CN202914044U - Reentrant inducer for completion tubular column of multilateral well - Google Patents
Reentrant inducer for completion tubular column of multilateral well Download PDFInfo
- Publication number
- CN202914044U CN202914044U CN2012205670788U CN201220567078U CN202914044U CN 202914044 U CN202914044 U CN 202914044U CN 2012205670788 U CN2012205670788 U CN 2012205670788U CN 201220567078 U CN201220567078 U CN 201220567078U CN 202914044 U CN202914044 U CN 202914044U
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- Prior art keywords
- central tube
- tubular column
- pawl
- completion tubular
- lower body
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Abstract
The utility model discloses a reentrant inducer for a completion tubular column of a multilateral well, and relates to the technical field of machining of underground tools in the petroleum and natural gas industries. The reentrant inducer for the completion tubular column of the multilateral well comprises a central pipe, an upper body, an elastic claw, a lower body, a horse tooth-shaped ring and an adjusting ring, wherein the upper body is sleeved outside the central pipe and connected with the central pipe together, the lower body is sleeved outside the central pipe and connected with the central pipe together, the upper end of the elastic claw is in a con-shaped elastic claw structure, the elastic claw is located between the upper body and the lower body, the elastic claw can axially slide between the upper body and the lower body, the horse tooth-shaped ring is arranged between the elastic claw and the central pipe, and the adjusting ring is arranged below the horse tooth-shaped ring and located between the elastic claw and the central pipe. The reentrant inducer for the completion tubular column of the multilateral well is novel in design and simple in structure. The technical problems that in the prior art, when the completion tubular column of the multilateral well is fed into a borehole of the multilateral well, people can not judge whether the completion tubular column passes through a window of the multilateral well or not correctly in real time according to the change of the hanging load of the completion tubular column are solved.
Description
Technical field
The utility model relates to the manufacturing technology field of industrial gas oil downhole tool, exactly relates to a kind of Multilateral Wells completion tubular column reentry guide, is used for be lowered to, reentry guiding and the oil recovery gas production production of oil-gas branch well down-hole string.
Background technology
Multilateral Wells refers to get out the well of two or two wells more than the mouth in a main borehole.Multilateral Wells can be applicable to develop stratified deposit, does not possess little oil reservoir, trap block, top trapped fuel and residue wet goods that Well Development is worth.
Multilateral Wells has two advantages at technical elements: the one, can greatly improve plane and vertical oil displacement efficiency, and improve recovery ratio; The 2nd, a plurality of short branch well cylinder of available same overall length replaces a long horizontal wellbore, improves drainage area, reduces pit shaft stream and presses.Four advantages are arranged economically: the one, can greatly reduce the risk that in the comparatively serious storage of permeability non-homogeneity and anisotropy, causes owing to the error of horizontal well drilling direction; The 2nd, exploit oil reservoir in irregular shape with less well; The 3rd, reduce ground subsurface equipment and investment, improve the impact on environment; The 4th, the operation that can in a bite main borehole, implement to improve recovery ratio.
Along with the deep development of domestic and international oil-gas exploration and development, easy exploiting, self-contained large gas reservoir reduces gradually, and the exploitation of little oil reservoir, trap block, top trapped fuel and remaining oil, hypotonic special low permeability oil field has become the trend of Future Development.As the strong technical measures of these oil-gas reservoirs of exploitation, Multilateral Wells will get more and more.And the reentry technology is one of key technology of branch hole drilling, well cementation and Late reformation, the reentry instrument is the key tool in the Multilateral Wells, it comprises two kinds: the one, and can guide the Multilateral Wells bunch tube to enter the sleeve pipe reentry instrument of predetermined well, the 2nd, can guide completion tubular column to enter the oil pipe reentry instrument of predetermined well.
Publication number is CN2668843, and the Chinese patent literature that open day is on October 5th, 2005 discloses a kind of guider for branch well joining-in again.By bent sub, body, shutter, guiding is first-class forms.Bent sub and body are threaded connection, target seeker is by the steel spring plate manufacturing, be shaped as the taper shape that curves secundly, it is equidirectional that its lateral deviation direction and bent sub keep, pack into the inner chamber of body and shutter formation of the two ends that form after crooked, one end of target seeker firmly is connected with body, and the other end of target seeker is free state at the inner chamber of body and shutter formation, and shutter and body weld together.This utility model utilizes bent sub to force the natural restoring force into well casing post generation side direction back stretch and elastic workpiece target seeker to realize automatically guiding tubing string to enter the window sidetracking branch well hole.Can greatly simplify the flow chart that completion tubular column or oil recovery oil pipe reenter the sidetracking branch well hole, reduce the Multilateral Wells operating risk, shorten well construction period, reduce the drilling well investment simultaneously for realizing that reclaiming above completion practice creates favorable conditions.
