CN107133413A - Permanent tool face azimuth curve Hole clean method - Google Patents
Permanent tool face azimuth curve Hole clean method Download PDFInfo
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Abstract
The present invention relates to a kind of rail design method, belong to down hole drill technical field, and in particular to a kind of permanent tool face azimuth curve Hole clean method.The present invention, which is set up, limits aiming spot, and the permanent tool face azimuth Well-path Planning Models of two kinds of exemplary three-dimensionals of aiming spot and rarget direction are limited simultaneously, can according to different design requirements flexibly, rapid solving design constraint equation, design is had generality and flexibility, be that Hole clean and control provide theoretical foundation.
Description
Technical field
The present invention relates to a kind of rail design method, belong to down hole drill technical field, and in particular to a kind of permanent tool-face
Angular curve Hole clean method.
Background technology
With the development of directed-drilling technique, higher requirement is proposed to Hole clean and control.In Directional Drilling
In well operations, the borehole track being related to is generally three-dimensional borehole track, such as sidetracked hole horizontal well, geologic steering drilling and treats drilling well
Eye track, it is desirable to which wellbore trajectory control, which is tried one's best, meets design requirement, and is easy to oriented control, it is ensured that effectively and quickly bore and reach mesh
Layer position.
The outstanding feature of permanent tool face azimuth curve borehole track is that hole curvature, hole deviation angular rate of change and tool face azimuth are equal
For constant, it is easy to directional operation, it is possible to decrease drillng operation expense, is used for Directional Drilling as a kind of typical borehole track model
In well.Calculated because the north of permanent tool face azimuth curve, east coordinate are related to the numerical integration containing trigonometric function, to making well rail
Road model solution difficulty is, it is necessary to study feasible, effective numerical computation method to realize.
Space Oblique plane arc model is widely used in directed drilling, and three-dimensional arc orbit need to be continually changing tool-face
Angle could realize that practice of construction is difficult to, it is impossible to accurately control drilling trace, and operating efficiency is low.Existing permanent tool face azimuth
Model is proposed generally directed to a certain particular problem, lacks general applicability, and parametric solution mode is single.In order to meet reality
The need for engineer applied, borehole track model will have a versatility, and a diversity should be had by solving parameter mode, but this respect at present
Research go back imperfection and system, it is difficult to meet directed drilling Track desigh and control the need for.
In three-dimensional Hole clean and control, the position of starting point, the position of well direction and goal point are true
It is fixed, and the well direction of target point can be divided into and not limit and limits two types, and directional well is corresponded to respectively and horizontal well is required.
Two kinds of typical permanent tool face azimuth borehole track models are set up for this, can develop and a variety of profile types, can flexibly, quickly ask
Solution, the need for meeting a variety of Hole cleans and control.
The content of the invention
It is an object of the invention to set up restriction aiming spot, and aiming spot and rarget direction are limited simultaneously
The permanent tool face azimuth Well-path Planning Models of two kinds of exemplary three-dimensionals, flexible, rapid solving can be designed according to different design requirements
Constraint equation, makes design have generality and flexibility, is that Hole clean and control provide theoretical foundation.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：
A kind of permanent tool face azimuth curve Hole clean method, including：
Step 1, model trajectory selection step, for according to Hole clean and control needs, selecting Track desigh mould
Type；
Step 2, basic data determines step, for giving the starting point of Hole clean and the datum of target point
According to the given data includes：Starting point coordinate (XS, YS, ZS) and direction (α1, φ1), coordinate of ground point (XT, YT, ZT)；
Step 3, data calculate analytical procedure, according to the given data of determination, calculate the sky between starting point and target point
Between apart from L and starting point to punctuate minimum hole curvature Kmin；If three sections of track target points processed are on starting point tangent line or five
When section track starting point processed and conllinear target point tangent line, then hold angle gets into target point, then performs step 8, otherwise continuation order
Perform step 4；
Step 4, solution mode determines step, and selection determines design parameter, it is determined that solving combination, solves unknown ginseng
Number；
Step 5, it is known that parameter gives step, according to Track desigh and demand for control, gives step 4 parameter L1、L2、L3、
K1、K2The known variables of middle selection；
Step 6, initial guess calculation procedure, designs a model by correspondence Space Oblique planar tracks and is solved, by its result
It is used as the initial value of permanent tool face azimuth Track desigh model solution variable；
Step 7, model trajectory determines step, permanent tool face azimuth Track desigh model is solved using quasi-Newton method, if nothing
Solution, goes to step 5 adjustment known parameters, or goes to step 4 and reselect parametric solution mode；
Step 8, orbit parameter determines step, obtains after unknown parameter, by permanent tool face azimuth model trajectory calculate node
Borehole track parameter, including well depth, hole angle, azimuth and coordinate data.
Optimize, a kind of above-mentioned permanent tool face azimuth curve Hole clean method, in the step 2, when the rail
When road is designed a model as double permanent tool face azimuth Track desigh models, the parameter of the determination includes target point direction (α3, φ3)；
Wherein, α3、φ3Respectively target point hole angle and azimuth.
When the Track desigh model is single permanent tool face azimuth Track desigh model, target point hole angle or side are limited
Parallactic angle, and the parameter determined includes the hole angle α of target point2Or azimuth φ2。
Optimize, a kind of above-mentioned permanent tool face azimuth curve Hole clean method, in the step 2, for sidetracking
Well or borehole track adjusted design, obtain designing the data of starting point by deviational survey data processing method.
Optimize, a kind of above-mentioned permanent tool face azimuth curve Hole clean method, in the step 4, for Dan Heng
Tool face azimuth Track desigh model, in 3 design parameter L1、L2、 K1In, can optional 2 be known parameters, solve another ginseng
Number；In formula, straightway L1, straightway L2、K1For the hole curvature of curved section 1.
Optimization, a kind of above-mentioned permanent tool face azimuth curve Hole clean method limits the hole angle α of target point2
Or azimuth φ2, optional L1、L2、K1In one be known parameters, solve two other parameter.
Optimize, a kind of above-mentioned permanent tool face azimuth curve Hole clean method, in the step 4, to double permanent works
Has face angle Track desigh model, in 5 design parameter L1、L2、L3、 K1、K2In, optional 4 are known parameters, solve another ginseng
Number；In formula, straightway L1, straightway L2, straightway L3、K1For the hole curvature of curved section 1, K2It is bent for the well of curved section 2
Rate.
Optimize, a kind of above-mentioned permanent tool face azimuth curve Hole clean method, in the step 4, to double permanent works
Have face angle Track desigh model and give design parameter L1、L2、L3, and make K1=K2, solve K1、K2；In formula, K1For curved section 1
Hole curvature, K2For the hole curvature of curved section 2.
Therefore, the invention has the advantages that：Three sections of systems realize that limiting aiming spot and five sections of systems realizes and limit simultaneously
The permanent tool face azimuth Hole clean of two kinds of exemplary three-dimensionals of aiming spot and rarget direction, can meet directional well and horizontal well
Primary demand is designed, can develop and one to five sections of a variety of profile types of system, five sections of above sections processed also be extended to, with one
As property.Parametric solution mode combines many, and gives correspondence initial value method for solving, can according to different design requirements flexibly,
Rapid solving design constraint equation, makes design have generality and flexibility, for Hole clean and control provides theory according to
According to.
Brief description of the drawings
Mono- permanent tool face azimuth section track (the three sections of tracks processed) schematic diagrames of Fig. 1；
Double permanent tool face azimuth section track (the five sections of tracks processed) schematic diagrames of Fig. 2；
Tri- sections of Fig. 3 tracks processed solve design cycle schematic diagram；
Five sections of Fig. 4 tracks processed solve design cycle schematic diagram；
Fig. 5 perseverances tool face azimuth rail design method flow chart.
Fig. 6 Wellbore trajectory control methods.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment：
1st, permanent tool face azimuth Track desigh model
Coordinate system OXYZ, O are well head to Hole clean with using east northeast, and X-axis points to due north, and Y-axis points to due east, Z axis
Point to vertical.In order to meet directional well and Trajectory of Horizontal Well design needs, " straightway-perseverance tool face azimuth section-straight is set up
Line segment " and " straightway-perseverance tool face azimuth section-straightway-perseverance tool face azimuth section-straightway " two classes design a model, its cathetus
Segment length can be zero, disclosure satisfy that the two kinds of typical orbits design for limiting target location and limiting target location and direction simultaneously
It is required that.
As illustrated in fig. 1 and 2, its constraint equation is two kinds of permanent tool face azimuth Track desigh models：
Wherein, Δ X=XT-XS, Δ Y=YT-YS, Δ Z=ZT-ZS, also,
In formula, LiFor length of straigh line, m；SiFor curve segment length, m；αiFor hole angle, rad；φiFor azimuth,
rad；KiFor hole curvature, rad/m；KαiFor hole deviation angular rate of change, rad/m；Kαi=Kicosωi；ωiFor tool face azimuth, rad.
When the permanent tool face azimuth initial hole angle of section is 0, then the section is degenerated two-dimentional circular arc well section.Due to length of straigh line
It can be zero, can develop and a variety of Hole clean profile types, the need for meeting Hole clean and control.
2nd, permanent tool face azimuth Track desigh model solution method
Track desigh model contains 3 independent restraining equations, can solve 3 unknown numbers.Asked to meet flexible design
The need for solution, with straight line segment length L1、L2、L3Or curvature K1、K2For 1 basic solution variable, it is unknown to select other 2 variables
Number, remaining parameter is that datum is solved.Calculate, use due to being related to the numerical integration containing trigonometric function in constraint equation
Intend newton method to be solved, the derivative operation of complexity can be avoided.When being solved using quasi-Newton method, initial guess choosing is solved
Select particularly important.Select value near feasible solution that to solve initial guess, correct result can be rapidly converged to.It is determined that 3 solutions
After variable combination, first by corresponding arc orbit model solution, its result is used as the first of permanent tool face azimuth Track desigh model
Value, then solved with quasi-Newton method, so that complicated Solving Nonlinear Systems of Equations problem is resolved.
2.1st, single permanent tool face azimuth Track desigh model solution
To single permanent tool face azimuth Track desigh model, variables L is given1、L2And K1In any two parameter, can solve another
One parameter, and in the case of the hole angle of target point or azimuth is limited, give any one in 3 variables, can solve
Two other variable, 9 kinds solve combination altogether, as shown in Figure 3.
Tapered plane three sections of solution formulas processed in space are as follows：
Wherein, L is starting point and the air line distance of target point, m；TsIt is long for projections of the L on starting point tangent line vector
Degree, m.
As the hole angle α of given target point2When, the length that can ask the point of intersection of tangents of arc section two to starting point is：
Wherein, a=cos2α1-cos2α2, b=-2 [Δ Zcos α1-Tscos2α2], c=Δs Z2-L2cos2α2.Work as α2＞
At 90 °, "+" is taken；Work as α2At≤90 °, "-" is taken.
When the azimuth φ of given target point2When, the length that can ask the point of intersection of tangents of arc section two to starting point is：
The point of intersection of tangents of arc section two is to the length of target initial point：
When the azimuth of the hole angle or target point that limit target point, by (5) or (6) and (7) formula, λ can be obtained1, λ2。
Arc section angle of bend is：
θ=arccos [(Δ Xsin α1cosφ1+ΔYsinα1sinφ1+ΔZcosα1-λ1)/λ2] (8)
And then try to achieve relationship below：
By (2)~(9) formula, design variable L is given1、L2、K1In any one can parse and try to achieve two other variable.
2.2nd, double permanent tool face azimuth Track desigh model solutions
To double permanent tool face azimuth Track desigh models, variables L is given1、L2、L3、K1And K2In any 4 parameters, can ask
Solve another parameter, and given variables L1、L2、L3, solve K1=K2, 6 kinds solve combination altogether, as shown in Figure 4.
It is determined that 3 solve variables combination and solve permanent tool face azimuth Track desigh model initial value after, then use quasi-Newton method
Solve, the correct result of permanent tool face azimuth Track desigh Solutions of The System of Nonlinear Equations can be rapidly converged to.
With double permanent tool face azimuth Track desigh models, to give L1、L3、K1And K2, solve L2Exemplified by, introduction, which designs a model, to be asked
Solve step：
Step 1, with L2Variable, reselection α are solved to be basic2And φ2Variable is unknown number, is used as 3 of equation group (1)
Solve parameter；
Step 2, according to design starting point and coordinate and the direction of target point, and given L1、 L3、K1And K2Known ginseng
Number, seeks the solution of correspondence space circular arc model trajectory, and by its result L2、 α2And φ2It is used as the permanent tool face azimuth model solution of correspondence
Initial value；
Step 3, K is soughtα1、Kα2、S1And S2, determine the azimuthal increase and decrease symbol of two curved sections；
In formula (10), increasing hole angle takes "+", and drop angle takes "-", during hold angle, Kα1=0, work as α1When=0, Kα1=K1。
Similarly, K can be tried to achieveα2And S2。
Step 4, equation group (1) is solved with quasi-Newton method；
Step 5, if equation group has solution, track node parameter is calculated.
According to model solution method, can work out two kinds of modular design models 15 kinds solve combination calculation procedure, solve spirit
It is living, quick, rational design, horizontal well, sidetracked hole and Track desigh to be drilled and demand for control can be met.
3rd, Hole clean method
Permanent tool face azimuth Hole clean method is as shown in figure 5, specifically include following steps.
Step 1, Track desigh model is selected
According to Hole clean and control needs, Track desigh model is selected.Enter target side when needing restriction borehole track
Xiang Shi, then need to select double permanent tool face azimuth Track desigh models.
Step 2, design basis data is determined
The starting point of given Hole clean and the given data of target point, i.e. starting point coordinate (XS, YS, ZS) and side
To (α1, φ1), coordinate of ground point (XT, YT, ZT).To double permanent tool face azimuth Track desigh models, target point direction (α is provided3,
φ3).To single permanent tool face azimuth Track desigh model, if limit target point hole angle or azimuth, the well of target point is provided
Bevel angle α2Or azimuth φ2.For sidetracked hole or borehole track adjusted design, obtain designing by deviational survey data processing method
The data of initial point.
Step 3, analysis initial data is calculated
According to the data in step 2, space length L and starting point between starting point and target point can be calculated to target
The minimum hole curvature K of pointmin。
If three sections of track target points processed on starting point tangent line or five sections of track starting points processed and target point tangent line it is conllinear
When, then hold angle gets into target point, goes to step 8；Otherwise step 4 is arrived.
Step 4, parametric solution mode is determined
To single permanent tool face azimuth Track desigh model, in 3 design parameter L1、L2、K1In, can optional 2 ginsengs for known to
Number, solves another parameter.If limiting the hole angle α of target point2Or azimuth φ2When, can optionally L1、L2、K1In one be known
Parameter, solves two other parameter.9 kinds solve combination altogether, as shown in Figure 3.
To double permanent tool face azimuth Track desigh models, in 5 design parameter L1、L2、L3、K1、 K2In, can optional 4 for
Know parameter, solve another parameter, and given design parameter L1、 L2、L3, seek K1=K2.6 kinds solve combination altogether, such as Fig. 4 institutes
Show.
The span of design parameter refers to result of calculation L, K in step 3minWith the maximum well that license is given in engineering
Eye curvature Kmax。
Step 5, known parameters are given
According to Track desigh and demand for control, step 4 parameter L is given1、L2、L3、K1、K2The known variables of middle selection.
Step 6, calculate and solve initial guess
Design a model and solved by correspondence Space Oblique planar tracks, regard its result as permanent tool face azimuth Track desigh
The initial value of model solution variable.
Step 7, permanent tool face azimuth Track desigh model is solved
Permanent tool face azimuth Track desigh model is solved using quasi-Newton method.If without solution, 5 adjustment known parameters are gone to step, or
Go to step 4 and reselect parametric solution mode.
Step 8, track node parameter is calculated
Obtain after unknown parameter, by the borehole track parameter of permanent tool face azimuth model trajectory calculate node, including well depth,
Hole angle, azimuth and coordinate data etc..
Step 9, track detailed data is calculated
By certain step size computation curved section and steady tilted section orbit parameter.
Step 10, output track design data.
4th, Wellbore trajectory control method
Wellbore trajectory control method is according to designed path profile type, design well amount of curvature, wellbore trajectory control work
Have and require to determine.Control method is as shown in fig. 6, basic step is as follows：
Step 1, control targe and requirement are determined
According to designed path data, control targe and tolerance are determined, oil-gas exploration and development is met and drilling technology will
Ask.
Step 2, design BHA and drill column structure
According to orbits controlling target and requirement, well drilling rail control mode is determined, bottomhole assembly BHA is designed, including
Drill bit, BHA types, stabilizer number and external diameter, drilling tool structure size, the bent angle size of helicoid hydraulic motor, rotary steerable tool class
Type and specification；According to Track desigh, control technique, rate of penetration and drill bit use time etc., it is contemplated that drill footage, rubbed
Resistance, torsional analysis and drill string limitation are checked, and optimize drill column structure.
Step 3, instrument configuration, test and lower brill
By design BHA and drill column structure way-type drilling unit, measurement control instrument is configured and tested, after test passes,
Bored under way-type drilling unit.
Step 4, by design parameter guide digging
Got under drilling tool behind bottom, guide digging is carried out by design borehole track and drilling parameter.In drilling process, with
Measurement various parameters are bored, and upload to ground, in real time monitoring guiding situation and formation variation etc..
Step 5, drilling operation deviational survey is suspended
When boring up to desired depth or when needing deviational survey, suspend drilling operation, static measurement hole deviation data, it is ensured that deviational survey
Data are accurate.
Step 6, track following and variance analysis
According to deviational survey data, track following and variance analysis are carried out.The deviation of drilling trajectory and designed path includes distance
Deviation, the deviation of directivity, hole angle and azimuth angle deviation etc..If deviation is in allowed band, continue by former designed path drilling,
Predeterminated target is reached until boring；If deviation exceeds allowed band, and when not in drilling tool controlled range, then terminates drilling operation.
Step 7, orbit adjusting is designed
If deviation changes beyond allowed band or geologic objective, and when in drilling tool controlled range, then carries out rail
Road adjusted design.According to current bottom hole location, hole angle, azimuth and adjustment target point data, reasonable selection profile type enters
Row Track desigh to be drilled, and carry out orbits controlling by design to be drilled.
When being controlled using permanent tool face azimuth model trajectory proposed by the present invention, it is easy to the orientation of conventional steering tool
Constructing operation, can also reduce teletype command number under the tool face azimuth of rotary steering system, save the positioning operation time, improve work
Make efficiency.
Step 8, drilling operation is terminated
When boring up to predeterminated target or needing more bit change etc., then terminate drilling operation.
5th, recruitment evaluation
The method of the present embodiment can meet the perseverance for limiting aiming spot and limiting aiming spot and direction simultaneously
Tool face azimuth Hole clean and control are required.Model can realize a variety of section combining forms, with general applicability；Give
Go out permanent tool face azimuth borehole track constraint equation method for solving, design and control method are simple, practical, it is easy to which well is controlled,
Design efficiency, reduction positioning operation time and cost can be improved, realizes that safety, quick, high-quality are drilled the purpose of well operations.
The effect of the present embodiment is assessed using two specific embodiments below.
Example 1：The coordinate of certain directional well current point is：XS=100m, YS=-100m, ZS=2000m；Hole angle and orientation
Angle is respectively α1=10 °, φ1=315 °.The coordinate of target point is： XT=200m, YT=-1100m, ZT=4000m.If continuing
L is crept into by when front direction1=200m, then with deflecting ability be K1=3 °/30m instrument adjusts borehole track.Design result
To creep into S with permanent tool face azimuth ω=- 33.28 °1Again with hold angle drilling tool drilling L after=235.54m2=1821.75m can be accurate
Reach design object point.Its borehole track data is shown in Table 1.
The directional well Track desigh data of table 1 (three sections of tracks processed)
Example 2：Certain three-dimensional horizontal well terminal point coordinate XT=31.70m, YT=-1288.80m, ZT=869.42m, horizontal segment well
Bevel angle α3=90.36 °, azimuth φ3=270 °, segment length L3=941.72m.From vertical well section deflecting, kickoff point (KOP) depth L1=
532m, curvature K1=K2=6 °/30m, with permanent tool-face horn cupping planned well eye track.
Using double permanent tool face azimuth Track desigh models, correspondence arc orbit hold angle segment length, hole angle and orientation are obtained
Angle, the initial value of permanent tool face azimuth Orbit Restrain Equation is solved as quasi-Newton method, is iterated to calculate through 2 numerical value, trying to achieve result is
L2=80.706m, α2=46.164 °, φ2=277.686 °, borehole track data are shown in Table 2.
The Trajectory of Horizontal Well design data of table 2 (five sections of tracks processed)
As shown in Table 2, second curve well section is that deflecting turns round orientation well section, and orbits controlling is carried out by permanent tool-face, with
The change of well depth, its tool face azimuth perseverance is -8.87 °, it is easy to orient construction operation；, can be notable when using rotary steering system
Reduce subsurface and pass tool face azimuth instruction number, operating efficiency and control accuracy can be improved, quick, the drilling well purpose of high-quality is reached.
The landing point hole deviation and orientation of certain horizontal well design of example 3 are α3=88 °, φ3=50 °.Current point hole angle and side
Parallactic angle is α1=76 °, φ1=54 °, the coordinate away from landing point is respectively：Δ X=52.70m, Δ Y=57.51m, Δ Z=12m,
How designed path makes it accurately land.
Because vertical depth of the current point away from landing point only has 12m, therefore a kind of simplest double permanent tool face azimuth tracks of design,
I.e. permanent tool face azimuth section+permanent tool face azimuth section form (K1=K2), so that a set of conventional skew-swept airfoil steering tool can make its accurate
Land.Design result is K1=K2=8.327 °/30m, orbital data is shown in Table 3.
The Trajectory of Horizontal Well design data of table 3 (with the double permanent tool face azimuth sections of curvature)
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to of the invention
The technical staff in field can make various modifications or supplement to described specific embodiment or use similar mode
Substitute, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (7)
1. a kind of permanent tool face azimuth curve Hole clean method, it is characterised in that including：
Step 1, model trajectory selection step, for according to Hole clean and control needs, selecting Track desigh model；
Step 2, basic data determines step, for giving the starting point of Hole clean and the given data of target point, institute
Stating given data includes：Starting point coordinate (XS, YS, ZS) and direction (α1, φ1), coordinate of ground point (XT, YT, ZT)；
Step 3, data calculate analytical procedure, according to the given data of determination, calculate space between starting point and target point away from
From the minimum hole curvature K of L and starting point to punctuatemin；If three sections of track target points processed are on starting point tangent line or five sections of rails processed
When road starting point and conllinear target point tangent line, then hold angle gets into target point, then performs step 8, and otherwise continuation order performs step
Rapid 4；
Step 4, solution mode determines step, and selection determines design parameter, it is determined that solving combination, solves unknown parameter；
Step 5, it is known that parameter gives step, according to Track desigh and demand for control, gives step 4 parameter L1、L2、L3、K1、K2In
The known variables of selection；
Step 6, initial guess calculation procedure, is designed a model and is solved by correspondence Space Oblique planar tracks, using its result as
The initial value of permanent tool face azimuth Track desigh model solution variable；
Step 7, model trajectory determines step, and permanent tool face azimuth Track desigh model is solved using quasi-Newton method, if without solution, turning step
Rapid 5 adjustment known parameters, or go to step 4 and reselect parametric solution mode；
Step 8, orbit parameter determines step, obtains after unknown parameter, by the well of permanent tool face azimuth model trajectory calculate node
Orbit parameter, including well depth, hole angle, azimuth and coordinate data.
2. a kind of permanent tool face azimuth curve Hole clean method according to claim 1, it is characterised in that the step
In rapid 2, when the Track desigh model is double permanent tool face azimuth Track desigh model, the parameter of the determination includes target point
Direction (α3, φ3)；Wherein, α3、φ3Respectively target point hole angle and azimuth；
When the Track desigh model is single permanent tool face azimuth Track desigh model, target point hole angle or azimuth are limited,
And the parameter determined includes the hole angle α of target point2Or azimuth φ2。
3. a kind of permanent tool face azimuth curve Hole clean method according to claim 1, it is characterised in that the step
In rapid 2, for sidetracked hole or borehole track adjusted design, obtain designing the data of starting point by deviational survey data processing method.
4. a kind of permanent tool face azimuth curve Hole clean method according to claim 1, it is characterised in that the step
In rapid 4, for single permanent tool face azimuth Track desigh model, in 3 design parameter L1、L2、K1In, can optional 2 ginsengs for known to
Number, solves another parameter；In formula, straightway L1, straightway L2、K1For the hole curvature of curved section 1.
5. a kind of permanent tool face azimuth curve Hole clean method according to claim 4, it is characterised in that limit mesh
The hole angle α of punctuate2Or azimuth φ2, optional L1、L2、K1In one be known parameters, solve two other parameter.
6. a kind of permanent tool face azimuth curve Hole clean method according to claim 1, it is characterised in that the step
In rapid 4, to double permanent tool face azimuth Track desigh models, in 5 design parameter L1、L2、L3、K1、K2In, optional 4 are known ginseng
Number, solves another parameter；In formula, straightway L1, straightway L2, straightway L3、K1For the hole curvature of curved section 1, K2For curve
The hole curvature of section 2.
7. a kind of permanent tool face azimuth curve Hole clean method according to claim 1, it is characterised in that the step
In rapid 4, design parameter L is given to double permanent tool face azimuth Track desigh models1、L2、L3, and make K1=K2, solve K1、K2；In formula,
K1For the hole curvature of curved section 1, K2For the hole curvature of curved section 2.
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