CN102588727A - Multilayer gas storage well cylinder body for high-pressure fuel gas underground gas storage well and molding method thereof - Google Patents
Multilayer gas storage well cylinder body for high-pressure fuel gas underground gas storage well and molding method thereof Download PDFInfo
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Abstract
The invention belongs to a multilayer gas storage well cylinder body for a high-pressure fuel gas underground gas storage well and a molding method thereof. The gas storage well cylinder body comprises an inner layer gas storage well cylinder body, a cement protection reinforced layer and an outer cylinder body. The molding method comprises the following steps: drilling a basic well; preparing retarding cement slurry and fixing the outer cylinder body; lowering the gas storage cylinder body; filling the cement protection reinforced layer; and molding the multilayer gas storage well cylinder body. In the multilayer gas storage well cylinder body, the cement protection reinforced layer which can be tightly packed on the outer surface of the gas storage cylinder body and fastens the gas storage cylinder body and the outer cylinder body into a whole is additionally arranged on the basis of a traditional two-pipe underground gas storage well, therefore, corrosion to the gas storage cylinder body by underground water can be completely isolated in the use process, the well fixing effect is effectively improved, frequent deformation amplitude of the gas storage cylinder body due to alternating load is greatly reduced, the safety and the reliability of gas storage and operation of the underground gas storage well are ensured, the service life of the gas storage well is prolonged, breakage or explosion accidents of a well cylinder of the gas storage well are prevented in the use process, and the like.
Description
Technical field
The invention belongs to the forming method of underground gas storage well of high-pressure fuel gas with multilayer gas storage well cylindrical shell and this pit shaft body; Particularly a kind of pit shaft body that is used for the fuel under high pressure gas underground gas storage that contains gas receiver layer, cement protection reinforced layer and outer cylinder body protective layer, and the forming method of this pit shaft body; Adopt underground gas storage well of high-pressure fuel gas of the present invention to store high-pressure fuel gas with multilayer gas storage well cylindrical shell; Can guarantee that gas receiver layer outer surface is tightened to one by the even coating of cement and with outer cylinder body; Thereby can be in the intensity that strengthens the gas storage cylindrical shell, effectively avoid the gas storage cylindrical shell by underground water and harmfulness gas attack, guarantee well for storage long-term safety, reliable operation.
Background technique
At present, in CNG (compressed natural gas) supply station and gas peak regulation station, generally adopt well for storage to store high-pressure natural gas.This type of gas storage well depth is generally 50～200m, and the theoretic clearance between the pit shaft and the borehole wall is generally less than 3.0cm, and the basic well perpendicularity that in addition adopts geological drilling to offer is poor, the borehole wall is uneven, and the gas storage pit shaft is again a rigidity; And tradition adopts the gas storage well of single cylinder can not the pit shaft external surface to be wrapped up fully owing to mud in the well cementation process; The structural imperfection on stratum also can cause pouring into improper dehydration of cement slurry and the leakage in the basic well in addition, finally causes the cement layer of parcel pit shaft cavity and slit to occur.In case the cement layer defectiveness of parcel pit shaft, underground water will make pit shaft external surface generation local etching or/and the slit is penetrated into the pit shaft external surface through its cavity.Notification number is that CN2281418y, name are called " well for storage of high pressure gas ", and notification number is that to be called " fixation method of underground gas storage well shaft " and notification number be that the technology that CN1952466A, the patent documentation that is called " underground gas storage well shaft and fixation method thereof " are put down in writing promptly belongs to the gas storage well bore of this type of single cylinder and the fixation method of this type of gas storage well cylindrical shell for CN1384308A, name.Adopt the gas storage well bore of above-mentioned single cylinder; Grouting from bottom to top after no matter adopting the former to be in the milk, still to adopt both improvement of back from the top down; All can not in the well cementation process, make cement slurry wrap up the outer surface of pit shaft body fully; Thereby in use still exist pit shaft that loosening, corrosion be prone to take place, finally cause gas storage well play, rotation up and down, particularly in variation of ambient temperature big or pit shaft take place under the situation of fracture, the pit shaft ground of can popping out when serious; Not only influenced normal use, but also influenced working life, also will cause disadvantages such as potential threat equipment and staff's safety.To the existing disadvantage of above-mentioned technology; At notification number is that the patent documentation that CN200940768Y, name are called " two-tube underground rock gas high-pressure gas storage well " discloses a kind of gas storage well well body of being made up of inside and outside two-layer sleeve pipe, between its inner layer sleeve and the outer layer sleeve by inside and outside well fixed bolt connection; The fixation method of this gas storage well bore is: get out at first over the ground in well (promptly boring basic well), the outer conductor lower going-into-well; Pass through outer duct subsequently to external pressure oiling cementing slurry for well liquid; The oil-well cement slurries along the outer wall of outer sleeve from lower to upper after turbulent flow returns out ground; Cement in the cleaning outer duct descends inner sleeve again, and fixedly the internal and external layer conduit gets final product.Though this technological pit shaft body has adopted inside and outside two-layer sleeve pipe, and fixes through outer layer sleeve and basic well; But owing to still adopt conventional method to fix between outer layer sleeve and the basic well thereby still there is the perishable perforation of long back pipe (tube) body service time in outer layer sleeve, in case the underground water and harmful gas just can be penetrated in the cavity between inner layer sleeve and the outer layer sleeve, directly inner layer sleeve (being the gas storage pit shaft) is worked the mischief of boring a hole; In addition, the internal and external layer conduit adopts detachable fixingly, its sealing effect is also poor, rainwater and surface water also are prone to be seeped in the space between the two sleeve pipe cylindrical shells, directly inner layer sleeve are worked the mischief; And because the constraint that its inner layer sleeve (gas storage cylindrical shell) is in the unsettled cavity that is hung in outer layer sleeve, the tube wall that reaches the inner layer sleeve about 100m does not deeply have any object; Thereby in use the amplitude that rises, contracts with loads change inner layer sleeve (gas storage cylindrical shell) is also bigger; The i.e. suffered alternation load of inner layer sleeve influence that traditional single cylinder gas storage pit shaft is compared in the influence of gas storage cylindrical shell in use is bigger, fatigue ruption also takes place the gas storage cylindrical shell more easily, and particularly the connection screw thread of gas receiver connecting sleeve part lost efficacy, takes place gas leakage in fuel etc. more easily; Though this technology tradition adopts working life of gas storage well of single cylinder longer relatively, but still be difficult to the be up to state standards quality of defined and the requirement of service life; Therefore above-mentioned patented technology still exists well cementation effect and poor reliability, can not isolate the corrosion to the gas storage well cylindrical shell such as underground water fully; The quality of defined and the requirement of service life are difficult to be up to state standards; And be prone to take place fatigue ruption with its inner layer sleeve of load change (gas storage cylindrical shell) in the using process; Thereby the potential safety hazard that fracture or blast take place for gas leakage in fuel, gas storage well cylindrical shell in use still exist to take place in gas storage well bore, and disadvantage such as working life is short.
Summary of the invention
The objective of the invention is the disadvantage to the existence of above-mentioned background technology, a kind of underground gas storage well of high-pressure fuel gas of research and design is with multilayer gas storage well cylindrical shell and forming method thereof; To overcome defective and the potential safety hazard that background technique in use exists; Reach effective raising well cementation effect; Guarantee Security, the reliability of the gas storage and the operation of well for storage; Prolong its working life, prevent that effectively the gas storage well cylindrical shell is in use by the purposes such as generation of fracture of underground water burn into pit shaft or explosive accident.
The solution of multilayer gas storage well cylindrical shell of the present invention is to existing disadvantage in the using process of two-tube underground rock gas high-pressure gas storage well; Between internal layer gas receiver and outer cylinder body, set up cement protection reinforced layer; This protection reinforced layer not only closely wrapped up the gas receiver external surface, but also internal layer gas receiver and outer cylinder body be fastenedly connected be integral, to internal layer gas receiver body play humidification, to reduce in the using process alternation load to the adverse effect of gas storage cylindrical shell; In addition; Because internal layer gas receiver, cement protection reinforced layer and outer cylinder body are fastening all-in-one-pieces; The centre does not exist cavity or space yet; Not only surface water is difficult to immerse, though outer cylinder body since the well cementation defective in using process after this because of underground water and harmful gas to its corrosion cause perforation wait, since the gas receiver external surface also have one deck with its closely cement of parcel protect reinforced layer, thereby still can effectively protect the gas storage cylindrical shell to be without prejudice, to guarantee the working life of high-pressure gas storage well; Not only the gas receiver external surface was closely wrapped up, but also internal layer gas receiver and outer cylinder body was fastenedly connected the all-in-one-piece effect in order to ensure cement protection reinforced layer; The fixation method of multilayer gas storage well cylindrical shell of the present invention is: at first adopt geological drilling to offer basic well; And with the extended slurry for preparing inject in the basic well 40-55% to basic well volume, the outer cylinder body that again bottom is provided with sealing head is down in basic well; When outer cylinder body be lowered into the extended slurry face when following to outer cylinder body built-inly go into mass, to overcome the buoyancy of extended slurry; Sink to position and extended slurry to outer cylinder body and overflow the outer cylinder body upper oral part and end, treat slow setting cement outer cylinder body and basic well are frozen into one after, the taking-up mass; Then the cylindrical shell bottom bulkhead is provided with the grouting process hole and barrel outer surface is interval with the gas storage cylindrical shell of centralizer is lowered in the outer cylinder body; The back employing cylindrical shell lifting clamping plate that put in place grip the gas storage cylindrical shell; Again with grout pipe insert in the gas storage cylindrical shell, the grouting process hole of its lower end and gas storage cylindrical shell bottom is communicated with and start grouting pump from bottom to top, to grout injection between gas storage cylindrical shell and the outer cylinder body;, cement slurry stops perfusion after overflowing ground; Extract grout pipe and the bayonet socket through its lower end then out gas storage cylindrical shell grouting process hole plug is screwed in this auxiliary hole its sealing, extract grout pipe at last out, solidify to cement slurry and form the protection reinforced layer.Can be as requested after the fixing completion of multilayer gas storage well cylindrical shell of the present invention moulding load onto the wellhead assembly of requirement, just can be used for storing high-pressure fuel gas at gas storage well cylindrical shell upper oral part.Thereby multilayer gas storage well cylindrical shell of the present invention comprises the internal layer gas storage cylindrical shell of outer surface belt centralizer and the outer cylinder body that the bottom is provided with sealing head; Key is between internal layer gas storage cylindrical shell and outer cylinder body, also to be provided with the cement protection reinforced layer that internal layer gas receiver external surface is wrapped up fully, on the bottom bulkhead of gas storage cylindrical shell, is provided with grouting process hole and plug thereof, then is provided with sealing head in the outer cylinder body bottom; Internal layer gas storage cylindrical shell and outer cylinder body are fastenedly connected through cement protection reinforced layer and are integral.This multilayer gas storage well cylindrical shell is tightened to one and uses through cementing concrete and (adopting geological drilling to offer) basic well.
It is identical to the distance of outer cylinder body inner bottom surface with gas storage cylindrical shell bottom that the wall thickness of above-mentioned cement protection reinforced layer is 30～50mm, the bottom is thick.
Above-mentioned underground gas storage well of high-pressure fuel gas is with the forming method of multilayer gas storage well cylindrical shell, and its forming method is:
Steps A. bore basic well: at first bore basic well by oil, gas drilling technology and program;
Step B. preparation extended slurry and fixed outer cylinder body: the 40-55% preparation outer cylinder body by basic well volume is connected the fixing extended slurry of using with the basic borehole wall; The weight percentage of cement slurry is: cement: water: filtrate loss reduction additive: retarding agent: water reducing agent=1: 0.6～0.7: 0.012～0.018: 0.0007～0.0010: 0.012～0.018; The back that stirs is injected and the extended slurry for preparing to be injected in the basic well fixation method that descend gas storage well bore to the 40-55% of basic well volume, is more by the numbers down arrived basic well in the outer cylinder body of sealing head the bottom; After outer cylinder body is lowered into below the extended slurry face to outer cylinder body built-inly go into mass, to overcome the buoyancy of extended slurry; Sink to position and extended slurry to outer cylinder body and overflow outer cylinder body upper oral part (ground) and end, treat slow setting cement outer cylinder body and basic well are frozen into one after, the taking-up mass;
Gas storage cylindrical shell under the step C.: the fixation method that still descends gas storage well bore by the numbers is lowered in the outer cylinder body after step B is fixing that the bottom is provided with the grouting process hole and outer surface is provided with the gas storage cylindrical shell of centralizer at interval, when putting in place under the gas storage cylindrical shell after, adopt cylindrical shell to lift clamping plate the gas storage cylindrical shell is gripped;
The moulding of step D. cement injection protection reinforced layer and multilayer gas storage well cylindrical shell: the intubate of will be in the milk is inserted after step C adopts that the hanging clamp plate holder is held in the gas storage cylindrical shell that fixes, the grouting process hole of its lower end bottom the gas storage cylindrical shell is communicated with and screws, and the startup grouting pump, will to be mixed with proportion be 1.6～1.9g/cm
3Cement slurry through the grouting process hole of gas storage cylindrical shell bottom, pour into from bottom to top in the annular space between gas storage cylindrical shell and the outer cylinder body, after cement slurry overflows ground, close grouting pump; After the high pressure joint of opening grouting intubate upper end is then packed the pigging plug in the grouting intubate into, is connected joint; In intubate, pump into immediately clear water with plug to pressing down to remove cement slurry in grouting intubate and the plug position, grouting process hole, when pump pressure is uprushed, to close grouting pump; Treat cement slurry solidify form the protection reinforced layer after, extract grouting intubate and pigging plug thereof out; Utilize grouting intubate lower end thread head that grouting process hole plug is screwed in the grouting process hole, with its sealing again; Promptly get the multilayer gas storage well cylindrical shell of forming by gas storage cylindrical shell, protection reinforced layer and outer cylinder body, again after pressure testing is qualified.
Above-mentioned described in the step B after outer cylinder body is lowered into below the extended slurry face to outer cylinder body built-inly go into mass, its mass is metallic rod or metallic rod+water.And in extended slurry composition described in the step B: filtrate loss reduction additive is carboxymethyl cellulose or sodium polyacrylate, sulfonated-pheno-formoldehyde resin; Said retarding agent is gluconic acid sodium salt or high sugared lignosulfonates, citric acid, and said water reducing agent is naphthalene sulphonate formaldehyde mixture or lignosulfonates, polycarboxylate.And respectively saving between the cylindrical shell in fixed outer cylinder body, outer cylinder body described in the step B adopted welding or bonding, riveted joint, spiral marking connection mode fixed connection.The slow setting time at extended slurry described in step B and the step C was not less than 10 hours.
Multilayer gas storage well cylindrical shell pressure testing after the above is fixing detect qualified after, load onto corresponding wellhead assembly at the upper oral part of this multilayer gas storage well cylindrical shell on demand, promptly can be used for CNG (compressed natural gas) supply station and gas peak regulation station and store high-pressure natural gas.
The present invention is owing to set up cement protection reinforced layer between the internal layer gas receiver of the two-tube underground rock gas high-pressure gas storage well of background technique and outer cylinder body; This protection reinforced layer not only to internal layer gas receiver body play humidification, but also with the gas receiver external surface closely parcel and internal layer gas storage cylindrical shell and outer cylinder body be fastenedly connected be integral; Even not only surface water is difficult to be immersed in gas receiver surface outer cylinder body because the well cementation defective causes perforation etc. because of underground water and harmful gas to its corrosion in using process after this; Because of the gas receiver external surface also has one deck with its cement that closely wraps up protection reinforced layer, thereby still can effectively protect the gas storage cylindrical shell to be without prejudice; Cement protection reinforced layer in order to ensure being set up plays protection and reinforing function to the gas storage cylindrical shell; The present invention is with after fixing in the basic well and with itself and basic well under the outer cylinder body; To insert in the outer cylinder body downwards with the gas storage cylindrical shell in centralizer and grouting process hole again; Through the grouting process hole of gas storage cylindrical shell bottom cement slurry is poured in the annular space between gas storage cylindrical shell and the outer cylinder body from bottom to top then; In addition between two cylindrical shells under the constraint of centralizer its spacing basically identical, thereby can guarantee cement slurry with the gas receiver external surface closely parcel and be fastenedly connected with outer cylinder body be integral, the gas storage cylindrical shell is played protection and reinforing function.Thereby the present invention has and in use can isolate underground water fully the burn into of gas storage cylindrical shell has effectively been improved the well cementation effect; Reduced the amplitude of the periodically deforming (rise, contract) that causes because of stress alternation of gas storage cylindrical shell greatly; Guaranteed Security, the reliability of the gas storage and the operation of well for storage, not only prolonged gas storage well working life, but also prevented that gas storage well bore from use rupturing or the characteristics such as generation of explosive accident.
Description of drawings
Fig. 1. be multilayer gas storage well tube structure schematic representation of the present invention;
Fig. 2. for multilayer gas storage well cylindrical shell of the present invention is connected with wellhead assembly and the user mode schematic representation, figure middle and upper part double dot dash line partly is a wellhead assembly;
Fig. 3. for reaching, underlying outer cylinder body in the inventive method and the embodiment is connected fixedly schematic representation with basic well;
Fig. 4. the fixing and protection reinforced layer moulding schematic flow sheet for gas storage cylindrical shell in the inventive method and the embodiment.
Among the figure: 1, basic well, 2, connect fixed bed, 3-1, outer cylinder body, 3-1.1, outer cylinder body centralizer, 3-1.2, outer cylinder body sealing head; 3-2, protection reinforced layer, 3-3, gas storage cylindrical shell, 3-3.1, gas receiver connecting sleeve, 3-3.2, gas storage cylindrical shell centralizer, 3-3.3, gas storage cylindrical shell end socket; 3-3.4, gas storage cylindrical shell plug, 4, the well head backing plate, 5, cylindrical shell lifting clamping plate, 6, hanger, 7, (counterweight with) metallic rod; 7-1, metallic rod centralizer, 8, grouting intubate supported flange, 9, the grouting intubate, 9-1, pigging plug, 9-2, grouting intubate centralizer; 10, grouting pump, 11-1, pond, 11-2, cement stock tank, 12, wellhead assembly.
Embodiment
Present embodiment uses the rock gas well for storage to use multilayer gas storage well cylindrical shell to be example with CNG gas station and city gas peak regulation station, storage and distribution station: outer cylinder body 3-1 specification is Φ 323.9 * 6mm, and it is Φ 244.48mm (9 that gas storage cylindrical shell 3-3 adopts diameter
5/
8The sleeve pipe of "), effective gas storage part are 25Mpa for 100m, gas storage pressure deeply.The moulding fixation method of this multilayer gas storage well cylindrical shell is:
Steps A. bore basic well 1: at first be Φ 400mm, be not less than the basic well 1 of 105m, the about 15.84m of basic well cavity volume deeply by oil, gas drilling technology and program drill diameter
3
Step B. preparation extended slurry and fixed outer cylinder body 3-1: with label be (approximately must 7.5m after cement 7746Kg, carboxymethyl cellulose 116.2Kg, gluconic acid sodium salt 116.2Kg, naphthalene sulphonate formaldehyde mixture 7Kg and the water 5030Kg mixing and stirring P.042.5R
3Extended slurry), injects in the basic well about 12 hours of the slow setting time of extended slurry that this mode of execution is joined; Descend the fixation method of gas storage well bore immediately that the bottom is following in basic well 1 with the outer cylinder body 3-1 of sealing head more by the numbers; After outer cylinder body 3-1 is lowered into below the extended slurry face; In outer cylinder body 1, inserting external diameter is Φ 177.8mm; Internal diameter be the drill collar (also claiming drilling tool) of Φ 71.44mm as counterweight with metallic rod 7, overcoming the buoyancy of extended slurry, sink to position and extended slurry to outer cylinder body 3-1 and overflow ground and end; This mode of execution respectively saves and adopts welding to be fixed into one, outer cylinder body 3-1 length overall 102m between the outer cylinder body; Treat slow setting cement outer cylinder body 3-1 and basic well 1 are frozen into one after, take out counterweight with drill collar (being metallic rod 7) through suspension hook, for use;
Gas storage cylindrical shell 3-3 under the step C.: the fixation method that still descends gas storage well bore by the numbers is lowered in the outer cylinder body 3-1 after step B is fixing that the bottom is provided with conical bolt hole and the every interval 15m of outer surface is provided with the gas storage cylindrical shell of a centralizer 3-3.2, when gas storage cylindrical shell 3-3 behind 100m, adopt cylindrical shell lifting clamping plate 5 that gas storage cylindrical shell 3-3 is gripped and oral area intubate supported flange 8 supporting wellhead flanges of using of loading onto and be in the milk above that;
The moulding of step D. cement injection protection reinforced layer and multilayer gas storage well cylindrical shell is fixed: the intubate of will be in the milk 9 is inserted in step C adopts the gas storage cylindrical shell 3-3 that lifting clamping plate 5 grip, the grouting process hole of its lower end bottom the gas storage cylindrical shell is communicated with and screw after, startup grouting pump 10, will to be mixed with proportion be 1.8g/cm
3Cement slurry through the grouting process hole of gas storage cylindrical shell 3-3 bottom, pour into from bottom to top in the annular space between gas storage cylindrical shell 3-3 and the outer cylinder body 3-1, after cement slurry overflows ground, close grouting pump 10; After the high pressure joint of opening grouting intubate 9 upper ends is then packed pigging plug 9-1 in the grouting intubate 9 into, is connected joint; In intubate, pump into immediately clear water with pigging plug 9-1 to pressing down to remove cement slurry in grouting intubate 9 and the plug position, grouting process hole, when pump pressure is uprushed, to close grouting pump; Treat cement slurry solidify form protection reinforced layer 3-2 after, the intubate of will being in the milk 9 extracts out together with pigging plug 9-1; Utilize grouting intubate lower end thread head that cock-type tapered thread plug 3-3.4 is screwed in the grouting process hole, with its sealing again; Promptly get the multilayer gas storage well cylindrical shell of forming by gas storage cylindrical shell 3-3, protection reinforced layer 3-2 and outer cylinder body 3-1, again after pressure testing is qualified.
This mode of execution gained multilayer gas storage well cylindrical shell after pressure testing is qualified, load onto wellhead assembly 12 on request and promptly can be used as gas peak regulation station, storage and distribution station and store high-pressure natural gas and use.
Embodiment 2: it is example that present embodiment is adopted one-way valve with the grouting process hole plug 3-3.4 of gas storage cylindrical shell 3-3 bottom, and grout injection all adopts one of claimant of the present invention, is that the disclosed mode of patent document of CN1837672B is carried out at notification number in the setting of its one-way valve and the annular space between gas storage cylindrical shell 3-3 and outer cylinder body 3-1; All the other structures of multilayer gas storage well cylindrical shell are all identical with embodiment 1 with technological method in the present embodiment.
Claims (6)
1. a underground gas storage well of high-pressure fuel gas is with multilayer gas storage well cylindrical shell; Comprise the internal layer gas storage cylindrical shell of outer surface belt centralizer and the outer cylinder body that the bottom is provided with sealing head; It is characterized in that between internal layer gas storage cylindrical shell and outer cylinder body, also being provided with the cement protection reinforced layer that internal layer gas receiver external surface is wrapped up fully, on the bottom bulkhead of gas storage cylindrical shell, be provided with grouting process hole and plug thereof, then be provided with sealing head in the outer cylinder body bottom; Internal layer gas storage cylindrical shell and outer cylinder body are fastenedly connected through cement protection reinforced layer and are integral.
2. press the said underground gas storage well of high-pressure fuel gas of claim 1 with multilayer gas storage well cylindrical shell, it is identical to the distance of outer cylinder body inner bottom surface with gas storage cylindrical shell bottom to it is characterized in that the wall thickness of said cement protection reinforced layer is 30～50mm, the bottom is thick.
3. by the forming method of the said underground gas storage well of high-pressure fuel gas of claim 1 with multilayer gas storage well cylindrical shell, its forming method is:
Steps A. bore basic well: at first bore basic well by oil, gas drilling technology and program;
Step B. preparation extended slurry and fixed outer cylinder body: the 40-55% preparation outer cylinder body by basic well volume is connected the fixing extended slurry of using with the basic borehole wall; The weight percentage of cement slurry is: cement: water: filtrate loss reduction additive: retarding agent: water reducing agent=1: 0.6～0.7: 0.012～0.018: 0.0007～0.0010: 0.012～0.018; The back that stirs is injected and the extended slurry for preparing to be injected in the basic well fixation method that descend gas storage well bore to the 40-55% of basic well volume, is more by the numbers down arrived basic well in the outer cylinder body of sealing head the bottom; After outer cylinder body is lowered into below the extended slurry face to outer cylinder body built-inly go into mass, to overcome the buoyancy of extended slurry; Sink to position and extended slurry to outer cylinder body and overflow ground and end, treat slow setting cement outer cylinder body and basic well are frozen into one after, the taking-up mass;
Gas storage cylindrical shell under the step C.: the fixation method that still descends gas storage well bore by the numbers is lowered in the outer cylinder body after step B is fixing that the bottom is provided with the grouting process hole and outer surface is provided with the gas storage cylindrical shell of centralizer at interval, when putting in place under the gas storage cylindrical shell after, adopt cylindrical shell to lift clamping plate the gas storage cylindrical shell is gripped;
The moulding of step D. cement injection protection reinforced layer and multilayer gas storage well cylindrical shell: the intubate of will be in the milk is inserted after step C adopts that the hanging clamp plate holder is held in the gas storage cylindrical shell that fixes, the grouting process hole of its lower end bottom the gas storage cylindrical shell is communicated with and screws, and the startup grouting pump, will to be mixed with proportion be 1.6～1.9g/cm
3Cement slurry through the grouting process hole of gas storage cylindrical shell bottom, pour into from bottom to top in the annular space between gas storage cylindrical shell and the outer cylinder body, after cement slurry overflows ground, close grouting pump; After the high pressure joint of opening grouting intubate upper end is then packed the pigging plug in the grouting intubate into, is connected joint; In intubate, pump into immediately clear water with plug to pressing down to remove cement slurry in grouting intubate and the plug position, grouting process hole, when pump pressure is uprushed, to close grouting pump; Treat cement slurry solidify form the protection reinforced layer after, extract grouting intubate and pigging plug thereof out; Utilize grouting intubate lower end thread head that grouting process hole plug is screwed in the grouting process hole, with its sealing again; Promptly get the multilayer gas storage well cylindrical shell of forming by gas storage cylindrical shell, protection reinforced layer and outer cylinder body, again after pressure testing is qualified.
4. by the said forming method of stating underground gas storage well of high-pressure fuel gas with multilayer gas storage well cylindrical shell of claim 3; It is characterized in that in extended slurry composition described in the step B: filtrate loss reduction additive is carboxymethyl cellulose or sodium polyacrylate, sulfonated-pheno-formoldehyde resin; Said retarding agent is gluconic acid sodium salt or high sugared lignosulfonates, citric acid, and said water reducing agent is naphthalene sulphonate formaldehyde mixture or lignosulfonates, polycarboxylate; And the slow setting time of said extended slurry was not less than 10 hours.
5. by the said forming method of stating underground gas storage well of high-pressure fuel gas with multilayer gas storage well cylindrical shell of claim 3, it is characterized in that in fixed outer cylinder body described in the step B, its outer cylinder body, respectively saving and adopt welding or bonding, riveted joint, spiral marking connection mode fixed connection between the cylindrical shell.
6. by the said forming method of stating underground gas storage well of high-pressure fuel gas with multilayer gas storage well cylindrical shell of claim 3, it is characterized in that described in the step B after outer cylinder body is lowered into below the extended slurry face to outer cylinder body built-inly go into mass, its mass is metallic rod or metallic rod+water.
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| CN201210056315.9A CN102588727B (en) | 2012-03-02 | 2012-03-02 | Molding method of multilayer gas storage well cylinder body for high-pressure fuel gas underground gas storage well |
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| CN201210056315.9A CN102588727B (en) | 2012-03-02 | 2012-03-02 | Molding method of multilayer gas storage well cylinder body for high-pressure fuel gas underground gas storage well |
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| CN200940768Y (en) * | 2005-11-04 | 2007-08-29 | 仲文旭 | Double pipe underground natural gas high pressure gas storage well |
| CN101215967A (en) * | 2008-01-21 | 2008-07-09 | 四川川油天然气科技发展有限公司 | High pressure underground gas well shaft fixing method |
| CN101403317A (en) * | 2008-11-12 | 2009-04-08 | 天津市特种设备监督检验技术研究院 | Double-wall sleeve suspension type high-pressure gas underground storing well installation method and structure thereof |
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| CN102588727B (en) | 2014-04-16 |
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