CN103758476B - Non-well cementation buckling type tail pipe hanger - Google Patents
Non-well cementation buckling type tail pipe hanger Download PDFInfo
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- CN103758476B CN103758476B CN201410003236.0A CN201410003236A CN103758476B CN 103758476 B CN103758476 B CN 103758476B CN 201410003236 A CN201410003236 A CN 201410003236A CN 103758476 B CN103758476 B CN 103758476B
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Abstract
The invention provides a kind of non-well cementation buckling type tail pipe hanger, it comprises: expansion tube, and its lower end is connected with tail pipe variable buckle; Central tube, it is located in described expansion tube, and the lower end of described central tube is connected with swollen cone seat, and the outside of described swollen cone seat is arranged with swollen cone, and the lower end of described swollen cone seat is connected with swollen cone locking jaw; The end, is blocked up, and it is connected to the lower end of described swollen cone locking jaw, and the described end is blocked up sealing and is located in described tail pipe variable buckle; Pull bar, it is located in described central tube, and the lower end of described pull bar is connected to the described end and blocks.Non-well cementation buckling type tail pipe hanger of the present invention, be applicable to non-well cementation class well-completing process, the end that this non-well cementation buckling type tail pipe hanger is connected by its swollen cone locking jaw lower end, is blocked up, and the moment higher drag entering process generation under can effectively avoiding tubing string acts on the non-well cementation buckling type tail pipe hanger that swollen cone work plane causes and is not lowered into the problem that namely position starts expansion.
Description
Technical field
The present invention has about a kind of extension hanger, especially has the non-well cementation buckling type tail pipe hanger about applying in a kind of petroleum industry field.
Background technology
Bulged tube technology is the new technology be surging forward in recent years, and it can be applicable to drilling well, completion and the operation process such as oil recovery, well workover.Expandable casing patching technology is at present very ripe, and buckling type tail pipe hanger, as a kind of new opplication structure of bulged tube technology, is faced with complex hole condition and construction technology that a lot of expandable casing patching do not face.
First, because hanger appearance and size is comparatively large, and between tunica pipe, annular space is less, and there are several layers of rubber ring to form throttle effect, hanger there will be moment high-drag in the process of going into the well, and this moment high-drag acts on swollen cone work plane, hanger can be caused not to be lowered into position and namely start to expand.
Secondly, because completion tubular column is very long, under enter be hampered in process time needs movable tubing strings, to guarantee that tubing string can smoothly in lower going-into-well, existing expansion hanger does not have rotatable function.
Therefore, be necessary to provide a kind of new hanger, overcome above-mentioned defect.
Summary of the invention
The object of this invention is to provide a kind of non-well cementation buckling type tail pipe hanger, be applicable to non-well cementation class well-completing process, the end that this non-well cementation buckling type tail pipe hanger is connected by its swollen cone locking jaw lower end, is blocked up, and the moment higher drag entering process generation under can effectively avoiding tubing string acts on the non-well cementation buckling type tail pipe hanger that swollen cone work plane causes and is not lowered into the problem that namely position starts expansion.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The invention provides a kind of non-well cementation buckling type tail pipe hanger, described non-well cementation buckling type tail pipe hanger comprises:
Expansion tube, its lower end is connected with tail pipe variable buckle;
Central tube, it is located in described expansion tube, and the lower end of described central tube is connected with swollen cone seat, and the outside of described swollen cone seat is arranged with swollen cone, and the lower end of described swollen cone seat is connected with swollen cone locking jaw;
The end, is blocked up, and it is connected to the lower end of described swollen cone locking jaw, and the described end is blocked up sealing and is located in described tail pipe variable buckle;
Pull bar, it is located in described central tube, and the lower end of described pull bar is connected to the described end and blocks; Wherein, the described end, is blocked up and is connected by shear pin with between described swollen cone locking jaw.
In a preferred embodiment, the lower end of described expansion tube is connected with two public variable buckle, and described two public variable buckle is connected with described tail pipe variable buckle.
In a preferred embodiment, the inside wall of described two public variable buckle is radially-inwardly convexly equipped with multiple spline, the lateral wall of described swollen cone locking jaw is radially outward convexly equipped with multiple locking projection, described swollen cone locking jaw is located in described two public variable buckle, and described spline is embedded between two between described locking projection.
In a preferred embodiment, dust ring is provided with between described central tube and described expansion tube.
In a preferred embodiment, the upper end of described central tube is connected with drill pipe nipple, and the outside of described drill pipe nipple is connected with expansion tube back of the body mother, and the upper end contact of described expansion tube is on described expansion tube back of the body mother.
In a preferred embodiment, the outside of described swollen cone seat is convexly equipped with joint ring, and described joint ring seals with the inside wall of described expansion tube and contacts, and described swollen cone is positioned at the upper end of described joint ring.
In a preferred embodiment, the upper end of described pull bar is radially outward convexly equipped with ring fin, and the inside wall of described swollen cone locking jaw is radially-inwardly convexly equipped with shoulders, and the internal diameter of described shoulders is less than the external diameter of described ring fin.
In a preferred embodiment, multiple sealing ring is provided with between described joint ring and described expansion tube.
In a preferred embodiment, multiple sealing ring is provided with between described swollen cone and described expansion tube.
Feature and the advantage of non-well cementation buckling type tail pipe hanger of the present invention are: projection can fitting face between the swollen cone of effective sealing and expansion tube at the joint ring of swollen cone seat lateral wall; The end being connected to swollen cone locking jaw lower end by shear pin, is blocked up, and the moment higher drag entering process generation under can effectively avoiding tubing string acts on the non-well cementation buckling type tail pipe hanger that swollen cone work plane causes and is not lowered into the problem that namely position starts expansion; In addition, multiple locking projections of swollen cone locking jaw are undertaken being embedded location by multiple splines of two public variable buckle, after in non-well cementation buckling type tail pipe hanger lower going-into-well, according to need of work rotatable well lower tubular column, prevent non-well cementation buckling type tail pipe hanger from going into the well in process, cause because tubing string is long tubing string can not smoothly under enter the problem in precalculated position.Non-well cementation buckling type tail pipe hanger of the present invention, be applicable to any non-well cementation class well-completing process, its construction technology is simple.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of non-well cementation buckling type tail pipe hanger of the present invention.
Fig. 2 is the structural representation of the swollen cone locking jaw of non-well cementation buckling type tail pipe hanger of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the invention provides a kind of non-well cementation buckling type tail pipe hanger, it comprises expansion tube 1, central tube 2, the end stifled 3 and pull bar 4, wherein: the lower end of expansion tube 1 is connected with tail pipe variable buckle 5; Central tube 2 is located in described expansion tube 1, and the lower end of described central tube 2 is connected with swollen cone seat 21, and the outside of described swollen cone seat 21 is arranged with swollen cone 22, and the lower end of described swollen cone seat 21 is connected with swollen cone locking jaw 23; The lower end that 3 are connected to described swollen cone locking jaw 23 is blocked up at the end, and stifled 3 sealings are located in described tail pipe variable buckle 5 at the described end; Pull bar 4 to be located in described central tube 2, and the lower end of described pull bar 4 is connected at the described end stifled 3.
Specifically, expansion tube 1 is substantially in cylindrical tube, and its lower end is connected with tail pipe variable buckle 5, and this tail pipe variable buckle 5 is for being connected with tail pipe tubing string.In the present invention, two public variable buckle 6 is connected with between expansion tube 1 and tail pipe variable buckle 5, the upper end outside screw of two public variable buckle 6 is connected to the lower end inside of expansion tube 1, the lower end outside of two public variable buckle 6 is threaded in inside the upper end of tail pipe variable buckle 5, the inside wall of this pair of public variable buckle 6 is radially-inwardly convexly equipped with multiple spline 61, and those splines 61 are arranged at equal intervals along the circumferencial direction of the inside wall of two public variable buckle 6.
Central tube 2 is substantially in cylindrical tube, its upper end outside screw is connected with drill pipe nipple 7, this drill pipe nipple 7 is for being connected with drilling rod tubing string, the lower end outside of drill pipe nipple 7 has been threaded the expansion tube back of the body female 71, when central tube 2 is located in after in expansion tube 1, the upper end contact of expansion tube 1 is on this expansion tube back of the body female 71.
The upper end outside screw of swollen cone seat 21 is connected to the lower end inside of central tube 2, in the present invention, the lateral wall of swollen cone seat 21 is radially outward convexly equipped with joint ring 211, sealing ring 211 seals with the inside wall of expansion tube 1 and contacts, be set in swollen cone 22 lower end contact outside swollen cone seat 21 in the upper end of sealing ring 211, the upper end contact of swollen cone 22 is in the lower end of central tube 2.
Shown in Fig. 2, the upper end inside thread of swollen cone locking jaw 23 is connected to the lower end outside of swollen cone seat 21, in the present invention, the lateral wall of swollen cone locking jaw 23 is radially outward convexly equipped with multiple locking projection 231, and those locking projections 231 are arranged at equal intervals along the circumferencial direction of the lateral wall of swollen cone locking jaw 23; Further, the lower end of swollen cone locking jaw 23 has multiple spaced locking jaw 232, the lower end of each locking jaw 232 is radially outward convexly equipped with fin 233, swollen cone locking jaw 23 is located in after in two public variable buckle 6, the spline 61 of two public variable buckle 6 is embedded between the projection of locking between two 231 of swollen cone locking jaw 23, and multiple fins 233 of swollen cone locking jaw 23 lower end are fastened on the lower end of two public variable buckle 6; In the present invention, be formed with overcurrent circuit 62 between swollen cone locking jaw 23 and two public variable buckle 6, this overcurrent circuit 62 is connected with the annular space 212 between swollen cone seat 21 outer wall and expansion tube 1 of swollen cone seat 21 joint ring 211 bottom.
The upper end that the end blocks up 3 is connected to by shear pin 31 on the fin 233 of swollen cone locking jaw 23 lower end, and the sealing of its lower end is located in tail pipe variable buckle 5.
Pull bar 4 is located in central tube, its upper end is radially outward convexly equipped with ring fin 41, and its lower end is threaded in the upper end that the end blocks up 3, in the present invention, the inside wall of swollen cone locking jaw 23 is radially-inwardly convexly equipped with shoulders 234, and the internal diameter of this shoulders 234 is less than the external diameter of ring fin 41.
The course of work of this non-well cementation buckling type tail pipe hanger is as follows: first, non-well cementation buckling type tail pipe hanger is connected to the upper end of tail pipe tubing string, drilling rod tubing string is connected to the upper end of non-well cementation buckling type tail pipe hanger, afterwards precalculated position under lower going-into-well; Now, suppress from well head water filling, water injection pressure is delivered to the upper surface that the end blocks up 3, under the effect of water injection pressure from central tube 2, be connected to the shear pin 31 blocked up between 3 and swollen cone locking jaw 23 at the end to be cut off, the end, is blocked up and 3 descending cooperations with tail pipe variable buckle 5 formed sealing state; Now, continue to suppress from well head water filling, along with the increase of water injection pressure, inject the annular space 212 that water will flow into from the overcurrent circuit 62 between swollen cone locking jaw 23 lower end and two public variable buckle 6 between swollen cone seat 21 and expansion tube 1, under the effect of the water injection pressure constantly increased, swollen cone seat 21 axially moves up, thus the card driving the locking jaw 232 of swollen cone locking jaw 23 to throw off two public variable buckle 6 lower end is established and axially moves, expand and start, now continue to suppress, swollen cone seat 21 drives the swollen cone 22 on it axially to move, and completes expansion tube 1 and to expand operation.
After treating swollen cone 22 expansion pipe 1, upper lifting pipe post, when shoulders 234 contact of swollen cone locking jaw 23 is on the ring fin 41 of pull bar 4, continue upper lifting pipe post, now its lower end of drive is threaded in the stifled 3 disengaging tail pipe variable buckles 5 in the end by pull bar 4, until the end stifled 3 is proposed well heads complete well passage.
Non-well cementation buckling type tail pipe hanger of the present invention, projection can fitting face between the swollen cone 22 of effective sealing and expansion tube 1 at the joint ring 211 of swollen cone seat 21 lateral wall; Be connected to the end stifled 3 of swollen cone locking jaw 23 lower end by shear pin 31, the moment higher drag entering process generation under can effectively avoiding tubing string acts on the non-well cementation buckling type tail pipe hanger that swollen cone work plane causes and is not lowered into the problem that namely position starts expansion; In addition, multiple locking projections 231 of swollen cone locking jaw 23 are undertaken being embedded location by multiple splines 61 of two public variable buckle 6, after in non-well cementation buckling type tail pipe hanger lower going-into-well, according to need of work rotatable well lower tubular column, prevent non-well cementation buckling type tail pipe hanger from going into the well in process, cause because tubing string is long tubing string can not smoothly under enter the problem in precalculated position.Non-well cementation buckling type tail pipe hanger of the present invention, be applicable to any non-well cementation class well-completing process, its construction technology is simple.
According to an embodiment of the invention, between described central tube 2 and described expansion tube 1, be provided with dust ring 8.This dust ring 8 enters in expansion tube 1 for preventing the impurity such as dust, and pollutes expansion tube inwall.
According to an embodiment of the invention, between described joint ring 211 and described expansion tube 1, between described swollen cone 22 and described expansion tube 1, be respectively equipped with multiple sealing ring 9.Those sealing rings 9, for sealing the gap between joint ring 211 and expansion tube 1, between swollen cone 22 and expansion tube 1, improve the sealing performance of non-well cementation buckling type tail pipe hanger.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.
Claims (9)
1. a non-well cementation buckling type tail pipe hanger, is characterized in that, described non-well cementation buckling type tail pipe hanger comprises:
Expansion tube, its lower end is connected with tail pipe variable buckle;
Central tube, it is located in described expansion tube, and the lower end of described central tube is connected with swollen cone seat, and the outside of described swollen cone seat is arranged with swollen cone, and the lower end of described swollen cone seat is connected with swollen cone locking jaw;
The end, is blocked up, and it is connected to the lower end of described swollen cone locking jaw, and the described end is blocked up sealing and is located in described tail pipe variable buckle;
Pull bar, it is located in described central tube, and the lower end of described pull bar is connected to the described end and blocks; Wherein, the described end, is blocked up and is connected by shear pin with between described swollen cone locking jaw.
2. non-well cementation buckling type tail pipe hanger as claimed in claim 1, is characterized in that, the lower end of described expansion tube is connected with two public variable buckle, and described two public variable buckle is connected with described tail pipe variable buckle.
3. non-well cementation buckling type tail pipe hanger as claimed in claim 2, it is characterized in that, the inside wall of described two public variable buckle is radially-inwardly convexly equipped with multiple spline, the lateral wall of described swollen cone locking jaw is radially outward convexly equipped with multiple locking projection, described swollen cone locking jaw is located in described two public variable buckle, and described spline is embedded between two between described locking projection.
4. non-well cementation buckling type tail pipe hanger as claimed in claim 1, is characterized in that, be provided with dust ring between described central tube and described expansion tube.
5. non-well cementation buckling type tail pipe hanger as claimed in claim 1, it is characterized in that, the upper end of described central tube is connected with drill pipe nipple, and the outside of described drill pipe nipple is connected with expansion tube back of the body mother, and the upper end contact of described expansion tube is on described expansion tube back of the body mother.
6. non-well cementation buckling type tail pipe hanger as claimed in claim 1, is characterized in that, the outside of described swollen cone seat is convexly equipped with joint ring, and described joint ring seals with the inside wall of described expansion tube and contacts, and described swollen cone is positioned at the upper end of described joint ring.
7. non-well cementation buckling type tail pipe hanger as claimed in claim 1, it is characterized in that, the upper end of described pull bar is radially outward convexly equipped with ring fin, and the inside wall of described swollen cone locking jaw is radially-inwardly convexly equipped with shoulders, and the internal diameter of described shoulders is less than the external diameter of described ring fin.
8. non-well cementation buckling type tail pipe hanger as claimed in claim 6, is characterized in that, be provided with multiple sealing ring between described joint ring and described expansion tube.
9. non-well cementation buckling type tail pipe hanger as claimed in claim 1, is characterized in that, is provided with multiple sealing ring between described swollen cone and described expansion tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003236.0A CN103758476B (en) | 2014-01-03 | 2014-01-03 | Non-well cementation buckling type tail pipe hanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003236.0A CN103758476B (en) | 2014-01-03 | 2014-01-03 | Non-well cementation buckling type tail pipe hanger |
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| CN103758476A CN103758476A (en) | 2014-04-30 |
| CN103758476B true CN103758476B (en) | 2016-04-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604508B (en) * | 2015-12-18 | 2018-04-06 | 中国石油天然气股份有限公司 | Extension hanger |
| CN110017110B (en) * | 2018-01-08 | 2021-03-23 | 中国石油化工股份有限公司 | Embedded slip liner hanger |
| CN109854201A (en) * | 2019-04-01 | 2019-06-07 | 华鼎鸿基石油工程技术(北京)有限公司 | One kind is every adopting packer and every adopting construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201460778U (en) * | 2009-07-30 | 2010-05-12 | 中国石油天然气股份有限公司 | Expansion pipe type tail pipe hanger |
| CN202325333U (en) * | 2011-12-03 | 2012-07-11 | 中国石油集团西部钻探工程有限公司 | Expandable liner hanger |
| CN202810736U (en) * | 2012-09-05 | 2013-03-20 | 上海管力卜石油设备有限公司 | Thermal recovery horizontal well expansion pipe hanger |
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