CN108194045B - Sleeve pipe prosthetic devices - Google Patents
Sleeve pipe prosthetic devices Download PDFInfo
- Publication number
- CN108194045B CN108194045B CN201810085058.9A CN201810085058A CN108194045B CN 108194045 B CN108194045 B CN 108194045B CN 201810085058 A CN201810085058 A CN 201810085058A CN 108194045 B CN108194045 B CN 108194045B
- Authority
- CN
- China
- Prior art keywords
- pipe
- protective sleeve
- fire
- reaction
- packer
- 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
- 230000001681 protective effect Effects 0.000 claims abstract description 100
- 238000006243 chemical reaction Methods 0.000 claims abstract description 94
- 239000003129 oil well Substances 0.000 claims abstract description 45
- 230000009970 fire resistant effect Effects 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 238000005485 electric heating Methods 0.000 claims abstract description 23
- 238000007133 aluminothermic reaction Methods 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 21
- 238000002955 isolation Methods 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 210000002445 nipple Anatomy 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 52
- 239000003832 thermite Substances 0.000 claims description 36
- 230000001939 inductive effect Effects 0.000 claims description 32
- 229910052742 iron Inorganic materials 0.000 claims description 26
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 16
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 15
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 18
- 239000007788 liquid Substances 0.000 description 16
- 239000003921 oil Substances 0.000 description 15
- 238000000227 grinding Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000007790 scraping Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention relates to a casing repairing device. The technical scheme is as follows: a packer is arranged at the bottom of the oil well casing pipe, and isolation protective sand is arranged above the packer; at the oil well sheathed tube inner wall installation oil pipe anchor on the upper portion of keeping apart the protection sand, the lower extreme of center tube passes through the oil pipe anchor fixed with the oil well sheathed tube inner wall, and the top of oil pipe anchor is equipped with metal packer, the top and the well head device of center tube are connected fixedly, connect fire-resistant protective sheath through the pressure balance check valve in the below of righting the nipple joint, the internal aluminothermic reaction raw materials that is equipped with of annular chamber of fire-resistant protective sheath, and fire-resistant protective sheath is at the outer wall of center tube, and the inner chamber erection reaction of center tube induces the tubular column, and: the aluminothermic reaction raw materials of the inner cavity of the fireproof protective sleeve are heated through the electric heating pipe, so that the aluminothermic reaction raw materials are subjected to controllable aluminothermic reaction, the damaged part of the sleeve is blocked and repaired, the problem that the inner diameter of the sleeve of the existing repair technology is different is avoided, and the problem that the existing cement can leak again is also avoided.
Description
Technical Field
The invention relates to a petroleum pipe repairing device and a petroleum pipe repairing method, in particular to a casing pipe repairing device.
Background
In the process of exploiting oil and gas fields, due to the fact that geological conditions are complex, such as inclined wells and horizontal wells, the condition that oil well casings are damaged often occurs. Damage to the well casing can cause the following hazards to oil field development: 1. the production string cannot be normally run into the well; 2. when the damaged part of the casing is positioned at the position of a water layer or a sand layer, a large amount of water or sand can be discharged from the oil well; 3. oil well production increasing measures cannot be carried out; 4. the well blowout outside the casing is easy to cause; 5. causing the well to fail.
