CN205225149U - Double -barrelled notes vapour wellhead assembly of horizontal well - Google Patents
Double -barrelled notes vapour wellhead assembly of horizontal well Download PDFInfo
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- CN205225149U CN205225149U CN201520982439.9U CN201520982439U CN205225149U CN 205225149 U CN205225149 U CN 205225149U CN 201520982439 U CN201520982439 U CN 201520982439U CN 205225149 U CN205225149 U CN 205225149U
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- steam injection
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- horizontal well
- assembly
- wellhead assembly
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Abstract
The utility model provides a double -barrelled notes vapour wellhead assembly of horizontal well, it includes: big cross, its inside interconnection and longitudinal channel who is the cross form that be equipped with has installed thermal -insulated seal of tube ware assembly in longitudinal channel's top seal, and thermal -insulated seal of tube ware assembly inside has the vapour of notes through -hole, double -barrelled alternately bi -pass, it connects the upper end in big cross, annotate the vapour passageway in double -barrelled alternately bi -pass has, the periphery of interior notes vapour passageway is equipped with annotates the vapour passageway outward, and the lower part of annotating the vapour passageway outward forms the diffusion admittance along radial inside the extension, and the diffusion admittance is located the below of notes vapour passageway, a sub -unit connection universal joint of interior notes vapour passageway, universal joint annotate the vapour passageway outward and pass through the diffusion admittance and annotate the vapour through -hole to dock mutually in stretching into the notes vapour through -hole of thermal -insulated seal of tube ware assembly. The utility model discloses compact structure, it is small, light in weight, convenient operation is nimble, can alleviate working strength of worker, can annotate under the long -term high temperature of vapour process, the highly compressed condition, possesses reliable long -term sealed and impact resistance.
Description
Technical field
The utility model belongs to field of petroleum exploitation, especially a kind of horizontal well Double-pipe gas-injection wellhead assembly.
Background technology
Horizontal well Double-pipe gas-injection wellhead assembly is the important component part of horizontal well steam injection exploitation GCU, is realize fixed tubular column, different oil reservoir or the different interval of same oil reservoir is carried out to the key technology and equipment of segmentation steam injection simultaneously.The steam injection well head that existing Double-pipe gas-injection technique is used, install two big fours additional in steam flooding well head bottom, as two tubing hangers of steam injection well head, big four above hangs the integral joint tubing of φ 48mm, big four below hangs the insulated tubing of φ 114mm, this wellhead assembly has that volume is large, well head is high, the problem such as construction operation and operating difficulties.
Utility model content
The purpose of this utility model is to provide a kind of horizontal well Double-pipe gas-injection wellhead assembly, to overcome above-mentioned the deficiencies in the prior art.By adopting big four to intersect with two-tube the structure that bilateral combines, have the advantages that compact conformation, volume are little, flexible to operation, and the utility model is under the condition of gas injection process long term high temperature, high pressure, has reliable long-term seal and impact resistance.
For this reason, the utility model proposes a kind of horizontal well Double-pipe gas-injection wellhead assembly, it comprises:
Big four, its inside is provided with in cross-shaped interconnection and vertical passage, is equiped with instlated tubular sealer assembly in the top seal of described vertical passage, and described instlated tubular sealer assembly inside has steam injection through hole;
Two-tube intersection bilateral, it is connected to the upper end of described big four; Described two-tube intersection bilateral has interior steam injection passage, and the outer of described interior steam injection passage is arranged with outer steam injection passage, and the bottom of described outer steam injection passage radially extends internally formation diffusion admittance, and described diffusion admittance is positioned at the below of described steam injection passage; The bottom of described interior steam injection passage connects a universal joint, and described universal joint stretches in the steam injection through hole of described instlated tubular sealer assembly, and described outer steam injection passage is connected by described diffusion admittance and described steam injection through hole.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, the lower end of described interior steam injection passage is formed with connecting portion, and described connecting portion is in described diffusion admittance, and described universal joint is connected on described connecting portion.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, described universal joint comprises:
Variable buckle joint, its upper end is socketed on the outside of described connecting portion;
Connector, its upper end can inlay card be inner in the lower end of described variable buckle joint actively, and the lower end of described connector is stretched in the steam injection through hole of described instlated tubular sealer assembly;
Expansion loop, it is placed in described variable buckle joint, and described expansion loop is located between described connector and described connecting portion.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, the opening of diameter flaring is from the bottom to top formed at the top of described steam injection through hole, and described opening and described diffusion admittance connect.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, described outer steam injection passage is circular arc passage, and described outer steam injection passage and described diffusion admittance are concentric with described interior steam injection passage respectively.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, described outer steam injection passage is the passage of four/three-arc shape.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, the outer wall of described two-tube intersection bilateral is provided with multiple recess, and multiple described recess and described outer steam injection passage are oppositely arranged.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, the top of described vertical passage is provided with seal channel, and the diameter of described seal channel is greater than the diameter of described vertical passage; Multiple joint ring is equipped with between described instlated tubular sealer assembly and described seal channel.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, described instlated tubular sealer assembly outer cover is provided with a white steel packoff nipple, and described white steel packoff nipple is between described instlated tubular sealer assembly and described vertical passage.
Horizontal well Double-pipe gas-injection wellhead assembly described above, wherein, the top of described instlated tubular sealer assembly is arranged with an adapter sleeve, the outer wall of described adapter sleeve forms the locking inclined-plane of flaring from top to bottom, the top edge of described big four is along the circumferential direction equipped with multiple jackscrew, and described jackscrew is resisted against described locking inclined-plane.
The horizontal well Double-pipe gas-injection wellhead assembly that the utility model provides has following characteristics and advantage:
Horizontal well Double-pipe gas-injection wellhead assembly of the present utility model, compact conformation, volume is little, lightweight, flexible to operation, greatly can alleviate the working strength of workman, and under the condition of steam injection process long term high temperature, high pressure, reliably long-acting sealing and impact resistance can be possessed.
In addition, the design of the universal joint of horizontal well Double-pipe gas-injection wellhead assembly of the present utility model, can guarantee that the hand wheel valve of wellhead assembly is arranged on same perpendicular.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the utility model and explain, does not limit scope of the present utility model.Wherein:
Fig. 1 is the structural representation of horizontal well Double-pipe gas-injection wellhead assembly of the present utility model.
Fig. 2 is the enlarged schematic partial view of Fig. 1.
Fig. 3 is the structural representation of two-tube intersection bilateral of the present utility model.
Fig. 4 is that the A-A of Fig. 3 is to sectional view.
Reference numeral illustrates:
1 big four 311 opening
11 interconnection 4 universal joints
12 vertical passage 41 variable buckle joints
121 seal channel 411 stepped down part
2 two-tube intersection bilateral 42 connectors
In 21, steam injection passage 421 is topped bar portion
211 connecting portion 43 expansion loops
22 outer steam injection passage 5 joint rings
The white steel packoff nipple of 221 diffusion admittances 6
23 recess 7 adapter sleeves
The 3 tight inclined-planes of instlated tubular sealer assembly 71
31 steam injection through hole 8 jackscrews
9 thermal recovery gate valve H height
10 big four valves
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and detailed description of the invention of the present utility model be described:
As shown in Figure 1, for the structural representation of horizontal well Double-pipe gas-injection wellhead assembly that the utility model proposes, it comprises: big four 1, its inside is provided with in cross-shaped interconnection 11 and vertical passage 12, be equiped with instlated tubular sealer assembly 3 in the top seal of vertical passage 12, instlated tubular sealer assembly 3 inside has steam injection through hole 31; Two-tube intersection bilateral 2, it is connected to the upper end of big four 1; Two-tube intersection bilateral 2 has interior steam injection passage 21, and the outer of interior steam injection passage 21 is arranged with outer steam injection passage 22, and the bottom of outer steam injection passage 22 radially extends internally and forms diffusion admittance 221, and diffusion admittance 221 is positioned at the below of steam injection passage 21; The bottom of interior steam injection passage 21 connects a universal joint 4, and universal joint 4 stretches in the steam injection through hole 31 of instlated tubular sealer assembly 3, and outer steam injection passage 22 is connected by diffusion admittance 221 and steam injection through hole 31.By using the modes such as bolt connection to connect between big four 1 and two-tube intersection bilateral 2.When using horizontal well Double-pipe gas-injection wellhead assembly of the present utility model to carry out steam injection, universal joint 4 and integral joint tubing are connected to form interior steam injection string, carry out steam injection to horizontal well tiptoe; The diffusion admittance 221 of outer steam injection passage 22 bottom connects with the steam injection through hole 31 of instlated tubular sealer assembly 3, instlated tubular sealer assembly 3 directly and vacuum heat insulation tube be connected to form outer steam injection string, steam injection is carried out to horizontal well heel; The interior steam injection string of integral joint tubing and the annular space of interior steam injection string and vacuum heat insulation tube form outer steam injection string, form two strands of non-interfering vapor streams, two strands of vapor streams are according to reservoir physical property requirement, when can be implemented in motionless steam injection string, horizontal well tiptoe and horizontal well heel are joined to the dynamic conditioning of vapour amount, the utility model solves the problem of long-term some steam injections of horizontal well; And the steam that the steam in outer steam injection string is looped around in interior steam injection string is outside, the steam also in internal steam injection string plays heat insulation, insulation effect.Horizontal well Double-pipe gas-injection wellhead assembly of the present utility model, compact conformation, volume is little, lightweight, flexible to operation, greatly can alleviate the working strength of workman, and under the condition of steam injection process long term high temperature, high pressure, reliably long-acting sealing and impact resistance can be possessed.
In a feasible embodiment, the diameter of interior steam injection passage 21 is 41mm, and the height H of diffusion admittance 221 is 75mm, and diffusion admittance 221 for diameter be the circular hole of 160mm.
In addition, two thermal recovery gate valves 9 are provided with in the outside of two-tube intersection bilateral 2, two thermal recovery gate valves 9 are connected with outer steam injection passage 22 with interior steam injection passage 21 respectively, in use, realize carrying out steam injection to horizontal well Double-pipe gas-injection wellhead assembly of the present utility model by two thermal recovery gate valves 9.
As shown in Figure 2, the lower end of interior steam injection passage 21 is formed with connecting portion 211, and connecting portion 211 is positioned at diffusion admittance 221, and universal joint 4 is connected on connecting portion 211, and the setting of connecting portion 211 can make universal joint 4 be connected more firm with interior steam injection passage 21.Can adopt modes such as being threaded between universal joint 4 with connecting portion 211, the screw thread of universal joint 4 specifically can be trapezoidal thread, and the utility model does not limit this.
Wherein, universal joint 4 comprises: variable buckle joint 41, and its upper end is socketed on the outside of connecting portion 211; Connector 42, its upper end can inlay card be inner in the lower end of variable buckle joint 41 actively, and the lower end of connector 42 is stretched in the steam injection through hole 31 of instlated tubular sealer assembly 3; Expansion loop 43, it is placed in variable buckle joint 41, and expansion loop 43 is located between connector 42 and connecting portion 211.The installation of the wellhead assembly of all oil recoveries, steam injection and pressure break, requires that all hand wheel valves on same perpendicular, must facilitate the control operation of well head; And concentric double pipe steam injection well head uses tubing thread to be connected with integral joint tubing, can not ensure in more situation that valve is at same perpendicular, under normal circumstances, under the integral joint tubing entered in horizontal well do not allow to rotate, and horizontal well Double-pipe gas-injection wellhead assembly of the present utility model, by the design of universal joint 4, just can avoid this situation occurs.In addition, thermal expansion agent is equipped with in expansion loop 43 inside, and at high temperature, the thin-walled both sides of expansion loop 43 deformation can occur, the sealing in being formed between steam injection passage 21 and universal joint 4.
In a specific embodiment, the inwall lower end edge radially-inwardly projection formation stepped down part 411 of variable buckle joint 41, the outer wall upper end edge radially outward projection of connector 42 forms portion 421 of topping bar, by connector 42 after the upper end of variable buckle joint 41 penetrates, the portion of topping bar 421 of connector 42 is fastened on the stepped down part 411 of variable buckle joint 41 just, connector 42 portion of topping bar 421 can inlay card, can Arbitrary Rotation between variable buckle joint 41 and connector 42 in the stepped down part 411 of variable buckle joint 41 actively.The installation of the wellhead assembly of all oil recoveries, steam injection and pressure break, requires that all hand wheel valves on same perpendicular, must facilitate the control operation of well head, and concentric double pipe steam injection well head uses tubing thread to be connected with integral joint tubing, can not ensure in more situation that valve is at same perpendicular, namely thermal recovery gate valve 9 and big four valve 10 be not on same perpendicular, due under normal circumstances, under the integral joint tubing entered in horizontal well do not allow to rotate, and for horizontal well Double-pipe gas-injection wellhead assembly of the present utility model, when integral joint tubing to be connected in two-tube intersection bilateral 2 after steam injection passage 21, because integral joint tubing can not rotate, cause thermal recovery gate valve 9 and big four valve 10 not on same perpendicular, now, can by Arbitrary Rotation variable buckle joint 41 and connector 42, thermal recovery gate valve 9 and big four valve 10 are adjusted on same perpendicular, can guarantee that the hand wheel valve of wellhead assembly is arranged on same perpendicular.
Preferably, the opening 311 of diameter flaring is from the bottom to top formed at the top of steam injection through hole 31, and opening 311 and diffusion admittance 221 connect.Such as, opening 311 can be a horn mouth.Opening 311 and diffusion admittance 221 connect, and can increase steam circulation area, reduce flow resistance.
As shown in Figure 3, Figure 4, outer steam injection passage 22 is circular arc passage, and outer steam injection passage 22 and diffusion admittance 221 are concentric with interior steam injection passage 21 respectively.
Preferably, outer steam injection passage 22 is the passage of four/three-arc shape.
Further, the outer wall of two-tube intersection bilateral 2 is provided with multiple recess 23, and multiple recess 23 is oppositely arranged with outer steam injection passage 22.Multiple recesses 23 that two-tube intersection bilateral 2 outer wall is arranged, can ensure that the center of gravity of two-tube intersection bilateral 2 is placed in the middle, can seal and stablize when big four 1 and two-tube intersection bilateral 2 are bolted.
Preferably, as described in Figure 4, when outer steam injection passage 22 is the passage of four/three-arc shape, locate beyond four/three-arc shape passage that multiple recess 23 is located at two-tube intersection bilateral 2 external surface, the i.e. solid side of two-tube intersection bilateral 2 external surface another quadrant arc, and multiple recess 23 is the form of employing three circular arc cuttings and transition, can ensure that the center of gravity of two-tube intersection bilateral 2 is placed in the middle, can seal and stablize when making big four 1 and two-tube intersection bilateral 2 be bolted.
Further, the top of vertical passage 12 is provided with seal channel 121, and the diameter of seal channel 121 is greater than the diameter of vertical passage 12; Multiple joint ring 5 is equipped with between instlated tubular sealer assembly 3 and seal channel 121.Wherein, multiple joint ring 5 can comprise multiple graphite-seal ring and multiple brass joint ring, such as, comprise two brass joint rings and five graphite-seal rings, and two brass joint rings lay respectively at the two ends up and down of the graphite-seal rings that five are arranged continuously.The quantity of the utility model to graphite-seal ring and brass joint ring does not limit.
Further, instlated tubular sealer assembly 3 outer cover is provided with a white steel packoff nipple 6, and white steel packoff nipple 6 is between instlated tubular sealer assembly 3 and vertical passage 12.White steel packoff nipple 6 is in the process of steam injection, and the vertical passage 12 of energy automatic expansion sealing big four 1, really realizes in steam injection process, steam injection wellhead self-sealing and the function preventing from steam injection process, steam injection string being altered.Sealing between the big four 1 of the utility model horizontal well Double-pipe gas-injection wellhead assembly and instlated tubular sealer assembly 3, adopt graphite-seal ring, brass joint ring and Bai Gang packoff nipple three grades of hermetically-sealed constructions, can guarantee in long-term steam injection process, the long-term seal of big four 1 and instlated tubular sealer assembly 3.
In the embodiment that another is feasible, the top of instlated tubular sealer assembly 3 is arranged with an adapter sleeve 7, the outer wall of adapter sleeve 7 forms the locking inclined-plane 71 of flaring from top to bottom, and the top edge of big four 1 is along the circumferential direction equipped with multiple jackscrew 8, and jackscrew 8 is resisted against locking inclined-plane 71.The inclined-plane of jackscrew 8 matches with the locking inclined-plane 71 of adapter sleeve 7, and tighten multiple jackscrew 8 and can realize, by the effect of adapter sleeve 7 axial locking, preventing in steam injection process, instlated tubular sealer assembly about 3 play, affects steam injection efficiency.
Below in conjunction with accompanying drawing, installation process of the present utility model is described:
First, big four 1 elder generation and casing flange assembly and connection are on well head, instlated tubular sealer assembly 3 under enter in big four 1 before, first instlated tubular sealer assembly 3, white steel packoff nipple 6, graphite-seal ring, brass joint ring, adapter sleeve 7 are linked in sequence according to above, then the instlated tubular of diameter 114mm with instlated tubular sealer assembly 3 lower end 4
1/
2the inclined ladder lock of ＂ sleeve pipe (BCSG) pin thread connects, and instlated tubular sealer assembly 3 is sat seal channel 121 place hung in big four 1, then the jackscrew 8 on big four 1 is screwed symmetrically, next, two-tube intersection bilateral 2 with expansion loop 43, variable buckle joint 41 is threaded by connector 42, when lower complete last root 1.9 ＂ plain end oil well pipe button (TBG) integral joint tubing, the oil pipe pin thread of connector 42 is buckled (TBG) integral joint tubing box with 1.9 ＂ plain end oil well pipe be connected, finally two-tube intersection bilateral 2 and universal joint 4 and integral joint tubing are together steadily sitting on big four 1, screw the stud between two-tube intersection bilateral 2 and big four 1 symmetrically, so that two-tube intersection bilateral 2 and big four 1 are fixed together, complete the assembling of the utility model horizontal well Double-pipe gas-injection wellhead assembly.
The foregoing is only the schematic detailed description of the invention of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.And it should be noted that, each ingredient of the present utility model is not limited in above-mentioned overall applicability, the each technical characteristic described in manual of the present utility model can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the utility model covers other relevant with this case utility model point in the nature of things and combines and embody rule.
Claims (10)
1. a horizontal well Double-pipe gas-injection wellhead assembly, is characterized in that, described horizontal well Double-pipe gas-injection wellhead assembly comprises:
Big four, its inside is provided with in cross-shaped interconnection and vertical passage, is equiped with instlated tubular sealer assembly in the top seal of described vertical passage, and described instlated tubular sealer assembly inside has steam injection through hole;
Two-tube intersection bilateral, it is connected to the upper end of described big four; Described two-tube intersection bilateral has interior steam injection passage, and the outer of described interior steam injection passage is arranged with outer steam injection passage, and the bottom of described outer steam injection passage radially extends internally formation diffusion admittance, and described diffusion admittance is positioned at the below of described steam injection passage; The bottom of described interior steam injection passage connects a universal joint, and described universal joint stretches in the steam injection through hole of described instlated tubular sealer assembly, and described outer steam injection passage is connected by described diffusion admittance and described steam injection through hole.
2. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 1, it is characterized in that, the lower end of described interior steam injection passage is formed with connecting portion, and described connecting portion is in described diffusion admittance, and described universal joint is connected on described connecting portion.
3. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 2, it is characterized in that, described universal joint comprises:
Variable buckle joint, its upper end is socketed on the outside of described connecting portion;
Connector, its upper end can inlay card be inner in the lower end of described variable buckle joint actively, and the lower end of described connector is stretched in the steam injection through hole of described instlated tubular sealer assembly;
Expansion loop, it is placed in described variable buckle joint, and described expansion loop is located between described connector and described connecting portion.
4. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 1, it is characterized in that, the opening of diameter flaring is from the bottom to top formed at the top of described steam injection through hole, and described opening and described diffusion admittance connect.
5. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 1, it is characterized in that, described outer steam injection passage is circular arc passage, and described outer steam injection passage and described diffusion admittance are concentric with described interior steam injection passage respectively.
6. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 5, it is characterized in that, described outer steam injection passage is the passage of four/three-arc shape.
7. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 1, it is characterized in that, the outer wall of described two-tube intersection bilateral is provided with multiple recess, and multiple described recess and described outer steam injection passage are oppositely arranged.
8. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 1, it is characterized in that, the top of described vertical passage is provided with seal channel, and the diameter of described seal channel is greater than the diameter of described vertical passage; Multiple joint ring is equipped with between described instlated tubular sealer assembly and described seal channel.
9. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 8, it is characterized in that, described instlated tubular sealer assembly outer cover is provided with a white steel packoff nipple, and described white steel packoff nipple is between described instlated tubular sealer assembly and described vertical passage.
10. horizontal well Double-pipe gas-injection wellhead assembly as claimed in claim 1, it is characterized in that, the top of described instlated tubular sealer assembly is arranged with an adapter sleeve, the outer wall of described adapter sleeve forms the locking inclined-plane of flaring from top to bottom, the top edge of described big four is along the circumferential direction equipped with multiple jackscrew, and described jackscrew is resisted against described locking inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520982439.9U CN205225149U (en) | 2015-12-02 | 2015-12-02 | Double -barrelled notes vapour wellhead assembly of horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520982439.9U CN205225149U (en) | 2015-12-02 | 2015-12-02 | Double -barrelled notes vapour wellhead assembly of horizontal well |
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| Publication Number | Publication Date |
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| CN205225149U true CN205225149U (en) | 2016-05-11 |
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| CN201520982439.9U Active CN205225149U (en) | 2015-12-02 | 2015-12-02 | Double -barrelled notes vapour wellhead assembly of horizontal well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313748A (en) * | 2017-05-31 | 2017-11-03 | 中国石油天然气股份有限公司 | Wellhead assembly and its operating method |
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2015
- 2015-12-02 CN CN201520982439.9U patent/CN205225149U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313748A (en) * | 2017-05-31 | 2017-11-03 | 中国石油天然气股份有限公司 | Wellhead assembly and its operating method |
| CN107313748B (en) * | 2017-05-31 | 2019-06-11 | 中国石油天然气股份有限公司 | Wellhead assembly and its operating method |
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