CN105569619A - Abrasive perforating unblocking method and device for coiled tubing - Google Patents
Abrasive perforating unblocking method and device for coiled tubing Download PDFInfo
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- CN105569619A CN105569619A CN201510909648.5A CN201510909648A CN105569619A CN 105569619 A CN105569619 A CN 105569619A CN 201510909648 A CN201510909648 A CN 201510909648A CN 105569619 A CN105569619 A CN 105569619A
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- coiled tubing
- ejector
- abrasive
- perforating
- high pressure
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
Abstract
The invention provides an abrasive perforating unblocking method and device for coiled tubing. The device comprises a liquid tank, a skid-mounted sand mixing unit, high-pressure pumping-in equipment, coiled tubing equipment and an ejector, wherein a sand carrying liquid is stored in the liquid tank, and an input pipe of the skid-mounted sand mixing unit is connected with the liquid tank; an input end of the high-pressure pumping-in equipment is connected with an output pipe of the skid-mounted sand mixing unit; the coiled tubing equipment is wound with the coiled tubing, and a high-pressure inlet of the coiled tubing equipment is connected with an output end of the high-pressure pumping-in equipment through a pipe; the high-pressure inlet is communicated with the coiled tubing; the ejector is connected onto the coiled tubing. According to the unblocking method, the ejector is lowered into a pipe column for operation by the aid of the unblocking device. According to the method and the device, abrasive perforating can be performed on pipe columns with smaller inner diameters, a production channel is communicated, and production of oil-gas wells is recovered.
Description
Technical field
The invention relates to and be a kind ofly communicated with Oil/gas Well for oil field abrasive perforating and produce the device and method of passage, particularly relate to the apparatus and method of coiled tubing abrasive perforating de-plugging of a kind of oil, gas, well production field.
Background technology
In process of production, because the factors such as formation sand production, nearly well band pollution cause production passage to block, oil well output declines Oil/gas Well, needs the current by pass of linking up flow string and sleeve pipe or stratum.And often the flow string of these producing wells is made up of a series of instrument, latus rectum is less, there is reducing.Adopt conventional processing mode, such flow string is taken out oil well, there is very large difficulty, and some band kill jobs have a big risk, whole construction period extends.
Along with the exploitation that agent for improving oilfield recovery is hidden hyposmosis, unconventionaloil pool, the fracturing technique of horizontal well is developed fast, and staged fracturing of horizontal well technology is the important well stimulation of low pressure, Low permeable oil and gas reservoirs exploitation.Because the early investment of horizontal well is large, exploitation is more complicated with process matched therewith, so fractured horizontal well transformation adopts the mode of meticulous pressure break, carries out staged fracturing, separates between layers, improve single well yield to greatest extent to each layer of position.Wherein the multistage sliding sleeve fracturing of fixed tubular column is the wider fracturing technique of current a kind of application, and in fracturing process, often there is the phenomenon of sand plug, fracturing process is caused to interrupt, because fracturing string is with packer and sliding sleeve, caliber is less, once pressure break sand plug occurring follow-up cannot be carried out, routine work cannot complete.Be drained through pressure break ball in journey and cannot return out returning, cause producing passage and block, there is sliding sleeve internal diameter equally too small, routine work cannot process, the problem that Oil/gas Well cannot put into production.
Also have some exceptional wells have an accident in drilling process or manufacturing process, cannot process or process cost too high time, completion or emergent management accident need be shifted to an earlier date, in the urgent need to communication loop passage.Because tubing string is complicated, tubing string internal diameter is too small, there is the situations such as reducing, adopts conventional operation cannot complete completion or the operation operation in later stage.
A kind of three-phase cavitation Abrasive Water Jet Machining device of the prior art, the problem being applied to site operation main is: hybrid mode after device adopts, the use amount of abrasive material limits by the volume of sand tank, can not realize supplying sand continuously, sand regulates Non-follow control than according to site operation discharge capacity, and controllability is poor and have no idea to monitor.Complete equipment is restricted to 50Mpa by maximum pressure, and on-the-spot application is limited.Cutting tool can only be used for imderwater cutting, is not suitable with Oil/gas Well underground work.
A kind of mine abrasive water jet cutting method and device is also there is in prior art, this application of installation to the problem that site operation is main is: can realize coiled tubing mulling, but sand controls than by hand-operated valve, if on-the-spot operational discharge capacity adjustment is frequent, manual adjustments sand is than uncontrollable.Hand-operated valve regulates and is in pressure duct, there is very large risk.Spray gun adapts to ground cutting operation, can not be applicable to underground work.
Thus, the present inventor relies on experience and the practice of being engaged in relevant industries for many years, proposes the apparatus and method of a kind of coiled tubing abrasive perforating de-plugging, to overcome the defect of prior art.
Summary of the invention
The object of the present invention is to provide the apparatus and method of a kind of coiled tubing abrasive perforating de-plugging, abrasive perforating is carried out to flow string, be communicated with and produce passage, recover the production of Oil/gas Well.
The object of the present invention is achieved like this, a kind of coiled tubing abrasive perforating plug-removing device, and the device of described coiled tubing abrasive perforating de-plugging comprises:
Flow container, stores load fluid in described flow container;
Mulling is prized, and the intake pipeline of described mulling sled is connected with described flow container;
High pressure pumping-in equipment, the export pipeline that input and the described mulling of described high pressure pumping-in equipment are prized is connected;
Continuous oil pipe device, described continuous oil pipe device is wound with coiled tubing, and the high pressure entry of described continuous oil pipe device is connected by pipeline with the output of described high pressure pumping-in equipment; Described high pressure entry is communicated with described coiled tubing;
Ejector, described ejector is connected on described coiled tubing.
In a better embodiment of the present invention, described mulling is prized the intake pipeline be connected with described flow container and is provided with switch valve.
In a better embodiment of the present invention, described ejector is connected to the end of described coiled tubing, the linkage section of described ejector is inserted in described coiled tubing, described coiled tubing is formed with a circle shrinkage strain portion around described linkage section, and described linkage section is tightly connected by this shrinkage strain portion and described coiled tubing.
In a better embodiment of the present invention, described shrinkage strain portion is the ring annular groove that roll extrusion is formed; The external diameter of described ejector is identical with the external diameter of described coiled tubing.
In a better embodiment of the present invention, the device of described coiled tubing abrasive perforating de-plugging also comprises injection head, and described injection head lower end connects blowout prevention box, preventer and gate valve successively, and described gate valve is connected on well head;
Described ejector and described coiled tubing extend in tubing string through described injection head, blowout prevention box, preventer and gate valve successively.
In a better embodiment of the present invention, described well head is connected with and returns comb line, described in return comb line connect liquid recovery tank.
Object of the present invention can also realize like this, and a kind of abrasive perforating method for removing blockage adopting coiled tubing abrasive perforating plug-removing device described in above-mentioned any one, described abrasive perforating method for removing blockage comprises the steps:
Step a) arranges flow container, mulling sled, high pressure pumping-in equipment and continuous oil pipe device on ground, described continuous oil pipe device is wound with coiled tubing, and the end of described coiled tubing is connected with ejector;
Step b) in the load fluid of described flow container, add a certain proportion of abrasive material, to form the abrasive suspension mixed by described mulling sled;
Step c) through described high pressure pumping-in equipment, described abrasive suspension is pumped in described coiled tubing;
Steps d) the described ejector that described coiled tubing and end thereof connect is lowered into the position of the shooting point of target well, the described abrasive suspension forming high pressure is transported to described ejector by described coiled tubing, forms high-speed jet Shu Jinhang perforating job by described ejector.
In a better embodiment of the present invention, described step a) in, the linkage section of described ejector is inserted in described coiled tubing, by rolling tools at the ring annular groove formed around roll extrusion on the described coiled tubing of described linkage section, the annular groove of described ejector with described coiled tubing is connected.
In a better embodiment of the present invention, in described steps d) in, before entering described target well under described ejector and described coiled tubing, carry out ground test, progressively increase the discharge capacity of described high pressure pumping-in equipment to 110L/min-160L/min, whether the junction observing described ejector and described coiled tubing has leakage, verification tool parameter, observes jet spray type.
In a better embodiment of the present invention, described steps d) in, after completing perforating job, upper lifting pipe post repeating said steps is a) to described steps d) until complete the perforating job of the predetermined point of all described target wells; After all perforating jobs of described target well complete, carry out trying crowded operation, determine whether perforation tunnel is communicated with.
From the above mentioned, apparatus and method of the present invention mainly contain following advantage:
1) adopt continuous oil pipe operation, oil pipe, multistage fracturing sliding sleeve, inner-diameter changeable pipe post and special small-bore tubing post can be passed and carry out operation.Can adapt to the tubing string that minimum diameter is 32mm, its maximum outside diameter can regulate according to latus rectum in construction operation tubing string, can carry out perforating job, reach the object of communicating passage to conventional oil pipe, sleeve pipe and drilling rod.
2) continuous oil pipe operation adapts to oil, gas, well, is particularly suitable for some high-angle wells and horizontal wells operations.Gas well can carry out Operating Pressure, combines formation institutional operation with gaslift, and be communicated with the laggard promoting the circulation of qi in stratum and lift, well in operation can put into production fast.
3) ejector outside diameter schedule, identical with the external diameter of coiled tubing, improve percent of pass, nozzle life is once gone into the well and can be realized repeatedly abrasive perforating operation.Compared with the abrasive perforating operation of routine work tubing string, have adaptable, by property high.
4) mulling sled in ground can realize continuous sand mixing, by regulating the software of mulling sled, realizes the stability of sand ratio under different displacements, the automatic control of liquid of mixed flow container, while ensureing the discharge capacity demand of high pressure pumping-in equipment, keeps mixed flow container liquid level constant.Volume can be adopted little, and lightweight mulling sled, realize low sand than small displacement operation, the sand ratio of general abrasive perforating operation can be controlled in about 7%.The situation that sand is more uneven than mixing can not be there is, also can not because of the little risk that there is sand plug of discharge capacity.Be particularly suitable for the technique such as abrasive perforating and down-hole abrasive water-jet speed limit circumgyration incision.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1: be the structural representation of coiled tubing abrasive perforating plug-removing device of the present invention.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
Embodiment one
As shown in Figure 1, the invention provides a kind of coiled tubing abrasive perforating plug-removing device, for solving the flow string generation blockage problem occurred in oil, gas, well manufacturing process.This device comprises flow container 1, mulling sled 3, high pressure pumping-in equipment 4, continuous oil pipe device 5 and ejector 14.Mulling sled 3, high pressure pumping-in equipment 4, continuous oil pipe device 5 form ground installation, and mulling sled 3 adopts small-sized mulling sled.Store load fluid in flow container 1, the intake pipeline of mulling sled 3 is connected with flow container 1; The intake pipeline that mulling sled 3 is connected with flow container 1 is also provided with switch valve 2.The export pipeline that input and the mulling of high pressure pumping-in equipment 4 prize 3 is connected.Continuous oil pipe device 5 is wound with coiled tubing 6, continuous oil pipe device 5 adopts union to be connected with coiled tubing 6, and the high pressure entry of continuous oil pipe device 5 is connected by pipeline with the output of high pressure pumping-in equipment 4; And high pressure entry is communicated with coiled tubing 6.Ejector 14 is connected on coiled tubing 6.High pressure pumping-in equipment 4 for by low pressure change into high-pressure abrasive material load fluid containing the even suspension liquid pump of abrasive material after deliver to the high pressure entry of continuous oil pipe device 5, by coiled tubing 6, this high-pressure abrasive material load fluid is transported to ejector 14, ejector 14 enters in down-hole string 13 through oil pipe or sliding sleeve, high-pressure abrasive material load fluid is by forming high-speed jet bundle after ejector 14, the abrasive material high speed impact target tubing string 13 carried, the moment that high-frequency solid abrasive particle contacts with metal pipe-wall collides, produce erosion and grinding, also has water wedge effect simultaneously, accelerate the cutting efficiency of object, abrasive perforating is carried out to target tubing string 13, be communicated with and produce passage, reach or recover the object that Oil/gas Well puts into production.
Further, ejector 14 is connected to the end of coiled tubing 6, and the linkage section of ejector 14 is inserted in coiled tubing 6, and coiled tubing 6 is formed with a circle shrinkage strain portion around linkage section, and linkage section is tightly connected by this shrinkage strain portion and coiled tubing 6.Concrete, the ring annular groove that shrinkage strain portion can be formed for roll extrusion, can make ejector 14 more firm with the connection of coiled tubing 6 by this shrinkage strain portion; The external diameter of ejector 14 is identical with the external diameter of coiled tubing 6.
Further, coiled tubing abrasive perforating plug-removing device also comprises injection head 7, and injection head 7 lower end is threaded connection blowout prevention box 8, preventer 9 and gate valve 10 successively, and gate valve 10 is connected on well head 11.Ejector 14 and coiled tubing 6 extend in tubing string 13 through injection head 7, blowout prevention box 8, preventer 9 and gate valve 10 successively.Well head 11 is connected with and returns comb line 12, returns comb line 12 and connects liquid recovery tank.Gate valve 10 and well head 11, return comb line 12 and adopt Flange joint.Circulation returning fluid in well is discharged to by well head 11 and returns comb line 12 and enter liquid recovery tank.
Mulling sledge 3 of the present invention is prior art, and it is made up of power sledge and mixing sledge two parts.Power sledge is primarily of part compositions such as Diesel engine, cooling fan, hydraulic pump, fuel tanks.Power sledge utilizes Diesel engine to provide hydraulic power to mixing sledge hydraulic motor, provides required power supply to all electrical equipments simultaneously.Mixing sledge is primarily of part compositions such as sand deliverer, agitator, suction pump, excavationg pump, pipe-line systems, the power of mixing sledge all comes from power sledge hydraulic system, utilize fluid motor-driven each several part to operate, realize water inlet, the sediment transport of mixing sledge, be uniformly mixed and the function such as discharge.Mulling sled 3, according to the requirement of site operation discharge capacity, regulates liquid supply rate, regulates amount of sand to realize discharge capacity and the accurate control of sand ratio, meets the backpressure requirements of high pressure pumping-in equipment 4 feed flow simultaneously.
Feature and the advantage of coiled tubing abrasive perforating plug-removing device of the present invention are as follows:
1) the present invention adopts coiled tubing 6 operation, and coiled tubing 6 can pass down-hole oil tube, multistage fracturing sliding sleeve, inner-diameter changeable pipe post and special small-bore tubing post and carry out operation.Coiled tubing 6 can adapt to the tubing string that minimum diameter is 32mm, and its maximum outside diameter can regulate according to latus rectum in construction operation tubing string, can carry out perforating job, reach the object of communicating passage to conventional oil pipe, sleeve pipe and drilling rod.
2) this coiled tubing 6 operation adapts to oil, gas, well, is particularly suitable for some high-angle wells and horizontal wells operations.Gas well can carry out Operating Pressure, combines formation institutional operation with gaslift, and be communicated with the laggard promoting the circulation of qi in stratum and lift, well in operation can put into production fast.
3) ejector 14 external diameter is identical with the external diameter of coiled tubing 6, improves percent of pass, and the nozzle life of ejector 14 is once gone into the well and can be realized repeatedly abrasive perforating operation.Compared with the abrasive perforating operation of routine work tubing string, have adaptable, by property high.
4) the mulling sled 3 on ground can realize continuous sand mixing, by regulating the software of mulling sled 3, realize the stability of sand ratio under different displacements, the automatic control of liquid of flow container 1, while ensureing the discharge capacity demand of high pressure pumping-in equipment 4, keep flow container 1 liquid level constant.Volume can be adopted little, and lightweight mulling sled 3, realize low sand than small displacement operation, the sand ratio of general abrasive perforating operation can be controlled in about 7%.The situation that sand is more uneven than mixing can not be there is, also can not because of the little risk that there is sand plug of discharge capacity.Be particularly suitable for the technique such as abrasive perforating and down-hole abrasive water-jet speed limit circumgyration incision.
Embodiment two
As shown in Figure 1, present invention also offers a kind of abrasive perforating method for removing blockage, the process employs the abrasive perforating plug-removing device of embodiment one, the structure of this abrasive perforating plug-removing device, operating principle and the beneficial aspects reached identical with embodiment one, do not repeat them here.This abrasive perforating method for removing blockage comprises the steps:
Step a) arranges flow container 1, mulling sled 3, high pressure pumping-in equipment 4 and continuous oil pipe device 5 on ground, continuous oil pipe device 5 is wound with coiled tubing 6, the end of coiled tubing 6 is connected with ejector 14.
Step b) in the load fluid of flow container 1, add a certain proportion of abrasive material, to form the abrasive suspension mixed by mulling sled 3.
Step c) through high pressure pumping-in equipment 4, abrasive suspension is pumped in coiled tubing 6.
Steps d) ejector 14 that coiled tubing 6 and end thereof connect is lowered into the position of the shooting point of target well, the abrasive suspension forming high pressure is transported to ejector 14 by coiled tubing 6, forms high-speed jet Shu Jinhang perforating job by ejector 14.
