CN1932231A - Branched selective reentry method and apparatus - Google Patents
Branched selective reentry method and apparatus Download PDFInfo
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- CN1932231A CN1932231A CN 200610047915 CN200610047915A CN1932231A CN 1932231 A CN1932231 A CN 1932231A CN 200610047915 CN200610047915 CN 200610047915 CN 200610047915 A CN200610047915 A CN 200610047915A CN 1932231 A CN1932231 A CN 1932231A
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- reentry
- piston
- push rod
- connecting rod
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Abstract
The present invention relates to a branch hole selective reentry method for making downhole remedial operation of complex gas-oil well and its equipment. Said equipment is formed from self-body, piston, push rod, gland, hollow fixed pin, guide head, connecting rod, guide shoe and sealing plug. Said invention also provides the concrete working principle of said equipment, and the utilization of said method and equipment can smoothly make the work string be fed into branch well and implement following construction operations.
Description
Technical field:
The present invention relates to a kind of method and device that is used for casing programme complex hydrocarbon well workover treatment process workover tool reentry wells such as oil field Multilateral Wells, shark's fin well, horizontal well, belong to oil-gas mining underground work technical tool class.
Background technology:
Along with oil field development enters the middle and later periods, in order to improve oil recovery factor, exceptional well body structure technical oil gas wells such as Multilateral Wells, horizontal well increase day by day.The characteristics of special well are the casing programme complexity, and well mostly is level or big gradient greatly.The greatest problem that runs into during the workover treatment of this kind oil gas well is that how selectivity enters branch well hole to workover tool, carry out workover treatment, if use common process can't enter branch well hole, but also may cause complicated down-hole accident, cause this oil gas well to be scrapped at last.At present, both at home and abroad Multilateral Wells selectivity reentry technology is mainly utilized the guiding device that sets in advance at main borehole or branch well hole, mainly by presetting guiding device and the well workover orienting cover combines.This method is that Multilateral Wells reentry tubing string is connected guiding device top, the well workover orienting cover is preset at the top of whipstock base, preset guiding device length (adjusting) and orientation by adjusting during construction by well workover orienting cover and Multilateral Wells interocular distance, it is consistent with the well orientation to keep presetting guiding device, be pushed down into well selectivity reentry tubing string then, preset the guiding device seat on the well workover orienting cover, cut off shear pin, the reentry tubing string then enters branch well hole along presetting guiding device, realizes the branch well hole subsequent job.This kind method imports accurately and reliably, but shortcoming is after finishing the reentry operation, needs to reclaim presetting guiding device, the working procedure complexity, the risk height can reduce owing to presetting guiding device main borehole diameter simultaneously, brings difficulty for subsequent branches well completion and workover treatment.
Summary of the invention:
Thereby it is a kind of easy to implement and needn't preset the Multilateral Wells selectivity deflector equipment that guiding device can be simplified working procedure, reduce construction risk that the object of the invention is to provide.
The technical solution adopted for the present invention to solve the technical problems is: branched selective reentry method provided by the invention is the bending that utilizes the mode of pressure drop to make the selectivity deflector equipment produce certain angle in a certain direction, slowly transfers and rotates the reentry tubing string; When crooked lateral force made the crooked orientation of reentry instrument consistent with branch well hole, reentry tool guides working string entered branch well hole, finishes operations such as follow-up test, sand washing, well-flushing.The device that this method adopts is made up of body, piston, push rod, gland, hollow steady pin, guide head, connecting rod, guide shoe and sealing plug.Piston is housed in the body cavity, and the piston outside is provided with push rod, is inserted in by square hole in the keyway of body middle part one side, and the push rod and the keyway outside are screwed all around with the gland sealing; The a pair of symmetrical ear in body bottom is connected to a fixed by hollow steady pin and guide head, and the current by pass two ends on the ear seal with plug; The guide head lower end is connected with connecting rod with screw thread, and the connecting rod lower end is connected with guide shoe with screw thread.During construction, with the bottom G.I.H of this device tipping at completion tubular column or oil pipe working string.When tubing string during down to the branch well hole bifurcation, the turn on pump pressurization, pressure drop promotes descent of piston, and the drive push rod forces guide head to produce 0-90 ° bending, make the bottom tubing string produce lateral force, at this moment slowly transfer again and rotate tubing string, in case guide shoe align fingers well, will enter branch well hole under the effect of the lateral force that pressure drop produces, the guiding tubing string enters and finishes follow-up construction operation.Under the situation of multiple-limb, one time alternative enters a plurality of branch well holes or main borehole, realizes the purpose that each branch well hole is reentried, not only save the activity duration, simplify working procedure, especially do not have the recovery problem that presets guiding device, reduced construction risk.Because this device has structurally adopted the hollow steady pin, and medial side is to having discharge orifice in it, the sealing of pin hole fluid course, can keep the unimpeded of flushing fluid or flushing liquor inner flow passage, the short circuit that do not circulate of whole tubing string, thereby flushing fluid can keep recurrent state always, is convenient to the processing of down-hole burst complex situations.
Multilateral Wells reentry method provided by the invention is easy to implement, the reentry tool construction that is adopted is reasonable, sealing is reliable, and short circuit does not circulate, utilize this method and apparatus to guide working string to enter branch well hole smoothly, finish follow-up construction operation, bore alternative in next time of multiple-limb situation and enter a plurality of branch well holes or main borehole, realize each branch well hole reentry, not only save the activity duration, simplify working procedure, especially do not have the recovery problem that presets guiding device, can reduce construction risk.
The Multilateral Wells selectivity deflector equipment structural representation that description of drawings: Fig. 1 adopts for the present invention, Fig. 2 are body 1 among Fig. 1, guide head 6, hollow steady pin 5, sealing plug 9 annexation schematic diagrames.Fig. 3 is this device production orientation figure.
The specific embodiment: be illustrated below in conjunction with accompanying drawing.
As shown in the figure: the Multilateral Wells selectivity deflector equipment that the present invention adopts is made up of body 1, piston 2, push rod 3, gland 4, hollow steady pin 5, guide head 6, connecting rod 7, guide shoe 8 and sealing plug 9.Its connection, assembled relation are as follows: body is equipped with piston 2 in 1 chamber, and piston 2 outsides are provided with push rod 3, is inserted in by square hole in the keyway of body 1 middle part one side, and the push rod 3 and the keyway outside are screwed all around with gland 4 sealings; The a pair of symmetrical ear in body 1 bottom is connected to a fixed by hollow steady pin 5 and guide head 6; Current by pass two ends on the ear seal with plug 9; Guide head 6 lower ends are connected with connecting rod 7 with screw thread, and connecting rod 7 lower ends are connected 8 with screw thread with guide shoe.Wherein, body 1 is the pipe body, upper end band internal thread is in order to be connected with oil pipe or completion practice tubing string, one side has keyway, the keyway upper end has the square tube hole in order to insert push rod 3, the lower end is a pair of symmetrical ear, which is provided with the pin hole and the groove of symmetry, is drilled with current by pass 11 in the ear and communicates with body 1 inner chamber.Piston 2 is a hollow circular cylinder, and its periphery middle part is provided with in order to clamp the groove of push rod 3, and the upper and lower part is provided with the seal groove that sealing ring is set.Push rod 3 is the pick shape.Hollow steady pin 5 is cylindrical, and medial side is to having discharge orifice 10, and the pin hole fluid course is with 9 sealings of sealing plug, makes the short circuit that do not circulate of whole tubing string, and liquid stream can directly flow to the shaft bottom by guide shoe 8.Guide head 6 is a tubular body, and the ear groove of its upper end bossy body and body 1 lower end matches, and is provided with the pin hole that is complementary with body 1, and pin hole below inner headed face is provided with a shoulder, and the lower end is provided with the internal thread that is connected usefulness with connecting rod 7.
Claims (3)
1, a kind of branched selective reentry method is characterized in that: this method is the bending that utilizes the mode of pressure drop to make the selectivity deflector equipment produce certain angle in a certain direction, slowly transfers and rotates the reentry tubing string; When crooked lateral force made the crooked orientation of reentry instrument consistent with branch well hole, reentry tool guides working string entered branch well hole, finishes follow-up test, sand washing, clean-out service.
2, a kind of Multilateral Wells selectivity deflector equipment is made up of body (1), piston (2), push rod (3), gland (4), hollow steady pin (5), guide head (6), connecting rod (7), guide shoe (8) and sealing plug (9); It is characterized in that: body (1) is equipped with piston (2) in the chamber, and piston (2) outside is provided with push rod (3), is inserted in by square hole in the keyway of body (1) middle part one side, and the push rod (3) and the keyway outside are screwed all around with gland (4) sealing; This a pair of symmetrical ear in (1) body bottom is connected to a fixed by hollow steady pin (5) and guide head (6); Current by pass two ends on the ear seal with plug (9); Guide head (6) lower end is connected with connecting rod (7) with screw thread, and connecting rod (7) lower end is connected with guide shoe (8) with screw thread.
3, a kind of Multilateral Wells selectivity deflector equipment, it is characterized in that: the hollow steady pin (5) that this device adopts is cylindrical, medial side is to having discharge orifice (10), the pin hole fluid course seals with sealing plug (9), the short circuit that do not circulate of whole tubing string, liquid stream can directly flow to the shaft bottom by guide shoe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100479153A CN100472027C (en) | 2006-09-24 | 2006-09-24 | Branched selective reentry method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100479153A CN100472027C (en) | 2006-09-24 | 2006-09-24 | Branched selective reentry method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1932231A true CN1932231A (en) | 2007-03-21 |
| CN100472027C CN100472027C (en) | 2009-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100479153A Expired - Fee Related CN100472027C (en) | 2006-09-24 | 2006-09-24 | Branched selective reentry method and apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN100472027C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014351A (en) * | 2016-02-17 | 2016-10-12 | 中国石油集团渤海钻探工程有限公司 | Method for accurately and rapidly lowering screen pipe in horizontal multilateral borehole |
| CN113338830A (en) * | 2021-06-10 | 2021-09-03 | 中海油田服务股份有限公司 | Releasing tool and separate production well completion method for horizontal well multi-branch well bore |
-
2006
- 2006-09-24 CN CNB2006100479153A patent/CN100472027C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014351A (en) * | 2016-02-17 | 2016-10-12 | 中国石油集团渤海钻探工程有限公司 | Method for accurately and rapidly lowering screen pipe in horizontal multilateral borehole |
| CN106014351B (en) * | 2016-02-17 | 2018-12-25 | 中国石油集团渤海钻探工程有限公司 | A method of the accurate quickly decentralization screen casing in horizontal multiple-limb wellbore |
| CN113338830A (en) * | 2021-06-10 | 2021-09-03 | 中海油田服务股份有限公司 | Releasing tool and separate production well completion method for horizontal well multi-branch well bore |
| CN113338830B (en) * | 2021-06-10 | 2023-02-24 | 中海油田服务股份有限公司 | Releasing tool and separate production well completion method for horizontal well multi-branch well bore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100472027C (en) | 2009-03-25 |
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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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chinese Petroleum Group Changcheng Drilling Engineering Co., Ltd. Assignor: Liaohe Petroleum Exploration Bureau Contract fulfillment period: 2008.10.17 to 2015.10.16 contract change Contract record no.: 2009990001234 Denomination of invention: Branched selective reentry method and apparatus Granted publication date: 20090325 License type: Exclusive license Record date: 2009.11.9 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.17 TO 2015.10.16; CHANGE OF CONTRACT Name of requester: CHINA PETROLEUM GROUP GREAT WALL DRILLING ENGINEER Effective date: 20091109 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090325 Termination date: 20100924 |