But still there is following defective in the prior art take above-mentioned patent documentation as representative:
1, difficulty of processing is larger, and cost of production is high.
2, when the Multilateral Wells completion tubular column when sending into or taking out the Multilateral Wells well, can not judge by the variation of tubing string suspending weight whether completion tubular column has correctly entered or left branch well window in real time.
3, be only applicable to the Multilateral Wells well of sleeve pipe, be not suitable for bore hole Multilateral Wells well.
The utility model content
For solving the existing technical problem of above-mentioned prior art, the utility model proposes a kind of being lowered to for the oil-gas branch well down-hole string, a kind of Multilateral Wells completion tubular column reentry guide that reentry guiding and oil recovery gas production are produced, the utility model is novel, simple in structure, solved existing in the prior art " when the Multilateral Wells completion tubular column when sending into the Multilateral Wells well; can not judge by the variation of tubing string suspending weight whether completion tubular column has correctly passed through branch well window in real time " technical problem, and after by window, the Multilateral Wells completion tubular column can be locked in the Multilateral Wells, guarantee carrying out smoothly of later stage volume increase construction.
The utility model is by adopting following technical proposals to realize:
A kind of Multilateral Wells completion tubular column reentry guide, it is characterized in that: comprise central tube, upper body, play pawl, lower body, gingival cyst of mucous gland in the newborn ring and adjustment ring, described upper body is enclosed within outside the central tube and with central tube and links together, described lower body is enclosed within outside the central tube and with central tube and links together, described bullet pawl upper end is Conical Projectile pawl structure, play pawl between described upper body and lower body, and playing pawl can endwisely slip between upper body and lower body, described gingival cyst of mucous gland in the newborn ring is arranged on and plays between pawl and the central tube, below the gingival cyst of mucous gland in the newborn ring and between bullet pawl and central tube described adjustment ring is being set.
Be provided with the reverse sawtooth-type screw thread at central tube with the position that the bullet pawl cooperates, cooperate with the forward saw-tooth thread of described gingival cyst of mucous gland in the newborn ring.
Be provided with step at the central tube outer wall, be provided with step playing the pawl inwall, have the part step to overlap between central tube and the bullet pawl.
Described upper body is connected with central tube by screw thread, and by steady nail one locking.
Described lower body is connected with central tube by screw thread, and by steady nail two lockings.
Between lower body and bullet pawl, be provided with shear pin.
Compared with prior art, the beneficial effect that reaches of the utility model is as follows:
1, in the utility model, a kind of Multilateral Wells completion tubular column reentry guide by " central tube, upper body, bullet pawl, lower body, gingival cyst of mucous gland in the newborn ring and adjustment ring " formation, novel, simple in structure, the Multilateral Wells completion tubular column can be when sending into the Multilateral Wells well, whether judge completion tubular column correctly by branch well window by the variation of tubing string suspending weight, and after by window, the Multilateral Wells completion tubular column can be locked in the Multilateral Wells, guarantee carrying out smoothly of later stage volume increase construction.Be that the CN2668843 patent documentation is compared with publication number particularly, the present invention is not only applicable to the Multilateral Wells well of sleeve pipe, is applicable to too bore hole Multilateral Wells well.
2, in the utility model, be provided with the reverse sawtooth-type screw thread at central tube with the position that the bullet pawl cooperates, cooperate with the forward saw-tooth thread of described gingival cyst of mucous gland in the newborn ring, such form of structure can realize the unidirectional reverse self-locking of beating.
3, in the utility model, central tube has the part step to overlap with playing between the pawl, in certain axial range, limited the radial displacement (namely playing the reduced diameter of pawl) that plays pawl, when between bullet pawl and the central tube a certain amount of axial displacement occurs after, step no longer overlaps, play pawl and under external force radial displacement, reduced outside diameter can occur.Thereby caused the significant change of tubing string suspending weight, be convenient to ground and judge whether tubing string has correctly entered branch well hole.
