CN101161981B - Hydraulic mechanical double-action buckling type tail pipe hanger - Google Patents
Hydraulic mechanical double-action buckling type tail pipe hanger Download PDFInfo
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- CN101161981B CN101161981B CN2007101782966A CN200710178296A CN101161981B CN 101161981 B CN101161981 B CN 101161981B CN 2007101782966 A CN2007101782966 A CN 2007101782966A CN 200710178296 A CN200710178296 A CN 200710178296A CN 101161981 B CN101161981 B CN 101161981B
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Abstract
The invention provides a hydraulic machinery difunctional expansion tail pipe hanger which is applied in the oil cementing construction . The invention is characterized in that the outer wall of the lower end of a loading tie-in is in threaded connection with an expansion pipe; the inner wall of the lower end of the loading tie-in is in threaded connection with a center pipe. The lower end of the center pipe is fixed with a sealing rubber plug through shear pins. The inner diameter of the sealing rubber plug is 8-20 millimeters smaller than that of the center pipe. An expansion plug is arranged in an annular space between the center pipe and the expansion pipe; a rubber plug pipe is connected with the lower end of the expansion pipe; the lower end of the rubber plug pipe is in threaded connection with a lower connecting pipe; a catch ring is placed on an inner circular bead of the lower connecting pipe. The diameter of a center hole of the lower part of the catch ring is smaller than the outer diameter of the lower end of the sealing rubber plug. The outer wall of the lower end of the lower connecting pipe is evenly distributed and fixed with at least two lockingdog mechanisms. The invention has the advantage that: with the hydraulic or mechanical method, tail pipes are hung on the inner wall of an underground sleeve serially and firmly, thereby improving the success ratio of cementing with tail pipes, guaranteeing the underground safety and improving the cementing quality. The invention is applicable for a deep well and a horizontal well with large displacement.
Description
Technical field:
The present invention relates to oil cementing technology field, particularly a kind of extension hanger that is used for drilling liner cementing is a kind of hydraulic machinery double function expansion type tail pipe hanger.
Background technology:
It is overlapping that the tail tube hanging cementing technology can reduce the well cementation sleeve pipe, saves sleeve pipe; Reduce cementing pressure; Simplify casing programme, solve the well cementation problem of deep-well, complicated well.
At present, the kind of extension hanger is a lot, and according to the method for operating difference that hangs tail pipe, existing extension hanger is divided into two kinds of mechanical type and fluid pressure types.The method of operating of mechanical type extension hanger put on generally being put or rotate hanger with tail tube hanging on outer layer sleeve.Be characterized in, simple to operate, save time, but its structure is had relatively high expectations to conditions down-hole.The fluid pressure type extension hanger is to rely on the effect of hydraulic pressure to make tail tube hanging on the sleeve pipe of upper strata.Be characterized in that the scope of application is big, be not subjected to the restriction of hole deviation and tail pipe length, but its complicated operation is time-consuming.The extension hanger of single operation method, in the construction in case accident occurs and can not seat hang or seat is reported the loss and lost, tubing string in the whole well must be proposed, after changing extension hanger, construct at the bottom of the lower going-into-well again, especially when inclined shaft, horizontal well, extended horizontal well, the such complicated situation of multi-bottom branch well, the complicated operation of tubing string is proposed in the well, lose time.
Chinese patent notification number CN2159452Y provides a kind of and has hung the tail pipe device automatically with the position, is that a kind of typical slip-type takes off the extension extension hanger automatically with the position, and it adopts slips and internal surface of sleeve pipe to hang.After this extension hanger seat was hung, the latus rectum of tail pipe inside was little, is unfavorable for subsequent job, and tail pipe can not rotate in being lowered to extension hanger and cemented process, and cementing quality is bad.
Existing buckling type tail pipe hanger structure is complicated.US7225880B2 is a kind of buckling type tail pipe hanger, and it utilizes hydraulic coupling distending expansion tube, and expansion tube and sleeve pipe are hung.This extension hanger adopts the mode of distending expansion tube from the top down, complex structure.
Summary of the invention
The purpose of this invention is to provide a kind of hydraulic machinery double function expansion type tail pipe hanger, finish tail tube hanging well cementation, when adopting the hydraulic method operation failure, in the time of can not the distending expansion tube, can rely on mechanical means to carry out expansion tube expansion operation.And overcome slip-type extension hanger employing slip spider extension, and it is unreliable that seat is hung, and a latus rectum diminishes behind the seat extension; Overcome buckling type tail pipe hanger and adopt the mode of distending expansion tube from the top down, baroque deficiency.
Technical solution of the present invention: hydraulic machinery double function expansion type tail pipe hanger, mainly form by sending into joint, cement plug, central tube, expansion tube, bloated plug, shear pin, sealing plug, rubber plug pipe, catch ring and following tube connector.It is characterized in that: sending into upper end of joint has screw thread, can with send into tubing string and be connected.Send into and adopt left hand thread to be connected between joint lower end outer wall and the expansion tube; Sending into joint lower end inwall is threaded with central tube.The central tube lower end is fixed with the sealing plug by shear pin.The internal diameter of sealing plug is than the little 8-20 millimeter of internal diameter of central tube.Lower end in the annular space of bloated plug between central tube and expansion tube, the bottom-up distending expansion tube of plug expands during construction.Expanding, movable sealing cooperates between plug and the central tube, and bloated plug can slide on central tube; Rubber plug pipe is connected the lower end of expansion tube; The rubber plug pipe lower end tube connector that is threaded down, there is screw thread the lower end of following tube connector, can be connected with bunch tube; Catch ring is fixed on the inner circular bead of following tube connector.The diameter in catch ring central upper portion hole is identical with sealing plug lower end external diameter, and the diameter in catch ring lower central hole is less than sealing plug lower end external diameter.Evenly distributing on the lower end outer wall of following tube connector is fixed with at least two snap mechanisms, and there is external screw thread the lower end of following tube connector, and following tube connector lower end can connect the tail pipe string that need hang in the down-hole.
Described snap mechanism comprises baffle plate, lock dog and spring, and baffle plate is welded on down on the tube connector; Lock dog is shaped as the steel plate of " L " shape, and the lower plane of lock dog is an inclined-plane; Spring is a cylindroid helical-coil compression spring, and snap mechanism embeds on the following tube connector outer wall.
More firm for expansion tube and sleeve pipe are hung, the outside of expansion tube has an annular protrusion at least, and the cross section of annular protrusion is trapezoidal, and the annular protrusion external diameter is identical with the end diameter of expansion tube.
Direct and the internal surface of sleeve pipe sealing of expansion tube outer wall; Also can adopt rubber seal, promptly on the expansion tube outer wall, be with rubber ring; Perhaps on the expansion tube outer wall, be with metal and building rubber compound sealing ring, adopt the sealing of metal and building rubber compound.
Two ends filling in that expand are the conical surface.
What the structure of the expansion tube and the plug that expands adopted is the structure of well cementation with the expansion tube and the plug that expands, and using method is identical with the expansion tube cementing method, and those skilled in the art are familiar with, and do not introduce in detail.
Beneficial effect of the present invention: said structure design of the present invention has bigger improvement, the well cementation tail tube hanging mode that breaks traditions adopts hydraulic pressure or/and mechanical means, and the bottom-up distending expansion tube of plug promotes to expand, expansion tube makes the tail pipe string firmly be suspended on the down-hole casing inwall after expanding.Malfunctioning when hydraulic system, hang to lose efficacy can not the distending expansion tube time, can change the method for mechanical drawing well cementation tubing string, the bottom-up distending expansion tube of plug that promotes to expand carries out expansion tube expansion operation.Improve the drilling liner cementing success rate, ensure downhole safety, improve cementing quality.Simple in structure, seat is hung, the seat envelope is reliable; Easy to operate; Adopt Metal Contact seat extension, seat envelope, seat is hung, an envelope quality is good; Adopt left side button to hang the tail pipe string and be lowered to mode, be applicable to big quality tail pipe string, application advantage is obvious in deep-well and extended horizontal well.
