CN109083595A - A kind of fast slide-and-guide boring method - Google Patents
A kind of fast slide-and-guide boring method Download PDFInfo
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- CN109083595A CN109083595A CN201811160781.5A CN201811160781A CN109083595A CN 109083595 A CN109083595 A CN 109083595A CN 201811160781 A CN201811160781 A CN 201811160781A CN 109083595 A CN109083595 A CN 109083595A
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- torque
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- clockwise
- boring method
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
Abstract
The invention discloses a kind of fast slide-and-guide boring methods, comprising the following steps: S1: drill string contacts shaft bottom and carries out combined drilling with preset rotation speed, records the top after stablizing and drives minimal torque Tbottom；S2: 1.5~2.5 meters of rotary column lift-off shaft bottom and the top drive torque T with rotational speed identical with step S1, after recording stabilizationoff；S3: calculating rotates counterclockwise torque limit TCCWIt is limited with clockwise torque；S4: positive and negative revolving speed is driven on setting top, sets limitation torque T clockwiseCWWith limitation torque T counterclockwiseCCW, prepare top and drive swing；S5: starting top, which is driven, to be swung, and present invention reduces frictional resistances, is reduced frictional force, so that bit pressure is applied to drill bit, effectively improve rate of penetration, while being reduced drill bit and being impacted because bit pressure suddenly change generates and then injure drill bit.
Description
Technical field
The present invention relates to drilling technology field more particularly to a kind of fast slide-and-guide boring methods.
Background technique
Slide-and-guide technology is the conventional common directed-drilling technique of directed drilling operation.In actual orientation operation process,
With the increase of hole deviation degree and the increase of gradient well section, in non-rotary situation, the difficulty of drill string forward slip will increase drill string
Add, the reason is that being sticked when drill string does not rotate, the applying frictional force of bit freezing, thick big landwaste substantially increases.By transferring drill string
Load transfer is allowed to hinder to the friction that the difference between drill bit, the drill bit bit pressure actually obtained and the gravity of drill string is drilling rod movement
Power, the friction generated due to the relative motion between drill string and the borehole wall checker between static and dynamic, thus slide
Drill mode will control that uniform drill bit bit pressure is very difficult, and huge stiction may cause to bore in abrupt release
Pressure increases suddenly, if a bit pressure peak value makes drill bit broken rock reaction torque be more than the rated load of down-hole motor, motor will
The rotation of stall, drill bit can stop suddenly, and such stall condition may be damaged the elastomer stator of steerable motor, damage
Degree depends on passing to the bit pressure size of drill bit and the number of motor stall.
In conventional drilling mode, since drill bit is difficult to keep a constant bit pressure, and then drilling speed is influenced, so that sliding is led
To when bit speed be significantly less than mechanical bit speed.Due to the continuous variation of downhole drill bit bit pressure, so that tool-face angle is not
Disconnected variation, accurate pointing become difficult.Practical sliding directed drilling is to discharge drill string torque by above mentioning drill string, readjusts work
Tool face, and transfer to shaft bottom again to complete to orient, such method inefficiency.About 30% drilling time is used in sliding orientation
In tool-face adjustment.Meanwhile when mentioning on drill string, mud motor can increase suddenly due to losing load, velocity of rotation suddenly, high
Low speed, which is alternately present, can reduce PDC drill bit service life.
" quick sliding navigational drilling techniques " are to drive to complete quick sliding orientation by the swing top, first holding slush pump
Stablize discharge capacity output, tourist bus is with constant speed (or bit pressure) drilling well, and top drive is dynamic by not stopping back and forth, by drilling rod by axial static
The influence of frictional force switchs to the influence of kinetic force of friction, and the foundation to swing back and forth is that the torque effect being subject to is driven on top.Drill bit mechanics is flat
After weighing apparatus, by constantly compensating clockwise action torque, so that downhole tool is towards clockwise；By compensating side counterclockwise
To action torque so that tool is towards offset counterclockwise.In entire operation process, the measurement of bit pressure is to refer to standpipe pressure,
The reaction torque power effect that drill bit is subject to is calculated by standpipe pressure, and then adjusts top drive and swings.How to determine that top is driven to swing
The point of balance used in drilling rod seems particularly important, and torque is excessive, influences whether downhole tool face, and then directional effect,
Torque is too small, and torque influence range is short, and effect is unobvious.
Summary of the invention
To solve the above-mentioned problems, the present invention proposes a kind of fast slide-and-guide boring method.
Specifically, a kind of fast slide-and-guide boring method, comprising the following steps:
S1: drill string contacts shaft bottom and carries out combined drilling with preset rotation speed, records the top after stablizing and drives minimal torque Tbottom；
S2: 1.5~2.5 meters of rotary column lift-off shaft bottom and the top drive torsion with rotational speed identical with step S1, after recording stabilization
Square Toff；
S3: calculating rotates counterclockwise torque limit TCCWIt is limited with clockwise torque；
S4: positive and negative revolving speed is driven on setting top, sets limitation torque T clockwiseCWWith limitation torque T counterclockwiseCCW, prepare top and drive pendulum
It is dynamic；
S5: starting top, which is driven, to be swung.
Further, top described in step S5, which is driven, swings, including following sub-step:
S51: forward direction is swung, and current torque is driven on real-time circulation monitoring top, and such as current torque is limited greater than clockwise torque
Value TCW, then backswing is driven into top otherwise continue positive swing；
S52: backswing is driven on top, and current torque is driven on real-time circulation monitoring top, and such as current torque is greater than and rotates counterclockwise
Torque limit value TCCW, then it is transferred to positive swing again, otherwise, continues backswing.
Further, the preset rotation speed is 10rpm.
Further, described to rotate counterclockwise torque limit TCCWCalculation formula TCCW=TCW- 2*(Tbottom-Toff) calculate
Rotate counterclockwise torque limit value；
Further, the clockwise torque restricted TCWCalculation formula value are as follows: TCW= Tbottom。
The beneficial effects of the present invention are: (1) in orientation process, drill bit does not need lift-off shaft bottom；The activity duration is reduced, is mentioned
High working efficiency reduces operating cost.
(2) it reduces mud motor to injure as caused by the change width of reaction torque, prolong the service life.
(3) part more than drill string bent drill pipe is influenced this by stiction for dynamic friction, improves rate of penetration.
(4) drilling operation course is continuous, is easy to drill out longer horizontal segment, mitigates drill stem buckling.
(5) use in drilling process to drilling well lubricating fluid can be reduced by the method that drill string is swung.
Detailed description of the invention
Fig. 1 is torque schematic diagram；
Fig. 2 is flow chart of the invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
Bright specific embodiment.
A kind of fast slide-and-guide boring method, the method for improving slide drilling drilling speed are driven (or turntable) by top and are swung come complete
At during slide drilling, top is driven and ceaselessly swung, and destroys the mechanical balance established between drilling rod and the borehole wall, reduces frictional resistance, reduces
Frictional force enables bit pressure to be applied to drill bit, effectively improves rate of penetration, while reducing drill bit because bit pressure suddenly change generates punching
It hits and then injures drill bit.
Program key technology is how to determine that the point of balance used in drilling rod that swings, torque mistake are driven in top
Greatly, downhole tool face, and then directional effect are influenced whether, torque is too small, and torque influence range is short, and effect is unobvious, swings and turns round
Square needs to determine jointly by drill string performance with well track.
In swing process, there are tripping and failure risk, system design, which has, adjusts overtime protection and tripping torque protection.
As shown in Figure 1,
Ae sections are driven torque wrench moment for top, and ad sections are driven compound drilling torque for top, and cd sections are underground screw motor reaction torque, and pendulum is driven on top
Setting limits torque T clockwise when dynamicCW, torque T is limited counterclockwiseCCW。
Calculate TCCWMethod it is as follows: top drive with 10RPM (it is assumed that) shaft bottom carry out combined drilling, take at this time top drive most
Small torque Tbottom, by 2 meters of drill string lift-off shaft bottom, it is ensured that it is hanging that drill bit is detached from shaft bottom, with the rotation of identical Top Drive RPM, takes at this time
Average torque Toff,It is calculated according to torque schematic diagram, TCWValue should be slightly less than Tbottom, it is ensured that it will not be by work when clockwise oscillation
Tool face rotates counterclockwise torque limit value T toward movement clockwiseCCW=TCW- 2*(Tbottom-Toff；Wherein, clockwise torque
Limits value TCW= Tbottom.When sliding orientation, with TCWAnd TCCWAnti-clockwise torque limits value respectively clockwise is swung, can
The frictional resistance of drilling rod is effectively reduced, backing pressure is reduced, improves bit speed.
It is as follows that the judgment criteria swung forward or backwards is driven on top:
Forward direction is swung, and current torque is driven on real-time circulation monitoring top, and such as current torque is greater than clockwise torque limits value
TCW, then backswing is driven into top otherwise continue positive swing；
Backswing is driven on top, and current torque is driven on real-time circulation monitoring top, and such as current torque, which is greater than, rotates counterclockwise torque
Limits value TCCW, then it is transferred to positive swing again, otherwise, continues backswing.
Claims (5)
1. a kind of fast slide-and-guide boring method, which comprises the following steps:
S1: drill string contacts shaft bottom and carries out combined drilling with preset rotation speed, records the top after stablizing and drives minimal torque Tbottom；
S2: 1.5~2.5 meters of rotary column lift-off shaft bottom and the top drive torsion with rotational speed identical with step S1, after recording stabilization
Square Toff；
S3: calculating rotates counterclockwise torque limit TCCWIt is limited with clockwise torque；
S4: positive and negative revolving speed is driven on setting top, sets limitation torque T clockwiseCWWith limitation torque T counterclockwiseCCW, prepare top and drive swing；
S5: starting top, which is driven, to be swung.
2. a kind of fast slide-and-guide boring method according to claim 1, which is characterized in that drive pendulum in top described in step S5
It is dynamic, including following sub-step:
S51: forward direction is swung, and current torque is driven on real-time circulation monitoring top, and such as current torque is limited greater than clockwise torque
Value TCW, then backswing is driven into top otherwise continue positive swing；
S52: backswing is driven on top, and current torque is driven on real-time circulation monitoring top, and such as current torque is greater than and rotates counterclockwise
Torque limit value TCCW, then it is transferred to positive swing again, otherwise, continues backswing.
3. a kind of fast slide-and-guide boring method according to claim 1, which is characterized in that the preset rotation speed is
10rpm。
4. a kind of fast slide-and-guide boring method according to claim 1, which is characterized in that described to rotate counterclockwise torque
Restricted TCCWCalculation formula TCCW=TCW- 2*(Tbottom-Toff) calculate rotate counterclockwise torque limit value.
5. a kind of fast slide-and-guide boring method according to claim 1, which is characterized in that the clockwise torque limitation
TCWCalculation formula value are as follows: TCW= Tbottom。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160781.5A CN109083595B (en) | 2018-09-30 | 2018-09-30 | Fast sliding guiding drilling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160781.5A CN109083595B (en) | 2018-09-30 | 2018-09-30 | Fast sliding guiding drilling method |
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| Publication Number | Publication Date |
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| CN109083595A true CN109083595A (en) | 2018-12-25 |
| CN109083595B CN109083595B (en) | 2020-05-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107351A (en) * | 2020-01-11 | 2021-07-13 | 中石化石油工程技术服务有限公司 | Top drive main shaft control method for improving sliding guide drilling efficiency |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008036522A2 (en) * | 2006-09-20 | 2008-03-27 | Smith International, Inc. | Method of directional drilling with steerable drilling motor |
| CN106050216A (en) * | 2016-06-02 | 2016-10-26 | 中国石油天然气集团公司 | Top drive twisting drag reduction method and device capable of improving sliding drilling efficiency |
| CN106401467A (en) * | 2016-12-12 | 2017-02-15 | 中国石油集团川庆钻探工程有限公司 | Slidable well drilling method |
| CN106437513A (en) * | 2016-09-26 | 2017-02-22 | 中国石油大学(华东) | Complex structural well friction resistance reduction and power drill tool face adjusting method |
-
2018
- 2018-09-30 CN CN201811160781.5A patent/CN109083595B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008036522A2 (en) * | 2006-09-20 | 2008-03-27 | Smith International, Inc. | Method of directional drilling with steerable drilling motor |
| CN106050216A (en) * | 2016-06-02 | 2016-10-26 | 中国石油天然气集团公司 | Top drive twisting drag reduction method and device capable of improving sliding drilling efficiency |
| CN106437513A (en) * | 2016-09-26 | 2017-02-22 | 中国石油大学(华东) | Complex structural well friction resistance reduction and power drill tool face adjusting method |
| CN106401467A (en) * | 2016-12-12 | 2017-02-15 | 中国石油集团川庆钻探工程有限公司 | Slidable well drilling method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107351A (en) * | 2020-01-11 | 2021-07-13 | 中石化石油工程技术服务有限公司 | Top drive main shaft control method for improving sliding guide drilling efficiency |
| CN113107351B (en) * | 2020-01-11 | 2023-11-28 | 中石化石油工程技术服务有限公司 | Top drive main shaft control method for improving sliding guide drilling efficiency |
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| CN109083595B (en) | 2020-05-01 |
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