4, in the utility model, upper body is connected with central tube by screw thread, and by steady nail locking.Lower body is connected with central tube by screw thread, and by steady nail locking.Such frame mode, it is more firm to connect.
5, among the present invention, below the gingival cyst of mucous gland in the newborn ring and playing between pawl and the central tube described adjustment ring is being set, such form of structure is convenient to packing into and adjusting of gingival cyst of mucous gland in the newborn ring.
Description of drawings
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments, wherein:
Fig. 1 is the structural representation of the utility model when the down-hole
Mark among the figure:
1, central tube, 2, upper body, 3, surely follow closely one, 4, play pawl, 5, lower body, 6, shear pin, 7, the gingival cyst of mucous gland in the newborn ring, 8, adjustment ring, 9, surely follow closely two.
The specific embodiment
Embodiment 1
The utility model discloses a kind of Multilateral Wells completion tubular column reentry guide, comprise central tube, upper body, play pawl, lower body, gingival cyst of mucous gland in the newborn ring and adjustment ring, described upper body is enclosed within outside the central tube and with central tube and links together, described lower body is enclosed within outside the central tube and with central tube and links together, described bullet pawl upper end is Conical Projectile pawl structure, play pawl between described upper body and lower body, and playing pawl can endwisely slip between upper body and lower body, described gingival cyst of mucous gland in the newborn ring is arranged on and plays between pawl and the central tube, below the gingival cyst of mucous gland in the newborn ring and between bullet pawl and central tube described adjustment ring is being set.Be provided with the reverse sawtooth-type screw thread at central tube with the position that the bullet pawl cooperates, cooperate with the forward saw-tooth thread of described gingival cyst of mucous gland in the newborn ring.Be provided with step at the central tube outer wall, be provided with step playing the pawl inwall, have the part step to overlap between central tube and the bullet pawl.Related gingival cyst of mucous gland in the newborn ring is the common part of this area among the application.
The utility model discloses a kind of Multilateral Wells completion tubular column reentry guide, by central tube 1, upper body 2, surely follow closely 1, play pawl 4, lower body 5, shear pin 6, gingival cyst of mucous gland in the newborn ring 7, adjustment ring 8, surely follow closely 29 and form; From top to bottom central tube 1, upper body 2, surely follow closely 1, play pawl 4, lower body 5, shear pin 6, gingival cyst of mucous gland in the newborn ring 7, adjustment ring 8, surely follow closely 29 and be linked in sequence.
Described central tube 1 has the reverse sawtooth-type screw thread with the position that bullet pawl 4 cooperates, and can realize the unidirectional reverse self-locking of beating with the forward saw-tooth thread of gingival cyst of mucous gland in the newborn ring 7; Central tube 1 has the part step to overlap with playing between the pawl 4, in certain axial range, limited the radial displacement (namely playing the reduced diameter of pawl 4) that plays pawl 4, when between bullet pawl 4 and the central tube 1 a certain amount of axial displacement occurs after, step no longer overlaps, play pawl 4 and under external force radial displacement, reduced outside diameter can occur;
Described upper body 2 is connected with central tube 1 by screw thread, and by steady nail one 3 lockings; Described bullet pawl 4 upper ends are Conical Projectile pawl structure, can slide between upper body 2 and lower body 5; Described lower body 5 is connected with central tube 1 by screw thread, and by steady nail 29 lockings; Be threaded connection adjustment ring 8 between described gingival cyst of mucous gland in the newborn ring 7 and the bullet pawl 4; Be threaded connection shear pin 6 between described lower body 5 and the bullet pawl 4.
Embodiment 3
With reference to Figure of description 1, preferred forms of the present utility model is: the lower end at central tube 1 connects guide shoe, and the upper end connects completion tubular column; The completion tubular string is lowered in the Multilateral Wells, after guide shoe enters branch well window, because the branch well window slightly larger in diameter is in lower body 5 external diameters and be slightly less than bullet pawl 4 external diameters, lower body 5 can enter branch well window smoothly, when bullet pawl 4 enters branch well window, can be hampered and to enter, continue to press down the completion tubular string this moment, shear pin 6 is cut off, play pawl 4, gingival cyst of mucous gland in the newborn ring 7, adjustment ring 8 is slided to upper body 2 directions together, behind conical surface contact upper body 2 on the bullet pawl 4, the step that overlaps that plays between pawl 4 and the central tube 1 has staggered and has lost radially position-limiting action, plays pawl 4 and shrinks external diameters and diminish, and bullet pawl 4 enters branch well window; After bullet pawl 4 entered branch well window, it is large that its external diameter becomes, and because the backward hold effect of gingival cyst of mucous gland in the newborn ring 7 plays again downward body 5 directions motion of pawl 4, this moment, completion tubular column was finished the process that enters branch well window.
When whether needs checkings completion tubular column has entered branch well window, can verify in the following way: on carry completion tubular column, play pawl 4 at the branch well window place owing to external diameter is hampered greater than the branch well window internal diameter, the tubing string suspending weight obviously increases.Simultaneously, if in the time of need to tripping out completion tubular column because of job requirements, carry completion tubular column on also can continuing, bullet pawl 4 is hampered greater than the branch well window internal diameter owing to external diameter at the branch well window place and shrinks the bullet pawl, then play pawl 4 and pass through branch well window, break away from the Multilateral Wells well, can trip out completion tubular column.
Claims (6)
1. Multilateral Wells completion tubular column reentry guide, it is characterized in that: comprise central tube (1), upper body (2), play pawl (4), lower body (5), gingival cyst of mucous gland in the newborn ring (7) and adjustment ring (8), described upper body (2) is enclosed within outside the central tube (1) and with central tube (1) and links together, described lower body (5) is enclosed within outside the central tube (1) and with central tube (1) and links together, described bullet pawl (4) upper end is Conical Projectile pawl (4) structure, playing pawl (4) is positioned between described upper body (2) and the lower body (5), and playing pawl (4) can endwisely slip between upper body (2) and lower body (5), described gingival cyst of mucous gland in the newborn ring (7) is arranged on and plays between pawl (4) and the central tube (1), in the below of gingival cyst of mucous gland in the newborn ring (7) and be positioned between bullet pawl (4) and the central tube (1) described adjustment ring (8) is set.
2. a kind of Multilateral Wells completion tubular column reentry guide according to claim 1 is characterized in that: be provided with the reverse sawtooth-type screw thread at central tube (1) with the position that bullet pawl (4) cooperates, cooperate with the forward saw-tooth thread of described gingival cyst of mucous gland in the newborn ring (7).
3. a kind of Multilateral Wells completion tubular column reentry guide according to claim 1 and 2, it is characterized in that: be provided with step at central tube (1) outer wall, be provided with step playing pawl (4) inwall, have the part step to overlap between central tube (1) and the bullet pawl (4).
4. a kind of Multilateral Wells completion tubular column reentry guide according to claim 3, it is characterized in that: described upper body (2) is connected with central tube (1) by screw thread, and by steady nail one (3) locking.
5. a kind of Multilateral Wells completion tubular column reentry guide according to claim 3, it is characterized in that: described lower body (5) is connected with central tube (1) by screw thread, and by steady nail two (9) lockings.
6. a kind of Multilateral Wells completion tubular column reentry guide according to claim 1 is characterized in that: be provided with shear pin (6) between lower body (5) and bullet pawl (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205670788U CN202914044U (en) | 2012-10-31 | 2012-10-31 | Reentrant inducer for completion tubular column of multilateral well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205670788U CN202914044U (en) | 2012-10-31 | 2012-10-31 | Reentrant inducer for completion tubular column of multilateral well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202914044U true CN202914044U (en) | 2013-05-01 |
Family
ID=48162365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205670788U Withdrawn - After Issue CN202914044U (en) | 2012-10-31 | 2012-10-31 | Reentrant inducer for completion tubular column of multilateral well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202914044U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900399A (en) * | 2012-10-31 | 2013-01-30 | 中国石油集团川庆钻探工程有限公司 | Multilateral well completion pipe string reentry leader |
-
2012
- 2012-10-31 CN CN2012205670788U patent/CN202914044U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900399A (en) * | 2012-10-31 | 2013-01-30 | 中国石油集团川庆钻探工程有限公司 | Multilateral well completion pipe string reentry leader |
| CN102900399B (en) * | 2012-10-31 | 2016-08-03 | 中国石油集团川庆钻探工程有限公司 | Multilateral Wells completion tubular column reentry guide |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130501 Effective date of abandoning: 20160803 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |