CN101403317B - Double-wall sleeve suspension type high-pressure gas underground storing well installation method and structure thereof - Google Patents
Double-wall sleeve suspension type high-pressure gas underground storing well installation method and structure thereof Download PDFInfo
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- CN101403317B CN101403317B CN2008101529623A CN200810152962A CN101403317B CN 101403317 B CN101403317 B CN 101403317B CN 2008101529623 A CN2008101529623 A CN 2008101529623A CN 200810152962 A CN200810152962 A CN 200810152962A CN 101403317 B CN101403317 B CN 101403317B
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Abstract
The invention discloses an installation method of a double-walled sleeve suspended type high pressure gas underground gas storage well, and a structure thereof, wherein, the method comprises the following steps: well drilling is carried out; an outer mineshaft body is welded and sunk into the drilled well, the upmost end of the outer mineshaft body is connected with a lower-side heteromorphic equipment flange with a groove in a welding way; cement is injected to form a well cementation layer and a groundwork layer, and the groundwork layer is pre-embedded with a plurality of anchor bolts; the anchor bolts are connected and fixed with the lower-side heteromorphic equipment flange; an internal mineshaft is installed in the outer mineshaft body; two split heteromorphic equipment flanges are compressed on the upper end face of the upmost section hoop, and then the split heteromorphic equipment flanges are clamped with the lower-side heteromorphic equipment flange by bolts; and nitrogen is introduced between the internal mineshaft and the outer mineshaft body. By adopting the device and the well cementation method, the stored gas can be prevented from leaping to the outside of the well, sinking and leakage, and the gas storage well can bear the corrosion of the outer wall of the mineshaft, thus guaranteeing the axial elongation of the gas storage well when bearing pressure.
Description
Technical field
The present invention relates to high-pressure gas underground storing well installation method and structure thereof.
Background technology
1, well for storage of high pressure gas brief introduction
Well for storage of high pressure gas claims the CNG gas storage well again, the structure of this well is by single wall Φ 177.8mm ~ Φ 244.5mm (TP80CQJ) gas storage well specialized barrel, by flat laddertron screw thread, connect with the low head (forging) and the top end cover of well bore, its well bore 98% part is embedded in underground about 100 meters ~ 200 meters, form the single wall pit shaft formula pressure vessel that stores compressed natural gas, see the oil and gas industry standard SY/T6535-2002 of the People's Republic of China (PRC) " well for storage of high pressure gas ".
Well for storage of high pressure gas design nominal pressure is 25MPa, design temperature: normal temperature, and be decided to be A1 level high-pressure bottle (third class(grade) pressure vessel) by State General Administration for Quality Supervision in 2004.
Well for storage of high pressure gas is the new things of CNG industry, and boring and building the CNG gas storage well also is a new technology.CNG gas storage well station is with using the gas bomb group, long tube CNG bottle, characteristics such as spherical gas-holder is compared, and has simple in structurely, and floor space is little, and it is little invest little (cost is low) generation scattering explosion potential, and safety is good.
The manufacturing process of gas storage well and project organization are by oil drilling technology and oil recovery well casing, add upper end cover and low head transformation.Wherein the pit shaft body is fixing, is with the concrete that oil well cement paste forms pit shaft body and borehole wall formation cementation to be fixed together.The cement sheath that becomes around the pit shaft figure had both played the fixedly effect of pit shaft body, had played corrosion-resisting function again.
The well cementation of traditional petroleum recovering well casing is to look straight from drilling tool to compress into mud.The method that annular space returns out around the well bore is carried out, and says the direct circulation well shaft fixing technology at once.But the structure underside of gas storage well has end socket can not adopt the method to cement the well.
Because end socket is arranged at the bottom, shaft bottom, what most a few days ago gas storage wells adopted is perfusion well cementation method.To grout in the annular space with artificial or submersible pump.The method mud under very little pressure effect can not reach the position of design, forms part or local well cementation, and the job site is verified.
2, the problem that adopts present cementing method to occur
(1) direct circulation well shaft fixing technology
Because cement paste is to reach the bottom by the well inwall, cement paste annular space around the well outer wall returns out, and the shaft bottom structure is the conical ring sealing, can't remove so be detained the cement of inwall, causes 25MPa natural gas sealing effectiveness bad.Facts have proved, adopt the gas storage well of this structure to have gas leakage.100% well cementation, gas storage well is bearing under the effect of 25MPa normal stress, and the elongation of well bore can be broken cement sheath (by calculating the well bore elongation greater than 200mm), or makes on the gas storage well and scurry, and this also is the hidden danger at direct circulation well cementation place.
(2) perfusion well shaft fixing technology
Because the complexity of stratigraphic structure, phreatic effect forms the borehole wall and strides to collapse and often have under the drilling well perturbation action, and mud is impossible pass (or passing) to stride the thing that collapses (section) and arrive design attitude, often can only be in the well head section, or the local part that forms is cemented the well.On the many places gas storage well of Sichuan Province's appearance, scurry, sink, leak gas and also proved this point.
Also shown the existence and the seriousness of the problems referred to above at Sichuan CNG gas storage well safety technics seminar " No. [2005] 03, the clear vapour in river association " file.
In " Chinese gas-fueled vehicles " 9 ~ 10 phases in 2005, also gas storage well well cementation structure is discussed on total the 96th ~ 97 publication.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of double-wall sleeve suspension type high-pressure gas underground storing well installation method and the structure thereof that provide a kind of and prevent to scurry on the gas storage well, sink, leakage, gas storage well artesian well drum outer wall burn into guarantee gas storage well axial elongation amount when pressure-bearing.
A kind of double-wall sleeve suspension type high-pressure gas underground storing well installation method of the present invention, it may further comprise the steps:
(1) drilling well, wherein ground line to the diameter of drilling well between the hardpan is 1.6 ~ 1.8 times of outer shaft wall body diameter; The diameter of the drilling well of remainder is 1.4 times of the stack shells of U-shaped;
(2) welding low head and saves the outer shaft wall body earlier, welds more piece outer shaft wall body successively and sinks in the described drilling well with the outer shaft wall body of formation U-shaped and with it, and described outer shaft wall body topmost is weldingly connected with the lower-side heteromorphic with groove;
(3) make it to form well cementation layer and ground layer at ground surface to cement injection between outer shaft wall body outer wall between the hardpan and the drilling shaft lining, at the pre-buried a plurality of stone bolt of described ground layer;
(4) described a plurality of stone bolt and described lower-side heteromorphic are connected to a fixed;
(5) in the outer shaft wall body of U-shaped successively with the shaft bottom end socket, interior pit shaft, the joint hoop is fastenedly connected into pit shaft body in the pressure-bearing with pressure clamp, when in the end a joint hoop is not installed, on the groove of described lower-side heteromorphic, place gasket seal, refill wellhead assembly so that the lower surface of pit shaft body in described by its joint hoop topmost is suspended in the groove of described lower-side heteromorphic;
(6) two opposite opened abnormity vessel flanges are pressed on the upper surface that described the top joint binds round, then described opposite opened abnormity vessel flange and lower-side heteromorphic are clamped by bolt;
(7) the nitrogen inflation inlet by lower-side heteromorphic feeds the nitrogen that is lower than 0.1Mpa between pit shaft and the outer shaft wall body inwall in described, and the pressure meter detected pressures by installing on the lower-side heteromorphic.
A kind of double-wall sleeve suspension type high-pressure gas underground storing well structure of the present invention, it comprises the wellhead assembly with air inlet port and leakage fluid dram, what link to each other with described wellhead assembly binds round pit shaft in the more piece that is connected by joint each other, on the interior pit shaft of described lowermost end, be connected with the shaft bottom end socket, it also comprises opposite opened abnormity vessel flange, one have groove and its on have the nitrogen inflation inlet, the lower-side heteromorphic of gauge port and threaded connection hole, described opposite opened abnormity vessel flange and lower-side heteromorphic fold stressed joint on the joint hoop of described the top by bolt, the lower surface, between the lower surface of the groove of described lower-side heteromorphic and joint hoop topmost, be provided with gasket seal, the bottom of described lower-side heteromorphic be welded be enclosed within described in the outer shaft wall body that takes the shape of the letter U outside the pit shaft outer wall, described outer shaft wall body is welded into by more piece outer shaft wall body and the outer shaft wall body of lowermost end connects by low head, the described shaft bottom of the distance from bottom of the stack shell of described U-shaped end socket leaves predetermined distance, ground surface to be provided with between the described U-shaped stack shell between the hardpan and the borehole wall be used to cement the well and cement that Ground Treatment is used to form cementing concrete layer and ground layer, be provided with stone bolt at described ground layer, described lower-side heteromorphic links to each other with described stone bolt by described threaded connection hole.
Adopt apparatus of the present invention and cementing method thereof bearing under the pressure of 25Mpa, the gas storage well stack shell does not adopt the well cementation mode, adopts suspension type, and a kind of feasible project organization is provided; Double-wall sleeve formula structure provides elongate space and freely extends when bearing 25MPa pressure, avoids scurrying on the gas storage well emitting well and sinking; Adopt between two walls to be lower than the 0.1MPa nitrogen-sealed, the gas storage well syndeton is in case leak the nitrogen pressure rising, can adopt stringent effort, leak natural gas and can not spread along the stratum, (existing after the expansion of stratum the natural gas case of catching fire) in the neighbourhood also avoids simultaneously the corrosion of gas storage well outside wall surface; The outer wall sleeve pipe of double-walled carries out the part well cementation degree of depth and arrives hardpan greater than water table, adds the fixing of stone bolt, avoids the friction of single wall gas storage well outside wall surface and cementing concrete, causes wall thickness reduction; Underground 100 ~ 200 meters depths, phreatic corrosion can only be worked to sleeve outer wall, does not corrode the gas storage well barrel that bears 25MPa pressure.Saturating as outer wall corrosion after the several years, can be between two layers of walls cement injection again, the well cementation effect fully that reaches continues to use; Nitrogen protection between inside and outside sleeve can make subsurface temperature can not conduct to the gas storage well barrel, because raise 1 ℃ at underground well temperature, pressure may increase tens atmospheric pressures, avoided natural gas because of variations in temperature cause from the supercharging phenomenon, and cause the inefficacy of gas storage well; The special-shaped vessel flange structure of one side opposite opened is connected with special-shaped vessel flange, and the needs of foot bolt contentedly form the clip of gas storage well again and are fixedly clamped, and have solved and have hung pit shaft and basic fixation problem.
Description of drawings
Fig. 1 is the well for storage of high pressure gas structural representation in the existing SY/T 6535-2002 standard;
Fig. 2 is the structural representation of a kind of double-wall sleeve suspension type high-pressure gas underground storing well structure of the present invention;
Fig. 3 is the welding schematic diagram of the U-shaped stack shell of device shown in Figure 2.
The specific embodiment
Below in conjunction with accompanying drawing and instantiation the present invention is done to describe in detail.
Of the present invention a kind of double-wall sleeve suspension type high-pressure gas underground storing well installation method, it may further comprise the steps: (1) drilling well, wherein ground line to the diameter of drilling well between the hardpan is 1.6 ~ 1.8 times of outer shaft wall body diameter; The diameter of the drilling well of remainder is 1.4 times of the stack shells of U-shaped; (2) welding low head and saves the outer shaft wall body earlier, welds more piece outer shaft wall body successively and sinks in the described drilling well with the outer shaft wall body of formation U-shaped and with it, and described outer shaft wall body topmost is weldingly connected with the lower-side heteromorphic with groove; (3) make it to form well cementation layer and ground layer at cement injection between the outer shaft wall body outer wall at ground surface and hardpan place and drilling shaft lining, at the pre-buried a plurality of stone bolt of described ground layer; (4) described a plurality of stone bolt and described lower-side heteromorphic are connected to a fixed; (5) in the outer shaft wall body of U-shaped successively with the shaft bottom end socket, interior pit shaft, the joint hoop is fastenedly connected into pit shaft body in the pressure-bearing with pressure clamp, when in the end a joint hoop is not installed, on the groove of described lower-side heteromorphic, place gasket seal, refill wellhead assembly so that the lower surface of pit shaft body in described by its joint hoop topmost is suspended in the groove of described lower-side heteromorphic; (6) two opposite opened abnormity vessel flanges are pressed on the upper surface that described the top joint binds round, then described opposite opened abnormity vessel flange and lower-side heteromorphic are clamped by bolt; (7) the nitrogen inflation inlet by lower-side heteromorphic feeds the nitrogen that is lower than 0.1Mpa between pit shaft and the outer shaft wall body inwall in described, and the pressure meter detected pressures by installing on the lower-side heteromorphic.
As Fig. 1 is well for storage of high pressure gas structural representation in the existing SY/T 6535-2002 standard.It comprises wellhead assembly 3 with air inlet port 1 and leakage fluid dram 2, that link to each other with described wellhead assembly 3 and each other by pit shaft 5 in joint hoop 4 more pieces that are connected among the figure, and the interior pit shaft 5 of described more piece and described joint hoop 4 are by being threaded.Be connected with shaft bottom end socket 6 on the pit shaft of described lowermost end, cementing concrete 16 is around interior pit shaft 5.
Of the present invention a kind of double-wall sleeve suspension type high-pressure gas underground storing well structure shown in Fig. 2-3, it comprises wellhead assembly 3 with air inlet port 1 and leakage fluid dram 2, that link to each other with described wellhead assembly 3 and each other by pit shaft 5 in joint hoop 4 more pieces that are connected, and the interior pit shaft 5 of described more piece and described joint hoop 4 are by being threaded.On the pit shaft of described lowermost end, be connected with shaft bottom end socket 6, it also comprises opposite opened abnormity vessel flange 7, one have groove and its on have the nitrogen inflation inlet, the lower-side heteromorphic 8 of gauge port and threaded connection hole, described opposite opened abnormity vessel flange 7 and lower-side heteromorphic 8 fold stressed joint on the joint hoop 4 of described the top by bolt, on the lower surface, between the lower surface of the groove of described lower-side heteromorphic 8 and joint hoop topmost, be provided with gasket seal 9, be welded with in the bottom of described lower-side heteromorphic 8 and be enclosed within the outer shaft wall body 10 that takes the shape of the letter U outside the described pit shaft outer wall, described outer shaft wall body 10 is welded into by more piece outer shaft wall body and the outer shaft wall body 10 of lowermost end connects by low head 14.Described outer shaft wall body material can be made by the selection standard helix tube, Φ 325 * 8mm master screw pipe can be chosen according to Φ 177.8mm inner core in space in described between pit shaft outer wall and the described outer shaft wall body inwall, Φ 244mm inner core is chosen Φ 377 * 8mm master screw pipe, Φ 273.05mm inner core is chosen Φ 426 * 8mm master screw pipe and is determined, described master screw pipe can be buied (routine Tianjin Huayou Steel Pipe Co., Ltd) in a plurality of producers such as Tianjin Steel Pipe Corp..The low head 14 and the described shaft bottom end socket 6 of the outer shaft wall body 10 of described U-shaped leave predetermined distance L, and this distance can be pressed formula L (mm)=300mm+1/1000* (well depth) mm calculated length.In use ground surface to be provided with between the described U-shaped outer shaft wall body between the hardpan and the borehole wall be used to cement the well and cement that Ground Treatment is used to form cementing concrete layer and ground layer 13, be provided with stone bolt 11 at described ground layer, described lower-side heteromorphic 8 links to each other with described stone bolt 11.Between the outer shaft wall body inwall of interior pit shaft 5 and U-shaped, be lower than 12 sealings of 0.1MPa nitrogen by the feeding of nitrogen inflation inlet.The borehole wall diameter at cementing concrete layer and ground layer 13 places is greater than the borehole wall diameter at other place.Between interior pit shaft 5 and outer shaft wall body 10 inwalls, can keep at a certain distance away be provided with centralizer 15 with support outer shaft wall body 10 guarantee in the axiality of pit shaft 5 and outer shaft wall body 10.
Described gasket seal preferably SW with outside ring is prolonged life to benefit to use.The outside of the connecting portion of described adjacent outer shaft wall body have bevel for welding so that between the adjacent outer shaft wall body by being weldingly connected and wherein the inboard of a joint pit shaft body connecting portion is provided with projection 17, another corresponding inboard of joint pit shaft body has groove, described projection and described groove mutually snap-fit with the location, thereby guarantee the level that the mouth of pipe group of outer shaft wall body up and down is right and the verticality requirement of adjacent outer shaft wall body.
Drilling well, wherein ground line to the diameter of drilling well between the hardpan is that the diameter of drilling well of 1.6 times of stack shells, the remainder of U-shaped is 1.4 times of the stack shells of U-shaped, stack shell length+20 that drilling depth is U-shaped meter (deepen length and be the borehole wall stride collapse standby); A welding low head and a joint outer shaft wall body weld more piece outer shaft wall body successively and sink in the described drilling well with the stack shell of formation U-shaped and with it earlier, and described stack shell topmost is weldingly connected with the lower-side heteromorphic with groove; Make it to form well cementation layer and ground layer at cement injection between the U-shaped stack shell outer wall at ground surface and hardpan place and drilling shaft lining, at pre-buried four stone bolt of described ground layer; Described four stone bolt and described lower-side heteromorphic are connected to a fixed; In the outer shaft wall body of U-shaped successively with the shaft bottom end socket, interior pit shaft, the joint hoop is fastenedly connected into pit shaft body in the pressure-bearing with pressure clamp, when in the end a joint hoop is not installed, on the groove of described lower-side heteromorphic, place gasket seal, refill wellhead assembly so that the lower surface of pit shaft body in described by its joint hoop topmost is suspended in the groove of described lower-side heteromorphic; Two opposite opened abnormity vessel flanges are pressed on the upper surface that described the top joint binds round, then described opposite opened abnormity vessel flange and lower-side heteromorphic are clamped by bolt; Nitrogen inflation inlet by lower-side heteromorphic feed between the stack shell inwall of described pit shaft and U-shaped be lower than the nitrogen of 0.1Mpa and by lower-side heteromorphic on the pressure meter detected pressures of installing.
Drilling well, wherein ground line to the diameter of drilling well between the hardpan is that the diameter of drilling well of 1.8 times of stack shells, the remainder of U-shaped is 1.4 times of the stack shells of U-shaped, stack shell length+20 that drilling depth is U-shaped meter (deepen length and be the borehole wall stride collapse standby); A welding low head and a joint outer shaft wall body weld more piece outer shaft wall body successively and sink in the described drilling well with the stack shell of formation U-shaped and with it earlier, and described stack shell topmost is weldingly connected with the lower-side heteromorphic with groove; Make it to form well cementation layer and ground layer at cement injection between the U-shaped stack shell outer wall at ground surface and hardpan place and drilling shaft lining, at pre-buried four stone bolt of described ground layer; Described four stone bolt and described lower-side heteromorphic are connected to a fixed; In the outer shaft wall body of U-shaped successively with the shaft bottom end socket, interior pit shaft, the joint hoop is fastenedly connected into pit shaft body in the pressure-bearing with pressure clamp, when in the end a joint hoop is not installed, on the groove of described lower-side heteromorphic, place gasket seal, refill wellhead assembly so that the lower surface of pit shaft body in described by its joint hoop topmost is suspended in the groove of described lower-side heteromorphic; Two opposite opened abnormity vessel flanges are pressed on the upper surface that described the top joint binds round, then described opposite opened abnormity vessel flange and lower-side heteromorphic are clamped by bolt; Nitrogen inflation inlet by lower-side heteromorphic feed between the stack shell inwall of described pit shaft and U-shaped be lower than the nitrogen of 0.1Mpa and by lower-side heteromorphic on the pressure meter detected pressures of installing.
Drilling well, wherein ground line to the diameter of drilling well between the hardpan is that the diameter of drilling well of 1.7 times of stack shells, the remainder of U-shaped is 1.4 times of the stack shells of U-shaped, stack shell length+20 that drilling depth is U-shaped meter (deepen length and be the borehole wall stride collapse standby); A welding low head and a joint outer shaft wall body weld more piece outer shaft wall body successively and sink in the described drilling well with the stack shell of formation U-shaped and with it earlier, and described stack shell topmost is weldingly connected with the lower-side heteromorphic with groove; Make it to form well cementation layer and ground layer at cement injection between the U-shaped stack shell outer wall at ground surface and hardpan place and drilling shaft lining, at pre-buried four stone bolt of described ground layer; Described four stone bolt and described lower-side heteromorphic are connected to a fixed; In the outer shaft wall body of U-shaped successively with the shaft bottom end socket, interior pit shaft, the joint hoop is fastenedly connected into stack shell in the pressure-bearing with pressure clamp, when in the end a joint hoop is not installed, on the groove of described lower-side heteromorphic, place gasket seal, refill wellhead assembly so that the lower surface of pit shaft body in described by its joint hoop topmost is suspended in the groove of described lower-side heteromorphic; Two opposite opened abnormity vessel flanges are pressed on the upper surface that described the top joint binds round, then described opposite opened abnormity vessel flange and lower-side heteromorphic are clamped by bolt; Nitrogen inflation inlet by lower-side heteromorphic feed between the stack shell inwall of described pit shaft and U-shaped be lower than the nitrogen of 0.1Mpa and by lower-side heteromorphic on the pressure meter detected pressures of installing.
Claims (5)
1. double-wall sleeve suspension type high-pressure gas underground storing well installation method is characterized in that it may further comprise the steps:
(1) drilling well, wherein ground line to the diameter of drilling well between the hardpan is 1.6～1.8 times of outer shaft wall body diameter; The diameter of the drilling well of remainder is 1.4 times of the stack shells of U-shaped;
(2) welding low head and saves the outer shaft wall body earlier, welds more piece outer shaft wall body successively and sinks in the described drilling well with the outer shaft wall body of formation U-shaped and with it, and described outer shaft wall body topmost is weldingly connected with the lower-side heteromorphic with groove;
(3) make it to form well cementation layer and ground layer at ground surface to cement injection between outer shaft wall body outer wall between the hardpan and the drilling shaft lining, at the pre-buried a plurality of stone bolt of described ground layer;
(4) described a plurality of stone bolt and described lower-side heteromorphic are connected to a fixed;
(5) in the outer shaft wall body of U-shaped successively with the shaft bottom end socket, interior pit shaft, the joint hoop is fastenedly connected into pit shaft body in the pressure-bearing with pressure clamp, when in the end a joint hoop is not installed, on the groove of described lower-side heteromorphic, place gasket seal, refill wellhead assembly so that the lower surface of pit shaft body in described by its joint hoop topmost is suspended in the groove of described lower-side heteromorphic;
(6) two opposite opened abnormity vessel flanges are pressed on the upper surface that described the top joint binds round, then described opposite opened abnormity vessel flange and lower-side heteromorphic are clamped by bolt;
(7) the nitrogen inflation inlet by lower-side heteromorphic feeds the nitrogen that is lower than 0.1Mpa between pit shaft and the outer shaft wall body inwall in described, and the pressure meter detected pressures by installing on the lower-side heteromorphic.
2. double-wall sleeve suspension type high-pressure gas underground storing well structure that realizes the described method of claim 1, it comprises the wellhead assembly with air inlet port and leakage fluid dram, what link to each other with described wellhead assembly binds round pit shaft in the more piece that is connected by joint each other, on the interior pit shaft of described lowermost end, be connected with the shaft bottom end socket, it is characterized in that: it also comprises opposite opened abnormity vessel flange, one have groove and its on have the nitrogen inflation inlet, the lower-side heteromorphic of gauge port and threaded connection hole, described opposite opened abnormity vessel flange and lower-side heteromorphic fold stressed joint on the joint hoop of described the top by bolt, the lower surface, between the lower surface of the groove of described lower-side heteromorphic and joint hoop topmost, be provided with gasket seal, the bottom of described lower-side heteromorphic be welded be enclosed within described in the outer shaft wall body that takes the shape of the letter U outside the pit shaft outer wall, described outer shaft wall body is welded into by more piece outer shaft wall body and the outer shaft wall body of lowermost end connects by low head, the described shaft bottom of the distance from bottom of the stack shell of described U-shaped end socket leaves predetermined distance, ground surface to be provided with between the described U-shaped stack shell between the hardpan and the borehole wall be used to cement the well and cement that Ground Treatment is used to form cementing concrete layer and ground layer, be provided with stone bolt at described ground layer, described lower-side heteromorphic links to each other with described stone bolt by described threaded connection hole.
3. double-wall sleeve suspension type high-pressure gas underground storing well structure according to claim 2 is characterized in that: be connected with the nitrogen that is lower than 0.1MPa between the outer shaft wall body inwall of pit shaft and U type in described.
4. double-wall sleeve suspension type high-pressure gas underground storing well structure according to claim 2 is characterized in that: described gasket seal is a SW with outside ring.
5. double-wall sleeve suspension type high-pressure gas underground storing well structure according to claim 2, it is characterized in that: the connecting portion of the described adjacent outer shaft wall body outside has bevel for welding each other being weldingly connected and wherein a joint pit shaft body inboard is provided with projection, another joint pit shaft body inboard has groove, described projection and described groove mutually snap-fit to locate.
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| CN2008101529623A CN101403317B (en) | 2008-11-12 | 2008-11-12 | Double-wall sleeve suspension type high-pressure gas underground storing well installation method and structure thereof |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103089306A (en) * | 2011-11-03 | 2013-05-08 | 大港油田集团有限责任公司 | Method for constructing underground gas storage by depleted oil-gas reservoir |
| CN102434135B (en) * | 2011-12-02 | 2014-07-30 | 河南理工大学 | Multi-layer discharge and mining device for multiple seam developed area |
| CN102588727B (en) * | 2012-03-02 | 2014-04-16 | 冉训 | Molding method of multilayer gas storage well cylinder body for high-pressure fuel gas underground gas storage well |
| CN102588728B (en) * | 2012-03-02 | 2015-04-15 | 冉训 | Multilayer gas storage well cylinder body for high-pressure fuel gas underground gas storage well and molding method thereof |
| CN102582999B (en) * | 2012-03-02 | 2015-04-15 | 冉训 | Multilayer fuel gas storage well cylinder used for high-pressure underground fuel gas storage well and molding-fixing method thereof |
| CN104609088B (en) * | 2014-12-23 | 2016-08-17 | 自贡华气科技股份有限公司 | A kind of manufacture method of the well for storage device storing special gas |
| CN105889746B (en) * | 2016-05-27 | 2018-01-05 | 安徽省皖北煤电集团有限责任公司含山恒泰非金属材料分公司 | A kind of method based on Anhydrite Ore goaf natural gas-storing |
| CN107564395B (en) * | 2017-09-26 | 2019-12-10 | 中国石油天然气股份有限公司 | Simulation experiment well |
| CN107829744B (en) * | 2017-09-26 | 2019-12-10 | 中国石油天然气股份有限公司 | construction method of pile foundation type test well |
| CN113701044B (en) * | 2021-08-31 | 2023-03-31 | 江苏省特种设备安全监督检验研究院 | Manufacturing method of nested gas storage well |
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