Description of drawings
Fig. 1 is a hydraulic machinery double function expansion type tail pipe hanger structural profile schematic diagram of the present invention.
Fig. 2 is the structural profile schematic diagram of snap mechanism.
Among the figure, 1. send into joint, 2. cement plug, 3. central tube, 4. expansion tube, plug 5. expands, 6. shear pin, 7. sealing plug, 8. rubber plug pipe, 9. catch ring 10. descends tube connector, 11. sleeve pipes, 12. casing coupling, 13. snap mechanisms, 14. baffle plates, 15. lock dogs, 16. springs, 17. annular protrusions.
The specific embodiment
Embodiment 1: consult accompanying drawing 1.With a specification is that the mechanical and hydraulic double-acting expansion formula extension hanger of 95/8 " 7 " is an example, is specifically described.
Sending into joint 1 maximum outside diameter is 210 millimeters.Central tube 3 length are 1355 millimeters, and internal diameter is 82 millimeters, and external diameter is 120 millimeters.Expansion tube 4 length are 1400 millimeters.There is twice annular protrusion 17 in the outside of expansion tube 4.The cross section of annular protrusion 17 is trapezoidal, and thickness is 5 millimeters.The diameter on annular protrusion 17 external edge edges is identical with the maximum gauge of expansion tube 4.
Sending into joint 1 top has screw thread, can make mechanical and hydraulic double-acting expansion formula extension hanger be connected the lower end of sending into tubing string, and mechanical and hydraulic double-acting expansion formula extension hanger is sent into the position that the down-hole hangs.Sending into joint 1 lower end outer wall is connected with expansion tube 4 left hand threads; On expansion tube 4 outer walls, be with metal and building rubber compound sealing ring.Sending into joint 1 lower end inwall is threaded with central tube 3.Central tube 3 lower ends are fixed with a sealing plug 7 by shear pin 6.The internal diameter of sealing plug 7 is littler 12 millimeters than the internal diameter of central tube 3.
The thickness of bloated plug 5 is 300 millimeters, and maximum outside diameter is 192 millimeters, and there is the conical surface at plug 5 two ends of expanding.The plug 5 that expands is enclosed within on the central tube 3, the lower end in the annular space of plug 5 between central tube 3 and expansion tube 4 that expand, and movable sealing cooperates between expand plug 5 and the central tube 3, bloatedly fills in 5 and can slide on central tube 3; Rubber plug pipe 8 is connected the lower end of expansion tube 4; The rubber plug pipe 8 lower ends tube connector 10 that is threaded down, there is screw thread the lower end of following tube connector 10; Catch ring 9 is fixed on the inner circular bead of following tube connector 10.The diameter in catch ring 9 central upper portion holes is identical with sealing plug 7 lower end external diameters, and the diameter in catch ring 9 lower central holes is less than sealing plug 7 lower end external diameters.
On the lower end outer wall of following tube connector 10, evenly distribute and be fixed with 4 snap mechanisms 13.Baffle plate 14, lock dog 15 and spring 16 are formed a snap mechanism 13.Last lower baffle plate 14 is welded on down on tube connector 10 outer walls; A lock dog 15 is arranged between two baffle plates 14, and lock dog 15 is shaped as the steel plate of " L " shape, and the lower plane of lock dog 15 is an inclined-plane; Spring 16 is a cylindroid helical-coil compression spring, and snap mechanism 13 embeds on following tube connector 10 outer walls.There is external screw thread the lower end of following tube connector 10.
There are 2 road annular protrusions 17 in the outside of expansion tube 4, and the cross section of annular protrusion 17 is trapezoidal, and height of projection is 5 millimeters.Annular protrusion 17 external diameters are identical with the end diameter of expansion tube 4.
