CN112443287B - Low-pressure casing damage well casing patching mechanism and patching method - Google Patents
Low-pressure casing damage well casing patching mechanism and patching method Download PDFInfo
- Publication number
- CN112443287B CN112443287B CN202011313631.0A CN202011313631A CN112443287B CN 112443287 B CN112443287 B CN 112443287B CN 202011313631 A CN202011313631 A CN 202011313631A CN 112443287 B CN112443287 B CN 112443287B
- Authority
- CN
- China
- Prior art keywords
- patching
- casing
- pressure hose
- pressure
- oil pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims abstract description 29
- 230000001070 adhesive effect Effects 0.000 claims abstract description 29
- 239000003129 oil well Substances 0.000 claims description 20
- 229920001971 elastomer Polymers 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 6
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 6
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 4
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 3
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229940018564 m-phenylenediamine Drugs 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920001021 polysulfide Polymers 0.000 claims description 3
- 239000005077 polysulfide Substances 0.000 claims description 3
- 150000008117 polysulfides Polymers 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 230000007306 turnover Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010931 ester hydrolysis Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Earth Drilling (AREA)
- Pipe Accessories (AREA)
Abstract
The invention belongs to the technical field of finishing of metal strips, and particularly relates to a low-pressure casing damage well casing repairing mechanism and a repairing method. The low-pressure casing damage well casing patching mechanism is organically formed by an oil pipe, a turnover tool, a patching high-pressure hose and a soluble ball seat; the overturning and expanding tool is connected to the lower end of the oil pipe and is connected with the patch high-pressure hose in a snap-fit manner; the soluble ball seat is arranged above the damaged position of the sleeve; and adhesive is coated on the inner side wall of the patch high-pressure hose. According to the invention, the adhesive coated on the inner wall of the patch pipe is used, so that the adhesive is prevented from being lost when going down the well, and the patch high-pressure hose and the inner wall of the sleeve pipe are bonded more effectively. The invention has simple construction, can be quickly repaired, and has the characteristics of long acting and sealing. The raw materials used in the invention are easy to obtain, and the preparation process is simple.
Description
Technical Field
The invention belongs to the technical field of finishing of metal strips, and particularly relates to a low-pressure casing damage well casing repairing mechanism and a repairing method.
Background
In oil field production, steel casings of oil wells, gas wells or water injection wells often contain CO due to contact2、H2Oil, gas and water media such as S and/or corrosive bacteria, or corrosive measures such as acidification and blockage removal on a well, which easily cause volume type damage penetrating through the wall thickness of the whole casing after local and uniform corrosion of the inner wall or the outer wall of the casing, and damage the integrity of the shaft casing. Such damage often causes formation water in an external stratum to leak downwards into a production layer of the oil-gas well, so that oil gas cannot be produced, or oil-gas-water media in the well upwards flow into the external stratum, thereby affecting the environment and production safety.
When the casing pipe is damaged in a long section, the common treatment and repair methods are available; 1. and (4) mechanical isolation production, namely, a mechanical water-proof oil extraction tool is adopted to seal the broken section of the sleeve and recover the production of the production zone. 2. The chemical plugging is to use chemical method and chemical plugging agent to plug the damaged part of the casing permanently by chemical action. 3. And (5) patching the solid expansion pipe. 4. And (3) setting a small sleeve, and setting a new sleeve with the inner diameter smaller than that of the original sleeve of the well casing in the well repairing process aiming at the oil well with the large section of casing damage and incapable of being sealed, so that the oil well is recovered. 5. And (4) carrying out windowing sidetracking by utilizing the available casing and the well bore at the upper part, drilling a new well bore track, setting the casing into the well bore, and abandoning the damaged section of the well bore at the lower part.
In the method for repairing steel solid expansion pipe, the main method of the company of Yiwangci in America is that after the expansion pipe is put down to the preset repairing position in the well, the expansion pipe is pushed by liquid pressure through a mechanical expansion device, the expansion pipe is expanded in the process of pushing the expansion cone or the mandrel, the purpose of expanding the pipe diameter is achieved through plastic deformation, and a sealing rubber ring or special sealing threads are suspended together with the casing pipe repairing until the expansion repairing is finished. The expansion process can be hydraulic expansion alone or single pulling expansion, and can also be hydraulic and pulling combined expansion. However, the adoption of the technologies has the problems of short validity period, poor sealing and the like.
Disclosure of Invention
The invention provides a casing patching mechanism and a patching method for a low-pressure casing damage well, and aims to provide a casing patching method which is long-acting, sealed and simple in process construction aiming at a low-pressure and short casing damage section casing damage well and can be used for quickly repairing the casing damage well.
In order to achieve the purpose, the invention adopts the technical scheme that:
a low-pressure casing damage well casing patching mechanism comprises an oil pipe, a turning and expanding tool, a patching high-pressure hose and a soluble ball seat; the lower end of the overturning and expanding tool is arranged in the subsiding high-pressure hose, and the joint of the subsiding high-pressure hose and the overturning and expanding tool is fixed through a fixing piece; the soluble ball seat is arranged above the damaged position of the sleeve; and an adhesive is coated on the inner side wall of the subsidy high-pressure hose.
The inner diameter of the soluble ball seat is more than or equal to 90 mm; the fixing piece adopts an annular buckle.
The oil pipe adopts 2 cun 7 oil pipe.
The patch high-pressure hose is made of thermoplastic polyurethane elastic rubber; the length of the patch high-pressure hose is 8-12m, the diameter of the patch high-pressure hose is 120, and the lower end of the patch high-pressure hose is six equally divided into branches with the length of 20-40 cm.
The thickness of the adhesive coated on the inner side wall of the subsidy high-pressure hose is 3-5 mm.
The adhesive is prepared by mixing 100 parts of E-51 epoxy resin, 15-20 parts of polysulfide rubber, 5-10 parts of dibutyl phthalate, 8-12 parts of m-phenylenediamine, 1-2 parts of diethylenetriamine and 20-40 parts of talcum powder.
The overturning and expanding tool comprises a central rod, four springs and four supporting rods; the upper ends of the four supporting rods are uniformly and movably connected to the peripheral side wall of the lower part of the central rod, and the lower ends of the four supporting rods are respectively connected with the central rod through springs; the lower ends of the four supporting rods are arranged in the patching high-pressure hose; when the spring is bounced open, the two opposite supporting rods form an included angle of 90 degrees, and the maximum outer diameter of the four supporting rods is 123 mm.
A casing patching method of a casing patching mechanism of a low-pressure casing damage well comprises the following steps,
the method comprises the following steps: placing the lower part of a soluble ball seat in the low-voltage casing damage casing patching mechanism on the upper edge of a casing damage section of an oil well by using cable operation;
step two: connecting a patch high-pressure hose, an overturning and expanding tool and an oil pipe, then putting the patch high-pressure hose into a shaft, when the lower end fork of the patch high-pressure hose touches a soluble ball seat and is blocked on the upper end surface of the soluble ball seat by the blocking of the soluble ball seat, turning the inner wall of the patch high-pressure hose outwards and continuously descending under the driving of the oil pipe, when all parts of the inner wall of the patch high-pressure hose are turned out, the downward force applied by the oil pipe is greater than the bearing force of a buckle, disconnecting the connection buckle of the patch high-pressure hose and the overturning and expanding tool, and opening a support rod at the lower end of the overturning and expanding tool;
step three: after waiting for 0.5-1h, starting to lift the oil pipe, and when the oil pipe is lifted, closely adhering the outer wall of the subsidy high-pressure hose and the inner wall of the oil well casing under the action of the support rod at the lower end of the overturning and expanding tool;
step four: after the expansion tool is lifted for 200 meters over the subsidy high-pressure hose 100 and the subsidy high-pressure hose, the oil pipe is lifted out and the well is closed for 6-12 hours.
In the first step, the soluble ball seat is placed at a position 2-3 meters away from the upper edge of the casing damage section of the oil well.
The speed of lifting the oil pipe in the third step is 5.8-6.2 min/m.
Has the advantages that:
(1) according to the invention, the adhesive coated on the inner wall of the patch pipe is used, so that the adhesive is prevented from being lost when the well is lowered, and the patch high-pressure hose is more effectively bonded with the inner wall of the sleeve.
(2) The invention has simple construction, can be quickly repaired, and has the characteristics of long acting and sealing.
(3) The raw materials used in the invention are easy to obtain, and the preparation process is simple.
The foregoing is a summary of the present invention, and the following is a detailed description of the preferred embodiments of the present invention in order to provide a more clear understanding of the technical features of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic structural view of the turning and expanding tool of the invention.
In the figure: 1-an oil pipe; 2-a turning and expanding tool; 3-patching a high-pressure hose; 4-a soluble ball seat; 5-oil well casing damage section; 6-a central rod; 7-a spring; 8-support rod.
The foregoing is a summary of the present invention, and the following is a detailed description of the preferred embodiments of the present invention in order to provide a more clear understanding of the technical features of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 and 2, the low-pressure casing damage well casing patching mechanism comprises an oil pipe 1, an overturning and expanding tool 2, a patching high-pressure hose 3 and a soluble ball seat 4; the overturning and expanding tool 2 is connected to the lower end of the oil pipe 1, and the overturning and expanding tool 2 is connected with the patch high-pressure hose 3 through a buckle; the soluble ball seat 4 is arranged above the damaged position of the casing pipe; and an adhesive is coated on the inner side wall of the subsidy high-pressure hose 3.
When the method is applied specifically, firstly, the upper edge of the damaged section 5 of the oil well casing is placed below the soluble ball seat 4 through cable operation; then, the patching high-pressure hose 3, the overturning and expanding tool 2 and the oil pipe 1 are connected and then are put into a shaft, when the lower end of the patching high-pressure hose 3 touches the soluble ball seat 4 and is blocked on the upper end surface of the soluble ball seat 4 by the blocking of the soluble ball seat 4, the patching high-pressure hose 3 starts to turn outwards on the inner wall and continues to move downwards under the driving of the oil pipe 1, when all parts of the inner wall of the patching high-pressure hose 3 are overturned out, the downward force applied by the oil pipe 1 is greater than the bearing force of the buckles, the connection buckles of the patching high-pressure hose 3 and the overturning and expanding tool 2 are disconnected, and the overturning and expanding tool 2 is opened; after waiting for 0.5-1h, starting to lift the oil pipe 1, and when the oil pipe 1 is lifted, closely adhering the outer wall of the patching high-pressure hose 3 and the inner wall of the oil well casing under the action of the overturning and expanding tool 2; after the expansion tool 2 is lifted over the subsidy high-pressure hose 3100-200 meters, the oil pipe 1 is lifted out and the well is closed for 6-12 hours.
According to the invention, the adhesive coated on the inner wall of the patch pipe is used, so that the adhesive is prevented from being lost when going into the well, and the patch high-pressure hose 3 is more effectively bonded with the inner wall of the casing pipe. The invention has simple construction and achieves the aim of quick repair. The raw materials used in the invention are easy to obtain, and the preparation process is simple.
Example two:
referring to the casing patching mechanism for the low-pressure casing damage well shown in FIG. 1, on the basis of the first embodiment, the inner diameter of the soluble ball seat 4 is more than or equal to 90 mm; the fixing piece adopts an annular buckle.
When specifically using, soluble ball seat 4 adopts this technical scheme, can guarantee to block subsidy 3 lower extremes of high-pressure hose to make subsidy 3 inner walls of high-pressure hose turn up, make subsidy mechanism can implement the subsidy smoothly.
The mounting adopts cyclic annular buckle, can reach its function of effectual implementation, and the cost is lower, and the material obtains the convenience.
Example three:
referring to a casing patching mechanism for a low-pressure casing damage well shown in fig. 1, on the basis of the first embodiment, a 2-inch 7-diameter oil pipe is adopted as the oil pipe 1.
When in actual use, 2 cun 7 oil pipe are oil pipe commonly used in the oil field, and convenient for obtaining materials, need not to prepare other oil pipe during the operation, save the cost.
Example four:
referring to a casing patching mechanism for a low-pressure casing damage well shown in fig. 1, on the basis of the first embodiment, a patching high-pressure hose 3 is made of thermoplastic polyurethane elastic rubber; the length of the patch high-pressure hose 3 is 8-12m, the diameter is 120, and the lower end of the patch high-pressure hose is six equal parts and is provided with a branch with the length of 20-40 cm.
When in actual use, the patching high-pressure hose 3, the expansion tool 2 and the oil pipe 1 are connected and then are put into the shaft, when the lower end of the patching high-pressure hose 3 is in forked contact with the soluble ball seat 4 and is blocked on the upper end surface of the soluble ball seat 4 by the blocking of the soluble ball seat 4, the patching high-pressure hose 3 begins to turn over the inner wall and continues to move downwards under the driving of the oil pipe 1, all parts of the inner wall of the patching high-pressure hose 3 are turned out, the patching high-pressure hose 3 is convenient to be pasted with the inner wall of the casing through the adhesive on the inner wall, the adhesive is prevented from being put into the well and lost, and the patching pipe and the inner wall of the casing are effectively bonded.
The patching high-pressure hose 3 is made of thermoplastic polyurethane elastic rubber, and the characteristics of excellent wear resistance, excellent ozone resistance, high strength, good elasticity, low temperature resistance, good oil resistance, chemical resistance, environmental resistance and polyether ester hydrolysis stability in a humid environment are fully utilized, so that the long-acting property of the patching is ensured.
The patching high-pressure hose 3 adopts the technical scheme that the length is 8-12m, the diameter is 120, and the lower end of the patching high-pressure hose is six equal parts and is provided with a branch with the length of 20-40cm, so that the function of the patching high-pressure hose can be smoothly implemented in the process of patching the sleeve.
Example five:
referring to a low-pressure casing damage well casing patching mechanism shown in the figure 1, on the basis of the first embodiment or the fourth embodiment: the thickness of the adhesive coated on the inner side wall of the patch high-pressure hose 3 is 3-5 mm.
When in actual use, the adhesive thickness smeared on the inner side wall of the patch high-pressure hose 3 is reduced by adopting the technical scheme, and the using amount of the adhesive is reduced on the basis of ensuring the firmness of the adhesion between the patch high-pressure hose 3 and the inner wall of the sleeve.
Example six:
referring to a low-pressure casing damage well casing patching mechanism shown in fig. 1, on the basis of the first embodiment: the adhesive is prepared by mixing 100 parts of E-51 epoxy resin, 15-20 parts of polysulfide rubber, 5-10 parts of dibutyl phthalate, 8-12 parts of m-phenylenediamine, 1-2 parts of diethylenetriamine and 20-40 parts of talcum powder.
When the adhesive is actually used, the technical scheme is adopted, the viscosity of the adhesive can be ensured to be 800-1200mPa & s, and the adhesive does not flow in a patch pipe. The adhesive prepared by the technical scheme has the curing time of 3h at 80 ℃, the bonding strength of more than 15MPa and the tearing strength of 210N/m, and ensures the bonding quality.
Example seven:
referring to fig. 1 and 2, a casing patching mechanism for a low-pressure casing damage well is based on the first embodiment: the turning and expanding tool 2 comprises a central rod 6, four springs 7 and four supporting rods 8; the upper ends of the four supporting rods 8 are uniformly and movably connected to the peripheral side wall of the lower part of the central rod 6, and the lower ends of the four supporting rods 8 are respectively connected with the central rod 6 through springs 7; the lower ends of the four support rods 8 are arranged in the patch high-pressure hose 3; when the spring 7 is bounced open, the two opposite supporting rods 8 form an included angle of 90 degrees, and the maximum outer diameter of the four supporting rods 8 is 123 mm.
In actual use, after all parts of the inner wall of the subsidy high-pressure hose 3 are turned out, the connection buckle of the subsidy high-pressure hose 3 and the turning and expanding tool 2 is disconnected, and the supporting rod 8 at the lower end of the turning and expanding tool 2 is opened; after waiting for 0.5-1h, the oil pipe 1 starts to be lifted, and when the oil pipe 1 is lifted, the outer wall of the patching high-pressure hose 3 is tightly adhered to the inner wall of the oil well casing under the action of the supporting rod 8 at the lower end of the overturning and expanding tool 2.
Example eight:
a casing patching method of a casing patching mechanism of a low-pressure casing damage well comprises the following steps,
the method comprises the following steps: placing a soluble ball seat 4 in the low-pressure casing damage well casing patching mechanism below an upper edge of an oil well casing damage section 5 by using cable operation;
step two: connecting the patching high-pressure hose 3, the overturning and expanding tool 2 and the oil pipe 1, then putting the patching high-pressure hose into a shaft, when the lower end of the patching high-pressure hose 3 is forked to touch the soluble ball seat 4 and be blocked on the upper end surface of the soluble ball seat 4 by the blocking of the soluble ball seat 4, the patching high-pressure hose 3 starts to turn outwards on the inner wall and continues to move downwards under the driving of the oil pipe 1, when all parts of the inner wall of the patching high-pressure hose 3 are overturned out, the downward force applied by the oil pipe 1 is greater than the bearing force of the buckle, the connection buckle of the patching high-pressure hose 3 and the overturning and expanding tool 2 is disconnected, and the supporting rod 8 at the lower end of the overturning and expanding tool 2 is opened;
step three: after waiting for 0.5-1h, starting to lift the oil pipe 1, and when the oil pipe 1 is lifted, closely adhering the outer wall of the patching high-pressure hose 3 and the inner wall of the oil well casing under the action of the supporting rod 8 at the lower end of the overturning and expanding tool 2;
step four: after the expansion tool 2 is lifted for 200 meters over the subsidy high-pressure hose 100 and the well is closed for 6 to 12 hours, the oil pipe is lifted out.
According to the invention, the adhesive coated on the inner wall of the patch high-pressure hose 3 is prevented from being lost when going into the well, so that the patch high-pressure hose 3 is more effectively bonded with the inner wall of the casing. The invention has simple construction, can be quickly repaired, and has the characteristics of long acting and sealing. The raw materials used in the invention are easy to obtain, and the preparation process is simple.
Example nine:
in the method for patching the casing of the low-pressure casing damage well casing patching mechanism, on the basis of the eighth embodiment, in the first step, the soluble ball seat 4 is placed 2-3 meters away from the upper edge of a casing damage section 5 of an oil well.
When in actual use, the soluble ball seat 4 is placed by adopting the technical scheme, so that the patch high-pressure hose 3 can be turned out of the inner wall, and the patch high-pressure hose 3 is guaranteed to be effective to implement within a limited length.
Example ten:
on the basis of the eighth embodiment, the speed of lifting the oil pipe 1 in the third step is 5.8-6.2 min/m.
In actual use, if the lifting speed is too high, the oil pipe is likely to break off, and the tool falls into a well; the lifting is too slow, and the working period is prolonged. The lifting speed adopts the technical scheme, the requirements of underground operation are met, and the smooth and safe operation is ensured.
Example eleven:
the position of the damaged section of the yellow star well is 1205-1210 meters, the daily produced liquid is 4.3 square after the damage, the oil yield is 0 ton, and the water content is 100 percent. The invention is adopted to carry out casing patching operation:
firstly, placing a soluble ball seat 4 with the inner diameter of 90mm at a position 2-3 meters above an oil well casing damage section 5 by using cable operation; then, a 2-inch 7-oil pipe 1 is adopted to connect the overturning and expanding tool 2, and the overturning and expanding tool 2 is connected with the subsidy high-pressure hose 3 through a buckle; coating an adhesive with the length of 8m in a thickness of 3mm in the patch high-pressure hose 3, wherein six equal branches with the length of 20cm are arranged at the front end of the patch high-pressure hose 3; then, the patching high-pressure hose 3 is brought into a shaft through the operation of the oil pipe 1, when the front end fork of the patching high-pressure hose 3 touches the soluble ball seat 4, the patching high-pressure hose 3 starts to turn over the intestinal type operation, namely the inner wall of the patching high-pressure hose 3 turns outwards, the oil pipe continues to move downwards, when the downward force applied by the oil pipe 1 is larger than the bearing force of the buckle after all parts of the inner wall of the patching high-pressure hose 3 turns outwards, the connecting buckle is disconnected, the four supporting rods 8 of the turning and expanding tool 2 are opened, and after 0.5h of waiting, after the patching high-pressure hose 3 is preliminarily bonded with the inner wall of the sleeve, the oil pipe 1 starts to lift up at the lifting speed of 6min/m, and the turning and expanding tool 2 is slowly lifted up to enable the outer wall of the patching high-pressure hose 3 to be tightly adhered with the inner wall of the sleeve of the oil well. And (5) when the tool is lifted for 100 meters above the subsidized high-pressure hose, taking out the oil pipe and closing the well for 6 hours.
After the operation, the daily produced liquid is recovered to be 3.6 prescriptions, the oil yield is 0.8 ton, and the water content is 43.5 percent.
Example twelve:
and the position of the well casing loss section 253 is 263 meters, the daily produced fluid is 6.3 square after casing loss, the oil production is 0 ton, and the water content is 100 percent. Performing casing patching operation:
placing a soluble ball seat 4 with the inner diameter of 100mm at a position 2-3 meters above the oil well casing damage section 5 by using cable operation; connecting a 2-inch 7-inch oil pipe 1 with an overturning and expanding tool 2, wherein the overturning and expanding tool 2 is connected with a patch high-pressure hose 3 through a buckle; smearing an adhesive with the length of 5mm in the interior of the patch high-pressure hose 3, wherein the length of the adhesive is 12m, and six equally-divided branches with the length of 40cm are arranged at the front end of the adhesive; and then, the patching high-pressure hose 3 is brought into a shaft through the operation of the oil pipe 1, when the front end of the patching high-pressure hose 3 touches the soluble ball seat 4, the patching high-pressure hose 3 starts to turn over sausages, the oil pipe 1 continues to move downwards, when all parts of the inner wall of the patching high-pressure hose 3 are turned out, the force applied by the downward movement of the oil pipe 1 is greater than the bearing force of the buckles, the connecting buckles are disconnected, the supporting rod 8 of the overturning and expanding tool 2 is opened, 1h is waited, after the patching high-pressure hose 3 is preliminarily bonded with the inner wall of the casing, the oil pipe 1 starts to be lifted, the lifting speed is 6min/m, and the supporting rod 8 is slowly lifted to enable the outer wall of the patching high-pressure hose 3 to be tightly bonded with the inner wall of the oil well casing. And when the oil pipe 1 is lifted over the subsidized high-pressure hose for more than 200 meters, the oil pipe is lifted out and the well is closed for 6-12 hours.
After the operation, the daily produced liquid is recovered to be 4.5 formula, the oil yield is 0.6 ton, and the water content is 36.4 percent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Thus, while the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a low pressure casing damage well casing subsidy mechanism which characterized in that: comprises an oil pipe (1), a turning and swelling tool (2), a patch high-pressure hose (3) and a soluble ball seat (4); the overturning and expanding tool (2) is connected to the lower end of the oil pipe (1), the lower end of the overturning and expanding tool (2) is arranged in the subsiding high-pressure hose (3), and the joint of the subsiding high-pressure hose (3) and the overturning and expanding tool (2) is fixed through a fixing piece; the soluble ball seat (4) is arranged above the damaged position of the sleeve; the inner side wall of the subsidy high-pressure hose (3) is coated with an adhesive;
when the branch at the lower end of the patching high-pressure hose (3) touches the soluble ball seat (4) and is blocked at the upper end surface of the soluble ball seat (4) by the blocking of the soluble ball seat (4), the patching high-pressure hose (3) begins to turn outwards the inner wall and continues to move downwards under the driving of the oil pipe (1), after all parts of the inner wall of the patching high-pressure hose (3) are turned out, the downward force applied by the oil pipe (1) is greater than the bearing force of the buckle, the patching high-pressure hose (3) is disconnected from the connecting buckle of the overturning and expanding tool (2), and the lower end of the overturning and expanding tool (2) is opened.
2. The low-pressure casing damage well casing patching mechanism of claim 1, wherein: the inner diameter of the soluble ball seat (4) is more than or equal to 90 mm; the fixing piece adopts an annular buckle.
3. The casing patching mechanism for a low-pressure casing damage well of claim 1, wherein: the oil pipe (1) adopts 2-inch 7 oil pipe.
4. The casing patching mechanism for a low-pressure casing damage well of claim 1, wherein: the patch high-pressure hose (3) is made of thermoplastic polyurethane elastic rubber; the length of the patch high-pressure hose (3) is 8-12m, the diameter is 120, and the six equal parts of the lower end of the patch high-pressure hose are provided with 20-40cm long branches.
5. The casing patching mechanism for a low-pressure casing damage well of claim 1, wherein: the thickness of the adhesive smeared on the inner side wall of the subsidy high-pressure hose (3) is 3-5 mm.
6. The casing patching mechanism for a low-pressure casing damage well of claim 1, wherein: the adhesive is prepared by mixing 100 parts of E-51 epoxy resin, 15-20 parts of polysulfide rubber, 5-10 parts of dibutyl phthalate, 8-12 parts of m-phenylenediamine, 1-2 parts of diethylenetriamine and 20-40 parts of talcum powder.
7. The casing patching mechanism for a low-pressure casing damage well of claim 1, wherein: the overturning and expanding tool (2) comprises a central rod (6), four springs (7) and four supporting rods (8); the upper ends of the four supporting rods (8) are uniformly and movably connected to the peripheral side wall of the lower part of the central rod (6), and the lower ends of the four supporting rods (8) are respectively connected with the central rod (6) through springs (7); the lower ends of the four support rods (8) are arranged in the patch high-pressure hose (3); when the spring (7) is bounced open, the two opposite support rods (8) form an included angle of 90 degrees, and the maximum outer diameter of the four support rods (8) is 123 mm.
8. The casing patching method of the low-pressure casing damage well casing patching mechanism according to any one of claims 1-7, comprising the steps of,
the method comprises the following steps: placing a soluble ball seat (4) in the low-voltage casing damage casing patching mechanism below the upper edge of an oil well casing damage section (5) by using cable operation;
step two: connecting a patching high-pressure hose (3), an overturning and expanding tool (2) and an oil pipe (1), then putting the patching high-pressure hose into a shaft, when the lower end of the patching high-pressure hose (3) is forked to touch a soluble ball seat (4) and is blocked on the upper end surface of the soluble ball seat (4) by the blocking of the soluble ball seat (4), turning the inner wall of the patching high-pressure hose (3) outwards and continuously moving downwards under the driving of the oil pipe (1), when all parts of the inner wall of the patching high-pressure hose (3) are overturned out, the downward force applied by the oil pipe (1) is greater than the force borne by a buckle, disconnecting the connection buckle of the patching high-pressure hose (3) and the overturning and expanding tool (2), and opening a support rod (8) at the lower end of the overturning and expanding tool (2);
step three: after waiting for 0.5-1h, starting to lift the oil pipe (1), and when the oil pipe (1) is lifted, closely adhering the outer wall of the subsidy high-pressure hose (3) and the inner wall of the oil well casing under the action of a support rod (8) at the lower end of the overturning and expanding tool (2);
step four: after the expansion tool (2) is lifted for 200 meters over the subsidy high-pressure hose (3), the oil pipe is lifted out and the well is closed for 6-12 hours.
9. The casing patching method of the casing patching mechanism of the low-pressure casing damage well as defined in claim 8, wherein: in the first step, the soluble ball seat (4) is placed at a position 2-3 meters away from the upper edge of the casing damage section (5) of the oil well.
10. The casing patching method of the casing patching mechanism of the low-pressure casing damage well as defined in claim 8, wherein: the speed of the oil lifting pipe in the third step is 5.8-6.2 min/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313631.0A CN112443287B (en) | 2020-11-20 | 2020-11-20 | Low-pressure casing damage well casing patching mechanism and patching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313631.0A CN112443287B (en) | 2020-11-20 | 2020-11-20 | Low-pressure casing damage well casing patching mechanism and patching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112443287A CN112443287A (en) | 2021-03-05 |
| CN112443287B true CN112443287B (en) | 2022-06-03 |
Family
ID=74737112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011313631.0A Active CN112443287B (en) | 2020-11-20 | 2020-11-20 | Low-pressure casing damage well casing patching mechanism and patching method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112443287B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699816A (en) * | 2005-06-20 | 2005-11-23 | 宁克远 | Rubber lining technique for excavation free repair of old pipes |
| CN105443064A (en) * | 2015-12-30 | 2016-03-30 | 中国石油天然气股份有限公司 | Underground controllable self-expansion casing patching pipe |
| CN105905473A (en) * | 2016-04-14 | 2016-08-31 | 深圳市百事达卓越科技股份有限公司 | Non-excavation transforming method for double layer oil tank |
| CN106427105A (en) * | 2016-08-23 | 2017-02-22 | 林永志 | Power plant chimney inner wall anti-corrosion and anti-seepage lining, and method for realizing chimney on-site mounting with vertical overturning method |
| CN106761514A (en) * | 2016-12-15 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of casing damaged well self-expanding rubber patch device and its subsidy method |
| CN210291137U (en) * | 2019-06-27 | 2020-04-10 | 樊三新 | Negative pressure inner-turning lining composite hose anti-corrosion reinforcing pipeline |
| RU2719881C1 (en) * | 2019-05-14 | 2020-04-23 | Публичное акционерное общество «Татнефть» имени В.Д. Шашина | Method for installation of shaped shutter in well and device for its implementation |
| CN111750207A (en) * | 2020-06-17 | 2020-10-09 | 上海懿诚市政工程有限公司 | CIPP non-excavation pipeline repairing method |
| CN111852373A (en) * | 2020-06-24 | 2020-10-30 | 中国石油天然气股份有限公司 | Thermosensitive high-temperature shape memory polymer sleeve patching process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6775894B2 (en) * | 2001-07-11 | 2004-08-17 | Aera Energy, Llc | Casing patching tool |
-
2020
- 2020-11-20 CN CN202011313631.0A patent/CN112443287B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699816A (en) * | 2005-06-20 | 2005-11-23 | 宁克远 | Rubber lining technique for excavation free repair of old pipes |
| CN105443064A (en) * | 2015-12-30 | 2016-03-30 | 中国石油天然气股份有限公司 | Underground controllable self-expansion casing patching pipe |
| CN105905473A (en) * | 2016-04-14 | 2016-08-31 | 深圳市百事达卓越科技股份有限公司 | Non-excavation transforming method for double layer oil tank |
| CN106427105A (en) * | 2016-08-23 | 2017-02-22 | 林永志 | Power plant chimney inner wall anti-corrosion and anti-seepage lining, and method for realizing chimney on-site mounting with vertical overturning method |
| CN106761514A (en) * | 2016-12-15 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of casing damaged well self-expanding rubber patch device and its subsidy method |
| RU2719881C1 (en) * | 2019-05-14 | 2020-04-23 | Публичное акционерное общество «Татнефть» имени В.Д. Шашина | Method for installation of shaped shutter in well and device for its implementation |
| CN210291137U (en) * | 2019-06-27 | 2020-04-10 | 樊三新 | Negative pressure inner-turning lining composite hose anti-corrosion reinforcing pipeline |
| CN111750207A (en) * | 2020-06-17 | 2020-10-09 | 上海懿诚市政工程有限公司 | CIPP non-excavation pipeline repairing method |
| CN111852373A (en) * | 2020-06-24 | 2020-10-30 | 中国石油天然气股份有限公司 | Thermosensitive high-temperature shape memory polymer sleeve patching process |
Non-Patent Citations (1)
| Title |
|---|
| 温度增强型高弹性液体胶塞暂堵剂研发及应用;刘伟等;《钻井液与完井液》;20191130(第06期);第125-131页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112443287A (en) | 2021-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112443287B (en) | Low-pressure casing damage well casing patching mechanism and patching method | |
| CN201396103Y (en) | Packer | |
| CN212054615U (en) | Large-drift-diameter full-soluble shaft isolation bridge plug | |
| CN206000501U (en) | A kind of suspension type self-expanding blocks tubing string | |
| CN211230370U (en) | Sealing rubber sleeve and fishing-free packer | |
| CN205078223U (en) | Highly deviated well packer | |
| CN218759800U (en) | Universal mandrel type hanger sealing device | |
| CN201687435U (en) | Annular relief valve | |
| CN2720104Y (en) | Fully-closed hydraulic packer | |
| CN201705278U (en) | Naked eye self-expansion annular packer | |
| CN101498199B (en) | Controllable liquid injection pipe and controllable liquid injection method convenient for downhole and uplifting | |
| CN205370487U (en) | Casing patching relay formula grout replaces device | |
| CN210948583U (en) | Full-metal double-slip soluble large-drift-diameter bridge plug | |
| CN207879291U (en) | Expand pipe connected pipe column | |
| CN2878868Y (en) | Anti-loosening fastener for socket pipe | |
| CN211474073U (en) | Multifunctional bridge plug made of fully soluble metal | |
| CN107387013B (en) | Multi-ring metal framework sealing anchoring component, patch pipe component and mounting device | |
| CN201358775Y (en) | Controllable liquid-injecting pipe convenient to descending well and lifting | |
| CN2898282Y (en) | Packer with penetrating hole | |
| CN2816342Y (en) | Cement-filling type packer | |
| CN201358747Y (en) | Small diameter hydraulic packer | |
| CN206071522U (en) | Tail pipe blanking plug rupture disk | |
| CN104453763A (en) | Sealing anchoring member for casing patching and mounting device thereof | |
| CN202338216U (en) | High pressure resistant tapping sleeve | |
| CN113123753A (en) | Soluble easy-to-drill open hole packer and using method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |