CN104033141B - The heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation - Google Patents
The heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation Download PDFInfo
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- CN104033141B CN104033141B CN201410292154.2A CN201410292154A CN104033141B CN 104033141 B CN104033141 B CN 104033141B CN 201410292154 A CN201410292154 A CN 201410292154A CN 104033141 B CN104033141 B CN 104033141B
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- insulated tubing
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Abstract
The heat insulation steam injection technology tubing string of a kind of deep-layer heavy crude segmentation, enter in setting of casing under lower insulated tubing, telescoping tube is connected to the bottom of lower insulated tubing, suspended tubes is suspended on telescoping tube, heat-sensitive packer is connected to the bottom of suspended tubes, upper casing part connects setting of casing, reducing hanger is suspended on the reducing shoulder of sleeve pipe and cased junction, reducing hanger bottom is connected with the top of lower insulated tubing, the top of reducing hanger connects seal receptacle, upper insulated tubing is in sleeve pipe, the lower suspension of upper insulated tubing is on wellhead assembly, the bottom of upper insulated tubing is connected with the top of inserting joint, the bottom of inserting joint is inserted in seal receptacle, the lower surface of inserting joint is in suspension status, the weight of lower insulated tubing is suspended on the reducing shoulder of sleeve pipe and cased junction, the insulated tubing sectional suspension of full well, well depth can be made more than the full thermally insulating the borehole steam injection of deep-layer heavy crude well energy of 2000m, improve the steam injection efficiency of deep-layer heavy crude well.
Description
Technical field
The present invention is the tubing string of petroleum industry thermal production well, is the heat insulation steam injection technology tubing string of a kind of deep-layer heavy crude segmentation.
Background technology
The steam injection feature of deep-layer heavy crude is that steam injection pressure is high, wellbore heat loss is large, in order to reduce the wellbore heat loss of deep-layer heavy crude well steam injection, necessary full thermally insulating the borehole steam injection, full thermally insulating the borehole steam injection is exactly by (in sleeve pipe) in insulated tubing lower going-into-well cylinder, the steam injected flows downward and enters stratum in insulated tubing, is all insulated tubing, could reduces heat waste like this at steam from well head to ground interlayer.The heat expansion caused in order to high temperature when overcoming steam injection is extended, and can only be suspended on well head by the upper end of insulated tubing, due to the limited strength of insulated tubing, and 4
1/
2in high vacuum insulated tubing can only hang 1400m at most at well head, that is can only can realize full thermally insulating the borehole steam injection when well depth is less than the heavy oil wells steam injection of 1400m at present.Therefore, can not carry out full thermally insulating the borehole steam injection for well depth at present more than the deep-layer heavy crude well of 2000m, cause well depth large more than the deep-layer heavy crude well steam injection heat waste of 2000m, steam injection efficiency is poor, and economic benefit is low.
Summary of the invention
The object of this invention is to provide the heat insulation steam injection technology tubing string of a kind of deep-layer heavy crude segmentation, overcome prior art Problems existing, make its well depth can carry out full thermally insulating the borehole steam injection more than the deep-layer heavy crude well of 2000m, reduce heat waste, improve steam injection efficiency, increase economic benefit.
The object of the present invention is achieved like this: comprise lower insulated tubing, telescoping tube, suspended tubes, heat-sensitive packer, setting of casing, wellhead assembly, enter in setting of casing under lower insulated tubing, telescoping tube is connected to the bottom of lower insulated tubing, suspended tubes is suspended on telescoping tube, heat-sensitive packer is connected to the bottom of suspended tubes, heat-sensitive packer and setting of casing supporting, also comprise sleeve pipe, upper insulated tubing, insert joint, joint ring, seal receptacle, reducing hanger, upper sleeve pipe top is connected with wellhead assembly, upper casing part connects setting of casing, the internal diameter of upper sleeve pipe is greater than cased internal diameter, there is reducing shoulder upper sleeve pipe and cased junction, the external diameter of reducing hanger is greater than cased internal diameter, reducing hanger is suspended on the reducing shoulder of sleeve pipe and cased junction, reducing hanger bottom is connected with the top of lower insulated tubing, the weight of lower insulated tubing is made to be suspended on the reducing shoulder of sleeve pipe and cased junction, the top of reducing hanger connects seal receptacle, upper insulated tubing is in sleeve pipe, the lower suspension of upper insulated tubing is on wellhead assembly, the bottom of upper insulated tubing is connected with the top of inserting joint, the bottom of inserting joint is inserted in seal receptacle, the lower surface of inserting joint is in suspension status.
Beneficial effect of the present invention: the weight of upper insulated tubing is suspended on wellhead assembly, the weight of lower insulated tubing is suspended on the reducing shoulder of sleeve pipe and cased junction, therefore, the insulated tubing sectional suspension of full well, goal of the invention can be reached, well depth can be made to carry out full thermally insulating the borehole steam injection more than the deep-layer heavy crude well of 2000m, reduce heat waste, improve the steam injection efficiency of well depth more than the deep-layer heavy crude well of 2000m, greatly increase the economic benefit of well depth more than the deep-layer heavy crude well of 2000m.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Detailed description of the invention
Be described below in conjunction with accompanying drawing 1 pair of embodiments of the invention.
As seen from the figure, embodiments of the invention comprise sleeve pipe 1, upper insulated tubing 2, insert joint 3, joint ring 4, seal receptacle 5, lower insulated tubing 7, telescoping tube 8, suspended tubes 9, heat-sensitive packer 10, setting of casing 11, wellhead assembly 12, reducing hanger 13, lower insulated tubing enters for 7 times in setting of casing 11, telescoping tube 8 is connected to the bottom of lower insulated tubing 7, suspended tubes 9 is suspended on telescoping tube 8, heat-sensitive packer 10 is connected to the bottom of suspended tubes 9, heat-sensitive packer 10 is supporting with setting of casing 11, upper sleeve pipe 1 top is connected with wellhead assembly 12, upper sleeve pipe 1 bottom connects setting of casing 11, the internal diameter of upper sleeve pipe 1 is greater than the internal diameter of setting of casing 11, upper sleeve pipe 1 has reducing shoulder with the junction of setting of casing 11, the external diameter of reducing hanger 13 is greater than the internal diameter of setting of casing 11, reducing hanger 13 is suspended on sleeve pipe 1 with on the reducing shoulder of the junction of setting of casing 11, reducing hanger 13 bottom is connected with the top of lower insulated tubing 7, the weight of lower insulated tubing 7 is made to be suspended on sleeve pipe 1 with on the reducing shoulder of the junction of setting of casing 11, the top of reducing hanger 13 connects seal receptacle 5, upper insulated tubing 2 is in sleeve pipe 1, the lower suspension of upper insulated tubing 2 is on wellhead assembly 12, the bottom of upper insulated tubing 2 is connected with the top of inserting joint 3, the bottom of inserting joint 3 is inserted in seal receptacle 5, the lower surface of inserting joint 3 is in suspension status, insert between joint 3 and seal receptacle 5 and joint ring 4 is installed, joint ring 4 actual installation is in the slotted eye inserting joint 3 upper inside wall, joint ring 4 processes with exotic material, heatproof is higher than 350 DEG C, vapour is not leaked when ensureing steam injection.Fill joint ring as uneasy herein, then the fit clearance between requirement insertion joint 3 and seal receptacle 5 is within 0.02mm, and sealing surface length is greater than 0.9m.
Further measure of the present invention is that reducing hanger 13 arranges UNICOM's hole slot 6, the upper end of UNICOM's hole slot 6 and upper sleeve pipe 1 UNICOM, the lower end of UNICOM's hole slot 6 and setting of casing 11 UNICOM.UNICOM's hole slot 6 is set and can makes sleeve pipe and setting of casing UNICOM, the pressure in sleeve pipe can be observed, circulation well cleanup can be realized, also the load of lifting means can be alleviated when fishing for lower instlated tubular 9, because reducing hanger 13 does not have pressure reduction, the piston effect of reducing hanger 13 can also be eliminated simultaneously, avoid, at proposition reducing hanger 13, blowout occurs.
During enforcement, upper sleeve pipe 1 generally selects 9
1/
2the sleeve pipe of in, setting of casing 11 generally selects 7in sleeve pipe, the degree of depth of upper sleeve pipe 1 is less than 1400m, the length of upper insulated tubing 2 is also just less than 1400m, can meet requirement of strength, tubing string is reliable, and upper insulated tubing 2, lower insulated tubing 7 all adopt 4in high vacuum insulated tubing, the heat-proof quality of this instlated tubular is best, and high vacuum insulated tubing can only produce 4in specification at present.Therefore, the assembled casing that the present invention adopts can realize full well and adopt 4in high vacuum insulated tubing, can improve the development effectiveness of deep-layer heavy crude well.
When construction is gone into the well, first with high strength tubing by seal receptacle 5, lower insulated tubing 7, telescoping tube 8, suspended tubes 9, heat-sensitive packer 10, reducing hanger 13 G.I.H, reducing hanger 13 is made to be suspended on sleeve pipe 1 with on the reducing shoulder of the junction of setting of casing 11, then high strength tubing is made to be separated rear proposition with seal receptacle 5, high strength tubing, enter down upper insulated tubing 2 again, insert joint 3, insertion joint 3 bottom is made to insert in seal receptacle 5, when upper insulated tubing 2 upper end is suspended on wellhead assembly 12, insert joint 3 lower end and be in free state, the weight of insulated tubing 2 is made all to be suspended on wellhead assembly 12, do not bend after when ensureing steam injection, above insulated tubing 2 is subject to thermal stretching.
Claims (3)
1. the heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation, comprise lower insulated tubing (7), telescoping tube (8), suspended tubes (9), heat-sensitive packer (10), setting of casing (11), wellhead assembly (12), enter under lower insulated tubing (7) in setting of casing (11), telescoping tube (8) is connected to the bottom of lower insulated tubing (7), suspended tubes (9) is suspended on telescoping tube (8), heat-sensitive packer (10) is connected to the bottom of suspended tubes (9), heat-sensitive packer (10) is supporting with setting of casing (11), it is characterized in that: also comprise sleeve pipe (1), upper insulated tubing (2), insert joint (3), joint ring (4), seal receptacle (5), reducing hanger (13), upper sleeve pipe (1) top is connected with wellhead assembly (12), upper sleeve pipe (1) bottom connects setting of casing (11), the internal diameter of upper sleeve pipe (1) is greater than the internal diameter of setting of casing (11), upper sleeve pipe (1) has reducing shoulder with the junction of setting of casing (11), the external diameter of reducing hanger (13) is greater than the internal diameter of setting of casing (11), reducing hanger (13) is suspended on sleeve pipe (1) with on the reducing shoulder of the junction of setting of casing (11), reducing hanger (13) bottom is connected with the top of lower insulated tubing (7), the weight of lower insulated tubing (7) is made to be suspended on sleeve pipe (1) with on the reducing shoulder of the junction of setting of casing (11), the top of reducing hanger (13) connects seal receptacle (5), upper insulated tubing (2) is in sleeve pipe (1), the lower suspension of upper insulated tubing (2) is on wellhead assembly (12), the bottom of upper insulated tubing (2) is connected with the top of inserting joint (3), the bottom of inserting joint (3) is inserted in seal receptacle (5), the lower surface of inserting joint (3) is in suspension status.
2. the heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation according to claim 1, is characterized in that: insert between joint (3) and seal receptacle (5) and install joint ring (4).
3. the heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation according to claim 1, it is characterized in that: reducing hanger (13) is arranged UNICOM's hole slot (6), the upper end of UNICOM's hole slot (6) and upper sleeve pipe (1) UNICOM, the lower end of UNICOM's hole slot (6) and setting of casing (11) UNICOM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410292154.2A CN104033141B (en) | 2014-06-26 | 2014-06-26 | The heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410292154.2A CN104033141B (en) | 2014-06-26 | 2014-06-26 | The heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation |
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| Publication Number | Publication Date |
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| CN104033141A CN104033141A (en) | 2014-09-10 |
| CN104033141B true CN104033141B (en) | 2016-04-06 |
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| CN201410292154.2A Active CN104033141B (en) | 2014-06-26 | 2014-06-26 | The heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612641B (en) * | 2015-02-04 | 2015-11-04 | 中国石油大学(华东) | A kind of note adopts integrated pipe column and method for designing thereof |
| CN108301815A (en) * | 2017-05-18 | 2018-07-20 | 中国石油化工股份有限公司 | The two-tube zone separate injection technical string of secondary suspension |
| CN110094191B (en) * | 2018-01-29 | 2021-06-29 | 中国石油化工股份有限公司 | Forced segmented injection-production pipe column and method for thermal production well |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4396064A (en) * | 1981-05-14 | 1983-08-02 | Atlantic Richfield Company | Method and apparatus for injecting a gaseous stream into a subterranean zone |
| US4385663A (en) * | 1981-08-03 | 1983-05-31 | Chevron Research Company | Packerless well completion assembly |
| CN102352744A (en) * | 2011-10-31 | 2012-02-15 | 徐龙欣 | Circulating hot water heavy oil thermal recovery system for ultra-deep well and process thereof |
| CN202914058U (en) * | 2012-08-15 | 2013-05-01 | 中国石油天然气股份有限公司 | Concentric double oil pipe steam injection distribution process pipe column of steam assisted gravity drainage (SAGD) steam injection well |
| CN203008883U (en) * | 2013-01-13 | 2013-06-19 | 王旭剑 | Steam injection oil production technique pipe column |
| CN203925456U (en) * | 2014-06-26 | 2014-11-05 | 中国石油化工股份有限公司 | The heat insulation steam injection technology tubing string of deep-layer heavy crude segmentation |
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