CN101173601B - Rotatable hydraulic expanding type tail pipe hanger - Google Patents

Rotatable hydraulic expanding type tail pipe hanger Download PDF

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Publication number
CN101173601B
CN101173601B CN2007101782985A CN200710178298A CN101173601B CN 101173601 B CN101173601 B CN 101173601B CN 2007101782985 A CN2007101782985 A CN 2007101782985A CN 200710178298 A CN200710178298 A CN 200710178298A CN 101173601 B CN101173601 B CN 101173601B
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tube
plug
diameter
expansion tube
central
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CN101173601A (en
Inventor
张燕萍
任荣权
王辉
王军
于永亮
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China National Petroleum Corp
CNPC Engineering Technology R&D Co Ltd
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China National Petroleum Corp
CNPC Drilling Research Institute Co Ltd
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Abstract

The invention relates to a hydraulic expansive type rotatable liner hanger used for the construction of liner cementing, which is characterized in that the threads are arranged on the upper end of a load connector for connecting with the drilling tools, wherein, the external wall of the lower end of the load connector is connected with an expansion pipe via a spline, the internal wall of the lower end of the load connector is connected with a central tube via threads; a sealing rubber plug is fixed on the lower end of the central tube via shear pin and is expanded and plugged in the annular space between the central tube and the expansion pipe; the rubber plug conduit is connected with the lower end of the expansion pipe, the lower end of the rubber plug conduit is connected with a lower connecting tube via threads; a stop ring is arranged on the inside shoulder of the connecting tube, the diameter of the upper part central hole of the stop ring is equal to the outside diameter of the lower end of the sealing rubber plug, the diameter of the lower part central hole of the stop ring is less than the outside diameter of the lower end of the sealing rubber plug. The invention has the advantages that the expansion pipe is opened with hydraulic pressure to contact closely to the internal wall of the sleeve pipe for suspension of the tail tube, thus, the suspension success rate is high, and sealing quality is best, the internal diameter of the pipe column is larger, and the load connector is connected with the expansion pipe via a spline and is able to drill rotatablely with a drill bit in falling process.

Description

Rotatable hydraulic expanding type tail pipe hanger
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 rotatable hydraulic expanding 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 cemented pressure; Simplify casing programme, solve the well cementation difficult problem of deep-well, complicated well.
At present, extension hanger can be divided into slip-type and buckling type tail pipe hanger according to the mode of its extension.On the whole, it is unreliable that the slip-type extension hanger has seat to hang, and seat is hung a back latus rectum and diminished, and seat envelope effect is bad, and there is the sealing leak problem in the casing annulus cement sheath, also has problems such as the failure of giving up behind the instrument that is lowered to.
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 rotatable hydraulic expanding type tail pipe hanger, finish the tail tube hanging well cementation, and overcome slip-type extension hanger employing slip spider extension, it is unreliable that seat is hung, and 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.
The technical scheme that the present invention takes is: rotatable hydraulic expanding 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.Sending into upper end of joint has screw thread, can connect drilling tool.Send into and adopt spline 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, and the effect of following tube connector is to connect to need the tail pipe that hangs; Catch ring is sat and is put in down on the inner circular bead of tube connector.The diameter in catch ring central upper portion hole is identical with sealing plug lower end external diameter, and the internal diameter in catch ring lower central hole is less than sealing plug lower end external diameter.
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 edge is identical with the end diameter of expansion tube along diameter.
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.
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.
The invention has the beneficial effects as follows: rotatable hydraulic expanding type tail pipe hanger of the present invention advantage compared with prior art is: send into the connected mode that joint and expansion tube adopt spline.On the one hand, but in the process that tail pipe is lowered to, can be with the drill bit rotary drilling, be convenient to being lowered to smoothly of tail pipe, on the one hand, can marginal not cement limit rotary tail in cemented process, improve the cement sheath cementing quality, prolong the oil well life-span.The present invention utilizes action of hydraulic force, and the bottom-up distending expansion tube of plug promotes to expand.Utilize hydraulic pressure distending expansion tube closely to contact and hang tail pipe with internal surface of sleeve pipe.In structure design bigger improvement is arranged, the extension hanger structure that breaks traditions, this hydraulic buckling type tail pipe hanger is in the middle of practical application, and is simple in structure, easy and simple to handle; Suspension success rate height, airtight quality is good; Behind the tail tube hanging, latus rectum is big in the tubing string, is convenient to take well stimulation.
Description of drawings
Fig. 1 is a rotatable hydraulic expanding type tail pipe hanger structural profile schematic diagram of the present invention.It is the structural representation of embodiment 1.
Fig. 2 is the enlarged drawing of the A-A section of Fig. 1.
Among the figure, 1. send into joint, 2. cement plug, 3. central tube, 4. expansion tube, the plug that 5. expands, 6. shear pin, 7. sealing plug, 8. rubber plug pipe, 9. catch ring 10. descends tube connector, 11. annular protrusions.
The specific embodiment
Embodiment 1: consult Fig. 1." rotatable hydraulic expanding type tail pipe hanger of specification is an example, is elaborated with 9-5/8.
Rotatable hydraulic expanding type tail pipe hanger, sending into joint 1 upper end has NC50 drill rod thread joint, can connect 5-1/2 " drill string.Cement plug 2 can adopt conventional drilling rod plug.Central tube 3 length 1320mm, internal diameter is identical with the top rod internal diameter.The external diameter ¢ 210mm at expansion tube 4 two ends, there are 10 annular protrusions in the outside, and the annular protrusion external edge is identical with the end diameter of expansion tube 4 along diameter.The plug 5 that expands adopts the bloated plug of annular.Shear pin 6 is cut off pressure 8MPa.Sealing plug 7 dimensions are equivalent to the sleeve pipe plug.Rubber plug pipe 8 is sleeve pipes that well cementation needs suspension, can hang 7 " sleeve pipe.The effect of catch ring 9 Compounded rubber plug that to be baffle seal plugs 7 form with cement plug 2 is descending along rubber plug pipe 8, makes Compounded rubber plug in catch ring 9 places bruising.
Consult Fig. 2.Send into and adopt spline to be connected between joint 1 lower end outer wall and the expansion tube 4.Consult Fig. 1.On the expansion arc of expansion tube 4 outer walls, be with 3 rubber rings.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 annular space of plug 5 between central tube 3 and expansion tube 4 that expand, 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, and following tube connector 10 lower ends can hang tail pipe; Catch ring 9 is sat and is put in down on the inner circular bead of 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 internal diameter in catch ring 9 lower central holes is less than 18 millimeters of sealing plug 7 lower end external diameters.
Sketch the course of work of the present invention, help to understand the present invention.When the tail pipe that hangs down time the precalculated position, will design a certain amount of cement inject send into tubing string after, input cement plug 2 in tubing string.Continue to pump into completion fluid, completion fluid promotes cement plug 2 and moves downward along central tube 3 inwalls, cement plug 2 moves downward the 7 top bruisings of sealing plug, and cut off shear pin 6, the Compounded rubber plug that cement plug 2 and sealing plug 7 are formed continues descending at the promotion lower edge of completion fluid rubber plug pipe 8 inwalls, scrape off residual cement on rubber plug pipe 8 inwalls simultaneously, arrive catch ring 9 places secondary bruising.We can rotate and all send into tubing string in the well cementing of cement operation, and promptly the tail pipe that is connected with the bottom by spline drive expansion tube 4, rubber plug pipe 8, following tube connector 10 is rotated, thereby are implemented in the construction of tail pipe cementing well the overall process rotary tail.Build the pressure once more, completion fluid is continued to pump in ground, when pressure is increased to certain value, completion fluid promotes to expand plug 5 along upwards slip of central tube 3, and distending expansion tube 4 makes expansion tube 4 outer walls contact and expand with the upper strata internal surface of sleeve pipe and closes, formed firm and reliable seat envelope, realization tail pipe seat is hung.Automatically 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 to well head.
Embodiment 2: consult Fig. 1.Embodiment 2 is substantially the same manner as Example 1, and difference is: the sealing ring that is with metal and building rubber compound on the outer wall of the expansion arc of expansion tube 4.There are 5 annular protrusions 11 in the outside of expansion tube 4, and the cross section of annular protrusion 11 is trapezoidal, and annular protrusion 11 external edge are identical with the end diameter of expansion tube 4 along diameter.

Claims (4)

1. rotatable hydraulic expanding 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, can connect drilling tool, send into and adopt spline to be 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 sat and is put in down on the inner circular bead of tube connector (10), and the diameter in catch ring (9) central upper portion hole is identical with sealing plug (7) lower end external diameter, and the internal diameter in catch ring (9) lower central hole is less than sealing plug (7) lower end external diameter.
2. rotatable hydraulic expanding type tail pipe hanger according to claim 1, it is characterized in that: the outside of expansion tube (4) has an annular protrusion (11) at least, the cross section of annular protrusion (11) is trapezoidal, and annular protrusion (11) external edge is identical with the end diameter of expansion tube (4) along diameter.
3. rotatable hydraulic expanding type tail pipe hanger according to claim 1 and 2 is characterized in that: be with rubber ring on expansion tube (4) outer wall.
4. rotatable hydraulic expanding type tail pipe hanger according to claim 1 and 2 is characterized in that: be with metal and building rubber compound sealing ring on expansion tube (4) outer wall.
CN2007101782985A 2007-11-29 2007-11-29 Rotatable hydraulic expanding type tail pipe hanger Active CN101173601B (en)

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Application Number Priority Date Filing Date Title
CN2007101782985A CN101173601B (en) 2007-11-29 2007-11-29 Rotatable hydraulic expanding type tail pipe hanger

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CN101173601B true CN101173601B (en) 2010-09-01

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103790533B (en) * 2014-01-03 2016-08-17 中国石油天然气股份有限公司 Can cement the well buckling type tail pipe hanger
CN107313736B (en) * 2017-06-14 2023-06-27 威飞海洋装备制造有限公司 Novel casing head body bottom connecting device
CN109736733A (en) * 2019-02-01 2019-05-10 中国地质科学院勘探技术研究所 A kind of expansion tube tripping in device
CN110905428A (en) * 2019-12-17 2020-03-24 淮安市井神钻采机具有限公司 Composite super-expansion cementing liner hanger
CN112761538A (en) * 2021-01-15 2021-05-07 大庆石油管理局有限公司 Rotary well cementation is with passing torsional joint

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004820A2 (en) * 2001-07-06 2003-01-16 Enventure Global Technology Liner hanger
GB2401127A (en) * 2003-05-01 2004-11-03 Weatherford Lamb Expandable hanger with compliant slip system
CN2677595Y (en) * 2003-12-15 2005-02-09 金红玲 Lifting hydraulic cartridge container hanger
CN200943455Y (en) * 2006-04-20 2007-09-05 中国石化集团胜利石油管理局钻井工艺研究院 Expandable tail tube suspension device for petroleum drilling well
CN201106427Y (en) * 2007-11-29 2008-08-27 中国石油天然气集团公司 Rotatable hydraulic machinery double-acting intumescence type tailpiece hanger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004820A2 (en) * 2001-07-06 2003-01-16 Enventure Global Technology Liner hanger
GB2401127A (en) * 2003-05-01 2004-11-03 Weatherford Lamb Expandable hanger with compliant slip system
CN2677595Y (en) * 2003-12-15 2005-02-09 金红玲 Lifting hydraulic cartridge container hanger
CN200943455Y (en) * 2006-04-20 2007-09-05 中国石化集团胜利石油管理局钻井工艺研究院 Expandable tail tube suspension device for petroleum drilling well
CN201106427Y (en) * 2007-11-29 2008-08-27 中国石油天然气集团公司 Rotatable hydraulic machinery double-acting intumescence type tailpiece hanger

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