CN109667558A - A kind of continuous pipe old street district method - Google Patents
A kind of continuous pipe old street district method Download PDFInfo
- Publication number
- CN109667558A CN109667558A CN201811592769.1A CN201811592769A CN109667558A CN 109667558 A CN109667558 A CN 109667558A CN 201811592769 A CN201811592769 A CN 201811592769A CN 109667558 A CN109667558 A CN 109667558A
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- China
- Prior art keywords
- windowing
- drilling
- tool
- continuous pipe
- casing
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 51
- 238000003801 milling Methods 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 210000000664 rectum Anatomy 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 5
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 241000283986 Lepus Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011981 development test Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer 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
- E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to oily areas to develop drilling technique field, and in particular to a kind of continuous pipe old street district method includes the following steps: 1) to carry out latus rectum pipe cleaning to the casing of old well until the sundries of casing wall is cleaned out；2) it opens a window in the casing after step 1) cleaning；When the windowing, firstly, according to the selection principle selection windowing position of windowing position；Then window opening tool tripping in windowing position and is subjected to milling windowing；3) tripping in drilling drill assembly creeps into the old well after step 2 windowing；Sand difficulty is taken when solving continuous pipe old street district, frictional resistance is big, and blocked portion is serious, low efficiency of spudding in and safety difference problem, and not portable sand, frictional resistance are small when with drilling, and blocked portion is small, improves spud in efficiency and safety.
Description
Technical field
The invention belongs to oily areas to develop drilling technique field, and in particular to a kind of continuous pipe old street district method.
Background technique
With the Persisting exploitation in oil field, oily area's low yield inefficient well, length stops well, casing damaged well quantity increases year by year, to oil field
Continuously steady production proposes great test, and old well in large scale needs increase production to reproduce improvement.Utilize old street district technology
It redevelops to oil reservoir, has and extend old well service life, restore to improve well pattern, improve the outstanding advantages such as recovery ratio,
It is the effective means realizing remaining reserves and employing.It is compared with conventional encryption development technique, old street district technology both can be frugally
The expenses such as face construction, improve comprehensive benefit；Land acquisition can be saved again, reduces ecological environment destruction and pollution risk, significantly
Alleviate current expropriation of land, environmental protection pressure.Currently, 2-7/8 〞 drilling rod conventional drilling technologies that 5-1/2 〞 casing old street districts use
Comparative maturity continuously manages old well window sidetracking in the development test stage, has tested 5 mouthfuls of wells or more.
The continuous pipe old street district design of 5-1/2 〞 casings: main contents include coordinative composition of equipments, well track design, drill bit
The contents such as design, hole assembly design and technical measures；It is open a window design, Trajectory Design, brill in place of the deficiencies in the prior art
Substantially using 7/8 〞 drilling rod routine sidetracking drilling technology of 2-, drill assembly only changes continuous pipe for head design, technical measures
Crossover sub tool below, does not take measures on continuous pipe and the prior art takes sand difficulty when spudding in, and frictional resistance is big, and blocked portion is tight
Weight, low efficiency of spudding in, safety are poor.
Summary of the invention
Continuous pipe old street district method purpose provided by the invention is first is that when overcoming continuous pipe old street district in the prior art
Sand difficulty is taken, frictional resistance is big, and blocked portion is serious, low efficiency of spudding in and safety difference problem；Purpose opens a window in the prior art second is that overcoming
Design, Trajectory Design, drill bit design, technical measures are substantially using 7/8 〞 drilling rod routine sidetracking drilling technology of 2-, drill set
Conjunction only changes continuous pipe crossover sub tool below, the problem of not taking measures on continuous pipe.
For this purpose, including the following steps: the present invention provides a kind of continuous pipe old street district method
1) latus rectum pipe cleaning is carried out to the casing of old well until the sundries of casing wall is cleaned out；
2) it opens a window in the casing after step 1) cleaning；When the windowing, firstly, being selected according to the selection principle of windowing position
Select windowing position；Then window opening tool tripping in windowing position and is subjected to milling windowing；
3) tripping in drilling drill assembly creeps into the old well after step 2 windowing.
The window opening tool includes continuous pipe, the first connector, about the first non-rotating connector, the first releasing tool, spiral shell
Bar, windowing milling shoe and whipstock, continuous pipe, the first connector, about the first non-rotating connector, the first releasing tool, screw rod and
Windowing junk mill is sequentially connected from up to down, and whipstock seat is hung in casing.
The windowing milling shoe uses the milling shoe of flat.
The drilling drill assembly is given up including at least drill bit, single bend PDM, measurement while drilling tool, directional orientation tool, second
Tool, hydroscillator, about the second non-rotating connector and the second connector, drill bit, measurement while drilling tool, are determined single bend PDM
To tool, the second releasing tool, hydroscillator, about the second non-rotating connector and the second connector is bottom-up successively connects
It connects.
The drilling drill assembly further includes spiral roller centralizer, and spiral roller centralizer connects the second connector.
The wellbore trajectory section that the drilling drill assembly is selected is straight-increasing-drop section.
For the drilling assembly when being crept into, every 100 meters of drilling needs spudding up and down primary.
The selection principle of the windowing position be the intact well section of selection casing, avoid casing coupling, cementing quality it is good,
Formation hardness is moderate, cement returns height or less 50m, avoids easy blowby stratum and avoids bad ground.
The good cement bond appraisal figure measured of being subject to of the cementing quality；Formation hardness is moderate to require the well radius variations rate to be
10%-50%。
Beneficial effects of the present invention: this continuous pipe old street district method provided by the invention uses special window milling
Shoes, the characteristics of making full use of casing program, use spiral roller centralizer and hydroscillator in tool string, effective to expand
The characteristics of the characteristics of using special window opening tool, casing program, spiral roller centralizer and hydroscillator, it is tired that sand is taken in solution
Difficulty, frictional resistance is big, and the serious problem of blocked portion improves the high efficiency and safety of continuous pipe old street district.
Detailed description of the invention
The present invention is described in further details below with reference to attached drawing.
Fig. 1 is window opening tool schematic diagram；
Fig. 2 is wellbore trajectory diagrammatic cross-section；
Fig. 3 is drilling drill assembly partial structure diagram.
Description of symbols: 1, continuous pipe；2, the first connector；3, about the first non-rotating connector；4, it first gives up work
Tool；5, screw rod；6, open a window milling shoe；7, whipstock；8, drill bit；9, hydroscillator；10, spiral roller centralizer.
Specific embodiment
Embodiment 1:
A kind of continuous pipe old street district method, includes the following steps:
1) latus rectum pipe cleaning is carried out to the casing of old well until the sundries of casing wall is cleaned out；
2) it opens a window in the casing after step 1) cleaning；When the windowing, firstly, being selected according to the selection principle of windowing position
Select windowing position；Then window opening tool tripping in windowing position and is subjected to milling windowing；
3) tripping in drilling drill assembly creeps into the old well after step 2 windowing.
Embodiment 2
As shown in Figure 1-3, a kind of continuous pipe old street district method, includes the following steps:
1) latus rectum pipe cleaning is carried out to the casing of old well until the sundries of casing wall is cleaned out；φ 118mm is selected when latus rectum pipe cleaning
The continuous pipe dredging, scraping wall of jack rabbit+GX-T140+, 10m scraping casing 10 times repeatedly above and below window point position, to clear up set
The cement and sundries of tube wall, to guarantee that whipstock 7 is setting firm.
2) it opens a window in the casing after step 1) cleaning；When the windowing, firstly, former according to the selection of windowing position
Then select windowing position；Then window opening tool tripping in windowing position and is subjected to milling windowing；As operation is wanted under window opening tool
Steadily, strict control lowering velocity is forbidden to stop suddenly and be put suddenly, be hampered will slowly movable drilling tool, cannot press and mention firmly firmly, with pre- anti-oblique
Sit extension in advance to device.
3) tripping in drilling drill assembly creeps into the old well after step 2 windowing.
This continuous pipe old street district method provided by the invention makes full use of well bore to cut open using special windowing milling shoe
The characteristics of face, uses spiral roller centralizer and hydroscillator in tool string, efficiently uses special windowing work to expand
Sand difficulty is taken in the characteristics of the characteristics of tool, casing program, spiral roller centralizer and hydroscillator, solution, and frictional resistance is big, and blocked portion is tight
The problem of weight, improves the high efficiency and safety of continuous pipe old street district.
The window opening tool includes continuous pipe 1, the first connector 2, about the first non-rotating connector 3, the first releasing tool
4, screw rod 5, windowing milling shoe 6 and whipstock 7, continuous pipe 1, the first connector 2, about the first non-rotating connector 3, first are given up work
Tool 4, screw rod 5 and windowing junk mill 6 are sequentially connected from up to down, and the seat of whipstock 7 is hung in casing.The junk mill 6 that opens a window is for milling
Casing, screw rod 5 are that rotary power is provided by fluid power, and the first releasing tool 4 is after preventing generation accident, to realize upper down tube
The separation of string, about the first non-rotating connector are the contact surfaces that tool and stratum are raised by the increase of outer diameter, reduce frictional resistance,
First connector is to realize upper and lower connection by the conversion of button-type.
The windowing milling shoe 6 uses the milling shoe of flat.Window opening tool is not to standardize very much at present, mainly based on tapered, mill
It is very slow to stratum, mill milling speed can be improved using the milling shoe of the flat of flat.
As shown in figure 3, the drilling drill assembly includes at least drill bit 8, single bend PDM, measurement while drilling tool, orientation work
Tool, the second releasing tool, hydroscillator 9, about the second non-rotating connector and the second connector, drill bit 8, single bend PDM, with
Bore measuring tool, directional orientation tool, the second releasing tool, hydroscillator 9, about the second non-rotating connector and the second connector certainly
It is sequentially connected upwards down.Fig. 3 only designates drill bit 8, hydroscillator 9 and spiral roller centralizer 10, remaining tool does not exist
It is marked in figure, drill bit 8 bores stratum, and drill bit bores stratum, preferably large torque, long-life screw rod, improves screw rod strong
Degree and service life, while it being directed to the special individuality drill bit of the preferred strong applicability of different zones strata condition, realize sidetracked hole naked eye
The target of a time brill of section, measurement while drilling tool are the instruments that hole deviation and orientation are measured in drilling tool, and directional orientation tool is by opening
Slush pump is closed to realize the bending direction for adjusting downhole tool, realizes the trend of wellbore, measurement while drilling tool and directional orientation tool can
Improve the precision of probing；Hydroscillator 9 is shorted the cyclically-varying of Fluid pressure by hydroscillator, acts on short circuit
Inherent spring, due to pressure when it is big when it is small, piston causes short joint-shaft back and forth to be transported upwards under the double action of pressure and spring
It is dynamic, the viscous card of the static bring of drilling tool is prevented, is easy to travel forward.
The drilling drill assembly further includes spiral roller centralizer 10, second connection of the connection of spiral roller centralizer 10
Device.Spiral roller centralizer changes the fluidised form of drilling fluid using helical flow path, plays suspension drilling cuttings and takes the purpose of bits, reduce because
Complexity caused by drilling cuttings is accumulated increases the rigidity of continuous pipe using rolling wheel centralizer, increases load transfer ability, is made using righting
With preventing drilling tool to be attached to the borehole wall, reduce the adsorption capacity of mud cake, the resistance of sliding can be reduced using idler wheel effect.
The wellbore trajectory section that the drilling drill assembly is selected is straight-increasing-drop section.Directly-increasing-drop section can be
Drilling tool holds drilling tool when drilling, so that the weight of drilling tool itself, improves drilling efficiency, it is ensured that safety.It is preferred that window point position,
Optimize Section Design, shorten sidetracking segment length to greatest extent, reduce TRAJECTORY CONTROL difficulty, improves construction efficiency.
For the drilling assembly when being crept into, every 100 meters of drilling needs spudding up and down primary.With hole angle
Increase, brill personnel is helped more conscientiously to operate, 100 meters of spudding up and downs of every drilling are primary, prevent sand setting bit freezing and viscous suction bit freezing.
The selection principle of the windowing position be the intact well section of selection casing, avoid casing coupling, cementing quality it is good,
Formation hardness is moderate, cement returns height or less 50m, avoids easy blowby stratum and avoids bad ground.The cementing quality is good to survey
Subject to the cement bond appraisal figure obtained；Formation hardness is moderate to require well radius variations rate for 10%-50%.Ensure to extend the use of drilling tool
Service life and the safety for ensuring windowing-process.
In description of the invention, it is to be understood that if the orientation or positional relationship for having the instructions such as term " on ", "lower" is
It is based on the orientation or positional relationship shown in the drawings, rather than the device or element of indication or suggestion meaning must have specific side
Position is constructed and operated in a specific orientation, therefore the terms describing the positional relationship in the drawings are only for illustration, Bu Nengli
Solution is the limitation to this patent.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (9)
1. a kind of continuous pipe old street district method, characterized by the following steps:
Latus rectum pipe cleaning is carried out to the casing of old well until the sundries of casing wall is cleaned out；
2) it opens a window in the casing after step 1) cleaning；When the windowing, firstly, being selected according to the selection principle of windowing position
Select windowing position；Then window opening tool tripping in windowing position and is subjected to milling windowing；
3) tripping in drilling drill assembly creeps into the old well after step 2 windowing.
2. continuous pipe old street district method as described in claim 1, it is characterised in that: the window opening tool includes continuous pipe
(1), the first connector (2), about the first non-rotating connector (3), the first releasing tool (4), screw rod (5), windowing milling shoe (6) and
Whipstock (7), it is continuous to manage (1), the first connector (2), about the first non-rotating connector (3), the first releasing tool (4), screw rod
(5) it is sequentially connected from up to down with windowing junk mill (6), whipstock (7) seat is hung in casing.
3. continuous pipe old street district method as claimed in claim 2, it is characterised in that: the windowing milling shoe (6) uses flat
Milling shoe.
4. continuous pipe old street district method as claimed in claim 3, it is characterised in that: the drilling drill assembly includes at least
It is drill bit (8), single bend PDM, measurement while drilling tool, directional orientation tool, the second releasing tool, hydroscillator (9), about second non-
Rotary joint and the second connector, drill bit (8), single bend PDM, measurement while drilling tool, directional orientation tool, the second releasing tool, waterpower
Oscillator (9), about the second non-rotating connector and the second connector is bottom-up is sequentially connected.
5. continuous pipe old street district method as claimed in claim 4, it is characterised in that: the drilling drill assembly further includes spiral shell
It revolves rolling wheel centralizer (10), spiral roller centralizer (10) connects the second connector.
6. continuous pipe old street district method as claimed in claim 5, it is characterised in that: the well that the drilling drill assembly is selected
Body track section is straight-increasing-drop section.
7. continuous pipe old street district method as claimed in claim 6, it is characterised in that: the drilling assembly is being bored
Into when, it is every drilling 100 meters need spudding up and down primary.
8. pipe old street district method as claimed in claim 7 continuous, it is characterised in that: the selection principle of the windowing position is
The intact well section of selection casing avoids that casing coupling, cementing quality are good, formation hardness is moderate, cement returns height or less 50m, avoid
Easy blowby stratum and avoid bad ground.
9. continuous pipe old street district method as claimed in claim 8, it is characterised in that: the good water to measure of the cementing quality
Earth rubber knot is evaluated subject to figure；Formation hardness is moderate to require well radius variations rate for 10%-50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592769.1A CN109667558A (en) | 2018-12-25 | 2018-12-25 | A kind of continuous pipe old street district method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592769.1A CN109667558A (en) | 2018-12-25 | 2018-12-25 | A kind of continuous pipe old street district method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109667558A true CN109667558A (en) | 2019-04-23 |
Family
ID=66147165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811592769.1A Pending CN109667558A (en) | 2018-12-25 | 2018-12-25 | A kind of continuous pipe old street district method |
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| Country | Link |
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| CN (1) | CN109667558A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905410A (en) * | 2019-11-29 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Safe crossing method for Sulige sidetracking slim hole box 7 tan mudstone section |
| CN111706259A (en) * | 2020-07-14 | 2020-09-25 | 中国石油集团渤海钻探工程有限公司 | Method for solving casing deformation by sidetracking old well paste-salt section reaming unfixed well |
| CN112160714A (en) * | 2020-10-15 | 2021-01-01 | 中国石油天然气集团有限公司 | Safe drilling method for long well section coiled tubing |
| CN115341868A (en) * | 2022-08-23 | 2022-11-15 | 中国石油天然气集团有限公司 | Device for reducing friction resistance in slim hole coiled tubing drilling and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5555946A (en) * | 1995-04-24 | 1996-09-17 | Klatt; Darrell | Method and tool for use in commmencing the drilling of a deviated well |
| CN2679348Y (en) * | 2004-03-01 | 2005-02-16 | 辽河石油勘探局 | Integrated tool for milling window in casing for side track drilling |
| CN102146779A (en) * | 2011-01-28 | 2011-08-10 | 中矿瑞杰(北京)科技有限公司 | Underground locating and angle-fixing drilling and windowing tool for horizontal well |
| CN202047749U (en) * | 2011-05-15 | 2011-11-23 | 中国石油集团西部钻探工程有限公司 | Whipstock easy to operate |
| CN104832119A (en) * | 2015-03-12 | 2015-08-12 | 北京一龙恒业石油工程技术有限公司 | Window opening and sidetrack drilling short-radius horizontal well and reverse circulation well cementing and water plugging method |
| CN105507839A (en) * | 2015-12-01 | 2016-04-20 | 中国石油天然气集团公司 | Window milling method for casings of continuous oil pipes |
| CN205349284U (en) * | 2015-12-25 | 2016-06-29 | 天津大港油田石油工程研究院钻采技术开发公司 | Sidetracked hole for sand control washable well give up and fill device |
-
2018
- 2018-12-25 CN CN201811592769.1A patent/CN109667558A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5555946A (en) * | 1995-04-24 | 1996-09-17 | Klatt; Darrell | Method and tool for use in commmencing the drilling of a deviated well |
| CN2679348Y (en) * | 2004-03-01 | 2005-02-16 | 辽河石油勘探局 | Integrated tool for milling window in casing for side track drilling |
| CN102146779A (en) * | 2011-01-28 | 2011-08-10 | 中矿瑞杰(北京)科技有限公司 | Underground locating and angle-fixing drilling and windowing tool for horizontal well |
| CN202047749U (en) * | 2011-05-15 | 2011-11-23 | 中国石油集团西部钻探工程有限公司 | Whipstock easy to operate |
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| CN205349284U (en) * | 2015-12-25 | 2016-06-29 | 天津大港油田石油工程研究院钻采技术开发公司 | Sidetracked hole for sand control washable well give up and fill device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905410A (en) * | 2019-11-29 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Safe crossing method for Sulige sidetracking slim hole box 7 tan mudstone section |
| CN110905410B (en) * | 2019-11-29 | 2021-01-29 | 中国石油天然气集团有限公司 | Safe crossing method for Sulige sidetracking slim hole box 7 tan mudstone section |
| CN111706259A (en) * | 2020-07-14 | 2020-09-25 | 中国石油集团渤海钻探工程有限公司 | Method for solving casing deformation by sidetracking old well paste-salt section reaming unfixed well |
| CN112160714A (en) * | 2020-10-15 | 2021-01-01 | 中国石油天然气集团有限公司 | Safe drilling method for long well section coiled tubing |
| CN112160714B (en) * | 2020-10-15 | 2023-03-10 | 中国石油天然气集团有限公司 | Safe drilling method for long well section coiled tubing |
| CN115341868A (en) * | 2022-08-23 | 2022-11-15 | 中国石油天然气集团有限公司 | Device for reducing friction resistance in slim hole coiled tubing drilling and using method thereof |
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