CN109403902B - A integrated device that is used for casing to decrease well combined material subsidy - Google Patents
A integrated device that is used for casing to decrease well combined material subsidy Download PDFInfo
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- 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
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- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
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Abstract
The invention provides an integrated device for patching a composite material of a casing damage well, which comprises a cable seating tool, a cable heating tool and a hanging releasing tool; the cable seat placing tool comprises a centralizer, an electromagnetic expansion disc, a rigid expansion head, an elastic expansion head and a plug; the hanging releasing tool comprises an upper hanging releasing tool, a middle hanging releasing tool and a lower hanging releasing tool; one end of the upper end hanging releasing tool is connected with the cable through an upper safety joint, and the other end of the upper end hanging releasing tool is connected with the centralizer; one end of the middle-end hanging releasing tool is connected with the centralizer, and the other end of the middle-end hanging releasing tool is connected with the electromagnetic expansion disc; the electromagnetic expansion disc is connected with the upper end of the cable heating tool; the lower end of the cable heating tool is connected with one end of a lower safety joint, the other end of the lower safety joint is connected with the rigid expansion head through a lower end suspension releasing tool, and the rigid expansion head is connected with the plug through an elastic expansion head.
Description
Technical Field
The invention relates to an integrated device for patching a composite material of a casing damage well, and belongs to the technical field of oil and gas field casing damage well treatment.
Background
The casing damage well refers to an oil, gas and water well with damaged casing. Generally, the method is divided into a casing deformation well, a casing fault well, a casing leakage well and the like according to the damaged property of the casing. Casing damage of oil, gas and water wells is an important factor influencing the stable yield of oil fields.
Aiming at a casing leakage-breaking well, the current governing technology mainly comprises water-resisting oil extraction, chemical leakage plugging, casing patching, small casing repairing, sidetracking and the like. The simplest and most economical method is water-proof oil extraction, which is also the main technology at present and mainly comprises the following steps: the mechanical packer is set above a target layer and below a casing damage section, the rubber sleeve is expanded in an annular space in the casing through hydraulic or mechanical action, an oil casing annulus is separated from an oil layer, formation water in the casing damage section cannot enter an oil pipe, and the purpose of recovering normal production through water-resisting oil extraction is achieved. But the defects of the method are that the validity period is short, the repeated setting effect is poor, and the upper formation water is easy to flow back to the oil-gas layer after every time of failure of production separation. The small casing repairing technology mainly aims at the oil and gas wells which cannot be sealed and partially and chemically leak-stopped after the large casing is damaged, and puts the smaller-size steel casing of the whole well again, but the technology has long operation time and high cost. Sidetracking is an important process technology for repairing severely damaged wells, but the well repairing period is long and the cost is high.
The conventional casing patching technology is that after a casing damage well section is shaped or milled, an expansion patching tubular column is lowered to the well section needing patching and repairing by using an oil pipe. And (3) a high-pressure pump is used for pressurizing the interior of the oil pipe on the ground, after the pressure in the launching cavity of the expansion pipe reaches a certain value, the expansion cone pushes the oil pipe to move upwards, when the ascending distance of the expansion cone exceeds the length of the expansion pipe column, the oil sleeve is communicated, the pump pressure is reduced, the expansion pipe completes expansion and is tightly attached to the inner wall of the basic casing pipe, and the anchoring, sealing and repairing requirements are met. And then the oil pipe is taken out, and the expansion pipe column is drilled through and the plug is put down to finish the repair. The technology has the advantages of reliable inner seal, high strength and the like after repair. The expansion patching pipe adopted in the current domestic and foreign engineering and literature has two systems: the expansion pipe is composed of a steel solid expansion pipe and a memory alloy and rubber.
The steel solid expansion pipe mainly comprises a seamless steel pipe and an ERW straight welded pipe, and is mainly made of carbon steel. The technical idea of subsidizing the steel solid expansion pipe is proposed by shell company in 1991, and the development, sale and service of the solid expansion pipe are started by billions of thousands (Enventure) company in 1997. Later, companies such as wedefu, harebilton and beck develop research on the solid expansion tube patching process, and respective products and technical series are formed. At present, the unit for researching and applying the solid expansion pipe in China mainly comprises: medium petroleum exploration general, medium petroleum pipe research institute, Beijing Huading hongji, Shanghai Turp, etc.
Chinese patents CN 205445522U and CN 105604516a propose a technical solution of forming a patch tube by using a memory alloy tube as a patch tube substrate and fixing a rubber seal ring on the outer wall of the alloy tube by using an adhesive. And (3) heating the patch pipe by using the temperature in the well to realize the process of deformation and expansion.
In the aspects of subsidy process and equipment, the patents at home and abroad are as follows: CN.1807830A discloses a method and apparatus for expanding a hydraulic diameter-variable casing, which comprises using a steel pipe having a smaller inner diameter than the original casing, a certain thickness and good plasticity to be lowered into a damaged section of the casing, subjecting the steel pipe to plastic deformation by cold extrusion expansion of a hydraulic expansion cone, attaching the steel pipe to the inner wall of the damaged casing, and tightly bonding the steel pipe to the damaged casing to recover the integrity of the casing, thereby repairing the casing. The main patents in the aspect of construction operation are: CN 102296939A, which discloses an automatic pressure-balancing expansion-fishing integrated expansion pipe tool and a use method thereof; CN 104153735a, which discloses an expansion pipe patching device; and CN 205297425U, which discloses a tension rod type expansion pipe.
At present, the limitations of the conventional casing patch technology methods used in the art are: (1) the method mainly comprises the step of subsidizing the expansion pipe through underground hydraulic pressure, the requirements on the outer well wall strength of the casing pipe and the residual strength and quality of the casing pipe body are high, and otherwise, the casing pipe is easy to deform in the high-stress expansion process of the expansion pipe. (2) Before patching construction, the drifting and pipe scraping operation of multiple pipe columns is needed. (3) In the construction process, in order to prevent the expansion pipe driven by the upward movement of the hydraulic expansion cone from moving upwards, the hydraulic anchoring stop needs to be carried out on the inner wall of the sleeve, and the steel anchor teeth can cause new damage to the sleeve. (4) In the construction process, the hydraulic cold extrusion expansion device of the expansion pipe is complex, the expansion cone is easily clamped in the expansion pipe, the expansion cone cannot be pulled out, and the expansion and propulsion cannot be continued, so that the difficulty of operation treatment is increased. (5) After expansion, a series of pipe column operations such as bottom plugging and the like are required, the working procedures are multiple, and the working period is long. (6) The carbon steel expansion pipe is easy to generate secondary corrosion damage under the environment of underground carbon dioxide, corrosive bacteria or hydrogen sulfide and the like, so that the treatment failure is caused. The corrosion-resistant alloy pipes (titanium-based, nickel-based and the like) are more expensive, have higher requirements for protecting the pipe body in the expansion process, and have more complex construction procedures.
Disclosure of Invention
In order to solve the above drawbacks and deficiencies, it is an object of the present invention to provide an integrated device for composite patching of cased wells. The integrated device for the casing damage well composite material patching provided by the invention is suitable for the internal damage patching treatment of various steel and nonmetal casings in oil extraction, gas production or water injection wells.
In order to achieve the aim, the invention provides an integrated device for repairing a composite material of a casing damage well, which comprises a cable seat placing tool, a cable heating tool and a hanging releasing tool;
the cable seat placing tool comprises a centralizer, an electromagnetic expansion disc, a rigid expansion head, an elastic expansion head and a plug;
the hanging releasing tool comprises an upper hanging releasing tool, a middle hanging releasing tool and a lower hanging releasing tool;
one end of the upper end hanging releasing tool is connected with the cable through an upper safety joint, and the other end of the upper end hanging releasing tool is connected with the centralizer;
one end of the middle-end hanging releasing tool is connected with the centralizer, and the other end of the middle-end hanging releasing tool is connected with the electromagnetic expansion disc;
the electromagnetic expansion disc is connected with the upper end of the cable heating tool through a cable; the lower end of the cable heating tool is connected with one end of a lower safety joint, the other end of the lower safety joint is connected with the rigid expansion head through a lower end suspension releasing tool, and the rigid expansion head is connected with the plug through an elastic expansion head.
In a specific embodiment of the invention, the rigid expansion head of the integrated device for repairing a composite material of a casing damage well can be connected with the elastic expansion head through a mechanical universal joint, and the elastic expansion head and the plug can be connected through threads or welding and the like.
According to a specific embodiment of the invention, the integrated device for patching the composite material of the casing damage well further comprises a ground cable operation vehicle, and the ground cable operation vehicle is connected with a cable.
According to a specific embodiment of the invention, in the integrated device for patching the composite material of the casing damage well, the cable is a special operation cable.
According to a specific embodiment of the invention, in the integrated device for repairing a damaged casing well composite material, the electromagnetic expansion disc and the rigid expansion head are used for fixing the composite material cylinder with the shape memory function in the cable lowering stage.
According to a specific embodiment of the invention, in the integrated device for repairing the composite material of the damaged casing well, the composite material cylinder is a straight cylinder with hollow, round, upper and lower drift diameters and the like.
According to a specific embodiment of the invention, in the integrated device for repairing the composite material of the damaged casing well, the length of the composite material cylinder is 4m-8m longer than the longitudinal length of the perforation or the section to be repaired.
According to the embodiment of the invention, in the integrated device for repairing the composite material of the damaged casing well, the inner diameter of the composite material cylinder is 8mm-50mm smaller than the inner diameter of the casing.
According to a specific embodiment of the invention, in the integrated device for repairing the composite material of the damaged casing well, the material of the composite material cylinder is glass fiber reinforced plastics, carbon fiber reinforced composite materials or shape memory polymer fiber reinforced materials.
Wherein, the glass fiber reinforced plastics, the carbon fiber reinforced composite material or the shape memory polymer fiber reinforced material are all conventional materials, and can be obtained by the conventional preparation method in the field or the commercial products.
According to a specific embodiment of the invention, in the integrated device for casing damage well composite material patch, the cable heating tool comprises a heating resistance wire, a thermocouple and a temperature control switch. When the ground cable is electrified, the resistance wire starts to heat, and when the set temperature is reached, the thermocouple tests feedback, and the temperature control switch cuts off the current.
According to the embodiment of the invention, in the integrated device for patching the composite material of the damaged casing well, the outer diameter of the casing pipe of the damaged casing well is phi 93.9 mm-phi 450 mm.
According to the specific embodiment of the invention, in the integrated device for patching the composite material of the casing damage well, one end of the upper end suspension releasing tool is connected with a cable through the upper safety joint, so that the pulling force is increased to break the casing damage well after faults such as blockage and the like occur underground.
According to a specific embodiment of the invention, in the integrated device for patching the composite material of the damaged casing well, the electromagnetic expansion disc and the rigid expansion head are used for fixing the composite material cylinder in the cable lowering stage.
According to a specific embodiment of the invention, in the integrated device for repairing the composite material of the damaged casing well, the cable seat tool is characterized in that the cable seat tool can be expanded and fixed from the upper end and the lower end of the composite material cylinder.
According to the embodiment of the invention, in the integrated device for patching the composite material of the damaged casing well, the centralizer plays a role in ensuring the overall centering of a tool string, a composite material cylinder and the like. In the cable lowering stage, the electromagnetic expansion disc and the rigid expansion head play a role in fixing the composite material cylinder; once the temperature rises, the composite material cylinder expands and expands in an interference manner by means of the shape memory effect of the composite material cylinder, so that one-time patching is realized; and then, the rigid expansion head, the elastic expansion head, the plug and the like move upwards integrally through the lifting of the cable, so that the secondary expansion patching of the composite material cylinder is realized.
After the operation construction is finished, the ground controls and transmits a rotation signal, and the whole of the hanging releasing tool, the cable seat placing tool, the resistance heating tool and the like are separated from the patching sleeve.
According to an embodiment of the present invention, in the integrated device for patching composite materials of casing damage wells, the surface cable operation vehicle may be a 3000m cable winch which is conventional in the field and is provided with a surface power supply system.
The operating cable used may be an armoured multi-core cable, typically a single core, 7 core or composite copper core. The diameter of the operation cable is phi 2.4 mm-phi 20mm, the maximum power load is 60KW, the tensile strength is not less than 5KN, and the power supply current is generally 0.5-10A.
The invention also provides a self-expansion patching method of the oil well casing, which comprises the following steps:
(1) placing a bridge plug on the cable seat;
(2) scraping the pipe;
(3) connecting a work cable to a tool set, comprising: connecting an operation cable with the upper end of a centralizer through an upper safety joint and an upper end hanging releasing tool, connecting the lower end of the centralizer with the upper end of an electromagnetic expansion disc through a middle end hanging releasing tool, connecting the lower end of the electromagnetic expansion disc with a cable heating tool, connecting the cable heating tool with a rigid expansion head through a lower safety joint and a lower end hanging releasing tool, connecting the rigid expansion head with an elastic expansion head through a mechanical universal joint, and connecting the elastic expansion head with a plug through threads or welding;
fixing the organic composite material patch base cylinder with the shape memory function between the electromagnetic expansion disc and the rigid expansion head;
(4) fixing a wellhead, and connecting the operation cable with a ground cable operation vehicle;
(5) the operation cable drives the tool set and the organic composite material patch base cylinder with the shape memory function to go down the well;
(6) positioning the damaged part of the sleeve, and seating the organic composite material patch base cylinder;
(7) electrifying the ground;
(8) heating the organic composite material subsidy base cylinder to a temperature higher than the shape recovery temperature of the organic composite material subsidy base cylinder, and realizing first interference expansion and expansion of the base cylinder so as to subsidy the base cylinder to the damaged section;
(9) lifting the cable, and moving the tool set upwards integrally, wherein the rigid expansion head, the elastic expansion head and the plug perform secondary expansion on the organic composite material patch base cylinder to expand the base cylinder;
(10) removing the cable and downhole tool string from the well;
(11) pulling out the bridge plug;
(12) and (5) putting into production.
According to the specific embodiment of the invention, the oil well casing self-expansion patching method is mainly characterized in that an organic composite material patching base cylinder with a shape memory function (a composite material cylinder with a shape memory function) is connected with a tool set with functions of underground seating and heating through a special operation cable, the cable is connected with a preset casing damage patching section of the patching base cylinder, the tool set and the like which are put into a well, ground is electrified, the cable transmits current to heat the underground, the shape memory polymer material of the patching base cylinder is heated to recover the designed shape, and the patching base cylinder is anchored and fixed in shape expansion through twice expansion compounding of thermal deformation and mechanical expansion of the tool set brought by lifting the cable.
According to a specific embodiment of the present invention, in the self-expansion patching method of the oil well casing, the cable landing bridge plug comprises: after the operation cable is connected with the cable bridge plug, the cable bridge plug is lowered into a reliable position below the casing damage section in the well, and the bridge plug is driven to seat and seal so as to separate the lower part of the well from the upper casing damage section.
According to a specific embodiment of the present invention, in the self-expansion patching method of the oil well casing, the pipe scraping treatment comprises: connecting the operating oil pipe with a mechanical pipe scraper, or connecting a cable with an electric pipe scraper and then putting the electric pipe scraper into a well, and performing inner surface scraping treatment on a damaged section to be repaired so as to remove attached corrosion products, dirt and oil stains.
According to the specific embodiment of the invention, in the self-expansion patching method of the oil well casing, the composite material patching base cylinder is a straight cylinder with hollow, round, upper and lower equal-diameter.
According to the specific embodiment of the invention, in the self-expansion patching method of the oil well casing, the length of the composite patching base cylinder is 4m-8m longer than the longitudinal length of a perforation or a section to be patched;
preferably 6 m.
In a particular form of the invention, the length of the composite patch base is 6m longer than the longitudinal length of the perforation or section to be repaired, typically 3m above and below each other.
According to the specific embodiment of the invention, in the self-expansion patching method of the oil well casing, the inner diameter of the composite material patching base cylinder is 8mm-50mm smaller than the inner diameter of the casing.
According to the specific embodiment of the invention, in the self-expansion patching method of the oil well casing, the material of the composite material cylinder is glass fiber reinforced plastics, carbon fiber reinforced composites or shape memory polymer fiber reinforced materials.
Wherein, the glass fiber reinforced plastics, the carbon fiber reinforced composite material or the shape memory polymer fiber reinforced material are all conventional materials, and can be obtained by the conventional preparation method in the field or the commercial products.
According to the specific embodiment of the invention, in the self-expansion patching method of the oil well casing, the special composite mode forming comprises the following steps:
after the surface of the conductive fiber reinforced material is dipped or brushed with the shape memory polymer, the obtained complex is fixed and formed in a winding mode, and the organic composite material patch base cylinder with the shape memory function is obtained.
According to the specific embodiment of the invention, in the self-expansion patching method of the oil well casing, the winding mode comprises spiral winding and symmetrical wrapping;
preferably a spiral winding.
According to the embodiment of the invention, in the self-expansion patching method of the oil well casing, the shape recovery temperature of the organic composite material patching base cylinder with the shape memory function is 80-180 ℃.
When the underground temperature is higher than the shape recovery temperature of the organic composite material patch base cylinder with the shape memory function, the composite material patch base cylinder expands and expands under the shape memory effect to realize the interference seal casing damage section.
According to a specific embodiment of the invention, in the self-expansion patching method for the oil well casing, before the bridge plug is removed, the method further comprises a pressure test operation, wherein the pressure test operation specifically comprises the following steps:
and (3) running the operation pipe column, testing the pressure of the patch section, wherein the pressure is 15MPa, and the bridge plug is fished out if the pressure is not reduced after stabilizing the pressure for 30 min.
According to the embodiment of the invention, in the self-expansion patching method step (9) of the oil well casing, the second expansion can enhance the patching effect on the damaged section.
According to the specific embodiment of the invention, in the self-expansion patching method of the oil well casing, the outer diameter of the casing is phi 93.9 mm-phi 450 mm.
According to the specific embodiment of the present invention, the cable heating tool is a conventional device in the art, and comprises an upper cable heating tool and a lower cable heating tool, and specifically comprises a heating resistance wire, a thermocouple, a temperature control switch, and the like.
According to an embodiment of the present invention, in the self-expansion patching method of the oil well casing, the surface cable operation vehicle can be a 3000m cable winch which is conventional in the field and is provided with a surface power supply system.
The operating cable used may be an armoured multi-core cable, typically a single core, 7 core or composite copper core. The diameter of the operation cable is phi 2.4 mm-phi 20mm, the maximum power load is 60KW, the tensile strength is not less than 5KN, and the power supply current is generally 0.5-10A.
The self-expansion patching method of the oil well casing pipe mainly uses an organic composite material patching base cylinder with a shape memory function, and is connected with a tool set with underground seating and heating functions through an operation cable of a ground cable operation vehicle; after the series of underground operation procedures such as underground heating, thermal deformation of the subsidy base cylinder, mechanical expansion of a tool set and the like, the anchoring and shape expansion fixing of the subsidy base cylinder are realized. The method utilizes the shape memory effect of the organic composite material to complete casing damage well patching repair, can complete casing patching operation without means such as simple mechanical anchoring, hydraulic expansion or gunpowder explosion and the like, and has the advantages of simple construction process, convenient operation, good corrosion resistance of patching pipes, safety and reliability.
In a particular embodiment of the invention, the "upper end" refers to the end facing towards the wellhead of the well and the "lower end" refers to the end facing away from the wellhead of the well, i.e. towards the bottom of the well.
The invention has the beneficial effects that:
1. the casing damage well patching method utilizes the shape memory effect of the composite material to realize patching repair of the casing damage well, can realize expansion of the patching pipe through modes of cable heating and the like, can finish casing patching operation without means of hydraulic expansion, gunpowder explosion and the like, and has the advantages of short operation time, simple construction process and convenient operation.
2. The patching pipe is lowered into the patching section through cable operation, a workover unit is not needed, the well occupying period is obviously shortened, the comprehensive cost is lower, and the influence on subsequent production and operation is less.
3. The composite material cylinder has strong corrosion resistance, and is slightly influenced by factors such as temperature, corrosive media and the like after the sleeve is attached, and the service life is long.
Drawings
Fig. 1 is a schematic structural diagram of an integrated device for composite material patching of a casing damage well, provided by embodiment 1 of the invention;
FIG. 2 is a schematic process flow diagram of a specific method for self-expanding patching of an oil well casing provided in example 2 of the present invention;
FIG. 3 is a schematic diagram of a patching process in the self-expansion patching method of the oil well casing provided in the embodiment 2 of the invention;
fig. 4 is a schematic diagram of releasing the downhole tool set after the completion of the construction in the self-expansion patching method of the oil well casing provided in embodiment 2 of the present invention.
The main reference numbers illustrate:
1. a ground cable work vehicle;
2. a cable;
3. an upper safety joint;
4. a centralizer;
5. an electromagnetic expansion disc;
6. a cable heating tool is arranged;
7. a damaged portion of the sleeve;
8. a lower cable heating tool;
9. a lower safety joint;
10. a composite material barrel;
11. a rigid expansion head;
12. an elastic expansion head;
13. and (7) a plug.
Detailed Description
In order to clearly understand the technical features, objects and advantages of the present invention, the following detailed description of the technical solutions of the present invention will be made with reference to the following specific examples, which should not be construed as limiting the implementable scope of the present invention.
Example 1
The embodiment provides an integrated device for patching a composite material of a casing damage well, which is shown in a schematic structural diagram in fig. 1, and as can be seen from fig. 1, the device comprises a cable seat tool, a cable heating tool and a hanging releasing tool;
the cable seat placing tool comprises a centralizer 4, an electromagnetic expansion disc 5, a rigid expansion head 11, an elastic expansion head 12 and a plug 13;
the hanging releasing tool comprises an upper hanging releasing tool, a middle hanging releasing tool and a lower hanging releasing tool;
one end of the upper end hanging releasing tool is connected with the cable 2 through an upper safety joint 3, and the other end of the upper end hanging releasing tool is connected with the centralizer 4;
one end of the middle-end hanging releasing tool is connected with the centralizer 4, and the other end of the middle-end hanging releasing tool is connected with the electromagnetic expansion disc 5;
the electromagnetic expansion disc 5 is connected with the upper end of the cable heating tool through a cable; the lower end of the cable heating tool is connected with one end of a lower safety joint 9, the other end of the lower safety joint is connected with a rigid expansion head 11 through a lower end hanging releasing tool, the rigid expansion head 11 is connected with an elastic expansion head 12 through a mechanical universal joint, and the elastic expansion head 12 is connected with a plug 13 through threads;
in this embodiment, the integrated device further comprises a ground cable operation vehicle 1, wherein the ground cable operation vehicle 1 is connected with a cable 2;
in the present embodiment, the cable 2 is a special operation cable;
in the embodiment, in the cable lowering stage, the electromagnetic expansion disc 5 and the rigid expansion head 11 are used for fixing the composite material barrel 10 with the shape memory function;
in the present embodiment, the composite material cylinder 10 is a straight cylinder with hollow, circular, upper and lower equal diameters;
in the present embodiment, the length of the composite material barrel 10 is 4m to 8m longer than the longitudinal length of the perforation or the section to be repaired;
in this embodiment, the inner diameter of the composite barrel 10 is 8mm to 50mm smaller than the inner diameter of the cannula;
in this embodiment, the composite material cylinder 10 is made of glass fiber reinforced plastic, carbon fiber reinforced composite material or shape memory polymer fiber reinforced material;
in the present embodiment, the cable heating means includes an upper cable heating means 6 and a lower cable heating means 8, specifically consisting of a heating resistance wire, a thermocouple and a temperature controlled switch.
Example 2
The embodiment provides a self-expansion patching method for oil well casings (with the outer diameter of phi 93.9 mm-phi 450mm), which is realized by adopting the integrated device (tool set) for patching composite materials of damaged wells provided in embodiment 1, the specific process flow schematic diagram of the method is shown in fig. 2, and the method comprises the following specific steps as can be seen from fig. 2,
step 101: the method comprises the following steps that after an operation cable is connected with a cable bridge plug, the cable bridge plug is lowered into a reliable position below a casing damage section in a well, and the cable bridge plug is driven to be set to separate the lower part of the well from the upper casing damage section;
step 102: the pipe scraping treatment specifically comprises the steps of connecting an operating oil pipe with a mechanical pipe scraper, or connecting a cable with an electric pipe scraper and then putting the pipe into a well, and carrying out inner surface scraping treatment on a casing damage section to be repaired so as to remove attached corrosion products, dirt and oil stains;
step 103: connecting a work cable to a tool set, comprising: connecting an operation cable with the upper end of a centralizer through an upper safety joint and an upper end hanging releasing tool, connecting the lower end of the centralizer with the upper end of an electromagnetic expansion disc through a middle end hanging releasing tool, connecting the lower end of the electromagnetic expansion disc with a cable heating tool, connecting the cable heating tool with a rigid expansion head through a lower safety joint and a lower end hanging releasing tool, connecting the rigid expansion head with an elastic expansion head through a mechanical universal joint, and connecting the elastic expansion head with a plug through threads;
fixing the organic composite material patch base cylinder with the shape memory function between the electromagnetic expansion disc and the rigid expansion head;
step 104: fixing a wellhead, and connecting the operation cable with a ground cable operation vehicle;
step 105: the operation cable drives the tool set and the organic composite material patch base cylinder with the shape memory function to go down the well;
step 106: positioning a sleeve damage part 7, and seating the organic composite material patch base cylinder;
step 107: electrifying the ground; heating the organic composite material subsidy base cylinder to a temperature higher than the shape recovery temperature of the organic composite material subsidy base cylinder, and realizing first interference expansion and expansion of the base cylinder so as to subsidy the base cylinder to the damaged section;
step 108: lifting the cable, and moving the tool set upwards integrally, wherein the rigid expansion head, the elastic expansion head and the plug perform secondary expansion on the organic composite material patch base cylinder to expand the base cylinder; the schematic diagram of the subsiding process is shown in FIG. 3;
step 109: and (3) taking out the cable and the downhole tool group (as shown in figure 4) from the well, and performing pressure test, wherein the pressure test comprises the following specific steps:
running an operation tubular column, and testing the pressure of the patch section at 15MPa, wherein the pressure is qualified if the pressure is not reduced after the pressure is stabilized for 30 min;
step 110: the bridge plug is removed after the pressure test is qualified; and (5) putting into production.
As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and scope of the present invention. Therefore, such modifications are also all included in the scope of protection of the present invention.
Claims (8)
1. The integrated device for patching the composite material of the casing damage well is characterized by comprising a cable seat placing tool, a cable heating tool and a hanging releasing tool;
the cable seat placing tool comprises a centralizer (4), an electromagnetic expansion disc (5), a rigid expansion head (11), an elastic expansion head (12) and a plug (13);
the hanging releasing tool comprises an upper hanging releasing tool, a middle hanging releasing tool and a lower hanging releasing tool;
one end of the upper end hanging releasing tool is connected with the cable (2) through an upper safety joint (3), and the other end of the upper end hanging releasing tool is connected with the centralizer (4);
one end of the middle-end hanging releasing tool is connected with the centralizer (4), and the other end of the middle-end hanging releasing tool is connected with the electromagnetic expansion disc (5);
the electromagnetic expansion disc (5) is connected with the upper end of the cable heating tool through a cable; the lower end of the cable heating tool is connected with one end of a lower safety joint (9), the other end of the lower safety joint is connected with the rigid expansion head (11) through a lower end hanging releasing tool, and the rigid expansion head (11) is connected with a plug (13) through an elastic expansion head (12);
in the cable lowering stage, the electromagnetic expansion disc (5) and the rigid expansion head (11) are used for fixing the composite material cylinder (10) with the shape memory function;
the composite material cylinder (10) is made of shape memory polymer fiber reinforced materials.
2. The integrated device for casing damage well composite patching according to claim 1, characterized in that it further comprises a surface cable work vehicle (1), said surface cable work vehicle (1) being connected to a cable (2).
3. An integrated device for casing damage well composite patching according to claim 1 or 2, characterized in that the cable (2) is a special service cable.
4. The integrated apparatus for composite patching of casing damage wells according to claim 1, characterized in that the composite cylinder (10) is a straight cylinder with hollow, circular, upper and lower equal diameter.
5. An integrated device for composite patching of casing damage wells according to claim 4, characterized in that the length of the composite cylinder (10) is 4-8 m longer than the longitudinal length of the perforation or section to be repaired.
6. An integrated device for composite patching in a casing damage well according to claim 4, characterized in that the inner diameter of the composite cylinder (10) is 8-50 mm smaller than the inner diameter of the casing.
7. The integrated apparatus for casing damage well composite subsidy of claim 1, wherein the cable heating means comprises a heating resistance wire, a thermocouple and a temperature controlled switch.
8. An integrated device for composite patching in a casing damage well according to claim 1, characterized in that the casing external diameter of the casing damage well is between phi 93.9mm and phi 450 mm.
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| CN201811357519.XA CN109403902B (en) | 2018-11-15 | 2018-11-15 | A integrated device that is used for casing to decrease well combined material subsidy |
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| CN201811357519.XA CN109403902B (en) | 2018-11-15 | 2018-11-15 | A integrated device that is used for casing to decrease well combined material subsidy |
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| CN110359872B (en) * | 2019-06-14 | 2021-07-02 | 中国石油天然气股份有限公司 | Method for recovering composite casing at well bottom after failure |
| CN110578488A (en) * | 2019-10-21 | 2019-12-17 | 潍坊市宇宏石油机械有限公司 | Casing damage well repairing tool and repairing method |
| CN111472708A (en) * | 2020-03-23 | 2020-07-31 | 中国石油天然气股份有限公司 | Casing pipe patching pipe for casing damage well restoration and patching method thereof |
| CN114592816B (en) * | 2020-12-03 | 2023-12-22 | 中国石油天然气股份有限公司 | Composite material repairing method for long section casing damage well |
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| GB8820608D0 (en) * | 1988-08-31 | 1988-09-28 | Shell Int Research | Method for placing body of shape memory within tubing |
| US7533731B2 (en) * | 2006-05-23 | 2009-05-19 | Schlumberger Technology Corporation | Casing apparatus and method for casing or repairing a well, borehole, or conduit |
| CN104831111B (en) * | 2015-05-19 | 2017-11-07 | 无锡源创机械科技有限公司 | A kind of copper-based memory alloy patching tube and preparation method thereof, subsidy method and purposes |
| CN105604516B (en) * | 2015-12-30 | 2018-08-14 | 中国石油天然气股份有限公司 | A kind of oil well casing self-expanding patch device and its subsidy method |
| CN106401501B (en) * | 2016-11-30 | 2017-12-26 | 李党生 | Multi-functional tube rod protection device and its manufacture method |
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