826C CN1285826C CN 200410035795 CN200410035795A CN1285826C CN 1285826 C CN1285826 C CN 1285826C CN 200410035795 CN200410035795 CN 200410035795 CN 200410035795 A CN200410035795 A CN 200410035795A CN 1285826 C CN1285826 C CN 1285826C
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- piston
- branch well
- guide head
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Abstract
The present invention discloses branch well reentering tool used for the completion operation of branch wells of oil and gas wells in the well drilling of petroleum industry. The present invention is composed of a main body, a flow distribution plate, a flow rod, a piston, an ejector block, a pressing plate, a push rod and a guide head. When used, the present invention is connected with the lower end of a completion pipe column or an oil pipe column and is lowered in a well; when the present invention approaches a window of a predetermined branch well bore, a drilling pump is started, pressure drop which is exerted on a piston drives a push rod to make the guide head deflect at a certain angle, the pipe column is slowly lowered and rotated, the guide head guides the pipe column enter the branch well bore, and thereby, one-step construction of the branch well bore is realized. The present invention overcomes the defects of the existing preset guide device of the branch well, enlarges the diameter of a main well bore, and solves of problems of test, sand washing and flushing operation of the branch well bore. When the present invention is used, branch well bores are selectively entered under the condition of multi branches, and the purpose of reentering of branch well bores is realized. The time can be saved, the construction operation program can be simplified, the problem of recycling well completion whipstocks does not exist, and the risk of the operation is reduced.
Description
Technical field
The present invention relates to a kind of Multilateral Wells and enter instrument again, belong to the down-hole completion tool in the Multilateral Wells completion practice in the petroleum geology well drilling industry.
Technical background
So-called Multilateral Wells gets out plural well exactly in a main borehole, compare with horizontal well, the sidetrack horizontal well technology of present comparative maturity and to have bigger superiority, can bring into play on the one hand that horizontal well is efficient, the advantage of high yield, increase drainage area, excavate the remaining oil potentiality, improve recovery ratio, improve the oil field development effect.On the other hand can a shared main borehole exploit the same oil reservoir of two or more oil reservoirs or different directions simultaneously, more reducing investment outlay than horizontal well in the mining-employed reserves better.The Multilateral Wells technology has become the frontier technology of a crude oil extraction.
Yet current in vast oil drilling work, the problem that enters again of branch well hole in the Multilateral Wells is being perplexed people always, especially branch well hole more than two situation under, the reentrant difficulty of selectivity is bigger.Mainly utilize whipstock to import or set in advance the method for guiding device at present both at home and abroad, reenter each branch well hole, but, if use whipstock to import, then must be before completion tubular column be lowered to, be lowered to special whipstock earlier, and it is consistent with the well orientation to guarantee the whipstock inclined-plane at first will to carry out orientation, and finish enter operation again after, must reclaim whipstock, so not only time-consuming, and can cause damage to the main borehole sleeve pipe, reduce the oil well life-span, increased the risk of operation; And if set in advance guiding device, then can reduce the latus rectum of main borehole, carry out completion and workover treatment brings difficulty to branch well hole.
Summary of the invention
At the problem in the existing branch hole drilling technology, the invention solves when existing Multilateral Wells enters again and must reserve guiding device or be lowered to the problem that whipstock leads, and can be under the situation of lift pipe string not, selectivity enters each branch well hole, has thoroughly solved the reentrant difficult problem of Multilateral Wells completion selectivity.The object of the invention is to enter instrument again for situ of drilling well provides a kind of Multilateral Wells.
The present invention mainly is made up of body, flow distribution plate, flow bar, piston, pushing block, pressing plate, push rod, guide head, wherein in the piston cavity carboloy nozzle is housed, pushing block is connected by dowel fixes with push rod, pushing block is connected by draw-in groove with piston, the lower end of body flexibly connects by pivot pin and guide head axle, the lower end of push rod withstands on the upper end step of guide head axle, and the body lower end side is to having discharge orifice.
The present invention realizes like this, body is a hollow tubular body, the upper end is a screw thread, and the screw thread lower end is processed with interior step, is located flow distribution plate on it, the flow bar is by the flow distribution plate centre bore, be suspended on the flow distribution plate, in the inner chamber, push rod is connected by dowel fixes with pushing block on its lower end insertion piston, pressing plate is connected by screw with body, and body is connected with guide head by pivot pin bottom.The body lower side is to having discharge orifice, bottom lock.Flow distribution plate circumferentially has 2-6 runner hole, and the center has a hole to hang the flow bar.Piston is contained in the chamber body, and piston cavity is equipped with carboloy nozzle.The piston middle part is outer circumferentially to have draw-in groove, and pushing block is connected with piston by draw-in groove.Body exterior has keyway, is embedded with push rod.The lower end of push rod withstands on the upper end step of guide head, and the guide head lower end is coniform.
Multilateral Wells enters instrument again and is connected on completion tubular column or tubing string bottom, be lowered to completion tubular column or oil pipe notes, when near predetermined branch well window place, the turn on pump pressurization, the pressure drop that acts on the piston forces piston to move down, make the certain angle of guide head deflection main borehole by push rod, slowly transferring and rotating tubing string enters in the branch well hole guide head guiding tubing string, after tubing string enters branch well hole, termination of pumping, guide head restores to the original state because of deadweight, put more than the institute and put tubing string and can not be hindered, thereby realize that branch well hole once constructs, overcome the drawback that existing Multilateral Wells presets guiding device, increase the main borehole latus rectum, solved the branch well hole test, sand washing, the difficult problem of clean-out service; And utilize this invention, can be under the situation of multiple-limb, selectivity enters branch well hole, realizes the purpose that each branch well hole reenters; In addition owing to do not have bent sub, the resistance when having reduced lower tubular column has reduced the wearing and tearing to sleeve pipe; There is not the recovery problem of completion whipstock, can saves time, simplify the construction operation program, reduce operating risk.
Description of drawings
Fig. 1: Multilateral Wells enters the tool construction schematic diagram again
Fig. 2: A-A sectional view;
Among the figure: 1 body, 2 flow distribution plates, 3 flow bars, 4 carboloy nozzles, 5 pistons, 6 pushing blocks, 7 pins, 8 pressing plates, 9 screws, 10 push rods, 11 pivot pins, 12 guide heads, 13 runner holes, 14 piston draw-in grooves, 15 sealing rings, 16 discharge orifices, 17 keyways
The specific embodiment
Now the present invention is further described in conjunction with Figure of description.
Multilateral Wells enters instrument mainly by body 1, flow distribution plate 2, flow bar 3, piston 5, pushing block 6, pressing plate 8, push rod 10, guide head 12 is formed, as shown in Figure 1, body 1 wherein one be box, the box bottom is processed with a step, be located flow distribution plate 2 on the step, flow distribution plate 2 circumferentially has 2-6 runner hole 13, flow bar 3 is suspended on the flow distribution plate 2 by centre bore, insert on the piston 5 in the inner chamber lower end, the guiding fluid enters piston cavity smoothly, inner chamber is equipped with carboloy nozzle 4 on the piston 5, piston 5 seals by sealing ring 15 with body 1, they are contained in the chamber body, body 1 one sides have keyway 17, in push rod 10 (as Fig. 2) is housed, the keyway upper end has square hole, pushing block 6 inserts piston draw-in groove 14 by this square hole, be connected by dowel fixes with push rod 10, square hole seals with pressing plate, and is screwed, body 1 lower side is to having discharge orifice 16 as slurry channel, flexibly connect by pivot pin 11 and guide head 12 bottom, the lower end of push rod 10 withstands on the upper end step of guide head 12, and guide head 12 lower ends are coniform, can upwards turn up around pivot pin, at 45 with body.
During use, Multilateral Wells enters instrument again and is connected on completion tubular column or tubing string bottom, be lowered to tubing string, when tubing string during down to branch well hole the window's position, the turn on pump pressurization, completion fluid enters piston cavity by flow distribution plate through the guiding of flow bar, discharge from discharge orifice at last, internal diameter is less behind the carboloy nozzle because piston cavity is packed into, piston is moved down by the pressure drop effect, force pushing block to move down thereupon, and then promote push rod and make 0-45 ° of guide head deflection, force tubing string to produce lateral force, this is slowly to transfer and rotate tubing string, in case guide head align fingers well window will enter branch well hole under lateral forces, thereby guiding oil pipe or completion tubular column enter branch well hole.
As another kind of form of the present invention, can act directly on generation pressure drop promotion piston 5 work on the piston 5 by completion fluid without flow distribution plate, flow bar and carboloy nozzle.
The present invention is not limited to above-mentioned embodiment; no matter on its shape or structure, do any variation; everyly utilize body, piston, pushing block, push rod, guide head in this device to realize that to the Multilateral Wells automatic guide, alternative enters all dropping within protection scope of the present invention of each branch well hole.
Claims (6)
1. a Multilateral Wells enters instrument again, comprise body (1), flow distribution plate (2), flow bar (3), piston (5), pushing block (6), pressing plate (8), push rod (10), guide head (12), it is characterized in that: body (1) is a hollow tubular body, the upper end is a screw thread, the screw thread lower end is processed with interior step, body (1) lower side is to having discharge orifice (16), the sealing of body (1) intracavity bottom, be located flow distribution plate (2) on it, flow bar (3) is by flow distribution plate (2) centre bore, be suspended on the flow distribution plate (2), its lower end is inserted piston (5) and is gone up in the inner chamber, push rod (10) is fixedlyed connected by pin (7) with pushing block (6), and pressing plate (8) is connected by screw with body (1), and body (1) is connected with guide head (12) by pivot pin (11) bottom.
2. Multilateral Wells according to claim 1 enters instrument again, it is characterized in that: flow distribution plate (2) circumferentially has 2-6 runner hole, and the center has a hole to hang flow bar (3).
3. Multilateral Wells according to claim 1 enters instrument again, it is characterized in that: piston (5) is contained in body (1) inner chamber, and piston (5) inner chamber is equipped with carboloy nozzle (4).
4. Multilateral Wells according to claim 1 enters instrument again, it is characterized in that: piston (5) middle part is outer circumferentially to have draw-in groove (14), and pushing block (6) is connected with piston (5) by draw-in groove.
5. Multilateral Wells according to claim 1 enters instrument again, it is characterized in that: body (1) outside has keyway (17), is embedded with push rod (10).
6. Multilateral Wells according to claim 1 enters instrument again, it is characterized in that: the lower end of push rod (10) withstands on the upper end step of guide head (12), and guide head (12) lower end is coniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410035795 CN1285826C (en) | 2004-10-10 | 2004-10-10 | Branch well reentering tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410035795 CN1285826C (en) | 2004-10-10 | 2004-10-10 | Branch well reentering tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1624292A CN1624292A (en) | 2005-06-08 |
| CN1285826C true CN1285826C (en) | 2006-11-22 |
Family
ID=34763475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410035795 Expired - Fee Related CN1285826C (en) | 2004-10-10 | 2004-10-10 | Branch well reentering tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1285826C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX367299B (en) * | 2013-07-25 | 2019-08-14 | Halliburton Energy Services Inc | Deflector assembly for a lateral wellbore. |
| CN103670312B (en) * | 2013-11-27 | 2016-09-07 | 江汉石油钻头股份有限公司 | Have the underwater steel wire rope work tool transferring and reclaiming function concurrently |
| CN111997544B (en) * | 2020-10-22 | 2022-08-02 | 中国电建集团河南工程有限公司 | Sedimentary potted landscape ultra-deep layer heat storage geothermal well drilling construction method |
| CN112627730B (en) * | 2020-12-18 | 2022-10-28 | 成都理工大学 | Method and device for reentry into radial branch well |
-
2004
- 2004-10-10 CN CN 200410035795 patent/CN1285826C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1624292A (en) | 2005-06-08 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061122 Termination date: 20201010 |
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| CF01 | Termination of patent right due to non-payment of annual fee |