Sketch the course of work of the present invention, help to understand the present invention.When the present invention arrives the precalculated position down along with the tail pipe string, snap mechanism 13 on the following tube connector 10 snaps in the casing coupling that is lowered in advance 12 draw-in grooves of sleeve pipe 11 lower ends, at this moment when on carry whole when sending into tubing string, following tube connector 10 and casing coupling 12 no relative motions.Under the tail pipe string behind design attitude, will design a certain amount of cement be injected into send into tubing string after, drop into cement plug 2 at once.Continue to pump into completion fluid, completion fluid promotes cement plug 2 and moves downward, in the 7 places bruising of sealing plug, cut off shear pin 6, the Compounded rubber plug that cement plug 2 and sealing plug 7 are formed continues descending under the promotion of completion fluid, scrape off cement residual on the inner wall of liner simultaneously, to catch ring 9 places secondary bruising.At this moment, turn clockwise and send into tubing string, outward winding and send into the left hand thread that is connected between joint and the expansion tube.Build the pressure once more, in tubing string, increase in the completion fluid pressure, on submit into tubing string.Promoting under completion fluid hydraulic coupling and the acting in conjunction of upper lifting pipe post mechanical force expands plug 5, central tube 3 and send into joint 1 moves upward together, distending expansion tube 4, contact of upper strata sleeve pipe 11 inwalls and bloated closing, formed the firm of metal and metal and reliable sealing, realize the seat extension of tail pipe string, give up simultaneously.After giving up, propose bloated plug 5, central tube 3 and send into joint 1, use the conventional drilling instrument can continue to creep into.
Claims (6)
1. hydraulic machinery double function expansion type tail pipe hanger, mainly form by sending into joint (1), cement plug (2), central tube (3), expansion tube (4), expand plug (5), shear pin (6), sealing plug (7), rubber plug pipe (8), catch ring (9) and following tube connector (10), it is characterized in that: sending into joint (1) upper end has screw thread, sends into that employing left hand thread is connected between joint (1) lower end outer wall and the expansion tube (4); Sending into joint (1) lower end inwall is threaded with central tube (3), central tube (3) lower end is fixed with sealing plug (7) by shear pin (6), the internal diameter of sealing plug (7) is than the little 8-20 millimeter of internal diameter of central tube (3), lower end in bloated plug (5) annular space between central tube (3) and expansion tube (4), expanding, movable sealing cooperates between plug (5) and the central tube (3), can slide on central tube (3) in bloated fill in (5); Rubber plug pipe (8) is connected the lower end of expansion tube (4); Rubber plug pipe (8) the lower end tube connector (10) that is threaded down, there is screw thread the lower end of following tube connector (10); Catch ring (9) is fixed on the inner circular bead of following tube connector (10), the diameter in catch ring (9) central upper portion hole is identical with sealing plug (7) lower end external diameter, the diameter in catch ring (9) lower central hole is less than sealing plug (7) lower end external diameter, evenly distributing on the lower end outer wall of following tube connector (10) is fixed with at least two snap mechanisms (13), and there is external screw thread the lower end of following tube connector (10).
2. hydraulic machinery double function expansion type tail pipe hanger according to claim 1 is characterized in that: described snap mechanism (13) comprises baffle plate (14), lock dog (15) and spring (16), and baffle plate (14) is welded on down on the tube connector (10); Lock dog (15) is shaped as the steel plate of " L " shape, and the lower plane of lock dog (15) is an inclined-plane; Spring (16) is a cylindroid helical-coil compression spring, and snap mechanism (13) embeds on following tube connector (10) outer wall.
3. hydraulic machinery double function expansion type tail pipe hanger according to claim 1, it is characterized in that: the outside of expansion tube (4) has an annular protrusion (17) at least, the cross section of annular protrusion (17) is trapezoidal, and annular protrusion (17) external diameter is identical with the end diameter of expansion tube (4).
4. according to claim 1,2 or 3 described hydraulic machinery double function expansion type tail pipe hangers, it is characterized in that: on expansion tube (4) outer wall, be with rubber ring.
5. according to claim 1,2 or 3 described hydraulic machinery double function expansion type tail pipe hangers, it is characterized in that: on expansion tube (4) outer wall, be with metal and building rubber compound sealing ring.
6. according to claim 1,2 or 3 described hydraulic machinery double function expansion type tail pipe hangers, it is characterized in that: two ends of the plug (5) that expands are the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101782966A CN101161981B (en) | 2007-11-29 | 2007-11-29 | Hydraulic mechanical double-action buckling type tail pipe hanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101782966A CN101161981B (en) | 2007-11-29 | 2007-11-29 | Hydraulic mechanical double-action buckling type tail pipe hanger |
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| Publication Number | Publication Date |
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| CN101161981A CN101161981A (en) | 2008-04-16 |
| CN101161981B true CN101161981B (en) | 2010-08-11 |
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| CN2007101782966A Active CN101161981B (en) | 2007-11-29 | 2007-11-29 | Hydraulic mechanical double-action buckling type tail pipe hanger |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575951B (en) * | 2008-05-05 | 2013-04-17 | 上海管力卜石油设备有限公司 | Petroleum expansion pipe hanger and construction technology |
| CN101705800B (en) * | 2009-11-18 | 2012-07-04 | 东营百华石油技术开发有限公司 | Anti-falling hanging device |
| CN103375141B (en) * | 2012-04-25 | 2016-08-10 | 中国石油天然气集团公司 | A kind of expansion device of expansion pipe |
| CN103437735B (en) * | 2013-07-25 | 2016-02-10 | 中国石油天然气集团公司 | In pipe, down-hole reducing limit body blocks spacer assembly |
| CN109736733B (en) * | 2019-02-01 | 2024-11-01 | 中国地质科学院勘探技术研究所 | Expansion pipe feeding device |
| CN113090224B (en) * | 2019-12-23 | 2023-06-30 | 中国石油天然气股份有限公司 | Guide shoe for well cementation and expansion suspension well cementation tubular column |
| CN111173466B (en) * | 2020-01-02 | 2021-10-26 | 中煤科工集团重庆研究院有限公司 | Liner hanger and using method thereof |
| CN114718490B (en) * | 2022-03-30 | 2023-11-17 | 河北上善石油机械有限公司 | Tail pipe hanger with high mechanical strength for oil field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87205516U (en) * | 1987-11-30 | 1988-08-03 | 华北石油管理局钻井工艺研究所 | Mechanical-hydraulic double action type tail pipe suspension device |
| CN200964812Y (en) * | 2006-10-05 | 2007-10-24 | 新疆蓝海石油工程技术有限责任公司 | Hydraulic expand tube type casing pipe patching tool |
| CN101122214A (en) * | 2007-09-21 | 2008-02-13 | 中国石油天然气集团公司 | Mechanical swelling type screen pipe hanger |
| CN201106425Y (en) * | 2007-11-29 | 2008-08-27 | 中国石油天然气集团公司 | Hydraulic machinery double-acting intumescence type tailpiece hanger |
-
2007
- 2007-11-29 CN CN2007101782966A patent/CN101161981B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87205516U (en) * | 1987-11-30 | 1988-08-03 | 华北石油管理局钻井工艺研究所 | Mechanical-hydraulic double action type tail pipe suspension device |
| CN200964812Y (en) * | 2006-10-05 | 2007-10-24 | 新疆蓝海石油工程技术有限责任公司 | Hydraulic expand tube type casing pipe patching tool |
| CN101122214A (en) * | 2007-09-21 | 2008-02-13 | 中国石油天然气集团公司 | Mechanical swelling type screen pipe hanger |
| CN201106425Y (en) * | 2007-11-29 | 2008-08-27 | 中国石油天然气集团公司 | Hydraulic machinery double-acting intumescence type tailpiece hanger |
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| CN101161981A (en) | 2008-04-16 |
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