For repairing broken casing, slotted casing or hole, the following methods are available: 1. extruding cement paste: when the oil layer pressure is not large and the fracture and the leakage are not serious, the repairing can be carried out by a cement paste squeezing method. The process method comprises the following steps: firstly, a drift diameter of a drift size which is 8-10 mm smaller than the inner diameter of a casing is used, then a suspended plugging device (the name of a tool is called a bridge plug) is arranged at a proper position of a broken opening, a shaft below the broken opening is temporarily sealed off, a certain amount of cement slurry is injected above the bridge plug to be solidified into a cement plug, after the cement plug is solidified, the cement plug in the casing is drilled, the quality of the broken opening of cement sealing is checked through pressure testing, after the sealing quality is confirmed to be qualified, the suspended plugging device (the bridge plug) is drilled, and sand is flushed to the bottom of a well. The casing repaired by the method can bear 40-80 MPa of pressure generally, and the well is protected by a packer under high-pressure construction later, so that the section is prevented from bearing high pressure. 2. A patch method: namely, a layer of thin-wall pipe is adhered to the inner wall of the damaged sleeve pipe so as to achieve the aim of repairing. The process principle is as follows: after a corrugated pipe (thin-wall pipe) is sleeved on a specially-made high-pressure resistant rubber cylinder and is put down to a damaged position of a casing in a well, the pressure is suppressed to expand the rubber cylinder and expand the corrugated pipe, so that the corrugated pipe is tightly attached to the inner wall of the damaged position of the casing, the casing and the corrugated pipe are bonded into a whole by using an adhesive, and after the adhesive is cured, a drilling tool is moved to take out the high-pressure resistant rubber cylinder. The patching process is simple and safe to operate. 3. Replacing the sleeve: when the fracture position is at the upper part of the oil well and the casing above the break opening can be taken out in a reverse buckling mode, the casing above the accident section can be lifted up completely by a reverse buckling method, a new casing is put in again, and the casing is well buckled up tightly. The method has the advantages that the consistency of the inner diameters of the casings is ensured, and downhole tools can pass through smoothly in later operation; the defects are that the screwing degree of the screw thread of the underground casing which is buckled up is not as tight as that of the underground well head, and the cost for replacing the casing is higher and the operation is difficult.
The patching repair method has the following problems: when sand prevention is needed, a sand prevention pipe column needs to be put in; when the stratum needs to be modified and acidified, an acidification pipe column needs to be put in; when the stratum needs to be fractured, the fracturing pipe column is put into the stratum; because the internal diameter of steel pipe is less than the internal diameter of sheathed tube, like this, the diameter and the specification of the instrument of going into all need diminish, cause the liquid volume of injection to diminish, influence the effect of sand control, acidizing and fracturing, in addition, the steel pipe forms a boss shape of intraductal wall of cover, and like this, the condition of blocking appears easily in the tubular column of going into.
The cement paste extruding method has the following problems: when acidizing operation is needed on site, since cement is alkaline, acid liquor reacts with the cement, and the repaired leak leaks can leak out again.
Disclosure of Invention
The invention aims to provide a casing pipe repairing device aiming at the defects in the prior art, which adopts an aluminothermic reaction method to coat the generated iron and aluminum oxide on the damaged part of the casing pipe of the oil well and then grinds the damaged part to repair the casing pipe of the oil well, thereby avoiding the problems of the prior art that the inner diameter is reduced and the casing pipe leaks again.
The invention provides a casing pipe repairing device, which adopts the technical scheme that: the device comprises a first blind plug (2), a first packer (3), isolation protective sand (4), a second blind plug (5), an oil pipe anchor (6), a metal packer (7), a tin protection plug (8), an electric heating pipe (9), thermite reaction raw materials (10), a fire-resistant protective sleeve (13), a pressure balance check valve (14), a centralizing nipple (15), a reaction inducing pipe column (17) and a central pipe (18), wherein the first packer (3) is installed at the bottom of an oil well casing (1), the first blind plug (2) is arranged at the bottom of the first packer (3), and the isolation protective sand (4) is arranged above the first packer (3); the inner wall of an oil well casing (1) on the upper part of the isolation protective sand (4) is provided with an oil pipe anchor (6), the lower end of a central pipe (18) is fixed with the inner wall of the oil well casing (1) through the oil pipe anchor (6), a second blind plug (5) is arranged at the bottom of the central pipe (18), a metal packer (7) is arranged above the oil pipe anchor (6), the top of the central pipe (18) is fixedly connected with a wellhead device (16), the middle part of the central pipe is provided with a centralizing short section (15), a fire-resistant protective sleeve (13) is connected below the centralizing short section (15) through a pressure balance check valve (14), an aluminothermic reaction raw material (10) is arranged in an annular cavity of the fire-resistant protective sleeve (13), the fire-resistant protective sleeve (13) is sleeved on the outer wall of the central pipe (18), the outer wall of the fire-resistant protective sleeve (13) is provided with, the reaction inducing pipe column (17) is installed in the inner cavity of the central pipe (18), the electric heating pipe (9) is arranged at the bottom of the reaction inducing pipe column (17), and the thermite reaction raw materials (10) in the inner cavity of the fireproof protective sleeve (13) are heated through the electric heating pipe (9), so that the thermite reaction raw materials (10) are subjected to chemical reaction, and the damaged part (19) of the sleeve is plugged and repaired.
Preferably, a positioner (11) and a temperature sensor (12) are arranged in the middle of the reaction inducing column (17), and the damaged part (19) of the oil well casing is positioned through the positioner (11); the reaction result of the thermite reaction raw material (10) in the refractory protective sleeve (13) is monitored by a temperature sensor (12).
Preferably, the aluminothermic reaction raw material (10) is prepared by uniformly mixing aluminum powder and ferric oxide according to the volume ratio of 2: 1.
Preferably, the bottom of the fireproof protective sleeve (13) is closed, the top of the fireproof protective sleeve is open and is provided with a pressure balance check valve (14), and the outer wall of the fireproof protective sleeve (13) is provided with a plurality of inclined through holes, so that the outer openings of the through holes correspond to the inner wall of the oil well casing (1); the inner side of the fireproof protective sleeve (13) is in contact with the central pipe (18), and after the electric heating pipe (9) arranged at the bottom of the reaction inducing pipe column (17) is started and heated, heat is directly transmitted to the thermite reaction raw material (10) in the fireproof protective sleeve (13) through the central pipe (18) to induce thermite reaction.
Preferably, the tin protective plug (8) is melted at a high temperature, so that iron and aluminum oxide produced by thermite reaction are released to the pipe wall and the damaged part (19) of the oil well casing (1).
Preferably, the tubing anchor (6) is an L MD tubing anchor.
Preferably, the first packer (3) adopts a 3Y445 packer.
The invention has the beneficial effects that: the method comprises the following steps of (1) separating oil at the lower part from a cavity at the damaged part of a casing by putting a first blind plug, a first packer and isolation protective sand into the casing of the oil well; then the repairing pipe column is put into the vicinity of the damaged part of the casing pipe, then the reaction inducing pipe column is put in, a power switch is started, the electric heating pipe at the bottom of the reaction inducing pipe column heats the fireproof protective sleeve in the repairing pipe column until aluminothermic reaction raw materials in the fireproof protective sleeve generate aluminothermic reaction, molten iron and aluminum oxide generated by the aluminothermic reaction can repair the damaged part of the casing pipe in a leakage repairing way, and the oil well casing pipe is finally repaired by grinding, so that the problem that the inner diameters of the repaired casing pipes are different in the prior art is solved, and the problem that the existing casing pipes can be re-leaked through cement is also solved; the invention utilizes thermite reaction and a method combining grinding and scraping to recover the repaired part of the sleeve to the same diameter requirement of the original sleeve and achieve the performance of the original sleeve.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a thermite reaction raw material and a refractory protective sheath;
FIG. 3 is a schematic diagram of the structure of a reaction-inducing column;
in the upper diagram: the device comprises an oil well casing 1, a first blind plug 2, a first packer 3, isolation protective sand 4, a second blind plug 5, an oil pipe anchor 6, a metal packer 7, a tin protection plug 8, an electric heating pipe 9, thermite reaction raw materials 10, a positioner 11, a temperature sensor 12, a fire-resistant protective sleeve 13, a pressure balance one-way valve 14, a centralizing short section 15, a wellhead device 16, a reaction inducing pipe column 17, a central pipe 18, a damaged part 19, a polygonal shape 9.1, a closed base 13.1, a groove 13.2 and a casing repairing section a-a.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to FIG. 3, in addition, the reaction inducing column 17 of the present invention is provided at the center thereof with a locator 11 for locating a damaged site 19 of an oil well casing by the locator 11 and a temperature sensor 12 for locating the position of the damaged site 19; the reaction result of the thermite reaction raw materials 10 in the fire-resistant protective sleeve 13 is monitored by the temperature sensor 12, and the reaction inducing pipe column 17 is made of heat insulating materials, so that the heat transfer coefficient of the reaction inducing pipe column is small, the heat of the thermite reaction is reduced to be transferred to the inner cavity of the reaction inducing pipe column, and because the inner cavity is provided with an electric lead connected with the electric heating pipe 9 and data wires connected with the temperature sensor and the positioner, the electric lead and the data wires cannot be burnt out due to the heat of the thermite reaction; the electric heating pipe 9 is sleeved outside the bottom of the reaction inducing pipe column 17, the heat insulation and sealing are good, after a power switch is started at a well mouth, the electric heating pipe 9 starts to heat, heat is firstly conducted to the aluminothermic reaction raw material 10 in the fireproof protective sleeve 13 through the outer wall of the central pipe 18 made of metal until the temperature is raised to the temperature, and the aluminum powder and the ferric oxide start to react, because the reaction is an exothermic reaction, the heat sequentially reacts from the lower direction of the fireproof protective sleeve 13 to generate molten iron and molten aluminum oxide, the density of the molten iron is high, the molten iron flows out along a plurality of through holes arranged on the outer wall of the fireproof protective sleeve 13, at the moment, the tin protective plug 8 is melted at high temperature, so that the iron and the aluminum oxide in the liquid can smoothly flow out, and because a metal packer 7 is arranged below the fireproof protective sleeve 13, the iron and the aluminum oxide in the liquid can only flow upwards along, the whole cavity is small, the temperature is high, the aluminum powder and the ferric oxide of the fireproof protective sleeve 13 continuously react, so that the liquid iron and the liquid aluminum oxide can continuously flow upwards until the damaged part of the sleeve is met, the damaged part is filled, the temperature outside the damaged part is low, the liquid iron and the liquid aluminum oxide start to solidify until the damaged part is filled, the liquid iron and the liquid aluminum oxide continuously flow upwards along a gap between the sleeve and the fireproof protective sleeve 13 until the final thermit reaction is finished, and a firm repairing layer is formed by slow cooling; at this time, because the reaction inducing pipe column is still installed at the center of the fireproof protective sleeve 13, the temperature sensor still uploads temperature data to a control room outside the wellhead, the wellhead can start to descend according to the temperature so as to judge that the thermite reaction is finished, the reaction inducing pipe column is lifted up, and then the next grinding and scraping operation is carried out.
The aluminothermic reaction raw material 10 is prepared by uniformly mixing aluminum powder and ferric oxide according to the volume ratio of 2:1, and the quantity of the filled aluminum powder and the filled ferric oxide is determined according to the size of a damaged part measured by a logging detector, so that the requirement of casing pipe repair can be met.
Referring to the attached drawing 2, a closed base 13.1 is arranged at the bottom of the fireproof protective sleeve 13, a groove 13.2 is arranged at the center of the closed base 13.1, the groove 13.2 is an arc-shaped groove and is matched with an electric heating pipe 9 with a polygonal shape 9.1 at the bottom of a reaction inducing pipe column 17, so that the positioning and fixing effects can be achieved, the reaction inducing pipe column 17 is positioned at the center of the closed base 13.1, the synchronous lifting of the surrounding temperature during heating is facilitated, and the influence of different reactions caused by uneven heating on the repair quality of the sleeve is avoided; in addition, the top of the fire-resistant protective sleeve 13 is opened and provided with a pressure balance check valve 14, the outer wall of the fire-resistant protective sleeve 13 is provided with a plurality of inclined through holes, and the outer openings of the through holes correspond to the inner wall of the oil well casing 1; the inner side of the fire-resistant protective sleeve 13 is in contact with the central pipe 18, and after the electric heating pipe 9 arranged at the bottom of the reaction inducing pipe column 17 is started and heated, heat is directly transmitted to the thermite reaction raw material 10 in the fire-resistant protective sleeve 13 through the central pipe 18, so that thermite reaction is induced.
The fire-resistant protective sheath 13 is an annular cylindrical structure, the inner wall of the fire-resistant protective sheath is provided with a fire-resistant material which can bear 2500 ℃ high temperature, for example, a fire brick made of zirconia is adopted, the top of the fire-resistant protective sheath is provided with a pressure balance check valve 14, so that the aluminum powder and the ferric oxide powder at the top are prevented from seriously collapsing in the reaction process, the upper pressure and the lower pressure of the fire-resistant protective sheath 13 are balanced, the one-time rapid reaction of the aluminum powder and the ferric oxide powder is also avoided, the reaction speed is controlled.
The tin protective plug 8 is melted at high temperature, and the tin protective plug 8 is melted at high temperature due to tin, so that iron and aluminum oxide generated by thermite reaction are released to the pipe wall and the damaged part 19 of the oil well casing pipe 1, the casing pipe is repaired after cooling and solidification, and the inner diameters of the casing pipes are the same through grinding and scraping.
In addition, because the thermite reaction of the invention is carried out under a closed condition, the pressure balance check valve 14 is arranged on the top of the refractory protective sleeve 13, the thermite reaction process can be controlled, although the thermite reaction is violent, the thermite reaction is controlled by air inlet, and the thermite reaction of the invention maintains a milder reaction process, and the adopted method is as follows: firstly, the aluminum powder and the ferric oxide powder are added according to the volume ratio of 2:1, and are fluffy, so that the reaction is mild, and the safety is ensured.
The tubing anchor 6 of the present invention was an L MD tubing anchor and the first packer 3 was a 3Y445 packer.
The invention provides a using method of a casing repairing device, which comprises the following steps:
1. firstly, finding a damaged part 19 of an oil well casing 1 through a detecting instrument for logging, putting a first packer 3 into the lower part of the oil well casing for packing, installing a first blind plug 2 to isolate crude oil at the lower part of the casing, and putting isolation protective sand 4 into the upper part of the first packer 3 to form a protective layer;
2. a repairing pipe column is put into the oil well casing 1: a repairing tubular column consisting of a second blind plug 5, an oil pipe anchor 6, a metal packer 7, thermite reaction raw materials 10, a fireproof protective sleeve 13, a pressure balance one-way valve 14, a centralizing short section 15 and a central pipe 18 is put into the oil well casing 1, the whole repairing tubular column is positioned, after the positioning is finished, the seat sealing is carried out, the whole repairing tubular column is lifted for a section of height and then pressed down, the oil pipe anchor 6 can be sealed, and the whole repairing tubular column is supported; continuing pressing to seal the metal packer 7;
3. a reaction inducing pipe column 17 is put into a central pipe 18 in the oil well casing 1, an electric heating pipe 9 at the bottom of the reaction inducing pipe column 17 is positioned at the bottom of a fireproof protective sleeve 13, aluminothermic reaction raw materials 10 are filled in the fireproof protective sleeve 13, the electric heating pipe 9 is started, and the aluminothermic reaction raw materials 10 in the fireproof protective sleeve 13 are heated to a reaction temperature through the outer wall of the central pipe 18 by heat; a locator 11 and a temperature sensor 12 are arranged on the reaction inducing pipe column 17, when the thermite reaction raw material 10 starts to react, because the chemical reaction between the aluminum powder and the ferric oxide is exothermic, the temperature data obtained by the temperature sensor 12 continuously rises, the success of the reaction inducing pipe column 17 can be judged from the well mouth, and the continuous heating is stopped, at the moment, the data of the temperature sensor 12 maintains a stable or slowly rising process, which shows that the aluminum powder and the ferric oxide are continuously reacted, the generated iron and the ferric oxide flow into the gap between the refractory protective sleeve 13 and the casing and the damaged part 19 of the casing through the through hole on the outer side of the refractory protective sleeve 13, and the data fed back by the temperature sensor is reduced until the reaction is finished, and the leakage repairing of the thermite reaction on the periphery of the damaged part of the casing of the oil well is finished;
4. taking out the reaction inducing pipe column 17, putting a detector along the oil well casing, finding out the repairing condition of the oil well casing, rotating the central pipe, separating the upper part of the central pipe from the central pipe at the lower part of the centralizing nipple 15, leaving the centralizing nipple 15, the pressure balance check valve 14, the lower part of the central pipe, the fireproof protective sleeve 13 and iron and aluminum oxide generated after thermite reaction in the inner cavity of the oil well casing, grinding the parts left in the oil well casing through grinding, and then washing the ground remains and the isolation protective sand 4 out of the oil well casing through well washing operation;
5. setting a drift diameter scraping pipe in the oil well casing, enabling the inner diameter of the oil well casing to be the same up and down through scraping, completely recovering to the design requirement of the casing, setting a detector again, detecting the oil well casing again, and finding out the recovery condition of the casing; and finally, taking out the first packer 3 and the first blind plug 2 to finish the casing pipe repairing operation.
It should be noted that: the process of the thermite reaction is as follows:
the electric heating pipe 9 is sleeved outside the bottom of the reaction inducing pipe column 17, the heat insulation and sealing are good, after a power switch is started at a well mouth, the electric heating pipe 9 starts to heat, heat is firstly conducted to the aluminothermic reaction raw material 10 in the fireproof protective sleeve 13 through the outer wall of the central pipe 18 made of metal until the temperature is raised to the temperature, and the aluminum powder and the ferric oxide start to react, because the reaction is an exothermic reaction, the heat sequentially reacts from the lower direction of the fireproof protective sleeve 13 to generate molten iron and molten aluminum oxide, the density of the molten iron is high, the molten iron flows out along a plurality of through holes arranged on the outer wall of the fireproof protective sleeve 13, at the moment, the tin protective plug 8 is melted at high temperature, so that the iron and the aluminum oxide in the liquid can smoothly flow out, and because a metal packer 7 is arranged below the fireproof protective sleeve 13, the iron and the aluminum oxide in the liquid can only flow upwards along, whole cavity is less, and the temperature is higher, and the aluminium powder and the ferric oxide of fire-resistant protective sheath 13 continue to react, so, the iron and the aluminium oxide of liquid can last upward flow, until meetting sheathed tube damaged department, pack damaged department, and the outside temperature of damaged department is lower, just so begin to solidify, fill up to damaged department, the iron and the aluminium oxide of liquid continue upwards to flow along the gap between sleeve pipe and the fire-resistant protective sheath 13, until final thermite reaction finishes, slowly cool off and form firm repair layer.
In addition, the fireproof protective sleeve 13 is of an annular cylindrical structure, the inner wall of the fireproof protective sleeve is made of zirconia, the fireproof brick can bear the high temperature of 2500 ℃, the pressure balance check valve 14 is arranged at the top of the fireproof protective sleeve, the aluminum powder and the ferric oxide powder at the top are prevented from seriously collapsing in the reaction process, the upper pressure and the lower pressure of the fireproof protective sleeve 13 are balanced, the aluminum powder and the ferric oxide powder are prevented from rapidly reacting at one time, the reaction speed is controlled, and the intensity of the reaction is reduced.
In addition, the grinding and skiving of the present invention are prior art and will not be described in detail.
In embodiment 2, a closed base 13.1 is arranged at the bottom of the fireproof protective sleeve 13, a groove 13.2 is arranged at the center of the closed base 13.1, the groove 13.2 is a polygonal groove, and the groove is matched with the electric heating tube 9 with a polygonal shape at the bottom of the reaction inducing pipe column 17, so that the positioning and fixing effects can be achieved; in addition, the open-top of fire-resistant protective sheath 13 just has installed pressure balance check valve 14, be equipped with the through-hole of a plurality of slopes on the different level of outer wall of fire-resistant protective sheath 13 respectively, make the outer mouth of different level's through-hole corresponding with the inner wall of oil well casing 1, be equipped with the multiunit through-hole of different level, its advantage that exists is: in the 10 reaction processes of aluminothermic reaction raw materials in fire-resistant protective sheath 13, the through-hole that the bottom can be followed to the iron and the aluminium oxide of the liquid that the reaction of lower part produced flows, the iron and the aluminium oxide of the liquid that the middle part reaction produced can flow along the through-hole at middle part, the iron and the aluminium oxide of the liquid that the upper portion reaction produced can flow along the through-hole on upper portion, guarantee mainly that the iron and the whole outflow that the aluminium oxide can be smooth in the fire-resistant protective sheath 13, thereby can fill gap and damaged department between fire-resistant protective sheath 13 and the sleeve pipe.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a sleeve pipe prosthetic devices which characterized by: the device comprises a first blind plug (2), a first packer (3), isolation protective sand (4), a second blind plug (5), an oil pipe anchor (6), a metal packer (7), a tin protection plug (8), an electric heating pipe (9), thermite reaction raw materials (10), a fire-resistant protective sleeve (13), a pressure balance check valve (14), a centralizing nipple (15), a reaction inducing pipe column (17) and a central pipe (18), wherein the first packer (3) is installed at the bottom of an oil well casing (1), the first blind plug (2) is arranged at the bottom of the first packer (3), and the isolation protective sand (4) is arranged above the first packer (3); the inner wall of an oil well casing (1) on the upper part of the isolation protective sand (4) is provided with an oil pipe anchor (6), the lower end of a central pipe (18) is fixed with the inner wall of the oil well casing (1) through the oil pipe anchor (6), a second blind plug (5) is arranged at the bottom of the central pipe (18), a metal packer (7) is arranged above the oil pipe anchor (6), the top of the central pipe (18) is fixedly connected with a wellhead device (16), the middle part of the central pipe is provided with a centralizing short section (15), a fire-resistant protective sleeve (13) is connected below the centralizing short section (15) through a pressure balance check valve (14), an aluminothermic reaction raw material (10) is arranged in an annular cavity of the fire-resistant protective sleeve (13), the fire-resistant protective sleeve (13) is sleeved on the outer wall of the central pipe (18), the outer wall of the fire-resistant protective sleeve (13) is provided with, a reaction inducing pipe column (17) is installed in the inner cavity of the central pipe (18), an electric heating pipe (9) is arranged at the bottom of the reaction inducing pipe column (17), and the thermite reaction raw materials (10) in the inner cavity of the fireproof protective sleeve (13) are heated through the electric heating pipe (9), so that the thermite reaction raw materials (10) are subjected to chemical reaction, and a damaged part (19) of the sleeve is plugged and repaired;
the bottom of the fire-resistant protective sleeve (13) is closed, the top of the fire-resistant protective sleeve is open and is provided with a pressure balance check valve (14), and the outer wall of the fire-resistant protective sleeve (13) is provided with a plurality of inclined through holes so that the outer openings of the through holes correspond to the inner wall of the oil well casing (1); the inner side of the fireproof protective sleeve (13) is in contact with the central pipe (18), and after the electric heating pipe (9) arranged at the bottom of the reaction inducing pipe column (17) is started and heated, heat is directly transmitted to the thermite reaction raw material (10) in the fireproof protective sleeve (13) through the central pipe (18) to induce thermite reaction.
2. The casing repair device of claim 1, wherein: the middle part of the reaction inducing pipe column (17) is provided with a positioner (11) and a temperature sensor (12), and the damaged part (19) of the oil well casing is positioned through the positioner (11); the reaction result of the thermite reaction raw material (10) in the refractory protective sleeve (13) is monitored by a temperature sensor (12).
3. The casing repair device of claim 1, wherein: the aluminothermic reaction raw materials (10) are prepared by uniformly mixing aluminum powder and ferric oxide according to the volume ratio of 2: 1.
4. The casing repair device of claim 1, wherein: the tin protective plug (8) is melted at high temperature, so that iron and aluminum oxide produced by thermite reaction are released to the pipe wall and the damaged part (19) of the oil well casing (1).
5. The casing reconditioning device of claim 1, wherein said tubing anchor (6) is an L MD tubing anchor.
6. The casing repair device of claim 1, wherein: the first packer (3) adopts a 3Y445 packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810085058.9A CN108194045B (en) | 2018-01-29 | 2018-01-29 | Sleeve pipe prosthetic devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810085058.9A CN108194045B (en) | 2018-01-29 | 2018-01-29 | Sleeve pipe prosthetic devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108194045A CN108194045A (en) | 2018-06-22 |
| CN108194045B true CN108194045B (en) | 2020-07-10 |
Family
ID=62591054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810085058.9A Active CN108194045B (en) | 2018-01-29 | 2018-01-29 | Sleeve pipe prosthetic devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194045B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671069A (en) * | 2018-07-03 | 2020-01-10 | 中国石油化工股份有限公司 | Method for suspending and erecting sand bridge in oil-water well casing and leakage repairing method |
| CN111636839B (en) * | 2020-06-03 | 2022-10-28 | 胡淑美 | Coal mine excavation cement pipe crack repairing device and repairing method thereof |
| CN113137200B (en) * | 2021-04-29 | 2023-01-24 | 扬州工业职业技术学院 | Chemical method repairing device for petroleum casing pipe |
| GB202112492D0 (en) * | 2021-09-02 | 2021-10-20 | Head Philip | All metal-to-metal casing patch |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074970A (en) * | 1992-01-29 | 1993-08-04 | 西安近代化学研究所 | Explosives for underground welding and expanding well casing in oil field |
| CN101457637A (en) * | 2009-01-06 | 2009-06-17 | 刘文西 | Sealing expansion tube apparatus for repairing petroleum thermal production well and implementing method |
| CN102516963A (en) * | 2011-10-17 | 2012-06-27 | 中国石油天然气股份有限公司 | Chemical composite resin sealing agent for repairing oil-water well casing |
| WO2015030721A1 (en) * | 2013-08-27 | 2015-03-05 | Halliburton Energy Services, Inc. | Acid diversion treatments in injection wells using permeability modifiers |
| WO2015150828A2 (en) * | 2014-04-04 | 2015-10-08 | Bisn Tec Ltd | Well casing/tubing disposal |
| CN106930713A (en) * | 2015-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | Casing pipe damage repairing method |
| CN107474808A (en) * | 2017-07-17 | 2017-12-15 | 陕西森瑞石油技术开发有限公司 | A kind of Oil/gas Well sleeve plugging resin sealing agent and preparation method and application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2789791A1 (en) * | 2013-04-12 | 2014-10-15 | Welltec A/S | A downhole expandable tubular |
-
2018
- 2018-01-29 CN CN201810085058.9A patent/CN108194045B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074970A (en) * | 1992-01-29 | 1993-08-04 | 西安近代化学研究所 | Explosives for underground welding and expanding well casing in oil field |
| CN101457637A (en) * | 2009-01-06 | 2009-06-17 | 刘文西 | Sealing expansion tube apparatus for repairing petroleum thermal production well and implementing method |
| CN102516963A (en) * | 2011-10-17 | 2012-06-27 | 中国石油天然气股份有限公司 | Chemical composite resin sealing agent for repairing oil-water well casing |
| WO2015030721A1 (en) * | 2013-08-27 | 2015-03-05 | Halliburton Energy Services, Inc. | Acid diversion treatments in injection wells using permeability modifiers |
| WO2015150828A2 (en) * | 2014-04-04 | 2015-10-08 | Bisn Tec Ltd | Well casing/tubing disposal |
| CN106930713A (en) * | 2015-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | Casing pipe damage repairing method |
| CN107474808A (en) * | 2017-07-17 | 2017-12-15 | 陕西森瑞石油技术开发有限公司 | A kind of Oil/gas Well sleeve plugging resin sealing agent and preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108194045A (en) | 2018-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108194045B (en) | Sleeve pipe prosthetic devices | |
| CN108204216B (en) | Application method of casing pipe repairing device | |
| US5833001A (en) | Sealing well casings | |
| CN104153753B (en) | Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging | |
| BRPI0307686B1 (en) | apparatus for forming a borehole casing in a borehole, method and system for forming a borehole casing in an underground formation, and, borehole casing positioned in a borehole within an underground formation | |
| MXPA02007728A (en) | Method and apparatus for stimulation of multiple formation intervals. | |
| US6935429B2 (en) | Flash welding process for field joining of tubulars for expandable applications | |
| WO2014108431A2 (en) | A method for plugging a hydrocarbon well | |
| WO2016101680A1 (en) | Underground gasification well-cementing method and well structure | |
| CA2913933A1 (en) | Well abandonment tool and method of use | |
| US3379252A (en) | Well completion for extreme temperatures | |
| CN108457612B (en) | Chemical method for repairing petroleum casing pipe | |
| CN104929558B (en) | Fixed point takes set process | |
| US11299949B2 (en) | Thermal apparatus and associated methods | |
| CN219101298U (en) | Degradable expansion rubber plug for oil pipe | |
| US4326586A (en) | Method for stressing thermal well casings | |
| CN109630051B (en) | Chemical method repairing device for petroleum casing pipe | |
| RU2726718C1 (en) | Well completion method | |
| US4147213A (en) | Combustion air injection well | |
| CN114763732A (en) | Pressure control casing drilling method for underground injection pressure containing stratum | |
| RU2237796C1 (en) | Method for reinforcing well shaft and device for realization of said method | |
| CN111236909A (en) | Full-bore infinite staged fracturing tool and using method thereof | |
| US3583485A (en) | Thermal prestressing of casing | |
| RU155018U1 (en) | DEVICE FOR PHYSICAL LIQUIDATION OF WELLS | |
| WO2024083173A1 (en) | Casing nipple and tubular structure |
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 | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Dongzhang Inventor after: Han Yutong Inventor before: Han Yutong |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200615 Address after: 257091 No.55 Fuqian street, Dongying Economic and Technological Development Zone, Dongying City, Shandong Province Applicant after: Liu Dongzhang Applicant after: Liu Bowen Applicant after: Zou Xiaonan Address before: 257091 No. 18 East Fourth Road, Dongying District Economic Development Zone, Dongying, Shandong Applicant before: Han Yutong |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230506 Address after: 257000 No. 258, Ji'nan Road, Dongying District, Shandong, Dongying Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Address before: 257091 No.55, Fuqian street, Dongying Economic and Technological Development Zone, Dongying City, Shandong Province Patentee before: Liu Dongzhang Patentee before: Liu Bowen Patentee before: Zou Xiaonan |