CN2784569Y - Window pre-killing completion device for branch well - Google Patents

Window pre-killing completion device for branch well Download PDF

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Publication number
CN2784569Y
CN2784569Y CN 200520081439 CN200520081439U CN2784569Y CN 2784569 Y CN2784569 Y CN 2784569Y CN 200520081439 CN200520081439 CN 200520081439 CN 200520081439 U CN200520081439 U CN 200520081439U CN 2784569 Y CN2784569 Y CN 2784569Y
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CN
China
Prior art keywords
whipstock
windowing
casing
compound
branch well
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.)
Expired - Fee Related
Application number
CN 200520081439
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Chinese (zh)
Inventor
王敏生
王智峰
李作会
韩来聚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Drilling Technology Research Institute of Sinopec Shengli Petroleum Administration Bureau
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Drilling Technology Research Institute of Sinopec Shengli Petroleum Administration Bureau
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Filing date
Publication date
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Priority to CN 200520081439 priority Critical patent/CN2784569Y/en
Application granted granted Critical
Publication of CN2784569Y publication Critical patent/CN2784569Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a well completion device for branch well operation of oil gas wells in oil industry, which comprises orienting cylinders, a composite whipstock and prewindowing devices, wherein the orienting cylinders are provided with orienting key grooves for positioning the composite whipstock, the composite whipstock is composed of two concentric whipstocks, the prewindowing devices are connected to the lower end of an upper casing hanger and an elliptic hole is preliminarily arranged for communicating a main well hole. The utility model can complete the drilling of one branch well hole or a plurality of branch well holes. The upper ends of casing hangers of the main well hole and the branch well holes are connected with the orienting cylinders. When the first branch well hole is drilled, the prewindowing devices are connected below the casing hangers to cause the main well hole to be communicated with the first branch well hole. The drilling of the branch well holes can be completed by repeated construction.

Description

The Multilateral Wells of windowing in advance completion system
Technical field
The utility model relates to a kind of Multilateral Wells completion system of windowing in advance, belongs to drilling equipment in the petroleum geology 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 the connectivity problem to well in the Multilateral Wells is perplexing people always, after mainly utilizing the branch well hole finishing drilling both at home and abroad at present, overlap the mode of milling recovery or casing sidetracking, connect main borehole and each branch well hole, as in 200410004401.0, just having narrated the apparatus and method that a kind of casing pipe hole opening connects main borehole and branch well hole, but these methods are not only time-consuming, and risk is very big, often cause branch well hole and main borehole sleeve pipe to damage, can't guarantee to seal and the integrality of branch well hole, hinder entering again of branch well hole, reduced the oil well life-span.
Summary of the invention
For solving an above-mentioned difficult problem, the utility model adopts in advance, and the mode of windowing is communicated with main borehole and branch well hole, avoided utilizing the mill cover to mill in the Multilateral Wells construction in the past and reclaimed the problem that operation realizes that branch well hole and main borehole are communicated with, further improve and supporting completion technique in the branch hole drilling, reduced the construction risk of Multilateral Wells, reduce the drillng operation cost, improved the oil well life-span.The purpose of this utility model is to provide a kind of Multilateral Wells completion system of windowing in advance for situ of drilling well.
The technical solution of the utility model is as follows:
A kind of Multilateral Wells completion system of windowing in advance, it mainly comprises from bottom to top: directional tube, compound whipstock and pre-windowing facility.Directional tube is connected the upper end of setting of casing hanger, is provided with directed keyway, is used to locate compound whipstock.Compound whipstock is made up of two concentric whipstocks, connects by pin in the upper end between the two.The processing of upper end, interior whipstock inclined-plane is porose, is used for reclaiming, and hollow whipstock lower end external process has key to cooperate with the directional tube keyway.Pre-windowing facility is connected the lower end of casing hanger, and the side has the unusual casing pipe nipple of slotted eye in advance, and there is a bushing pipe inside, and the bushing pipe upper end connects drill string, and the upper end of lower end and rotating short-knot is by screwed connection, and its screw thread is left-handed button.Bearing is arranged in the rotating short-knot, have spinfunction.
When the main borehole finishing drilling is lowered to sleeve pipe, connect directional tube in setting of casing hanger upper end, after the well cementation, being lowered to compound whipstock windows for branch well hole the location is provided, window finish after, whipstock in taking out, be lowered to the branch well hole casing string, the upper end of casing string connect successively from lower to upper pre-windowing facility, on casing hanger and directional tube, spinfunction by accurate degree of depth control of setting of casing and rotating short-knot, the pre-windowing of pre-windowing facility is cooperated with the hollow whipstock, realize the perforation of main borehole and branch well hole.So repeat construction, can finish a plurality of branch well holes.
Superiority of the present utility model is:
1, opens the window of branch well hole sleeve pipe in advance, guarantee the quality of completion casing, avoid after completion perforate to cause damage main borehole sleeve pipe and branch well hole sleeve pipe.
2, improved the sealing at Multilateral Wells prong position.
3, reduced the risk of Multilateral Wells.
Description of drawings
Fig. 1: the Multilateral Wells of windowing in advance completion system schematic diagram
Fig. 2: compound whipstock schematic diagram
The compound whipstock 9-of the pre-windowing casing nipple of 1-bushing pipe 2-seal cartridge 3-4-rotating short-knot 5-reducing pipe nipple 6-directional tube 7-setting of casing hanger 8-salvages the interior pre-windowing 16-of whipstock 11-directional bond 12-hollow whipstock 13-position-limitting pin 14-baffle plate 15-of hole 10-and goes up casing hanger
The specific embodiment
Now the utility model is further described in conjunction with Figure of description.
The utility model is achieved in that
The Multilateral Wells of windowing in advance completion system is made up of directional tube 6, compound whipstock 8, pre-windowing facility from bottom to top, directional tube 6 upper ends have directed keyway, match with the directional bond 11 of compound whipstock 8, carrying out the orientation determines, pre-windowing facility is seated on the compound whipstock 8, and the pre-windowing 15 of pre-windowing facility is communicated with hollow whipstock 12 inner chambers of compound whipstock 8.
Described compound whipstock 8 is made up of interior whipstock 10, directional bond 11, baffle plate 14, position-limitting pin 13, hollow whipstock 12, interior whipstock 10 is identical with hollow whipstock 12 inclined-planes, interior whipstock 10 upper ends have salvages hole 9, have position-limitting pin 13 to prevent interior whipstock 10 plaies between hollow whipstock 12 and the interior whipstock 10, hollow whipstock 12 lower ends are the baffle plate 14 of drillability material.
Described pre-windowing facility is made up of pre-windowing casing nipple 3, bushing pipe 1, seal cartridge 2, rotating short-knot 4, reducing pipe nipple 5.Pre-windowing casing nipple 3 is the tubular bodies that have the slotted eye that matches with hollow whipstock 12 inclined-planes in sleeve pipe one side, and this hole is pre-windowing 15.Pre-windowing casing nipple 3 upper ends connect goes up casing hanger 16, and lower end and rotating short-knot 4 link to each other by screw thread.Bushing pipe 1 upper end connects drill string, the lower end links to each other with rotating short-knot 4, the main effect of bushing pipe 1 is the suspension sleeve post and stops up the sleeve pipe window, in the upper end seal cartridge is arranged between bushing pipe 1 and the pre-windowing casing nipple 3, the main sealing cementing slurry that plays a part, there is interior step screw thread below, rotating short-knot 4 upper end, being processed with left-handed box under the step is connected with bushing pipe 1, bearing is equipped with in the lower end, has spinfunction, rotating short-knot 4 links to each other with reducing pipe nipple 5 bottom, and reducing pipe nipple 5 connects the branch well hole casing string.
In the oil gas operation, when first well is after the main borehole drillng operation is finished, be lowered to the casing string that setting of casing hanger 7 upper ends are connected with directional tube 6, well cementation, after the completion, be lowered to compound whipstock 8, rotate compound whipstock 8 directional bond 11 of compound whipstock 8 is matched with the directed keyway of directional tube 6, thereby the direction on control whipstock inclined-plane, the i.e. direction of branch well hole.
After the branch well hole finishing drilling, utilize and salvage whipstock 10 in 9 withdrawals of hole, be lowered to the branch well hole casing string, end connects pre-windowing facility, when casing string down to calculating accurate well depth, pre-windowing 15 is communicated with hollow whipstock 12 inner chambers, does and seals up casing hanger 16, well cementation, after well cementation is finished, rotation drilling tool, the left-handed screw thread between post and the bushing pipe 1 of spudding in is given up bushing pipe.Be lowered to the baffle plate 14 that conventional drilling tool bores hollow whipstock 12, thereby realize being communicated with of main borehole and branch well hole.So repeat, can finish a plurality of branch well hole operations.

Claims (3)

1. the Multilateral Wells completion system of windowing in advance is characterized in that: comprise directional tube (6), compound whipstock (8), pre-windowing facility; Directional tube (6) upper end has directed keyway, match with the directional bond (11) of compound whipstock (8), pre-windowing facility is seated on the compound whipstock (8), and the pre-windowing (15) of pre-windowing facility is communicated with hollow whipstock (12) inner chamber of compound whipstock (8).
2. the Multilateral Wells completion system of windowing in advance according to claim 1, it is characterized in that: compound whipstock (8) is made up of interior whipstock (10), directional bond (11), baffle plate (14), position-limitting pin (13), hollow whipstock (12), interior whipstock (10) is identical with hollow whipstock (12) inclined-plane, interior whipstock (10) upper end has salvages hole (9), between hollow whipstock (12) and the interior whipstock (10) position-limitting pin (13) is arranged, hollow whipstock (12) lower end is the baffle plate (14) of drillability material.
3. the Multilateral Wells completion system of windowing in advance according to claim 1, it is characterized in that: pre-windowing facility mainly comprises pre-windowing casing nipple (3), bushing pipe (1), seal cartridge (2), rotating short-knot (4), reducing pipe nipple (5), pre-windowing casing nipple (3) is the tubular body that has the pre-windowing that matches with hollow whipstock (12) inclined-plane in sleeve pipe one side, pre-windowing (15) is a slotted eye, pre-windowing casing nipple (3) upper end connects goes up casing hanger 16, the lower end links to each other by screw thread with rotating short-knot (4), bushing pipe (1) upper end connects drill string, the lower end links to each other with rotating short-knot (4), seal cartridge (2) is arranged in the upper end between bushing pipe (1) and the pre-windowing casing nipple (3), there is step screw thread below, rotating short-knot (4) upper end, being processed with left-handed box under the step is connected with bushing pipe (1), bearing is equipped with in the lower end, rotating short-knot (4) links to each other with reducing pipe nipple (5) bottom, and reducing pipe nipple (5) connects the branch well hole casing string.
CN 200520081439 2005-02-01 2005-02-01 Window pre-killing completion device for branch well Expired - Fee Related CN2784569Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520081439 CN2784569Y (en) 2005-02-01 2005-02-01 Window pre-killing completion device for branch well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520081439 CN2784569Y (en) 2005-02-01 2005-02-01 Window pre-killing completion device for branch well

Publications (1)

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CN2784569Y true CN2784569Y (en) 2006-05-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101818619A (en) * 2010-03-24 2010-09-01 中国石油集团川庆钻探工程有限公司 Well cementation and completion structure and process for cased branch well with temporarily-sealed opening
CN102230359A (en) * 2011-07-01 2011-11-02 河南省瓦斯治理研究院有限公司 Horizontal zero-radius high-pressure hydraulic drilling method
CN109209274A (en) * 2018-08-30 2019-01-15 西华大学 A kind of bilayer sleeve oriented perforating auxiliary windowing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101818619A (en) * 2010-03-24 2010-09-01 中国石油集团川庆钻探工程有限公司 Well cementation and completion structure and process for cased branch well with temporarily-sealed opening
CN101818619B (en) * 2010-03-24 2012-07-11 中国石油集团川庆钻探工程有限公司 Well cementation and completion structure and process for cased branch well with temporarily-sealed opening
CN102230359A (en) * 2011-07-01 2011-11-02 河南省瓦斯治理研究院有限公司 Horizontal zero-radius high-pressure hydraulic drilling method
CN109209274A (en) * 2018-08-30 2019-01-15 西华大学 A kind of bilayer sleeve oriented perforating auxiliary windowing method
CN109209274B (en) * 2018-08-30 2020-06-26 西华大学 Double-layer casing directional perforation auxiliary windowing method

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C14 Grant of patent or utility model
GR01 Patent grant
C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Designer after: Wang Minsheng

Designer after: Wang Zhifeng

Designer after: Li Zuohui

Designer after: Han Laiju

Designer before: Wang Minsheng

Designer before: Wang Zhifeng

Designer before: Li Zuohui

Designer before: Han Laiju

COR Change of bibliographic data

Free format text: CORRECT: DESIGNER; FROM: WANG MINSHENG; WANG ZHIFENG; LI ZUOHUI; HAN LAIJU TO: WANG MINSHENG; WANG ZHIFENG; LI ZUOHUI; HAN LAIJU

C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee