CN105443066B - A kind of low temperature resistant boll-weevil hanger - Google Patents
A kind of low temperature resistant boll-weevil hanger Download PDFInfo
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- CN105443066B CN105443066B CN201410494172.9A CN201410494172A CN105443066B CN 105443066 B CN105443066 B CN 105443066B CN 201410494172 A CN201410494172 A CN 201410494172A CN 105443066 B CN105443066 B CN 105443066B
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Abstract
The invention discloses a kind of low temperature resistant boll-weevil hanger, belong to coal-bed gas exploitation field.The low temperature resistant boll-weevil hanger includes：Tubing hanger body, low temperature resistant protection body, seal, O-ring seals and low temperature resistant seal cap, tubing hanger inner body wall top and bottom are respectively equipped with internal thread, low temperature resistant protection body is regularly enclosed on tubing hanger body exterior, seal is regularly enclosed on outside low temperature resistant protection body, seal outer wall is provided with seal groove, O-ring seals are arranged in seal groove, low temperature resistant seal cap is fixed in the annular space between seal and tubing hanger body, the present invention passes through tubing hanger body, low temperature resistant protection body, seal and low temperature resistant seal cap composition three-decker, and they are made of low temperature material, so that it is not in black brittleness transformation that the present invention works at low ambient temperatures, solves the technical barrier that low-temperature working liquid causes low temperature injury to boll-weevil hanger, meet the production requirement of coal bed gas well coal seam reservoirs phase transformation renovation technique.
Description
Technical field
The present invention relates to coal-bed gas exploitation field, more particularly to a kind of low temperature resistant boll-weevil hanger.
Background technology
Boll-weevil hanger is a kind of important component realized wellhead assembly and be connected with downhole production pipeline, and its major function is
Hang the annular space between tubing string, sealing tubing string and production string, there is provided produce passage of well liquid etc..
The boll-weevil hanger used at present includes tubing hanger body, and the upper and lower ends of tubing hanger body are equipped with internal thread,
The upper end internal thread of tubing hanger body connects with wellhead assembly, and the lower end internal thread of tubing hanger body connects with downhole oil tubing string.
During the present invention is realized, inventor has found that prior art at least has problems with：
For existing boll-weevil hanger operating temperature more than normal temperature, i.e., existing boll-weevil hanger can only be normal in oil-water well
Used under production and routine work.For coal bed gas well coal seam reservoirs phase transformation renovation technique, low-temperature working liquid be present to oil pipe suspension
Device causes the technical barrier of low temperature injury.And existing boll-weevil hanger works easily and cold temperature deficiency occurs at low temperature, it is unsatisfactory for
Requirement under low-temperature working environment.
The content of the invention
In order to solve the problems, such as that boll-weevil hanger is unsatisfactory for the requirement under low-temperature working environment in the prior art, this
Inventive embodiments provide a kind of low temperature resistant boll-weevil hanger.The technical scheme is as follows：
A kind of low temperature resistant boll-weevil hanger, the low temperature resistant boll-weevil hanger include tubing hanger body, low temperature resistant protection body,
Seal, O-ring seals and low temperature resistant seal cap, the tubing hanger inner body wall upper end and lower end are respectively equipped with internal thread, institute
State low temperature resistant protection body and be enclosed on the tubing hanger body exterior, the low temperature resistant protection body is fixed with the tubing hanger body to be connected
Connect, the seal is enclosed on outside the low temperature resistant protection body, and the seal outer wall is provided with seal groove, the O-ring seals
In the seal groove, annular space, the low temperature resistant sealing are formed between the seal and the tubing hanger body
Cap is arranged in the annular space, and the seal is fixed and connected with the low temperature resistant protection body and the low temperature resistant seal cap
Connect, and the tubing hanger body, the low temperature resistant protection body, the seal and the low temperature resistant seal cap are using low temperature resistant
Material is made.
Further, the tubing hanger body outer wall is provided with outer lug boss.
Further, the low temperature resistant protection body outer wall is provided with two stage steps, and the low temperature resistant protection body is enclosed on described outer
Above boss, the low temperature resistant protection body is spacing by the outer lug boss.
Further, the seal inwall and outer wall are equipped with one-level step, and the seal passes through the two level platform
Rank is spacing.
Further, the seal outer wall is divided into upper region and lower region, institute by the seal outer wall one-level step
Stating seal groove includes first group of seal groove and second group of seal groove, and first group of seal groove is arranged in the upper region, institute
State second group of seal groove to be arranged in the lower region, the O-ring seals include first group of O-ring seals and second group of O shape
Sealing ring, first group of O-ring seals are arranged in first group of seal groove, and second group of O-ring seals are arranged on
In second group of seal groove, the cross sectional dimensions of first group of O-ring seals and second group of O-ring seals is identical.
Specifically, the low temperature resistant seal cap inwall is provided with inner convex platform, and the inner convex platform is highly 1mm~2mm.
Specifically, the tubing hanger body and the seal are formed using the forging of low temperature resistant steel alloy.
Specifically, the low temperature resistant protection body is made from fiberglass.
Specifically, the low temperature resistant seal cap is made from silicon rubber.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Low temperature resistant boll-weevil hanger provided in an embodiment of the present invention, pass through tubing hanger body, low temperature resistant protection body, seal
And low temperature resistant seal cap composition three-decker, and they are made of low temperature resistant material so that it is of the present invention low temperature resistant
It is not in black brittleness transformation that boll-weevil hanger works at low ambient temperatures, solves low-temperature working liquid and boll-weevil hanger is made
Into the technical barrier of low temperature injury, meet the production requirement of coal bed gas well coal seam reservoirs phase transformation renovation technique.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation of low temperature resistant boll-weevil hanger provided in an embodiment of the present invention；
Fig. 2 is the structural representation of tubing hanger body provided in an embodiment of the present invention；
Fig. 3 is the structural representation of low temperature resistant protection body provided in an embodiment of the present invention；
Fig. 4 is the structural representation of low temperature resistant seal cap provided in an embodiment of the present invention；
Fig. 5 is the structural representation of seal provided in an embodiment of the present invention.
Wherein：
1 tubing hanger body, 11 internal threads, 12 outer lug boss, 2 low temperature resistant seal caps, 21 inner convex platforms, 3 first groups of O shapes sealings
Circle, 4 low temperature resistant protection bodies, 41 first order steps, 42 second level steps, 5 second groups of O-ring seals, 6 seals, 61 first groups
Seal groove, 62 second groups of seal grooves, A primary load bearing faces.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in figure 1, the embodiments of the invention provide a kind of low temperature resistant boll-weevil hanger, the low temperature resistant boll-weevil hanger
Including tubing hanger body 1, low temperature resistant protection body 4, seal 6, O-ring seals and low temperature resistant seal cap 2, the tubing hanger body
1 inwall upper end and lower end are respectively equipped with internal thread 11, and the low temperature resistant protection body 4 is enclosed on outside the tubing hanger body 1, described
Low temperature resistant protection body 4 is fixedly connected with the tubing hanger body 1, and the seal 6 is enclosed on outside the low temperature resistant protection body 4,
The outer wall of seal 6 is provided with seal groove, and the O-ring seals are arranged in the seal groove, the seal 6 and the oil
Form annular space between pipe hanger body 1, the low temperature resistant seal cap 2 is arranged in the annular space, the seal 6 with
The low temperature resistant protection body 4 and the low temperature resistant seal cap 2 are fixedly connected, and the tubing hanger body 1, the low temperature resistant protection
Body 4, the seal 6 and the low temperature resistant seal cap 2 are made of low temperature resistant material.
The present invention operation principle be：
The internal thread 11 of the upper end of tubing hanger body 1 connects with the oil pipe of well head, the He of internal thread 11 of the lower end of tubing hanger body 1
The oil pipe connection of underground is stretched into, the lower end of tubing hanger body 1 is primary load bearing face A of the invention.Low temperature resistant protection body 4 is enclosed on oil pipe
The outside of body 1 is hung, low temperature resistant protection body 4 is fixedly connected with tubing hanger body 1 so that the inwall of low temperature resistant protection body 4 and oil
The outer wall of pipe hanger body 1 is brought into close contact, and the upper surface of low temperature resistant protection body 4 is less than the upper surface of tubing hanger body 1, seal
6 are enclosed on outside low temperature resistant protection body 4, and seal 6 is fixedly connected with low temperature resistant protection body 4 so that the inwall of seal 6 with it is resistance to
The outer wall of antifreezing protection body 4 is brought into close contact, and the upper surface of seal 6 is concordant with the upper surface of tubing hanger body 1, therefore seal
An annular space is formd between 6 and tubing hanger body 1, the lower end of low temperature resistant seal cap 2 is stretched into the annular space, resistance to
The lower surface of low temperature seal cap 2 and the upper surface of low temperature resistant protection body 4 are brought into close contact, and weaken the axle that low temperature resistant protection body 4 is subject to
Impact to power, the inwall of low temperature resistant seal cap 2 are fixedly connected with the outer wall of tubing hanger body 1 so that low temperature resistant seal cap 2
The outer wall of inwall and tubing hanger body 1 is brought into close contact, and the outer wall of low temperature resistant seal cap 2 is fixedly connected with the inwall of seal 6,
So that the inwall of the outer wall and seal 6 of low temperature resistant seal cap 2 is brought into close contact, and the upper end of low temperature resistant seal cap 2 is covered in oil
On the upper surface of the tube wall of pipe hanger body 1, tubing hanger body 1 is sealed, and buffers the axial force that tubing hanger body 1 is subject to
Impact.Because of low temperature resistant seal cap 2 and the combined type sandwich of low temperature resistant protection body 4, the cryogen from latus rectum is reduced
Low temperature along the present invention the speed axially conducted.The outer wall of seal 6 is provided with sealed groove, and O-ring seals are arranged on described
In sealed groove, for sealing the annular space between the present invention and production string.And the tubing hanger body 1, resistance to low of the present invention
Warm protection body 4, seal 6 and low temperature resistant seal cap 2 are made of the material with resistance to low temperature, therefore the present invention can expire
Foot works the requirement of Transition of Brittleness will not occur at low ambient temperatures.
Low temperature resistant boll-weevil hanger provided in an embodiment of the present invention, pass through tubing hanger body 1, low temperature resistant protection body 4, sealing
Body 6 and low temperature resistant seal cap 2 form three-decker, and they are made of low temperature resistant material so that of the present invention resistance to
Low temperature boll-weevil hanger works at low ambient temperatures occurs without black brittleness transformation, solves low-temperature working liquid to boll-weevil hanger
The technical barrier of low temperature injury is caused, meets the production requirement of coal bed gas well coal seam reservoirs phase transformation renovation technique.
In addition, the present invention also have the advantages that it is high pressure resistant, compact-sized, easy to use, easily operated.
As shown in Fig. 2 the outer wall of tubing hanger body 1 is provided with outer lug boss 12.Outer lug boss 12 is close to the bottom of tubing hanger body 1
Portion, the lower surface of outer lug boss 12 is the main load-carrying surface A of the present embodiment, and the width of the upper surface of outer lug boss 12 is more than its lower surface
Width, avoid the external stress of tubing hanger body 1 from concentrating, outer lug boss 12 cut in practical work process.
As shown in figure 3, also can be found in Fig. 1, the low temperature resistant outer wall of protection body 4 is provided with two stage steps, described low temperature resistant anti-
Watch box 4 is enclosed on the top of outer lug boss 12, and the low temperature resistant protection body 4 is spacing by the outer lug boss 12.In the present embodiment,
The first order step 41 of low temperature resistant protection body 4 is located at the middle part of the low temperature resistant outer wall of protection body 4, and second level step 42 is positioned at low temperature resistant
The bottom of the outer wall of protection body 4, low temperature resistant protection body 4 are enclosed on the top of the outer lug boss 12 of tubing hanger body 1, limited by outer lug boss 12
Position, avoid, when active force of the tubing hanger body 1 by axial direction, there is relative fortune between low temperature resistant protection body 4 and tubing hanger body 1
Dynamic trend.Certainly, as it is known by the man skilled in the art that according to the production requirement of reality, the step of the outer wall of low temperature resistant protection body 4
Number can also be designed as 1 grade, 3 grades or multistage.
As shown in figure 5, referring further to Fig. 1 and Fig. 3, the inwall of seal 6 and outer wall are equipped with one-level step, the sealing
Body 6 is spacing by the two stage steps.One-level step is equipped with the middle part of the outer wall and inwall of seal 6, in the seal 6
The step of wall is hung on the first order step 41 of the low temperature resistant protection body 4, and the lower surface of the seal 6 is arranged on low temperature resistant
On the second level step 42 of protection body 4 so that the lower surface of seal 6 and the upper end of the low temperature resistant second level step 42 of protection body 4
Face is brought into close contact, i.e., described seal 6 is spacing by the two stage steps of the low temperature resistant protection body 4, avoids in use
Seal 6 is separated by the effect of axial force with low temperature resistant protection body 4 and tubing hanger body 1, loses the sealing present invention and oil
The effect of annular space between layer sleeve pipe, so as to lose the basic function of the present invention.Certainly, those of ordinary skill in the art
Understand, the number of steps of the outer wall of seal 6 can be also provided accordingly to according to the number of steps of the low temperature resistant outer wall of protection body 40 grade, 2 grades,
3 grades or multistage.
As shown in figure 5, the outer wall of seal 6 is divided into upper region and lower region by the outer wall one-level step of seal 6,
The seal groove includes first group of seal groove 61 and second group of seal groove 62, and first group of seal groove 61 is arranged on the upper area
In domain, second group of seal groove 62 is arranged in the lower region, the O-ring seals include first group of 0 type sealing ring 3 and
Second group of O-ring seals 5, first group of 0 type sealing ring 3 are arranged in first group of seal groove 61, second group of O shape
Sealing ring 5 is arranged in second group of seal groove 62, first group of 0 type sealing ring 3 and second group of O-ring seals 5
Cross sectional dimensions it is identical.By installing O-ring seals, the annular space between the present invention and production string is sealed.
Selectively, in the present embodiment, first group of seal groove, 61, second groups of seal grooves 62 may be designed as multiple, and first group of 0 type is close
3, second groups of O-ring seals 5 of seal accordingly designed with first group of seal groove, 61, second groups of seal grooves 62 respectively it is multiple, this
In embodiment, the quantity of every group of seal groove is preferably 3, and the quantity of every group of O-ring seals is preferably also three, is so designed that,
Can reach preferable sealing effectiveness, and cause it is compact-sized, be reasonably distributed.Certainly, skilled person will appreciate that, according to reality
The demand of sealing effectiveness and the needs of structure, the quantity of every group of seal groove can also be designed as 1,2,4 or multiple and right
Ying Di, the quantity of O-ring seals are also configured as 1,2,4 or multiple.Because of the one-level step that the outer wall of seal 6 is set, lead
Cause the size of the outer wall upper and lower ends of seal 6 different, therefore the diameter of O-ring seals is different, for ease of processing, selects cross section
Size identical O-ring seals, in the present embodiment, it is preferably to cross sectional dimensions is φ 7mm O-ring seals, selectively,
In the present embodiment, the size of seal groove and O-ring seals can be also designed according to the needs of actual production.
As shown in figure 4, the inwall of low temperature resistant seal cap 2 is provided with inner convex platform 21, the height of the inner convex platform 21 for 1mm~
2mm.The lower surface of inner convex platform 21 is hung on the upper surface of tubing hanger body 1, and tubing hanger body 1 is sealed, and buffers oil
The axial force that pipe hanger body 1 is subject to is impacted to the formation of tubing hanger body 1, and the height of preferred inner convex platform 21 is in the present embodiment
1.5mm。
Referring to Fig. 1, selectively, in the present embodiment, the tubing hanger body 1 and the seal 6 are using resistance to low
Temperature alloy steel forging, which is made, to be formed, the brittle transition temperature of material less than the present invention temperature in use, during use of the present invention its
Institutional framework is stable, and selectively, in the present embodiment, the tubing hanger body 1 and the seal 6 can use and with the addition of Mn
With the steel alloy of the alloying element such as Ni, such as low carbon manganese steel, manganese nickel-molybdenum steel and nickel chromium molybdenum steel material, in the present embodiment, preferably
09Mn2V forgings tubing hanger body 1 and seal 6, selectively, in the present embodiment, the tubing hanger body 1 and described close
Envelope body 6 can be also made of austenitic cryogenic steel (such as 0Cr21Ni6Mn9N and 0Cr16Ni22Mn9Mo2).
Referring to Fig. 1, the low temperature resistant protection body 4 is made from fiberglass.In this embodiment, the low temperature resistant protection body 4
A certain proportion of glass fibre is added from epoxy resin to be made, preferably glass of the mass fraction of glass fibre 30%~35%
Glass steel, selectively, other, which also can be selected, in the low temperature resistant protection body 4 has the material of lower temperature resistance, such as foam glass, poly- fluorine
Ethene, polysulfones or makrolon etc..
Referring to Fig. 1, the low temperature resistant seal cap 2 is made from silicon rubber.In the present embodiment, low-phenyl silicone rubber is selected
Material makes low temperature resistant seal cap 2, and because low-phenyl silicone rubber has excellent resistance to low temperature, it is after vulcanization at -90 DEG C
Elasticity is not lost still, therefore the purpose of the present invention can preferably be realized using low-phenyl silicone rubber material, in addition, because of low phenyl silicon rubber
Glue material matter is soft, can absorb the impulsive force from axial direction of the invention, can be to the low temperature resistant protection body 4 and tubing hanger sheet of the present invention
Body 1 forms preferable protection.In the present embodiment, the material of the low temperature resistant seal cap 2 is preferably polybutadiene rubber, poly- fourth
Diene rubber has good lower temperature resistance, elasticity is high, thermogenesis performance is low, and its glass transition temperature is -105 DEG C, can meet this hair
The requirement of bright working environment.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (9)
1. a kind of low temperature resistant boll-weevil hanger, it is characterised in that the low temperature resistant boll-weevil hanger includes tubing hanger body, resistance to low
Warm protection body, seal, O-ring seals and low temperature resistant seal cap, the tubing hanger inner body wall upper end and lower end are respectively equipped with
Internal thread, the low temperature resistant protection body are enclosed on the tubing hanger body exterior, the low temperature resistant protection body and the tubing hanger sheet
Body is fixedly connected, and the seal is enclosed on outside the low temperature resistant protection body, and the seal outer wall is provided with seal groove, the O
Shape sealing ring is arranged in the seal groove, and annular space is formed between the seal and the tubing hanger body, described resistance to
Low temperature seal cap is arranged in the annular space, the seal and the low temperature resistant protection body and the low temperature resistant seal cap
It is fixedly connected, and the tubing hanger body, the low temperature resistant protection body, the seal and the low temperature resistant seal cap use
Low temperature material is made.
2. low temperature resistant boll-weevil hanger according to claim 1, it is characterised in that the tubing hanger body outer wall is provided with outer
Boss.
3. low temperature resistant boll-weevil hanger according to claim 2, it is characterised in that the low temperature resistant protection body outer wall is provided with
Two stage steps, the low temperature resistant protection body are enclosed on above the outer lug boss, and the low temperature resistant protection body is limited by the outer lug boss
Position.
4. low temperature resistant boll-weevil hanger according to claim 3, it is characterised in that the seal inwall and outer wall are all provided with
There is an one-level step, the seal is spacing by the two stage steps.
5. low temperature resistant boll-weevil hanger according to claim 4, it is characterised in that the seal outer wall one-level step will
The seal outer wall is divided into region and lower region, and the seal groove includes first group of seal groove and second group of seal groove, institute
State first group of seal groove to be arranged in the upper region, second group of seal groove is arranged in the lower region, and the O shapes are close
Seal includes first group of O-ring seals and second group of O-ring seals, and first group of O-ring seals are arranged on described first group
In seal groove, second group of O-ring seals are arranged in second group of seal groove, first group of O-ring seals and institute
The cross sectional dimensions for stating second group of O-ring seals is identical.
6. low temperature resistant boll-weevil hanger according to claim 4, it is characterised in that the low temperature resistant seal cap inwall is provided with
Inner convex platform, the inner convex platform are highly 1mm~2mm.
7. low temperature resistant boll-weevil hanger according to claim 1, it is characterised in that the tubing hanger body and the sealing
Body is formed using the forging of low temperature resistant steel alloy.
8. low temperature resistant boll-weevil hanger according to claim 1, it is characterised in that the low temperature resistant protection body selects glass
Steel is made.
9. the low temperature resistant boll-weevil hanger according to any one of claim 1-8 claim, it is characterised in that described resistance to low
Warm seal cap is made from silicon rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494172.9A CN105443066B (en) | 2014-09-24 | 2014-09-24 | A kind of low temperature resistant boll-weevil hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494172.9A CN105443066B (en) | 2014-09-24 | 2014-09-24 | A kind of low temperature resistant boll-weevil hanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105443066A CN105443066A (en) | 2016-03-30 |
| CN105443066B true CN105443066B (en) | 2018-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410494172.9A Active CN105443066B (en) | 2014-09-24 | 2014-09-24 | A kind of low temperature resistant boll-weevil hanger |
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| CN (1) | CN105443066B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113494258A (en) * | 2021-08-27 | 2021-10-12 | 江苏宏泰石化机械有限公司 | Remote automatic control ultrahigh pressure fracturing wellhead device |
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| CN201024912Y (en) * | 2007-04-28 | 2008-02-20 | 江苏咸中石油机械有限公司 | Metal sealing petroleum tube connector |
| CN201193495Y (en) * | 2008-03-31 | 2009-02-11 | 金湖富源机械有限公司 | Metal sealing element for mandrel hanger |
| CN201310304Y (en) * | 2008-12-19 | 2009-09-16 | 什邡慧丰采油机械有限责任公司 | Oil-gas casing metal sealing device |
| CN203531813U (en) * | 2013-04-26 | 2014-04-09 | 盐城市骊麟石油机械有限公司 | Metal sealing slip-type casing hanger |
| CN204113188U (en) * | 2014-09-24 | 2015-01-21 | 中国石油天然气股份有限公司 | A kind of low temperature resistant boll-weevil hanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7740248B2 (en) * | 2003-09-18 | 2010-06-22 | Cameron International Corporation | Annular seal |
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- 2014-09-24 CN CN201410494172.9A patent/CN105443066B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201024912Y (en) * | 2007-04-28 | 2008-02-20 | 江苏咸中石油机械有限公司 | Metal sealing petroleum tube connector |
| CN201193495Y (en) * | 2008-03-31 | 2009-02-11 | 金湖富源机械有限公司 | Metal sealing element for mandrel hanger |
| CN201310304Y (en) * | 2008-12-19 | 2009-09-16 | 什邡慧丰采油机械有限责任公司 | Oil-gas casing metal sealing device |
| CN203531813U (en) * | 2013-04-26 | 2014-04-09 | 盐城市骊麟石油机械有限公司 | Metal sealing slip-type casing hanger |
| CN204113188U (en) * | 2014-09-24 | 2015-01-21 | 中国石油天然气股份有限公司 | A kind of low temperature resistant boll-weevil hanger |
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| CN105443066A (en) | 2016-03-30 |
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