Specifically, step a) in, the linkage section of ejector 14 is inserted in the end of coiled tubing 6, by rolling tools at the ring annular groove formed around roll extrusion on the coiled tubing 6 of linkage section, the annular groove of ejector 14 with coiled tubing 6 is connected, to make ejector 14 more firm with the connection of coiled tubing 6.
In steps d) in, before ejector 14 and coiled tubing are entered target well 6 times, ground test need be carried out, progressively increase the discharge capacity of high pressure pumping-in equipment 4 to working design value, such as 110L/min-160L/min, observe ejector 14 and whether have leakage, verification tool parameter with the junction of coiled tubing 6, observe the jet spray type of ejector 14.
Steps d) in, after completing perforating job, upper lifting pipe post repeats step a) to steps d) until complete the perforating job of the predetermined point of all target wells; After all perforating jobs of target well complete, carry out trying crowded operation, determine whether perforation tunnel is communicated with.
As a specific embodiment, the processing step of this abrasive perforating method for removing blockage is as follows:
1) first confirm tubing string 13 combined situation of target well, confirm the position of the shooting point of target well, the tubing string 13 on shooting point guarantees do not have sand or other obstruction, carries out sand washing operation according to field condition.
2) flow container 1 needed to prepare applicable construction operation load fluid before construction, calculated volume and the concentration of load fluid in operation, ensured that in construction operation load fluid has and good took sand effect.
3) connect the small-sized mulling sled 3 in ground, high pressure pumping-in equipment 4, continuous oil pipe device 5 successively, return the ground installations such as comb line 12, liquid recovery tank.The parameter of adjustment mulling sled 3, according to the displacement requirements at scene, debugging sand ratio; Injection head 7 is installed, blowout prevention box 8 is with preventer 9 and carries out voltage-withstand test.
4) expansion process is repaiied to ensure sealing to coiled tubing 6 end, tube head crushed element is cut one section, repair expansion instrument with endoporus and carry out endoporus process, remove the welding muscle in hole, after removing detritus, the linkage section of ejector 14 is inserted in coiled tubing 6, carry out roll extrusion by rolling tools in set mark and form a ring annular groove, during roll extrusion, notice that the depth of cut wants little and even.Ejector 14 is connected by annular groove with coiled tubing 6, and ensures sealing and bonding strength.
5), before instrument is gone into the well, a ground test (after the connection completing ejector 14 and coiled tubing 6, carrying out through before injection head 7) is carried out.The tube head of fixing coiled tubing 6, carry out safe precaution measure, after guaranteeing that stable circulation, pipeline are unimpeded, progressively increase high pressure pumping-in equipment 4 discharge capacity to working design value, such as 110L/min-160L/min, observe ejector 14 and have leakproof, verification tool parameter with the junction of coiled tubing 6, observe spray type.
6) coiled tubing 6 is with ejector 14 to enter well through injection head 7, blowout prevention box 8, preventer 9, controls to enter instrument at the uniform velocity down with 15m/min-20m/min, arrives target shooting point and completes abrasive perforating operation; After completing perforating job, upper lifting pipe post repeats above step until complete the perforating job of the predetermined point of all target wells; After all perforating jobs of target well complete, carry out trying crowded operation, determine whether perforation tunnel is communicated with.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.
Claims (10)
1. a coiled tubing abrasive perforating plug-removing device, is characterized in that, the device of described coiled tubing abrasive perforating de-plugging comprises:
Flow container, stores load fluid in described flow container;
Mulling is prized, and the intake pipeline of described mulling sled is connected with described flow container;
High pressure pumping-in equipment, the export pipeline that input and the described mulling of described high pressure pumping-in equipment are prized is connected;
Continuous oil pipe device, described continuous oil pipe device is wound with coiled tubing, and the high pressure entry of described continuous oil pipe device is connected by pipeline with the output of described high pressure pumping-in equipment; Described high pressure entry is communicated with described coiled tubing;
Ejector, described ejector is connected on described coiled tubing.
2. coiled tubing abrasive perforating plug-removing device as claimed in claim 1, it is characterized in that, described mulling is prized the intake pipeline be connected with described flow container and is provided with switch valve.
3. coiled tubing abrasive perforating plug-removing device as claimed in claim 1, it is characterized in that, described ejector is connected to the end of described coiled tubing, the linkage section of described ejector is inserted in described coiled tubing, described coiled tubing is formed with a circle shrinkage strain portion around described linkage section, and described linkage section is tightly connected by this shrinkage strain portion and described coiled tubing.
4. coiled tubing abrasive perforating plug-removing device as claimed in claim 3, is characterized in that, described shrinkage strain portion is the ring annular groove that roll extrusion is formed; The external diameter of described ejector is identical with the external diameter of described coiled tubing.
5. coiled tubing abrasive perforating plug-removing device as claimed in claim 1, it is characterized in that, the device of described coiled tubing abrasive perforating de-plugging also comprises injection head, and described injection head lower end connects blowout prevention box, preventer and gate valve successively, and described gate valve is connected on well head;
Described ejector and described coiled tubing extend in tubing string through described injection head, blowout prevention box, preventer and gate valve successively.
6. coiled tubing abrasive perforating plug-removing device as claimed in claim 5, it is characterized in that, described well head is connected with and returns comb line, described in return comb line and connect liquid recovery tank.
7. adopt an abrasive perforating method for removing blockage for the coiled tubing abrasive perforating plug-removing device any one of the claims 1-6 described in claim, it is characterized in that, described abrasive perforating method for removing blockage comprises the steps:
Step a) arranges flow container, mulling sled, high pressure pumping-in equipment and continuous oil pipe device on ground, described continuous oil pipe device is wound with coiled tubing, and the end of described coiled tubing is connected with ejector;
Step b) in the load fluid of described flow container, add a certain proportion of abrasive material, to form the abrasive suspension mixed by described mulling sled;
Step c) through described high pressure pumping-in equipment, described abrasive suspension is pumped in described coiled tubing;
Steps d) the described ejector that described coiled tubing and end thereof connect is lowered into the position of the shooting point of target well, the described abrasive suspension forming high pressure is transported to described ejector by described coiled tubing, forms high-speed jet Shu Jinhang perforating job by described ejector.
8. abrasive perforating method for removing blockage as claimed in claim 7, it is characterized in that, described step a) in, the linkage section of described ejector is inserted in described coiled tubing, by rolling tools at the ring annular groove formed around roll extrusion on the described coiled tubing of described linkage section, the annular groove of described ejector with described coiled tubing is connected.
9. abrasive perforating method for removing blockage as claimed in claim 7, it is characterized in that, in described steps d) in, before entering described target well under described ejector and described coiled tubing, carry out ground test, the discharge capacity progressively increasing described high pressure pumping-in equipment is to 110L/min-160L/min, and whether the junction observing described ejector and described coiled tubing has leakage, verification tool parameter, observes jet spray type.
10. abrasive perforating method for removing blockage as claimed in claim 8, it is characterized in that, described steps d) in, after completing perforating job, upper lifting pipe post repeating said steps is a) to described steps d) until complete the perforating job of the predetermined point of all described target wells; After all perforating jobs of described target well complete, carry out trying crowded operation, determine whether perforation tunnel is communicated with.
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| CN201510909648.5A CN105569619A (en) | 2015-12-10 | 2015-12-10 | Abrasive perforating unblocking method and device for coiled tubing |
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| CN201510909648.5A CN105569619A (en) | 2015-12-10 | 2015-12-10 | Abrasive perforating unblocking method and device for coiled tubing |
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| CN106639997A (en) * | 2016-12-05 | 2017-05-10 | 泰尔达能源科技（北京）有限公司 | Device and method for reducing viscosity of coiled tubing high pressure water jet agent thick oil |
| CN107992642A (en) * | 2017-10-20 | 2018-05-04 | 中国石油天然气集团公司 | Take the Forecasting Methodology and device of liquid critical flow velocity |
| CN108425661A (en) * | 2018-04-16 | 2018-08-21 | 中国石油大学(华东) | Coiled tubing steel grit jet stream perforating system |
| CN109281628A (en) * | 2018-10-09 | 2019-01-29 | 中国石油大学(华东) | Coiled tubing abrasive grain jet stream plugging removal and stimulation device |
| CN111380763A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Test system for abrasive water jet |
| CN111472742A (en) * | 2020-05-28 | 2020-07-31 | 美国杰瑞国际有限公司 | Novel sand mixing equipment |
| CN114749932A (en) * | 2022-04-21 | 2022-07-15 | 江苏大学 | Cavitation-assisted milling device and method |
| CN115405272A (en) * | 2022-04-27 | 2022-11-29 | 普斐特油气工程(江苏)股份有限公司 | Oil gas well head intelligence bubble row system with automatic mediation function easy to overhaul |
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