CN108194045A - A kind of casing repairing device - Google Patents
A kind of casing repairing device Download PDFInfo
- Publication number
- CN108194045A CN108194045A CN201810085058.9A CN201810085058A CN108194045A CN 108194045 A CN108194045 A CN 108194045A CN 201810085058 A CN201810085058 A CN 201810085058A CN 108194045 A CN108194045 A CN 108194045A
- Authority
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- China
- Prior art keywords
- casing
- refractory protection
- protection set
- reaction
- central tube
- 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.)
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 112
- 239000003129 oil well Substances 0.000 claims abstract description 45
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 238000005485 electric heating Methods 0.000 claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 49
- 229910052742 iron Inorganic materials 0.000 claims description 24
- 239000004411 aluminium Substances 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 16
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 14
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 claims description 9
- 230000008439 repair process Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 19
- 239000004568 cement Substances 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 13
- 239000010410 layer Substances 0.000 description 6
- 229940067573 brown iron oxide Drugs 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000007790 scraping Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction 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
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000002441 reversible effect Effects 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
- 230000000638 stimulation Effects 0.000 description 1
- 230000002459 sustained effect Effects 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
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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 present invention relates to a kind of casing repairing devices.Its technical solution is：Packer is installed in the bottom of oil well casing, top is equipped with isolating and protecting sand；Tubing anchor is installed in the inner wall of the oil well casing on the top of isolating and protecting sand; the lower end of central tube is fixed by the inner wall of tubing anchor and oil well casing; the top of tubing anchor is equipped with metal packer; the top of the central tube connect fixation with wellhead assembly; refractory protection set is connected by pressure balance check valve in the lower section of centering short segment; thermit reaction raw material is equipped in the annular housing of the refractory protection set; and refractory protection set is sleeved on the outer wall of central tube; the inner cavity installation reaction of central tube induces tubing string, and advantageous effect is：The thermit reaction raw material that inner cavity is covered to refractory protection by electric heating tube heats; so as to make thermit reaction raw material that controllable thermit reaction occur; the breakage of casing is blocked and is repaired; the casing inner diameter different problems of existing recovery technique are avoided, also avoid existing the problem of being leaked again by cement.
Description
Technical field
The present invention relates to a kind of petroleum pipeline tool prosthetic device and method, more particularly to a kind of casing repairing devices.
Background technology
In the recovery process of oil gas field, since geological conditions is more complicated, such as inclined shaft, horizontal well etc., often go out
The situation of existing oil well casing breakage.Casing damage can cause to endanger as follows to oil field development：1st, flow string cannot be normal
G.I.H；2nd, when casing bad position is in water layer or layer of sand position, oil well largely can be discharged or shake out；3rd, stimulation of well
Can not carry out；4th, the outer blowout of casing is easily caused；5th, oil well is caused to be scrapped.
To casing collapse, seamed or hole repairing has following several method：1st, squeeze cementing：When formation pressure is little, break
When splitting and missing not serious, it can be placed under repair with the method for squeeze cementing.Its technique method is：First with it is smaller than casing inner diameter by 8~
10 millimeters of gauguste cutter latus rectums, then in the next hanging plugging device in cut appropriate location（Tool title is bridge plug）, cut with
Well-sinking seals off temporarily, then a certain amount of cement mortar is injected more than bridge plug, it is made to be frozen into cement plug, after cement plug solidification,
The cement plug opened in casing is bored, and pressure testing checks the cut quality of cement sealing, after sealing to be confirmed is up-to-standard, then bores out outstanding
Empty plugging device（Bridge plug）, and sand washing is to shaft bottom.The casing repaired in this way can generally bear the pressure of 40~80 megapascal, with
The well has high-voltage construction that lower packet is answered to protect afterwards, and the section is avoided to bear high pressure.2nd, allowance law：Exactly pasted on the inner wall of bad casing
One layer of thin-walled tube, to achieve the purpose that reparation.Its technological principle is：Ripple is covered on a kind of special high pressure resistant rubber tube
Pipe（Thin-wall tube）After arriving well inner sleeve damage position down, building the pressure makes rubber tube expansion distending bellows simultaneously, is close to bellows
Casing breakage inner wall, and casing and bellows are bonded into one by binding agent, after to be bonded dose of curing, movable drilling tool,
High pressure resistant rubber tube takes out.This inflatable technology method is simple, safe operation.3rd, casing replacing：When rupture location is on oil well top,
And when can be buckled to taking-up cut more than casing, accident section more than casing can be all brought up with method of reverse deduction, tripping in is new again
Casing is tight to buckling well.The benefit of the method is to ensure that the consistency of casing inner diameter, and downhole tool during later operation can be suitable
Profit passes through；Shortcoming is that the casing screw thread degree of tightening of underground make-up is not so good as to obtain tightly, and the cost of more casing replacing on well head
Compare high, also more difficult operation.
Wherein, subsidize repairing method the problem is that：When needing sand control, tripping in sand control pipe is needed；When need over the ground
When layer transformation is acidified, tripping in is needed to be acidified tubing string；When needing to carry out pressure break to stratum, then tripping in fracturing string；Due to
The internal diameter of steel pipe is less than the internal diameter of casing, in this way, the diameter of the tool of tripping in and specification are required for becoming smaller, causes the liquid of injection
Amount becomes smaller, and influences the effect of sand control, acidification and pressure break, in addition, steel pipe forms a projection shape of internal surface of sleeve pipe, in this way, under
Enter tubing string and be susceptible to situation about blocking.
Squeeze method slurry processes the problem is that：When scene needs acidizing treatment, because cement is alkaline, acid solution and water
Mud can react, and the loophole repaired can be caused to leak out again in this way.
Invention content
The purpose of the present invention provides a kind of casing repairing device, uses aiming at drawbacks described above of the existing technology
The iron of generation and alundum (Al2O3) are overlayed on the breakage of oil well casing, then by grinding so as to real by the method for thermit reaction
The problem of having showed the reparation of oil well casing, having also avoided the problem of internal diameter in the prior art becomes smaller and leak out again.
A kind of casing repairing device that the present invention mentions, technical solution are：Including the first blind plugging（2）, the first packer
（3）, isolating and protecting sand（4）, the second blind plugging（5）, tubing anchor（6）, metal packer（7）, tin system protection plug（8）, electric heating tube
（9）, thermit reaction raw material（10）, refractory protection set（13）, pressure balance check valve（14）, centering short segment（15）, reaction induce
Tubing string（17）, central tube（18）, in oil well casing（1）Bottom install the first packer（3）, and the first packer（3）Bottom
Portion is equipped with the first blind plugging（2）, in the first packer（3）Top be equipped with isolating and protecting sand（4）；In the isolating and protecting sand（4）
Top oil well casing（1）Inner wall installation tubing anchor（6）, central tube（18）Lower end pass through tubing anchor（6）With oil well set
Pipe（1）Inner wall fix, and the central tube（18）Bottom install the second blind plugging（5）, the tubing anchor（6）Top be equipped with
Metal packer（7）, the central tube（18）Top and wellhead assembly（16）Connection is fixed, and middle part is equipped with centering short segment
（15）, in centering short segment（15）Lower section pass through pressure balance check valve（14）Connect refractory protection set（13）, the fire resisting guarantor
Sheath（13）Annular housing in be equipped with thermit reaction raw material（10）, and refractory protection set（13）It is sleeved on central tube（18）It is outer
Wall, the refractory protection set（13）Outer wall be equipped with multiple through-holes, and install tin system protection plug（8）, the central tube（18）'s
Inner cavity installation reaction induces tubing string（17）, induce tubing string in reaction（17）Bottom be equipped with electric heating tube（9）, pass through electric heating tube
（9）To refractory protection set（13）The thermit reaction raw material of inner cavity（10）It is heated, so as to make thermit reaction raw material（10）Occur
Chemical reaction, by the breakage of casing（19）It blocks and repairs.
Preferably, above-mentioned reaction induces tubing string（17）Middle part be equipped with locator（11）And temperature sensor（12）, lead to
Cross locator（11）By the breakage of oil well casing（19）Positioning；Pass through temperature sensor（12）To refractory protection set（13）Interior
Thermit reaction raw material（10）Reaction result be monitored.
Preferably, above-mentioned thermit reaction raw material（10）Using aluminium powder and di-iron trioxide according to volume ratio 2:1 ratio
It is uniformly mixed.
Preferably, above-mentioned refractory protection set（13）Bottom lock, open top and is installed on pressure balance check valve
（14）, the refractory protection set（13）Outer wall be equipped with multiple inclined through-holes, make the collar extension and oil well casing of through-hole（1）It is interior
Wall is corresponding；The refractory protection set（13）Inside and central tube（18）Contact, the reaction induce tubing string（17）Bottom is set
Some electric heating tubes（9）After starting heating, heat is directly passed through into central tube（18）It is transmitted to refractory protection set（13）Interior aluminium
Thermal response raw material（10）, induce thermit reaction.
Preferably, above-mentioned tin system protection plug（8）It melts at high temperature, so as to which the iron of thermit reaction production and three be aoxidized
Two aluminium are discharged into oil well casing（1）Tube wall and breakage（19）.
Preferably, above-mentioned tubing anchor（6）Using LMD tubing anchors.
Preferably, the first above-mentioned packer（3）Using 3Y445 packers.
The beneficial effects of the invention are as follows：Pass through the first blind plugging of tripping in, the first packer and isolating and protecting in oil well casing
Sand, so as to which the fluid of lower part and the cavity at casing damage be separated；Again by repair tubing string tripping in casing breakage near,
Tripping in reaction induces tubing string again, and startup power supply switchs, and the electric heater for heating that tubing string bottom is induced by reaction repairs tubing string
Interior refractory protection set, until the thermit reaction raw material generation thermit reaction in refractory protection set, and the iron of thermit reaction generation
The breakage of casing can be carried out mending-leakage reparation, and pass through grinding by water and alundum (Al2O3), be finally completed repairing for oil well casing
It is multiple, the casing inner diameter different problems after reparation of the existing technology are avoided, also avoid existing to leak again by cement
The problem of；For the present invention using thermit reaction, the method that grinding and scraping is recycled to be combined is restored to the part of casing repairing
Tunica pipe and reaches the performance of tunica pipe with the requirement of diameter.
Description of the drawings
Attached drawing 1 is the structure diagram of the present invention；
Attached drawing 2 is the structure diagram of thermit reaction raw material and refractory protection set；
Attached drawing 3 is the structure diagram that reaction induces tubing string；
In upper figure：Oil well casing 1, the first blind plugging 2, the first packer 3, isolating and protecting sand 4, the second blind plugging 5, tubing anchor 6, metal
Packer 7, tin system protection plug 8, electric heating tube 9, thermit reaction raw material 10, locator 11, temperature sensor 12, refractory protection set
13rd, pressure balance check valve 14, centering short segment 15, wellhead assembly 16, reaction induce tubing string 17, central tube 18, breakage 19, more
Side shape shape 9.1, closed base 13.1, groove 13.2, casing repairing section a-a.
Specific embodiment
The preferred embodiment of the present invention is illustrated below in conjunction with attached drawing, it should be understood that preferred reality described herein
It applies example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Embodiment 1, with reference to attached drawing 1,2 and 3, a kind of casing repairing device that the present invention mentions, including the first blind plugging 2, the
One packer 3, isolating and protecting sand 4, the second blind plugging 5, tubing anchor 6, metal packer 7, tin system protection plug 8, electric heating tube 9, aluminium
Thermal response raw material 10, refractory protection set 13, pressure balance check valve 14, centering short segment 15, reaction induce tubing string 17, central tube
18, the first packer 3 is installed in the bottom of oil well casing 1, and the bottom of the first packer 3 is equipped with the first blind plugging 2, in the first envelope
Isolating and protecting sand 4 is equipped with every the top of device 3；Tubing anchor is installed in the inner wall of the oil well casing 1 on the top of the isolating and protecting sand 4
6, the lower end of central tube 18 is fixed by tubing anchor 6 and the inner wall of oil well casing 1, and the bottom installation second of the central tube 18
Blind plugging 5, the top of the tubing anchor 6 are equipped with metal packer 7, and the top of the central tube 18 is connect admittedly with wellhead assembly 16
Fixed, middle part is equipped with centering short segment 15, and refractory protection set 13 is connected by pressure balance check valve 14 in the lower section of centering short segment 15,
Thermit reaction raw material 10 is equipped in the annular housing of the refractory protection set 13, and refractory protection set 13 is sleeved on the outer of central tube 18
Wall is equipped with multiple through-holes, and install tin system protection plug 8 on the downside of the outer wall of refractory protection set 13, the central tube 18 it is interior
Chamber installation reaction induces tubing string 17, and the bottom outside that tubing string 17 is induced in reaction is equipped with electric heating tube 9, right by electric heating tube 9
The thermit reaction raw material 10 that refractory protection covers 13 inner cavities is heated, will so as to chemically react thermit reaction raw material 10
The breakage 19 of casing, which blocks, to be repaired.
With reference to attached drawing 3, in addition, the middle part that the reaction of the present invention induces tubing string 17 is equipped with locator 11 and temperature sensor
12, the breakage 19 of oil well casing is positioned by locator 11, which is used to position the position of breakage 19；Pass through temperature
Degree sensor 12 is monitored the reaction result of the thermit reaction raw material 10 in refractory protection set 13, moreover, reaction induces pipe
Column 17 is made of heat-barrier material, itself heat transfer coefficient is small, and the heat for reducing thermit reaction is transmitted to the interior of reaction induction tubing string
Chamber, because inner cavity is equipped with the electric lead being connect with electric heating tube 9, the data line also being connect with temperature sensor, locator,
It cannot all be burnt out because of the heat of thermit reaction；Electric heating tube 9 is sleeved on the bottom outside that reaction induces tubing string 17, heat-insulated closing
Good, when power switch is after well head starts, electric heating tube 9 is begun to warm up, and heat passes through central tube made of metal 18 first
Outer wall, the thermit reaction raw material 10 being transmitted in refractory protection set 13, until temperature promotion starts to aluminium powder and di-iron trioxide
Reaction, since its reaction is exothermic reaction, reacted successively upwards from the lower section of refractory protection set 13, generate molten iron and three
Al 2 O water, the density of molten iron is big, and the multiple through-holes being equipped with along refractory protection 13 outer walls of set flow out, the plug of tin system protection at this time
8 melt at high temperature, so, the iron and alundum (Al2O3) of liquid can smoothly flow out, due under refractory protection set 13
Side is equipped with metal packer 7, in this way, the iron and alundum (Al2O3) of liquid can only cover the seam between 13 and casing along refractory protection
Gap flows up, and entire chamber is smaller, and temperature is higher, and the aluminium powder of refractory protection set 13 and di-iron trioxide continuation are being reacted,
So the iron and alundum (Al2O3) of liquid can be flowed up persistently, until encountering the breakage of casing, breakage is filled
Get up, and the temperature outside breakage is relatively low, just starts to solidify in this way, until breakage filling finishes, the iron of liquid and three oxygen
Change the gap that two aluminium are continued between casing and refractory protection set 13 to flow up, until final thermit reaction finishes, slowly
It is cooled into firm repair layer；At this time since reaction induces tubing string still mounted on the center of refractory protection set 13, temperature passes
Sensor still by the control room of temperature data uploading to outer wellhead, can begin to decline according to temperature from well head and then judge aluminothermy
Reaction terminates, and above proposes reaction and induces tubing string, then carry out grinding and the scraping operations of next step.
Wherein, thermit reaction raw material 10 of the invention uses aluminium powder and di-iron trioxide according to volume ratio 2:1 ratio is mixed
Close uniform, and the size of the breakage measured according to the survey meter of well logging determines the number of filling aluminium powder and di-iron trioxide
Amount, so as to meet the needs of casing repairing.
With reference to attached drawing 2, the bottom of refractory protection of the invention set 13 is equipped with closed base 13.1, and the closed base
13.1 center is equipped with groove 13.2, and the groove 13.2 is arc groove, and induces the polygon of 17 bottom of tubing string with reacting
The electric heating tube 9 of shape shape 9.1 coordinates, and can play the role of positioning and fixed, and reaction is induced tubing string 17 is located in closing
The center of pedestal 13.1, convenient for the temperature Synchronous lifting around during heating, keep from heat it is uneven caused by reaction it is different
Influence the quality of casing repairing；In addition, refractory protection covers 13 open top and is installed on pressure balance check valve 14, it is described resistance to
The outer wall of fiery protective case 13 is equipped with multiple inclined through-holes, and the collar extension for making through-hole is corresponding with the inner wall of oil well casing 1；It is described resistance to
The inside of fiery protective case 13 is contacted with central tube 18, and the reaction induces the electric heating tube 9 that 17 bottom of tubing string is equipped with and starts heating
Afterwards, the thermit reaction raw material 10 heat being directly transmitted to by central tube 18 in refractory protection set 13, induces thermit reaction.
The refractory protection set 13 is annular tubular structure, and inner wall is equipped with refractory material, can bear 2500 degree of height
Temperature, for example using refractory brick made of zirconium oxide, top setting pressure balance check valve 14 avoids the aluminium at the top of in reaction process
Powder and brown iron oxide seriously collapse, and make the two-way pressure balance of refractory protection set 13, also avoid aluminium powder and brown iron oxide disposable
Fast reaction controls reaction speed, reduces the severe degree of reaction.
Tin system protection plug 8 melts at high temperature, and tin system protection plug 8 melts, in this way, by aluminium due to being tin system under high temperature
The iron and alundum (Al2O3) of thermal response generation are discharged into the tube wall of oil well casing 1 and breakage 19, and set is realized after cooled and solidified
The reparation of pipe, then make casing inner diameter identical with scraping by being ground.
In addition, since the thermit reaction of the present invention is carried out under confined conditions at one, so in refractory protection set 13
Top setting pressure balance check valve 14 can control the process of thermit reaction, although thermit reaction is violent, pass through air inlet
Control, and the thermit reaction of the present invention is made to maintain a relatively mild reaction process, the method for use is：First, according to volume
Proportioning 2:1 ratio addition aluminium powder and brown iron oxide, and aluminium powder and brown iron oxide are more fluffy, you can make reaction mild, protect
Safety is demonstrate,proved.
The tubing anchor 6 of the present invention uses LMD tubing anchors, and the first packer 3 uses 3Y445 packers.
The application method of a kind of casing repairing device that the present invention mentions, includes the following steps：
1st, first, by the survey meter of well logging, the breakage 19 of oil well casing 1 is found, by 3 tripping in oil well set of the first packer
Pipe lower part is insulated, and installs the first blind plugging 2, the crude oil of casing part is isolated, then by 4 the first envelope of tripping in of isolating and protecting sand
Protective layer is formed every 3 top of device；
2nd, into oil well casing 1, tubing string is repaired in tripping in：By the second blind plugging 5, tubing anchor 6, metal packer 7, thermit reaction raw material
10th, the reparation tubing string tripping in oil well set that refractory protection set 13, pressure balance check valve 14, centering short segment 15 and central tube 18 form
In pipe 1, and entire tubing string of repairing is positioned, carried out after the completion of positioning setting, entire one section of tubing string is repaired by above carrying
Height pushes again, so that it may so that tubing anchor 6 is completed setting, make entirely to repair tubing string and is supported；Continue to push, insulate metal
Device 7 is realized setting；
3rd, 18 tripping in of the central tube reaction into oil well casing 1 induces tubing string 17, and react the electrical heating for inducing 17 bottom of tubing string
Pipe 9 is located at the bottom of refractory protection set 13, and thermit reaction raw material 10 is housed in refractory protection set 13, starts electric heating tube 9, heat
Refractory protection is covered by the thermit reaction raw material 10 in 13 by the outer wall of central tube 18 and is heated to reaction temperature；And it is induced in reaction
Installation positioner 11 and temperature sensor 12 on tubing string 17, after thermit reaction raw material 10 starts reaction, due to aluminium powder and three oxygen
It is exothermic reaction to change the chemical reaction between two iron, so, the temperature data that temperature sensor 12 obtains is in lasting rising, from well
Mouth may determine that reaction induces the induction of tubing string 17 and reacts successfully, and stopping continues to heat, and at this moment the data of temperature sensor 12 maintain
Process that is steady or slowly rising, illustrates aluminium powder and di-iron trioxide in sustained response, the iron and alundum (Al2O3) of generation then lead to
The through-hole crossed on the outside of refractory protection set 13 flows in the gap between refractory protection set 13 and casing and the breakage 19 of casing, directly
Terminate to reaction, the data of temperature sensor feedback decline, and complete thermit reaction to the mending-leakage around the breakage of oil well casing；
4th, it takes out reaction and induces tubing string 17, along oil well casing tripping in survey meter, find out the reparation situation of oil well casing, then will
Central tube rotates, and can separate upper portion centers pipe and the central tube of 15 lower part of centering short segment, stay in oil well casing inner cavity
The iron that generates after being centering short segment 15, pressure balance check valve 14, lower part central tube, refractory protection set 13 and thermit reaction
And alundum (Al2O3), then by grinding, the component left in above-mentioned oil well casing is ground, then again by the remaining object of grinding and
Isolating and protecting sand 4 is washed out by clean-out service outside oil well casing；
5th, the tripping in latus rectum pipe cleaning in oil well casing, is made identical above and below the internal diameter of oil well casing by scraping, is fully returned to cover
The design requirement of pipe, tripping in survey meter, detects oil well casing, finds out the recovery situation of casing again again；Finally by first
3 and first blind plugging 2 of packer is taken out, and completes casing repairing operation.
It should be noted that：The process of above-mentioned thermit reaction is as follows：
Electric heating tube 9 is sleeved on the bottom outside that reaction induces tubing string 17, heat-insulated to close, when power switch is after well head starts,
Electric heating tube 9 is begun to warm up, and heat by the outer wall of central tube made of metal 18, is transmitted in refractory protection set 13 first
Thermit reaction raw material 10, until temperature promotion starts to react to aluminium powder and di-iron trioxide, since its reaction is exothermic reaction, because
This, from the lower section of refractory protection set 13 reacts, generates molten iron and alundum (Al2O3) water successively upwards, and the density of molten iron is big, along
Refractory protection covers multiple through-holes outflow that 13 outer walls are equipped with, and the plug of tin system protection at this time 8 melts at high temperature, so, liquid
Iron and alundum (Al2O3) can smoothly flow out, due to refractory protection set 13 lower section be equipped with metal packer 7, in this way, liquid
Iron and alundum (Al2O3) can only along refractory protection cover 13 and casing between gap flow up, entire chamber is smaller, temperature
Degree is higher, and the aluminium powder of refractory protection set 13 and di-iron trioxide continuation are being reacted, so, the iron and alundum (Al2O3) of liquid can
Flowed up with lasting, until encountering the breakage of casing, breakage filling got up, and the temperature outside breakage compared with
It is low, just start to solidify in this way, until breakage filling finishes, the iron and alundum (Al2O3) of liquid continue on casing and fire resisting guarantor
Gap between sheath 13 flows up, until final thermit reaction finishes, is slowly cooled into firm repair layer.
In addition, the refractory protection set 13 of the present invention is annular tubular structure, inner wall uses refractory brick made of zirconium oxide,
2500 degree of high temperature can be born, top setting pressure balance check valve 14 avoids the aluminium powder at top and oxidation in reaction process
Iron powder seriously collapses, and makes the two-way pressure balance of refractory protection set 13, also avoids aluminium powder and the disposable fast reaction of brown iron oxide,
Reaction speed is controlled, reduces the severe degree of reaction.
In addition, the grinding and scraping of the present invention are the prior art, no longer it is described in detail.
Embodiment 2, the bottom of refractory protection of the invention set 13 are equipped with closed base 13.1, and the closed base 13.1
Center be equipped with groove 13.2, the groove 13.2 is polygonal grooves, and the polygon with react induction tubing string 17 bottom
The electric heating tube 9 of shape coordinates, and can play the role of positioning and fixed；In addition, open top and the peace of refractory protection set 13
Equipped with pressure balance check valve 14, it is respectively equipped in the different level height of the outer wall of refractory protection set 13 multiple inclined
Through-hole, the collar extension for making the through-hole of differentiated levels is corresponding with the inner wall of oil well casing 1, equipped with the multigroup of differentiated levels
Through-hole, there are the advantages of be：In 10 reaction process of thermit reaction raw material in refractory protection set 13, the reaction generation of lower part
Liquid iron and alundum (Al2O3) can be flowed out along the through-hole of bottom, middle part reaction generation liquid iron and alundum (Al2O3)
It can be flowed out along the through-hole at middle part, the iron and alundum (Al2O3) of the liquid of top reaction generation can be along the through-hole streams on top
Go out, mainly ensure that the iron of liquid and alundum (Al2O3) smoothly can all flow out in refractory protection set 13, so as to fill out
Fill the gap between refractory protection set 13 and casing and breakage.
The above, is only the part preferred embodiment of the present invention, and any those skilled in the art may profit
Equivalent technical solution is changed or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (7)
1. a kind of casing repairing device, it is characterized in that：Including the first blind plugging（2）, the first packer（3）, isolating and protecting sand（4）、
Second blind plugging（5）, tubing anchor（6）, metal packer（7）, tin system protection plug（8）, electric heating tube（9）, thermit reaction raw material
（10）, refractory protection set（13）, pressure balance check valve（14）, centering short segment（15）, reaction induce tubing string（17）, central tube
（18）, in oil well casing（1）Bottom install the first packer（3）, and the first packer（3）Bottom be equipped with the first blind plugging
（2）, in the first packer（3）Top be equipped with isolating and protecting sand（4）；In the isolating and protecting sand（4）Top oil well set
Pipe（1）Inner wall installation tubing anchor（6）, central tube（18）Lower end pass through tubing anchor（6）With oil well casing（1）Inner wall consolidate
It is fixed, and the central tube（18）Bottom install the second blind plugging（5）, the tubing anchor（6）Top be equipped with metal packer
（7）, the central tube（18）Top and wellhead assembly（16）Connection is fixed, and middle part is equipped with centering short segment（15）, it is short in righting
Section（15）Lower section pass through pressure balance check valve（14）Connect refractory protection set（13）, the refractory protection set（13）Annular
Thermit reaction raw material is equipped in cavity（10）, and refractory protection set（13）It is sleeved on central tube（18）Outer wall, the refractory protection
Set（13）Outer wall be equipped with multiple through-holes, and install tin system protection plug（8）, the central tube（18）Inner cavity installation reaction induce
Tubing string（17）, induce tubing string in reaction（17）Bottom be equipped with electric heating tube（9）, pass through electric heating tube（9）To refractory protection set
（13）The thermit reaction raw material of inner cavity（10）It is heated, so as to make thermit reaction raw material（10）It chemically reacts, by casing
Breakage（19）It blocks and repairs.
2. casing repairing device according to claim 1, it is characterized in that：The reaction induces tubing string（17）Middle part set
There is locator（11）And temperature sensor（12）, pass through locator（11）By the breakage of oil well casing（19）Positioning；Pass through temperature
Spend sensor（12）To refractory protection set（13）Interior thermit reaction raw material（10）Reaction result be monitored.
3. casing repairing device according to claim 1, it is characterized in that：The thermit reaction raw material（10）Using aluminium powder
With di-iron trioxide according to volume ratio 2:1 ratio is uniformly mixed.
4. casing repairing device according to claim 1, it is characterized in that：The refractory protection set（13）Bottom lock,
Open top and it is installed on pressure balance check valve（14）, the refractory protection set（13）Outer wall be equipped with it is multiple inclined logical
Hole makes the collar extension and oil well casing of through-hole（1）Inner wall it is corresponding；The refractory protection set（13）Inside and central tube（18）
Contact, the reaction induce tubing string（17）The electric heating tube that bottom is equipped with（9）After starting heating, heat is directly passed through into central tube
（18）It is transmitted to refractory protection set（13）Interior thermit reaction raw material（10）, induce thermit reaction.
5. casing repairing device according to claim 1, it is characterized in that：The tin system protection plug（8）It melts at high temperature
Change, so as to which the iron of thermit reaction production and alundum (Al2O3) are discharged into oil well casing（1）Tube wall and breakage（19）.
6. casing repairing device according to claim 1, it is characterized in that：The tubing anchor（6）Using LMD tubing anchors.
7. casing repairing device according to claim 1, it is characterized in that：First packer（3）It is sealed using 3Y445
Every device.
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| CN201810085058.9A CN108194045B (en) | 2018-01-29 | 2018-01-29 | Sleeve pipe prosthetic devices |
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| CN201810085058.9A CN108194045B (en) | 2018-01-29 | 2018-01-29 | Sleeve pipe prosthetic devices |
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| CN108194045B CN108194045B (en) | 2020-07-10 |
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| 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 |
| CN111636839A (en) * | 2020-06-03 | 2020-09-08 | 胡淑美 | Coal mine excavation cement pipe crack repairing device and repairing method thereof |
| CN113137200A (en) * | 2021-04-29 | 2021-07-20 | 扬州工业职业技术学院 | Chemical method repairing device for petroleum casing pipe |
| WO2023031617A1 (en) * | 2021-09-02 | 2023-03-09 | Philip Head | All metal-to-metal casing patch |
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| GB2625029A (en) * | 2021-09-02 | 2024-06-05 | Head Philip | All metal-to-metal casing patch |
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| CN108194045B (en) | 2020-07-10 |
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