CN109083631B - Utilize the device and method for repairing and mending in coiled tubing repairing cementing concrete crack - Google Patents
Utilize the device and method for repairing and mending in coiled tubing repairing cementing concrete crack Download PDFInfo
- Publication number
- CN109083631B CN109083631B CN201811075559.5A CN201811075559A CN109083631B CN 109083631 B CN109083631 B CN 109083631B CN 201811075559 A CN201811075559 A CN 201811075559A CN 109083631 B CN109083631 B CN 109083631B
- Authority
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- China
- Prior art keywords
- liquid
- coiled tubing
- repairing
- cement
- cementing concrete
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/005—Monitoring or checking of cementation quality or level
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The present invention relates to the devices and method for repairing and mending using coiled tubing repairing cementing concrete crack, wherein utilize the method in cementing concrete crack between the device casing repairing and the borehole wall in coiled tubing repairing cementing concrete crack are as follows: whether detection underground cementing concrete first has a crack and duct, and and crack and duct position；By pumping through coiled tubing, filler liquid, cement, loaded liquid, slow setting liquid are successively pumped into pit shaft, cement is squeezed into the cementing concrete crack in casing and borehole wall annular space under the pressure of loaded liquid, then clear water is pumped into using coiled tubing, the mixing liquid in pit shaft, and well-flushing repeatedly are replaced, by annular space of the mixing liquid between production tube and coiled tubing, it returns and flows back to ground, then aspirated the clear water in pit shaft completely by coiled tubing.The present invention does not need closing well, it is not necessary to remove wellhead equipment and carry out repairing work, work efficiency is high, saves production cost.
Description
Technical field
The present invention relates to the well workover fields of oil/gas well, and in particular to utilizes the device in coiled tubing repairing cementing concrete crack
And method for repairing and mending.
Background technique
In drillng operation, the tripping in casing into well is needed to fix the borehole wall after the completion of drilling process, while needing to casing
Annular space between the borehole wall squeezes into cement filling annular space, fixed sleeving.But due to being mixed into cement during squeezing into cement
Gas squeezes into that technological operation is unqualified usually to generate small duct and crack in annular space cement.
Due to the presence in these ducts and crack, so that the gas in understratum can migrate upwards along duct and crack,
The water of upper formation can migrate downwards along duct and crack.Formation fluid comprising water and gas can by the perforation on casing into
Enter into pit shaft, in this way, the content of gas and water will greatly increase in the production fluid in pit shaft.Due to these water and gas
Separating treatment can only be carried out by the separator on ground, the increase of the content of gas and water will increase the cost of surface separation,
Reduce oil well produced speed simultaneously, largely effects on economic benefit.
In view of the above problems, the cement to the annular space between casing and the borehole wall is needed to repair.
Secondary cement squeeze work can be carried out by the cementing plug in casing in ongoing operations, repair crack and duct,
Cement plug is destroyed using drill bit after the completion of repairing.It is done so that when will do it closing well, influence the production of oil/gas well.Exist simultaneously
During drill bit destroys cement plug, casing can shake, and the cement in annular space is driven to shake together, can generate two to annular space cement
Secondary injury.
Summary of the invention
The object of the present invention is to provide the device using coiled tubing repairing cementing concrete crack, another mesh of the invention
Be to provide it is this using coiled tubing repairing cementing concrete crack device repairing cementing concrete crack method, by continuous
Oil pipe repairs the cement in annular space using principles such as density contrasts using the advantage that coiled tubing diameter is small, can lift, and solves
It has determined since cement duct and crack cause formation fluid to flow into the problem in pit shaft between casing and the borehole wall, has also avoided simultaneously
During destroying cement plug with drill bit in the prior art, because casing shake drive annular space in cementing concrete shake together due to it is right
The secondary injury that annular space cement generates.
The technical solution adopted by the present invention to solve the technical problems is: this to be split using coiled tubing repairing cementing concrete
The device of gap includes liquid storage tank, pump, coiled tubing, wellhead blowout preventer, gooseneck clamper, outer nozzle, packer, liquid storage tank,
On pump, the platform of coiled tubing roller bearing setting on the ground, coiled tubing is wrapped on coiled tubing roller bearing, coiled tubing one end
It is connected by the first connecting tube with the outlet of pump, the entrance of pump connects liquid storage tank；The other end of coiled tubing is filled from blowout preventer
It is protruded into production tube in the gooseneck clamper set, and its end is threadedly coupled with outer nozzle；Production tube top is provided with well
Mouth blowout hookup, gooseneck type clamper are arranged inside wellhead blowout preventer；Production tube upper end is provided with mudhole, and mudhole connects
The second connecting tube is connect, is provided with blowdown valve in the second connecting tube；Packer is arranged in the ring between production tube lower end and casing
In sky.
Pump is general-purpose centrifugal pump or screw pump in above scheme.
Cementing concrete crack between above-mentioned device casing repairing and the borehole wall using coiled tubing repairing cementing concrete crack
Method:
Whether detection underground cementing concrete first has a crack and duct, and and crack and duct position；
By pumping through coiled tubing, filler liquid, cement, loaded liquid, slow setting liquid are successively pumped into pit shaft, negative
Cement is squeezed into the cementing concrete crack in casing and borehole wall annular space under the pressure of carrier fluid body, is then pumped into using coiled tubing
Clear water replaces the mixing liquid in pit shaft, and well-flushing repeatedly, by ring of the mixing liquid between production tube and coiled tubing
Sky returns and flows back to ground, then is aspirated the clear water in pit shaft completely by coiled tubing.
Above-mentioned filler liquid is that have good thixotropic liquid, is that thickener, cross-linking compounds, water softener is added
Salting liquid, density are greater than the density of cement, into pit shaft after condense into colloidal, support cement simultaneously prevents cement and filler liquid
A large amount of mixing of body, colloidal resolve into liquid under external force, are gone out outside well by pumping suction；Thickener is hydroxyethyl
One of cellulose, guar polymer, carboxymethyl cellulose, cross-linking compounds are zirconium oxide, and water softener is ethylenediamine tetraacetic
Acetic acid softens.
Above-mentioned loaded liquid is clear water or the aqueous solution that thickener is added.
Above-mentioned slow setting liquid is bentonite-borax solution, and the effect of slow setting liquid is to delay cement setting time, is prevented
It is hardened in the wellbore, can not be returned and be ejected out of pit shaft.
The method in cementing concrete crack between coiled tubing casing repairing and the borehole wall is utilized in above scheme specifically: first
Whether detection underground cementing concrete has a crack and duct, and and crack and duct position；
According to the position in underground the cementing concrete crack and duct of detection, packing is set between production tube and casing
Outer nozzle is extend into casing shoe by adjusting coiled tubing by device, is opened pump and is pumped into filler liquid into coiled tubing, passes through
Outer nozzle injects in pit shaft, as filler liquid levels rise, lifts coiled tubing upwards, filler liquid levels are at pit shaft most bottom
Under end-fire hole site at 0.5m to 1m, after the completion of the injection of filler liquid, cement slurry is injected into pit shaft by outer nozzle, to
Cement liquid level is higher than at highest perforating site 0.3-0.5m, stops pumping cement；Load is injected into pit shaft by outer nozzle again
Liquid, the dosage of loaded liquid are 2 times of cement volume, thus computational load liquid level；
It waits 1-2 hours, after cement is pressed into perforation and gap by loaded liquid, coiled tubing is transferred, outer nozzle arrives
Up to the liquid level intersection of filler liquid and cement, slow setting liquid is injected when outer nozzle sprays slow setting liquid by outer nozzle and is mentioned upwards
Coiled tubing is drawn, pull rate is controlled, is sufficiently mixed slow setting liquid with cement, reaches loaded liquid and cement liquid to outer nozzle
When the intersection of face, stopping is pumped into slow setting liquid；Continue to lift coiled tubing, until outer nozzle leaves the upper liquid level of loaded liquid；
Wait solidifying about 6-10 hour, by coiled tubing and outer nozzle into pit shaft injected clear water, by the mixing liquid replacement in pit shaft at
Annular space of the mixing liquid between production tube and coiled tubing is returned and flows back to ground, and well-flushing repeatedly, then by well by clear water
Remaining water pumps out ground in cylinder.
The invention has the following advantages:
1) medium conveying is carried out by coiled tubing, can be adapted for the lesser well of borehole diameter and carries out remedial cement work
Industry.
2) closing well is not needed, it is not necessary to remove wellhead equipment and carry out repairing work, increase working efficiency, saving is produced into
This.
3) traditional first cementing plug has been abandoned, has bored the way of falling with drill bit again after completion, such process is easier, simultaneously
Secondary wound will not be generated to the cement repaired between casing and the borehole wall due to the vibration generated when boring cement plug
Evil.
Detailed description of the invention
Fig. 1 is apparatus of the present invention schematic diagram；
Fig. 2 is the schematic diagram after filler liquid injection of the present invention；
Fig. 3 is the schematic diagram after present invention injection cement；
Fig. 4 is the schematic diagram after present invention injection loaded liquid；
Schematic diagram when Fig. 5 is present invention injection slow setting liquid.
In figure: 1- liquid storage tank, 2- pump, the first connecting tube of 3-, 4- coiled tubing roller bearing, 5- wellhead blowout preventer, 6- are continuous
Oil pipe, 7- gooseneck clamper, 8- production tube head, the second connecting tube of 9-, 10- blowdown valve, 11- casing, 12- production tube, 13-
Cementing concrete, 14- packer, 17- perforation, the crack and duct of 18- cementing concrete, 19- outer nozzle, the stratum 20-, 21- filler
Liquid, 22- cement, 23- loaded liquid, 24- slow setting liquid.
Specific embodiment
The present invention will be further described below with reference to the drawings:
As shown in Figure 1, this device using coiled tubing repairing cementing concrete crack includes liquid storage tank 1, pumps 2, continuous
Oil pipe 6, wellhead blowout preventer 5, gooseneck clamper 7, outer nozzle 19, packer 14, liquid storage tank 1, pump 2, coiled tubing roller bearing 4 are set
It sets on platform on the ground, platform is higher than well head, and coiled tubing 6 is wrapped on coiled tubing roller bearing 4,6 one end of coiled tubing
It is connected by the first connecting tube 3 with the outlet of pump 2, pumps 2 entrance connection liquid storage tank 1；The other end of coiled tubing 6 is anti-from well head
It is protruded into pit shaft in the gooseneck clamper 7 of spray apparatus 5, and end is threadedly coupled by crossover sub with outer nozzle 19；In pit shaft
Production tube head 8 be provided with wellhead blowout preventer 5, gooseneck type clamper 7 is arranged inside wellhead blowout preventer 5, gooseneck type
Coiled tubing 6 is fixed on well head by clamper 7, convenient in 6 lower going-into-well of coiled tubing；Production tube 12 passes through known fixation side
Method is fixed on the borehole wall, is located in sleeve, and 12 upper end of production tube has mudhole, and mudhole passes through the second connecting tube 9 and blowdown
Pump connects, and blowdown valve 10 is provided in the second connecting tube 9, and the outlet of dredge pump connects sewage pipe, sewage pipe and cesspool connection；
Packer 14 is arranged in the annular space between 12 lower end of production tube and casing.
Coiled tubing 6 in the present invention is general coiled tubing, for conveying liquid.Production tube 12 is general production oil
Pipe, for conveying liquid.
Cementing concrete crack between this device casing repairing and the borehole wall using coiled tubing repairing cementing concrete crack
Method:
Whether first according to known technology, can detecte down-hole annular cementing concrete 13 has a crack and duct, and and
The position in crack and duct, and position is established a capital really and can be realized according to the prior art in all pit shafts in the present invention.Once really
Determining annular space cementing concrete 13, there are cracks and duct, then can be repaired using method for repairing and mending of the invention.
Before starting repairing work, need to carry out clean-out service.By 6 lower going-into-well bottom of coiled tubing, by pumping 2 to continuous oil
Pipe 6 is pumped into clear water, and clear water is sprayed in 6 bottom of coiled tubing by outer nozzle 19,19 side of outer nozzle water spray, 6 side of coiled tubing to
Upper lifting, the Lai Qingxi borehole wall and perforation.To avoid pollution stratum, the sewage after cleaning passes through production tube 12 and coiled tubing 6
Between annular space, returned from blowdown valve 10 and flow back to ground sewage pond.
After the completion of well-flushing, according to the physical location in the down-hole annular cement crack and duct that determine, in production tube 12
Packer 14 is set between casing, from ground liquid storage tank 1, filler liquid 21 is pumped into coiled tubing 6 by pump 2, is passed through
Lower end outer nozzle 19 injects in pit shaft, and with the injection of fluid, liquid level rises, while lifting coiled tubing 6 upwards.Filler liquid
21 injection rates according to wellbore volume determine, 21 liquid level of filler liquid should under the position of pit shaft lowermost end perforation 17 0.5m to 1m
Place, highest cannot be higher than the position of pit shaft lowermost end perforation 17, and filler liquid 21 is as shown in Figure 2 after injecting.
Cement 22 is then injected in ground liquid storage tank 1, by the first connecting tube 3, using pump 2 by 22 company of being pumped into of cement
In continuous oil pipe 6, being sprayed from 6 lower end outer nozzle 19 of coiled tubing, 19 side spraying cement 22 of outer nozzle, side lifts coiled tubing 6 upwards,
To 22 liquid level of cement, it is higher than at 17 position 0.3-0.5m of highest perforation, stops pumping cement 22, such as Fig. 3 institute after cement slurry injection
Show.
Close the valve of coiled tubing 6.Cleaning or replacement liquid storage tank 1, loaded liquid 23 is added in liquid storage tank 1, utilizes
Loaded liquid 23 is pumped into coiled tubing 6 by pump 2, is sprayed from coiled tubing lower end outer nozzle 19, the spray load of 19 side of outer nozzle
Liquid 23, side lift coiled tubing 6 upwards.The dosage of loaded liquid 23, about 2 times of 22 volume of cement, thus calculate liquid
Face height, shuts down injection pump 2 in due course, and loaded liquid 23 is as shown in Figure 4 after injecting.
It waits about 1-2 hours, cement 22 is pressed into the crack and duct 18 of perforation 17 and cementing concrete to loaded liquid 23
Afterwards.Coiled tubing 6 is transferred, it is made to reach the page intersection of filler liquid 21 and cement 22.Cleaning or replacement liquid storage tank 1,
Slow setting liquid 24 is injected in liquid storage tank 1, and slow setting liquid 24 is pumped into using pump 2 by coiled tubing 6 by the first connecting tube 3
In, it is sprayed from coiled tubing lower end outer nozzle 19, slow setting liquid 24 is sprayed on 19 side of outer nozzle, and side lifts coiled tubing 6 upwards.Lifting
Speed relatively slowly will enable slow setting liquid 24 to be sufficiently mixed with cement 22.To 6 lower end outer nozzle 19 of coiled tubing, reach
When 22 liquid level intersection of loaded liquid 23 and cement, stopping is pumped into slow setting liquid 24.Continue to lift coiled tubing 6, until continuous
The outer nozzle 19 of 6 lower end of oil pipe leaves the upper liquid level of loaded liquid 23, and slow setting liquid 24 is as shown in Figure 5 after injecting.
It waits about 6-10 hours solidifying.
Cleaning or replacement liquid storage tank 1, clear water is added in liquid storage tank 1, opens the valve of coiled tubing 6, by water conservancy pump 2
Water pump is sent into coiled tubing 6, is sprayed from coiled tubing lower end outer nozzle 19, by the cement 22 and various liquid in pit shaft,
Pump 2, and well-flushing repeatedly are closed after replacing into clear water.
The valve opening state on coiled tubing 6 is kept, using coiled tubing 6 and pump 2, water remaining in pit shaft is pumped out
Whole remedial cement crackle work are completed on ground.
Filler liquid 21 is that a kind of density is greater than cement density and has good thixotropic liquid.It can be coagulated after entering well
Form colloidal, support cement 22 and cement 22 is prevented to mix with a large amount of of filler liquid 21, but can divide under external force
Solution is at liquid, convenient for pumping out outside well.Filler liquid 21 is that a kind of salt that thickener, cross-linking compounds and water softener is added is molten
Liquid, it is recommended to use thickener be hydroxy ethyl cellulose, guar polymer, the customary thickeners such as carboxymethyl cellulose are handed over
Join compound such as zirconium oxide, water softener such as ethylenediamine tetra-acetic acid softens.
Loaded liquid 23 can be clear water, it may also be said to be the aqueous solution that thickener is added.
Slow setting liquid 24 is bentonite-borax solution, and the effect of slow setting liquid 24 is to delay cement setting time, is prevented
It is hardened in the wellbore, can not be returned and be ejected out of pit shaft.
Claims (5)
1. a kind of device using coiled tubing repairing cementing concrete crack, it is characterised in that: this to be repaired using coiled tubing
The device in cementing concrete crack includes liquid storage tank (1), pump (2), coiled tubing (6), wellhead blowout preventer (5), gooseneck clamper
(7), outer nozzle (19), packer (14), liquid storage tank (1), pump (2), the platform of coiled tubing roller bearing (4) setting on the ground
On, coiled tubing (6) is wrapped on coiled tubing roller bearing (4), and coiled tubing (6) one end passes through the first connecting tube (3) and pump (2)
Outlet be connected, pump (2) entrance connect liquid storage tank (1)；Goose of the other end of coiled tubing (6) from wellhead blowout preventer (5)
It is protruded into neck clip holder (7) in production tube (12), and its end is threadedly coupled with outer nozzle (19)；Production tube (12) top
It is provided with wellhead blowout preventer (5), gooseneck type clamper (7) setting is internal in wellhead blowout preventer (5)；In production tube (12)
End is provided with mudhole, and mudhole connects the second connecting tube (9), is provided with blowdown valve (10) in the second connecting tube (9)；Packer
(14) it is arranged in annular space of the production tube (12) between lower end and casing；
Utilize the method in the device repairing cementing concrete crack in coiled tubing repairing cementing concrete crack:
The position whether underground cementing concrete (13) have crack and duct and crack and duct is detected first；
According to the position in the crack of the underground cementing concrete of detection and duct (18), it is arranged between production tube (6) and casing
Outer nozzle (19) is extend into casing shoe by adjusting coiled tubing (6) by packer (14), opens pump (2) to coiled tubing
(6) it is pumped into filler liquid (21) in, is injected in pit shaft by outer nozzle (19), as filler liquid (21) liquid level rises, upwards
It lifts coiled tubing (6), filler liquid (21) liquid level is under the pit shaft lowermost end perforating site at 0.5m to 1m, to filler liquid
(21) after the completion of injecting, cement slurry is injected into pit shaft by outer nozzle (19), is higher than highest perforation to cement (22) liquid level
(17) at the 0.3-0.5m of position, stop pumping cement (22)；Loaded liquid (23) are injected into pit shaft by outer nozzle (19) again,
The dosage of loaded liquid (23) is 2 times of cement (22) volume, thus computational load liquid level；
It waits 1-2 hours, after cement (22) are pressed into the crack and duct (18) of perforation and cementing concrete by loaded liquid (23),
Coiled tubing (6) are transferred, outer nozzle (19) reaches the liquid level intersection of filler liquid (21) and cement (22), passes through outer nozzle
(19) slow setting liquid (24) are injected, when outer nozzle (19) sprays slow setting liquid (24), lifts coiled tubing (6) upwards, control lifting
Speed is sufficiently mixed slow setting liquid (24) with cement (22), reaches loaded liquid (23) and cement (22) to outer nozzle (19)
When liquid level intersection, stopping is pumped into slow setting liquid (24)；Continue to lift coiled tubing (6), until outer nozzle (19) leave load
The upper liquid level of liquid (23)；It waits and coagulates 6-10 hours, it, will by coiled tubing (6) and outer nozzle (19) injected clear water into pit shaft
Mixing liquid replacement in pit shaft returns annular space of the mixing liquid between production tube (12) and coiled tubing (6) at clear water
Ground is flow back to, and well-flushing repeatedly, water remaining in pit shaft is then pumped out into ground.
2. the device according to claim 1 using coiled tubing repairing cementing concrete crack, it is characterised in that: described
Pumping (2) is general-purpose centrifugal pump or screw pump.
3. the device repairing cementing concrete crack according to claim 2 using coiled tubing repairing cementing concrete crack
Method, it is characterised in that: the filler liquid (21) is the salting liquid that thickener, cross-linking compounds, water softener is added, close
Degree is greater than the density of cement, into pit shaft after condense into colloidal, support cement (22) simultaneously prevents cement (22) and filler liquid
(21) a large amount of mixing, colloidal resolve into liquid under external force, are aspirated outside discharge well by pump (2)；Thickener is hydroxyl
One of base ethyl cellulose, guar polymer, carboxymethyl cellulose, cross-linking compounds are zirconium oxide, and water softener is second
Ethylenediamine tetraacetic acid (EDTA) softens.
4. the device repairing cementing concrete crack according to claim 3 using coiled tubing repairing cementing concrete crack
Method, it is characterised in that: the loaded liquid (23) is clear water or the aqueous solution that thickener is added.
5. the device repairing cementing concrete crack according to claim 4 using coiled tubing repairing cementing concrete crack
Method, it is characterised in that: the slow setting liquid (24) is bentonite-borax solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075559.5A CN109083631B (en) | 2018-09-14 | 2018-09-14 | Utilize the device and method for repairing and mending in coiled tubing repairing cementing concrete crack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075559.5A CN109083631B (en) | 2018-09-14 | 2018-09-14 | Utilize the device and method for repairing and mending in coiled tubing repairing cementing concrete crack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109083631A CN109083631A (en) | 2018-12-25 |
| CN109083631B true CN109083631B (en) | 2019-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811075559.5A Expired - Fee Related CN109083631B (en) | 2018-09-14 | 2018-09-14 | Utilize the device and method for repairing and mending in coiled tubing repairing cementing concrete crack |
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| CN (1) | CN109083631B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11261695B2 (en) | 2020-06-15 | 2022-03-01 | Saudi Arabian Oil Company | Systems and methods to remove and re-apply sealant on the annular side of casing |
| CN112916528B (en) * | 2021-02-08 | 2023-02-28 | 宁夏振盐鑫盛通工贸有限公司 | A airtight belt cleaning device for oil-water well is restoreed and is maintained |
| CN117189027B (en) * | 2023-11-07 | 2024-02-27 | 中石化西南石油工程有限公司 | Method and device for injecting ash and sealing layer by dragging turbulator by continuous oil pipe |
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| US5323856A (en) * | 1993-03-31 | 1994-06-28 | Halliburton Company | Detecting system and method for oil or gas well |
| CN202202829U (en) * | 2011-07-28 | 2012-04-25 | 南通天华和睿科技创业有限公司 | Continuous oil well tubing device |
| CA2875034A1 (en) * | 2014-12-17 | 2016-06-17 | John L. Allen | Method, system and apparatus for completing and operating non-thermal oil wells in high temperature recovery processes |
| CN106703744A (en) * | 2016-12-06 | 2017-05-24 | 长江大学 | High-pressure-bearing plugging method for fracturing wellhole |
| CN107120093A (en) * | 2017-01-11 | 2017-09-01 | 中石化重庆涪陵页岩气勘探开发有限公司 | With coiled tubing is integrated to the interim capping operation device of horizontal well and application method |
-
2018
- 2018-09-14 CN CN201811075559.5A patent/CN109083631B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5323856A (en) * | 1993-03-31 | 1994-06-28 | Halliburton Company | Detecting system and method for oil or gas well |
| CN202202829U (en) * | 2011-07-28 | 2012-04-25 | 南通天华和睿科技创业有限公司 | Continuous oil well tubing device |
| CA2875034A1 (en) * | 2014-12-17 | 2016-06-17 | John L. Allen | Method, system and apparatus for completing and operating non-thermal oil wells in high temperature recovery processes |
| CN106703744A (en) * | 2016-12-06 | 2017-05-24 | 长江大学 | High-pressure-bearing plugging method for fracturing wellhole |
| CN107120093A (en) * | 2017-01-11 | 2017-09-01 | 中石化重庆涪陵页岩气勘探开发有限公司 | With coiled tubing is integrated to the interim capping operation device of horizontal well and application method |
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