CN107476773A - The tool string and method of obstacle in a kind of elimination well - Google Patents
The tool string and method of obstacle in a kind of elimination well Download PDFInfo
- Publication number
- CN107476773A CN107476773A CN201710733297.6A CN201710733297A CN107476773A CN 107476773 A CN107476773 A CN 107476773A CN 201710733297 A CN201710733297 A CN 201710733297A CN 107476773 A CN107476773 A CN 107476773A
- Authority
- CN
- China
- Prior art keywords
- milling
- well
- tool string
- obstacle
- battery pack
- 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.)
- Pending
Links
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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
-
- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/002—Destroying the objects to be fished, e.g. by explosive means
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Abstract
The invention provides a kind of tool string and method for eliminating obstacle in well, joint that tool string includes being sequentially connected in series from top to bottom, ball-and-seat, centralizer one, battery pack short circuit, centralizer two, motor, speed-regulating switch, chip recovery cylinder, safety are given up, centralizer three and milling instrument；The speed-regulating switch, motor and milling instrument are sequentially connected electrically, and motor and milling instrument electrically connect with battery pack short circuit respectively.The present invention provides set milling by battery pack, bores mill power, realizes that milling flow controller etc. excludes obstacle in pit shaft（Junk）Purpose.Compared with prior art, it is not necessary to which the cooperation of a variety of large scale equipments such as pump truck, water-tank lorry, water treatment facilities, it is convenient to organize and implement, and cost is low, and the problems such as well causes discharge opeing to reproduce difficulty, waste water resource, big sewage disposal difficulty is also largely entered in the absence of liquid.
Description
Technical field
The invention belongs to petroleum works underground work technical field, and in particular to a kind of method for eliminating obstacle in well.
Background technology
More oil gas field domestic at present on stream, in order to reduce development cost, realizes gas well stable yields, during exploitation
The various instruments of input in well, after prolonged work, there is the problem of being difficult to salvage in instrument in well, causes obstacle increase in well,
Influence the normal exploitation of oil well.Particularly initial stage of development launches underground throttle device in gas well, as Development life increases, gas well
Production capacity declines, it is necessary to take out flow controller adjustment working system, or need to take out flow controller development test jobs acquisition gas field development
The creation data needed, occur when flow controller is salvaged fishing neck break, shake out it is serious cause sand bury or produce to the later stage because
Having foreign matter to fail to grip with pit shaft the situation for causing normally to salvage such as can not unseal after flow controller, packing element aging.It is universal at present
Way is to change flow controller institute card tubing string by workover treatment, and well workover process duration is long, is reproduced after costly, kill-job operation
It is difficult（Especially low permeability gas field）, it is impossible to meet gas field economical and effective exploitation needs.Another solution method is using continuous oil
Pipe tripping in screw motor clears up flow controller in a manner of waterpower bores mill, and this method is lower than changing tubing string operating cost, but organization of production
Complexity, equally exist liquid and enter the problem of reproducing difficulty after well, do not put into field application at present.
The content of the invention
The purpose of the present invention is to overcome the problem of barrier is difficult to salvage in Oil/gas Well.
Therefore, the invention provides it is a kind of eliminate well in obstacle tool string, including be sequentially connected in series from top to bottom joint,
Ball-and-seat, centralizer one, battery pack short circuit, centralizer two, motor, speed-regulating switch, chip recovery cylinder, safety are given up, centralizer
Three and milling instrument；
The speed-regulating switch, motor and milling instrument are sequentially connected electrically, and motor and milling instrument are electrically connected with battery pack short circuit respectively
Connect.
The battery pack short circuit is composed in series by multiple lithium batteries.
The method of obstacle, comprises the following steps in a kind of elimination well：
Step 1, borehole wall debris is removed, keep well unimpeded；
Step 2, the joint on tool string is connected to coiled tubing end, by coiled tubing by tool string G.I.H extremely
From 3~5m of barrier, turn on pump 25~35min of circulation well cleanup, then rotate and transfer tool string to apart from barrier 0.25~
At 0.35m, top of fish is rinsed, tool string is above carried and then transfers and rinse top of fish, is repeated 2~3 times；
Step 3, termination of pumping, 1~2m of tool string is above carried, after well head does not return out drilling fluid, then transfer tool string and make milling instrument
On junk mill push down barrier, turn on pump circulation well cleanup and milling；Per 25~35min of milling, repeat termination of pumping, raise and decentralize work
Have string, circulation well cleanup, milling several times, until returning out or being pumped rising without iron filings, you can pull out of hole.
Drilling fluid outlet groove is installed at the well head, magnetic is placed with drilling fluid outlet groove.
The set milling parameter of the milling instrument of the step 3 is the pressure of the drill 5kN~50kN, the r/min of rotating speed 30r/min~60,
Milling size 0.3m~0.5m is covered, set milling is once to complete.
The milling parameter of the milling instrument of the step 3 is the pressure of the drill 5kN~50kN, the r/min of rotating speed 20r/min~70,
80% when discharge capacity is creeps into.
Beneficial effects of the present invention：This tool string and method for eliminating obstacle in well provided by the invention, it is particularly suitable
In low permeability gas field gas well underground throttle device because fishing neck is broken, shaking out seriously causes sand to bury or produce to the later stage because in pit shaft
Having foreign matter to fail to grip with can not unseal after flow controller, packing element aging etc. when causing normally to salvage, and pass through coiled tubing band and cover milling
Cylinder, milling-grinding shoe form battery pack using reserve battery short circuit and provide underground set milling, bore mill power, realize to wellbore clean to save
Flow device to salvage, milling flow controller or flow controller nubbin, reach and exclude obstacle in pit shaft（Junk）A kind of technique.The present invention
Set milling is provided by battery pack, bores mill power, realizes that milling flow controller etc. excludes obstacle in pit shaft（Junk）Purpose.With it is existing
Technology is compared, it is not necessary to which the cooperation of a variety of large scale equipments such as pump truck, water-tank lorry, water treatment facilities, it is convenient to organize and implement, cost
It is low, the problems such as well causes discharge opeing to reproduce difficulty, waste water resource, big sewage disposal difficulty is also largely entered in the absence of liquid.
The present invention is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation for eliminating the tool string of obstacle in well.
Fig. 2 is the flow chart for eliminating the method for obstacle in well.
Description of reference numerals：1st, coiled tubing；2nd, joint；3rd, ball-and-seat；4th, centralizer one；5th, battery pack short circuit；6th, help
Positive device two；7th, motor；8th, speed-regulating switch；9th, chip recovery cylinder；10th, safety is given up；11st, centralizer three；12nd, milling instrument.
Embodiment
Embodiment 1：
In order to overcome the problem of barrier is difficult to salvage in Oil/gas Well, a kind of instrument for eliminating obstacle in well is present embodiments provided
String, as shown in figure 1, including the joint 2, ball-and-seat 3, centralizer 1, battery pack short circuit 5, the centralizer that are sequentially connected in series from top to bottom
26, motor 7, speed-regulating switch 8, chip recovery cylinder 9, safe give up 10, centralizer 3 11 and milling instrument 12；The speed governing is opened
Close 8, motor 7 and milling instrument 12 is sequentially connected electrically, motor 7 and milling instrument 12 electrically connect with battery pack short circuit 5 respectively.
The operation principle of the tool string of obstacle is in the elimination well that the present embodiment provides：
Joint 2 is connected to the end of coiled tubing 1, tool string is with the G.I.H of coiled tubing 1, when encountering barrier in well,
The switch of battery pack short circuit 5 is pressed by the borehole wall or barrier, battery pack short circuit 5 is opened and provides power to milling instrument 12
With motor 7, motor 7 supplies power to milling instrument 12, and milling instrument 12 carries out milling to barrier；, wherein it is desired to explanation
It is that speed-regulating switch 8 is according to the rotating speed of barrier regulation motor 7, so as to control the milling rotating speed of milling instrument 12；Chip recovery cylinder
9 are used for reclaiming the various drilling cuttings such as the iron filings that are got off by the milling of milling instrument 12.
In the present embodiment, motor 7 selects small volume and large torque motor.Unlike the prior art, the present embodiment is adopted
The mode connected with battery gives milling powered tools, and milling is covered in a manner of electronic, bores barrier in mill well, finally by milling
Drilling cuttings anti-row come up, and it is existing use coiled tubing tripping in screw motor by waterpower brill mill in a manner of clear up flow controller, pass through
Cable is powered to screw motor, and organization of production is complicated, while liquid is present and entered the problem of reproducing difficulty after well.Meanwhile this implementation
Example can also clear up other junks in addition to it can clear up low permeability gas field gas well underground throttle device.
The present invention provides set milling by battery pack, bores mill power, realizes that milling flow controller etc. excludes obstacle in pit shaft（Fall
Thing）Purpose.Compared with prior art, it is not necessary to the cooperation of a variety of large scale equipments such as pump truck, water-tank lorry, water treatment facilities, group
Knit easy to implement, cost is low, and well is also largely entered in the absence of liquid, and to cause discharge opeing to reproduce difficulty, waste water resource, sewage disposal difficult
Spend the problems such as big.
Embodiment 2：
On the basis of embodiment 1, the battery pack short circuit 5 is composed in series by multiple lithium batteries., can basis in practical application
The battery short circuit of required power selection suitable length bores milling requirement to reach.
Embodiment 3：
A kind of method for eliminating obstacle in well is present embodiments provided, as shown in Fig. 2 comprising the following steps：
Step 1, borehole wall debris is removed, keep well unimpeded；
Step 2, the joint 2 on tool string is connected to the end of coiled tubing 1, by coiled tubing 1 by tool string G.I.H
To from 3~5m of barrier, turn on pump 25~35min of circulation well cleanup, then rotate and transfer tool string to apart from barrier 0.25~
At 0.35m, top of fish is rinsed, tool string is above carried and then transfers and rinse top of fish, is repeated 2~3 times；
Step 3, termination of pumping, 1~2m of tool string is above carried, after well head does not return out drilling fluid, then transfer tool string and make milling instrument
Junk mill on 12 pushes down barrier, turn on pump circulation well cleanup and milling；Per 25~35min of milling, repeat termination of pumping, raise and decentralize
Tool string, circulation well cleanup, milling several times, until return out or be pumped rising without iron filings, you can trip-out.
It should be noted that send brill equal during boring milling；When finding to slow in milling, drilling tool can be above carried, makes mill
Footwear leave barrier 0.2m-0.5m, lower 1 time -2 times（Power of pausing is not more than 30kN）After continue milling, no iron filings are returned out or are pumped
Rise, you can pull out of hole.Rise when being drilled into casing shoe, should slow down it is slow rise, hung with anti-collision.
Embodiment 4：
On the basis of embodiment 3, drilling fluid outlet groove is installed at the well head, magnetic is placed with drilling fluid outlet groove.
Magnetic can adsorb the iron filings brought up by tool string, timely processing drilling cuttings.
Embodiment 5：
On the basis of embodiment 3, the set milling parameter of the milling instrument 12 of the step 3 is the pressure of the drill 5kN~50kN, rotating speed
The r/min of 30r/min~60, covers milling size 0.3m~0.5m, and set milling can not above carry drilling tool halfway once to complete.The pressure of the drill, row
Amount should be varied from according to the of different sizes of casing section mill/milling shoe size, and discharge capacity should be not less than drilling discharge capacity；
The milling parameter of the milling instrument 12 of the step 3 is the pressure of the drill 5kN~50kN, the r/min of rotating speed 20r/min~70, row
Measure 80% during to creep into.
The present invention can remove the processing of obstacle in pit shaft, particularly low permeability gas field gas well underground throttle device, by continuous
Oil pipe band casing section mill, milling-grinding shoe form the set milling of battery pack offer underground using reserve battery short circuit, bore mill power, realize to pit shaft
Cleaning is salvaged so as to flow controller, milling flow controller or flow controller nubbin, is reached and is excluded obstacle in pit shaft（Junk）One kind
Technique.
It is exemplified as above be only to the present invention for example, do not form the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.The portion that the present embodiment does not describe in detail
The well-known components and common structure or conventional means of part and the structure category industry, are not described one by one here.
Claims (6)
- A kind of 1. tool string for eliminating obstacle in well, it is characterised in that：Including the joint being sequentially connected in series from top to bottom（2）, single current Valve（3）, centralizer one（4）, battery pack short circuit（5）, centralizer two（6）, motor（7）, speed-regulating switch（8）, chip recovery cylinder （9）, safety give up（10）, centralizer three（11）With milling instrument（12）；The speed-regulating switch（8）, motor（7）With milling instrument（12）It is sequentially connected electrically, motor（7）With milling instrument（12）Respectively With battery pack short circuit（5）Electrical connection.
- 2. the tool string of obstacle in well is eliminated as claimed in claim 1, it is characterised in that：The battery pack short circuit（5）By more Individual lithium battery is composed in series.
- A kind of 3. method for eliminating obstacle in well as described in any claim in claim 1~2, it is characterised in that bag Include following steps：Step 1, borehole wall debris is removed, keep well unimpeded；Step 2, by the joint on tool string（2）It is connected to coiled tubing（1）End, pass through coiled tubing（1）By under tool string Enter in well to from 3~5m of barrier, turn on pump 25~35min of circulation well cleanup, then rotate and transfer tool string to apart from barrier At 0.25~0.35m, top of fish is rinsed, tool string is above carried and then transfers and rinse top of fish, is repeated 2~3 times；Step 3, termination of pumping, 1~2m of tool string is above carried, after well head does not return out drilling fluid, then transfer tool string and make milling instrument （12）On junk mill push down barrier, turn on pump circulation well cleanup and milling；Per milling 25~35min, repeat termination of pumping, above carry and under Tool string, circulation well cleanup, milling are put several times, until returning out or being pumped rising without iron filings, you can pull out of hole.
- 4. the tool string of obstacle in well is eliminated as claimed in claim 3, it is characterised in that：Drilling fluid is installed at the well head Mouthful groove, magnetic is placed with drilling fluid outlet groove.
- 5. the tool string of obstacle in well is eliminated as claimed in claim 3, it is characterised in that：The milling instrument of the step 3 （12）Set milling parameter be the pressure of the drill 5kN~50kN, the r/min of rotating speed 30r/min~60, cover milling size 0.3m~0.5m, set milling is Once complete.
- 6. the tool string of obstacle in well is eliminated as claimed in claim 3, it is characterised in that：The milling instrument of the step 3 （12）Milling parameter be the pressure of the drill 5kN~50kN, the r/min of rotating speed 20r/min~70, discharge capacity for drilling when 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710733297.6A CN107476773A (en) | 2017-08-24 | 2017-08-24 | The tool string and method of obstacle in a kind of elimination well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710733297.6A CN107476773A (en) | 2017-08-24 | 2017-08-24 | The tool string and method of obstacle in a kind of elimination well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107476773A true CN107476773A (en) | 2017-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710733297.6A Pending CN107476773A (en) | 2017-08-24 | 2017-08-24 | The tool string and method of obstacle in a kind of elimination well |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339751A (en) * | 2018-10-19 | 2019-02-15 | 中国石油天然气股份有限公司 | It is a kind of easily to bore formula composite throttling device and application method |
| CN110725672A (en) * | 2019-09-16 | 2020-01-24 | 中国石油天然气股份有限公司 | Coiled tubing relieving choke and drainage gas production integrated pipe column and using method |
| CN112343534A (en) * | 2019-08-07 | 2021-02-09 | 中国石油化工股份有限公司 | Drilling-out tool and drilling-out method |
| CN113669030A (en) * | 2021-08-16 | 2021-11-19 | 朱梦钦 | Be applied to iron fillings adsorption equipment of production logging in-process |
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| CN106894783A (en) * | 2015-12-18 | 2017-06-27 | 中国石油天然气股份有限公司 | The method of continuous tubing drill milling tamper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339751A (en) * | 2018-10-19 | 2019-02-15 | 中国石油天然气股份有限公司 | It is a kind of easily to bore formula composite throttling device and application method |
| CN112343534A (en) * | 2019-08-07 | 2021-02-09 | 中国石油化工股份有限公司 | Drilling-out tool and drilling-out method |
| CN110725672A (en) * | 2019-09-16 | 2020-01-24 | 中国石油天然气股份有限公司 | Coiled tubing relieving choke and drainage gas production integrated pipe column and using method |
| CN113669030A (en) * | 2021-08-16 | 2021-11-19 | 朱梦钦 | Be applied to iron fillings adsorption equipment of production logging in-process |
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Application publication date: 20171215 |
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