CN203925434U - Underground natural gas storage tank horizontal well completion tubular pile - Google Patents
Underground natural gas storage tank horizontal well completion tubular pile Download PDFInfo
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- CN203925434U CN203925434U CN201420249549.XU CN201420249549U CN203925434U CN 203925434 U CN203925434 U CN 203925434U CN 201420249549 U CN201420249549 U CN 201420249549U CN 203925434 U CN203925434 U CN 203925434U
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Abstract
The utility model is a kind of underground natural gas storage tank horizontal well completion tubular pile, comprises outer tubing string and is arranged in the internal layer tubing string in outer tubing string; Internal layer tubing string is made up of with being connected in production string string bottom and being horizontally disposed screen casing string the production string string on top; The bottom of screen casing string is provided with well-flushing seal assembly and guide shoe, and screen casing string comprises multistage screen casing and is connected in first between each section of screen casing meets oily swell packers; Production string string comprises multistage hermetic seal retaining ring pipe and is linked in sequence from top to bottom the stage cementing device between each hermetic seal retaining ring pipe, permanent pressure-expandable external packer of pipe, pitching closing type blind plate and float collar; Between production string string and screen casing string, be connected with one second and meet oily swell packers; The second chance setting position of oily swell packers and the bottom position of outer tubing string are corresponding.The utility model bobbin seal is good, cementing quality is high, corrosion resistance is strong, long service life, reaches application life more than 50 years.
Description
Technical field
The utility model is to bore completion equipment about a kind of petroleum gas, relates in particular to a kind of underground natural gas storage tank horizontal well completion tubular pile.
Background technology
Characteristic inflammable, explosive, that easily alter that underground natural gas storage tank natural gas has, the natural gas leaking event that gas storage occurs at present, great majority are to alter and move leakage from the sleeve pipe of note gas recovery well or note gas recovery well casing cementing cement plane because pit shaft engineering reason causes natural gas, therefore in the construction of gas storage, the most important thing is to consider the sealing problem of gas storage, ensure that the natural gas of underground storage can not be to non-gas-bearing reservoir migration.
Gas storage injection-production well has gas injection, gas production dual-use function, in its well, medium is that two-way airflow is moving, injection, extraction pressure and temperature constantly change simultaneously, be not subject to the restriction of recoverable reserves the application life of well, will keep more than 50 years application life, so intensity to completion pipe string, sealing, corrosion resistance etc. propose higher index.In addition, gas storage in use strata pressure changes repeatedly, thereby the fixed quality of cement strength, compactness and cement sheath and sleeve pipe, the borehole wall is proposed to requirements at the higher level, whole notes at well were adopted in the phase, must not occur gas leakage, alter and move, so as not to cause economic loss, affect well useful life and occur unsafe factor.
Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes a kind of underground natural gas storage tank horizontal well completion tubular pile, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of underground natural gas storage tank horizontal well completion tubular pile, to improve sealing performance and the cementing quality of underground natural gas storage tank horizontal well completion.
Another object of the present utility model is to provide a kind of underground natural gas storage tank horizontal well completion tubular pile, to improve corrosion resistance, to increase the service life.
The purpose of this utility model is achieved in that a kind of underground natural gas storage tank horizontal well completion tubular pile, comprises outer tubing string and is arranged in the internal layer tubing string in outer tubing string; Described internal layer tubing string is made up of with being connected in production string string bottom and being horizontally disposed screen casing string the production string string on top; The bottom of described screen casing string is provided with well-flushing seal assembly and guide shoe, and described screen casing string comprises multistage screen casing and is connected in first between each section of screen casing meets oily swell packers; Described production string string comprises multistage hermetic seal retaining ring pipe and is linked in sequence from top to bottom the stage cementing device between each hermetic seal retaining ring pipe, permanent pressure-expandable external packer of pipe, pitching closing type blind plate and float collar; Between described production string string and screen casing string, be connected with one second and meet oily swell packers; Described the second chance setting position of oily swell packers and the bottom position of outer tubing string are corresponding.
In a preferred embodiments of the present utility model, second in described internal layer tubing string met the riding position of oily swell packers, and for its axially upper half is positioned at outer tubing string, second half stretches out outer tubing string.
In a preferred embodiments of the present utility model, between described production string string and screen casing string, be also connected with airtight closure diameter changing nipple.
In a preferred embodiments of the present utility model, the first axial length of meeting oily swell packers is 2m; The described second axial length of meeting oily swell packers is 7m.
In a preferred embodiments of the present utility model, screen casing string is provided with multiple screen casing centralizers; Described production string string is provided with multiple casing stabbing boards.
In a preferred embodiments of the present utility model, outer tubing string is the protective casing being made up of hermetic seal retaining ring pipe.
In a preferred embodiments of the present utility model, in described internal layer tubing string, the bottom of the first paragraph hermetic seal retaining ring pipe being arranged downwards by well head is connected with stage cementing device and permanent pressure-expandable external packer of pipe, permanent pressure-expandable external packer of pipe connects second segment hermetic seal retaining ring pipe again, second segment hermetic seal button casing shoe connects pitching closing type blind plate and float collar, float collar connects the 3rd section of hermetic seal retaining ring pipe again, and the 3rd section of hermetic seal retaining ring pipe met oily swell packers by second and connected screen casing string.
In a preferred embodiments of the present utility model, the gentle seal buckle sleeve pipe of screen casing all adopts L8013Cr type stainless steel tube.
From the above mentioned, underground natural gas storage tank of the present utility model horizontal well completion tubular pile adopts multi-sealed measure, guarantees sealing and the safety of gas storage finishing drilling pit shaft.In addition, the gentle seal buckle sleeve pipe of screen casing adopts L8013Cr type stainless steel tube, has higher intensity and stronger erosive wear resistance, the application life that can improve completion tubular column.
Brief description of the drawings
The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the utility model underground natural gas storage tank horizontal well completion tubular pile schematic diagram.
Detailed description of the invention
Understand for technical characterictic of the present utility model, object and effect being had more clearly, now contrast brief description of the drawings detailed description of the invention of the present utility model.
As shown in Figure 1, the utility model proposes a kind of underground natural gas storage tank horizontal well completion tubular pile 100, described completion tubular column 100 comprises outer tubing string and is arranged in the internal layer tubing string in outer tubing string; Outer tubing string is the protective casing 14 being made up of hermetic seal retaining ring pipe, and protective casing 14 is lowered into 1～2m place, reservoir top; Internal layer tubing string is made up of with being connected in production string string bottom and being horizontally disposed screen casing string 3 the production string string 13 on top; The bottom of screen casing string 3 is provided with well-flushing seal assembly 2 and guide shoe 1, and screen casing string 3 comprises multistage screen casing 31 and is connected in first between each section of screen casing 31 meets oily swell packers 5; First to meet the axial length of oily swell packers 5 be 2m, and first meets oily swell packers 5 is divided into some well sections by screen casing string 3 and the annular space of interlayer externally, to realize sectional well completion; Screen casing string 3 outer cover are provided with multiple screen casing centralizers 4; Production string string 13 comprises multistage hermetic seal retaining ring pipe and is linked in sequence from top to bottom the stage cementing device 12 between each hermetic seal retaining ring pipe, permanent pressure-expandable external packer of pipe 10, pitching closing type blind plate 9 and float collar 8; Production string string 13 is provided with multiple casing stabbing boards 11; Between production string string 13 and screen casing string, be connected with the second chance oil swell packers 7, this second chance setting position of oily swell packers 7 and position, the bottom of outer tubing string (being the A place, bottom of protective casing 14) are corresponding, thus, seal the annular space between oil reservoir bunch tube 13 and protective casing 14 by the second chance oil swell packers 7, play the effect that ensures sealing.
In internal layer tubing string second met the riding position of oily swell packers 7, and for its axially upper half is positioned at the inner side, bottom of outer tubing string, second half stretches out outside, outer tubing string bottom; In the present embodiment, the second axial length of meeting oily swell packers 7 is 7m, and the position of its axial length half is positioned at the inner side, bottom of protective casing 14, and the second axial length of meeting oily swell packers 7 respectively accounts for 3.5m in protective casing 14 and barefoot interval.
According to the difference of caliber or screw thread, between production string string and screen casing string, be also connected with airtight closure diameter changing nipple 6 or hermetic seal variable buckle pipe nipple (not shown).
As shown in Figure 1, in the present embodiment, the bottom of the first paragraph hermetic seal retaining ring pipe 131 that internal layer tubing string is arranged downwards by well head is connected with stage cementing device 12 and permanent pressure-expandable external packer of pipe 10, permanent pressure-expandable external packer of pipe 10 connects second segment hermetic seal retaining ring pipe 132 again, second segment hermetic seal button casing shoe connects pitching closing type blind plate 9 and float collar 8, float collar 8 connects 133, the three sections of hermetic seal retaining ring pipes of the 3rd section of hermetic seal retaining ring pipe again and connects screen casing string 3 by the oily swell packers 7 of the second chance, airtight closure diameter changing nipple 6.
In the present embodiment, the gentle seal buckle sleeve pipe of screen casing 31 all adopts L8013Cr type stainless steel tube, to improve erosive wear resistance.Screen casing 31 adopts 316LSS or alloy 20 to weave screen pack (not shown); the stainless steel outer protective cover (not shown) in screen pack outside weldings one deck spiral cloth hole; sand control strainability and the erosive wear resistance that can improve screen casing, extend its application life.
The process that adopts completion tubular column of the present utility model to carry out completion construction to a concrete underground natural gas storage tank horizontal well below:
(1) two exploitation uses Ф 311.1mm bit drills to 2515m, target zone 3-4m left by brill, preparation is lowered to diameter Ф 244.5mm, grade of steel N80, wall thickness 11.99mm, airtight closure protective casing 14, complete well cementation in envelope target zone 1～2m, cement returns to ground, realizes target zone low-density specially hit the target standby for bottom.
(2) before protective casing 14 well cementation, do stratum pressure-bearing test, and according to strata condition, carry out pressure-bearing blocking construction according to preferred pressure-bearing leak stopping formula: pressure-bearing leak stopping slurry is squeezed into behind shaft bottom, close blowout preventer, intermittently build the pressure to pumping into drilling fluid in well, monitor standpipe pressure and casing pressure simultaneously, in the time that casing pressure reaches setting value, voltage stabilizing is to setting-up time; As pressure drop, look the degree of decrease speed and decline, adjust and pump into drilling well liquid measure and build the pressure the time; So repeatedly, until the pressure-bearing value of expection is stablized and reached to casing pressure; Standpipe pressure refers in drilling process, annular pressure in drilling rod, and casing pressure refers to drilling rod and sleeve ring space pressure.
(3) be lowered to airtight closure protective casing string, coordinated hermetic seal to detect team and detect one by one hermetic seal screw thread, guaranteed the overall tightness of protective casing 14.
(4) protective casing 14 adopts equilibrium pressure cementing technology two-stage cementing, lower well section adopts latex anti-gas channeling elastic cement slurry, top well section adopts high intensity low density cement paste, this combination, effectively sealing stratum, and the equal yield density that has reduced leakiness stratum, has prevented leakage generation, has effectively reduced construction risk.
(5) Hou Ning 48h survey sound width and acoustic imaging after protective casing 14 well cementation, check cementing quality, can spud in after qualified.
(6) three open interval of interest adopts Ф 215.9mm drill bit, and select high-quality low density drilling fluid to carry out net horizontal section and creep into, finishing drilling well depth 3018m, three carry out under balance pressure drilling prediction scheme before opening.
(7) internal layer tubing string adopt upper solid under completion mode admittedly: production string string 13 adopts the hermetic seal retaining ring pipe of Ф 177.8mm, grade of steel N80, wall thickness 9.19mm, and the well section that hole deviation is greater than 45 degree adopts the hermetic seal retaining ring pipe of Ф 177.8mm, grade of steel L80, wall thickness 9.19mm; Horizontal segment screen casing string 3 adopts the screen casing 31 of Ф 168.3mm, grade of steel L80, wall thickness 10.59mm.
(8) after the finishing drilling of target zone horizontal segment, segmentation circulating fluid, net horizontal section entrance is replaced the drilling fluid into oil-containing 30% below.
(9) be lowered to successively guide shoe 1, well-flushing seal assembly 2, screen casing string 3, screen casing centralizer 4, first and meet that oily swell packers 5, airtight closure diameter changing nipple 6, second are met oily swell packers 7 (7m), hermetic seal retaining ring pipe 133, float collar 8, blind plate 9, hermetic seal retaining ring pipe 132, permanent rise formula external packer of pipe 10, casing stabbing board 11, stage cementing device 12, the hermetic seal retaining ring pipe 131 of pressing are closed in pitching.Wherein second meet oily swell packers 7 times in A position, the bottom of outer protective casing 14, require protective casing 14 and Open-Hole Section respectively to account for the half of its axial length, permanent pressure-expandable external packer of pipe 10 times is above packing casing annulus in net horizontal section entrance, and hermetic seal sleeve pipe carries out hermetic seal detection one by one.
(10) permanent pressure-expandable external packer of pipe 10 is setting, does the test of casing annulus pressure-bearing after setting, guarantees that pit shaft packing is good, prevents under cement paste, leaping up to horizontal segment and polluted reservoir in Process of Cementing.
(11) top well section well cementation, adopts latex anti-gas channeling elastic cement slurry to add high-strength low-density cement mortar equally, guarantees that the sealing of cement sheath and cement grout column pressure are less than permanent pressure-expandable external packer of pipe 10 bearing capacities; Production string string cement slurry water loss amount is controlled at below 50ml, and Free water is zero.
(12) solid completion has been surveyed sound width, is lowered to little drilling tool to pitching and closes the pressure testing of blind plate place, drills pitching and close blind plate after pressure testing is qualified, runs through lower part borehole, for clean drilling fluid, hands over well with diesel oil.
The utility model compared with prior art, has following characteristics and advantage:
(1) completion tubular column adopts multi-sealed measure, the one, adopt hermetic seal retaining ring pipe, the 2nd, production string string is established and is met oily swell packers, the annular space at packing protective casing and bore hole place going out protective casing place, the 3rd, adopt the well cementation of twin-stage variable density, improve casing annulus cementing quality; By multi-sealed guarantee, guarantee sealing and the safety of gas storage finishing drilling pit shaft.
(2) the gentle seal buckle sleeve pipe of screen casing all adopts L8013Cr type stainless steel tube, has higher intensity and stronger erosive wear resistance, the application life that can improve completion tubular column.
(3) screen casing adopts 316LSS or alloy 20 to weave screen pack, and screen pack outside is welded the stainless steel outer protective cover in one deck spiral cloth hole again, to improve sand control strainability and the erosive wear resistance of oil reservoir screen casing, extends its application life.
From the above mentioned, the utility model is for concrete geology design feature and the concrete completion requirement of injection-production well of gas storage, adopt the above well section of double-deck hermetic seal retaining ring pipe shutoff target zone, according to the feature preferred flexible cement of injection-production well alternating pressure, guarantee cement sheath bonding quality, realized the excellent sealing of the above well section of target zone.Adopt the measure of two-stage cementing and variable density well cementing of cement according to sealing well segment length's feature, guaranteed high-quality well cementation.The requirement of adopting according to the long-term note of gas storage adopts meets oily inflatable packer and centralizer reinforcing sieve tube segment, prevents screen casing shake, improves its application life.
The utility model can seal cost-effectively non-target zone well section and guarantee reservoir and ground Zhu Cai network security UNICOM, guarantees underground natural gas storage tank economy, effectively operation; Under the service condition adopt by force in injection, pressure alternately changing, reach 50 years Production Lifes.
The foregoing is only the schematic detailed description of the invention of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the amendment under the prerequisite of design of the present utility model and principle, done, all should belong to the scope of the utility model protection.
Claims (8)
1. a underground natural gas storage tank horizontal well completion tubular pile, is characterized in that: described completion tubular column comprises outer tubing string and is arranged in the internal layer tubing string in outer tubing string; Described internal layer tubing string is made up of with being connected in production string string bottom and being horizontally disposed screen casing string the production string string on top; The bottom of described screen casing string is provided with well-flushing seal assembly and guide shoe, and described screen casing string comprises multistage screen casing and is connected in first between each section of screen casing meets oily swell packers; Described production string string comprises multistage hermetic seal retaining ring pipe and is linked in sequence from top to bottom the stage cementing device between each hermetic seal retaining ring pipe, permanent pressure-expandable external packer of pipe, pitching closing type blind plate and float collar; Between described production string string and screen casing string, be connected with one second and meet oily swell packers; Described the second chance setting position of oily swell packers and the bottom position of outer tubing string are corresponding.
2. underground natural gas storage tank as claimed in claim 1 horizontal well completion tubular pile, is characterized in that: second in described internal layer tubing string met the riding position of oily swell packers, and for its axially upper half is positioned at outer tubing string, second half stretches out outer tubing string.
3. underground natural gas storage tank as claimed in claim 1 horizontal well completion tubular pile, is characterized in that: between described production string string and screen casing string, be also connected with airtight closure diameter changing nipple.
4. underground natural gas storage tank as claimed in claim 1 or 2 horizontal well completion tubular pile, is characterized in that: the described first axial length of meeting oily swell packers is 2m; The described second axial length of meeting oily swell packers is 7m.
5. underground natural gas storage tank as claimed in claim 1 horizontal well completion tubular pile, is characterized in that: described screen casing string is provided with multiple screen casing centralizers; Described production string string is provided with multiple casing stabbing boards.
6. underground natural gas storage tank as claimed in claim 1 horizontal well completion tubular pile, is characterized in that: described outer tubing string is the protective casing being made up of hermetic seal retaining ring pipe.
7. underground natural gas storage tank as claimed in claim 1 horizontal well completion tubular pile, it is characterized in that: in described internal layer tubing string, the bottom of the first paragraph hermetic seal retaining ring pipe being arranged downwards by well head is connected with stage cementing device and permanent pressure-expandable external packer of pipe, permanent pressure-expandable external packer of pipe connects second segment hermetic seal retaining ring pipe again, second segment hermetic seal button casing shoe connects pitching closing type blind plate and float collar, float collar connects the 3rd section of hermetic seal retaining ring pipe again, and the 3rd section of hermetic seal retaining ring pipe met oily swell packers by second and connected screen casing string.
8. the underground natural gas storage tank horizontal well completion tubular pile as described in claim 1 or 6, is characterized in that: the gentle seal buckle sleeve pipe of described screen casing all adopts L8013Cr type stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249549.XU CN203925434U (en) | 2014-05-15 | 2014-05-15 | Underground natural gas storage tank horizontal well completion tubular pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249549.XU CN203925434U (en) | 2014-05-15 | 2014-05-15 | Underground natural gas storage tank horizontal well completion tubular pile |
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| CN203925434U true CN203925434U (en) | 2014-11-05 |
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| CN201420249549.XU Expired - Fee Related CN203925434U (en) | 2014-05-15 | 2014-05-15 | Underground natural gas storage tank horizontal well completion tubular pile |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104895536A (en) * | 2015-05-12 | 2015-09-09 | 中国石油天然气股份有限公司 | Injection-production gas well variable-diameter well completion method and injection-production string |
| CN107060703A (en) * | 2017-06-28 | 2017-08-18 | 中国石油集团渤海钻探工程有限公司 | Multiple expansion sand control screen well completion technique tubular pile in a kind of sleeve pipe |
| CN108049857A (en) * | 2017-11-22 | 2018-05-18 | 中国石油集团长城钻探工程有限公司 | A kind of completion volume increase tubing string and its application method |
| CN108194032A (en) * | 2017-12-11 | 2018-06-22 | 中盐金坛盐化有限责任公司 | Gas storage cavern welded type note adopts casing and installation method |
| CN110924903A (en) * | 2019-12-06 | 2020-03-27 | 中国石油集团渤海钻探工程有限公司 | Selective plugging process pipe column for screen pipe well completion |
| CN109915087B (en) * | 2019-04-01 | 2021-04-30 | 中煤科工集团西安研究院有限公司 | Subsection large-diameter sieve tube in coal mine underground directional long drill hole and running method thereof |
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2014
- 2014-05-15 CN CN201420249549.XU patent/CN203925434U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895536A (en) * | 2015-05-12 | 2015-09-09 | 中国石油天然气股份有限公司 | Injection-production gas well variable-diameter well completion method and injection-production string |
| CN104895536B (en) * | 2015-05-12 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of method and injection-production column jacket for noting gas recovery well reducing completion |
| CN107060703A (en) * | 2017-06-28 | 2017-08-18 | 中国石油集团渤海钻探工程有限公司 | Multiple expansion sand control screen well completion technique tubular pile in a kind of sleeve pipe |
| CN108049857A (en) * | 2017-11-22 | 2018-05-18 | 中国石油集团长城钻探工程有限公司 | A kind of completion volume increase tubing string and its application method |
| CN108194032A (en) * | 2017-12-11 | 2018-06-22 | 中盐金坛盐化有限责任公司 | Gas storage cavern welded type note adopts casing and installation method |
| CN108194032B (en) * | 2017-12-11 | 2020-10-02 | 中盐金坛盐化有限责任公司 | Underground salt cavern gas storage welding type injection-production casing pipe and installation method |
| CN109915087B (en) * | 2019-04-01 | 2021-04-30 | 中煤科工集团西安研究院有限公司 | Subsection large-diameter sieve tube in coal mine underground directional long drill hole and running method thereof |
| CN110924903A (en) * | 2019-12-06 | 2020-03-27 | 中国石油集团渤海钻探工程有限公司 | Selective plugging process pipe column for screen pipe well completion |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |