CN104675385A - Mounting error correcting method and system - Google Patents

Mounting error correcting method and system Download PDF

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Publication number
CN104675385A
CN104675385A CN201410465494.0A CN201410465494A CN104675385A CN 104675385 A CN104675385 A CN 104675385A CN 201410465494 A CN201410465494 A CN 201410465494A CN 104675385 A CN104675385 A CN 104675385A
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Prior art keywords
hole angle
multiple spot
equation
circle
tool face
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CN201410465494.0A
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CN104675385B (en
Inventor
吴文晋
王恒
韩志富
白玉新
秦二卫
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Beijing Research Institute of Precise Mechatronic Controls
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Beijing Research Institute of Precise Mechatronic Controls
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    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Geophysics (AREA)
  • Testing Of Balance (AREA)
  • Earth Drilling (AREA)

Abstract

The invention discloses a mounting error correcting method and system. The method includes: acquiring correcting circle center parameters according to set conditions; generating a correcting equation according to the correcting circle center parameters; performing error correcting on actually-collected hole deviation angles according to the correcting equation. By the method, the problem of measuring instrument measuring angle deviation caused by mechanical mounting errors is solved, the requirements on mechanical machining errors and mounting precision are lowered, special attention to precision during product production and assembly is avoided, and mounting errors can be corrected. In addition, the method is simple and practical to implement, applicable to necessary data correction after devices leave factories, and evident in correcting effect especially when hole deviation angles are small.

Description

Alignment error bearing calibration and system
Technical field
The present invention relates to field of petroleum exploitation, be applied to the installation of vertical drilling, particularly alignment error bearing calibration and system.
Background technology
Directional tool is the core component of Vertical-drilling Technology, is the major meters device of whole system work, the information such as the hole deviation of responsible Real-time Collection drilling tool and flash tool face azimuth, thus control system carries out the operation such as well straightening, deflecting according to the information gathered.The measure error removing of inclinometer is subject to outside the factor impacts such as vibration, signal disturbing, and the alignment error of inclinometer also can bring error to inclinometer.In measurement, real well oblique angle is less, and the shared in the measurement ratio of error is larger.Cause measure error to elaborate to alignment error in document (vertical drilling tool inclinometer accurate correction is theoretical with experiment, petroleum journal the 33rd volume the 4th phase), and methodology proposed to its bearing calibration, but its belong to dispatch from the factory before bearing calibration.This method belongs to post-equalization method.
Summary of the invention
For defect of the prior art, the invention provides alignment error bearing calibration and alignment error means for correcting, thus solve measuring instrument that mechanical erection error causes and to take measurement of an angle offset issue, improve the certainty of measurement of inclinometer under The Small Well rake angle entrained by vertical drilling tool.
The present invention aims to provide alignment error bearing calibration, comprises, following steps:
In drilling well to be corrected, obtain according to imposing a condition and correct center of circle parameter;
Correction equation is generated according to described correction center of circle parameter;
According to described correction equation, error correction is carried out to the hole angle of actual acquisition.
In a preferred embodiment, described in drilling well to be corrected, obtain according to imposing a condition the step correcting center of circle parameter and comprise:
In drilling well to be corrected, according to imposing a condition, on the multiple spot of circumference, carry out the collection of flash tool face azimuth on multiple spot and hole angle;
Circle fit equation is obtained according to the flash tool face azimuth on described multiple spot and hole angle matching;
Obtain according to described round fit equation and correct center of circle parameter.
In a preferred embodiment, the described step according to the flash tool face azimuth on described multiple spot and hole angle matching acquisition circle fit equation comprises:
According to the flash tool face azimuth on described multiple spot and hole angle, carry out least square fitting, obtain circle fit equation.
In a preferred embodiment, on the multiple spot of place circumference, the step of carrying out the collection of flash tool face azimuth on multiple spot and hole angle comprises:
At 360 ° circumferentially, be a collection point with each 10 ~ 15 °, each collection point is carried out the collection of flash tool face azimuth and hole angle.
In a preferred embodiment, described in drilling well to be corrected, according to imposing a condition, on the multiple spot of circumference, the step of carrying out the collection of flash tool face azimuth on multiple spot and hole angle comprises:
In drilling well to be corrected, vertical drilling tool is arranged on the drilling tool support of drilling well;
According to the angle of inclination of setting, tilt described drilling tool support;
Rotate described vertical drilling tool on the multiple spot of circumference, carry out the flash tool face azimuth on multiple spot and hole angle.
In a preferred embodiment, described angle of inclination is 0.1 ° ~ 1 ° or 0.3 ° ~ 0.7 °.
In a preferred embodiment, described according to described correction equation the hole angle of actual acquisition carried out to the step of error correction after also comprise:
According to described correction equation and the hole angle after correcting, flash tool face azimuth is corrected.
Meanwhile, present invention also offers a kind of alignment error corrective system, comprise,
Center of circle acquiring unit, is configured in drilling well to be corrected, obtains correct center of circle parameter according to imposing a condition;
Correction equation acquiring unit, is configured to generate correction equation according to described correction center of circle parameter;
Error correction unit, is configured to carry out error correction according to described correction equation to the hole angle of actual acquisition.
In a preferred embodiment, described center of circle acquiring unit is also configured to:
In drilling well to be corrected, according to imposing a condition, on the multiple spot of circumference, carry out the collection of flash tool face azimuth on multiple spot and hole angle;
Circle fit equation is obtained according to the flash tool face azimuth on described multiple spot and hole angle matching;
Obtain according to described round fit equation and correct center of circle parameter.
In a preferred embodiment, described error correction unit is also configured to:
According to described correction equation and the hole angle after correcting, flash tool face azimuth is corrected.
Therefore compared with prior art, alignment error bearing calibration according to the present invention has the following advantages: reduce the requirement of machining error and installation accuracy after adopting the method, make in production and assembling process without the need to special concern precision.The error of therefore installing can be corrected by the method.And the implementation process of bearing calibration proposed by the invention is simple, be applicable to device dispatch from the factory after necessary data correction.Particularly when hole deviation is less, calibration result is particularly evident.
Accompanying drawing explanation
Fig. 1 is inclinometer schematic diagram in one embodiment of the present invention;
Fig. 2 is the block diagram of alignment error bearing calibration in one embodiment of the present invention;
Fig. 3 is fitting circle schematic diagram in one embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 ~ 3, invention is described in further detail.
As shown in Figure 1, whole vertical drilling tool by mandrel 1, outer sleeve 2, and be arranged on put outside non rotating electronics joint 4, outer sleeve 2 and mandrel 1 are interconnected by bearing 3, inclinometer 5 be arranged on electronics joint 4 on.Inclinometer is used for the parameters such as the hole angle of the drilling direction of air plug gauge 1.
As shown in Figure 2, in one embodiment of the present invention, bearing calibration process step is:
Step S101: support installing; Whole vertical drilling tool is arranged on the drilling tool support of drilling well;
Step S102: setting angle of slope is arranged; Jack is used to support that pin is raised by one of the drilling tool support of fixing drilling tool, drilling tool is made to tilt to set angle of inclination (as 0.5 °), angle of inclination occurrence does not retrain, as a kind of preferred embodiment of the present invention, its setting angle of inclination is preferably 0.1 ° ~ 1 °, and also can more preferably 0.3 ° ~ 0.7 °, thus be more conducive to follow-up adjustment, better counteracting can be given to mechanical erection error.
Step S103: multipoint acquisition; Continuous rotation drilling tool, often rotate to an angle (according to appointment 10 °) gather a flash tool face azimuth and hole angle (ρ, θ).As shown in Figure 2,3, wherein, hole angle is the angle of coordinate system Z ˊ axle and plumb line, and flash tool face azimuth is the vertical guide angle of coordinate system X ˊ axle and Z ˊ axle (when tilting for X ' Y ' and Z ' axle according to setting the former XYZ axle after inclined at inclination angles).Such as, be one group carry out data acquisition with 360 °, after gathering, data are as shown in Table 1:
Sequence number Hole angle (°) Flash tool face azimuth (°)
1. 0.43 187.2
2. 0.47 196.1
3. 0.51 201.9
4. 0.54 208.0
5. 0.57 213.7
6. 0.58 218.3
7. 0.59 223.3
8. 0.64 230.9
9. 0.63 236.2
10. 0.64 242.2
11. 0.64 247.3
12. 0.65 252.3
13. 0.64 256.6
14. 0.62 263.5
15. 0.61 268.2
16. 0.59 273.0
17. 0.55 278.6
18. 0.54 284.4
19. 0.50 291.3
20. 0.43 299.0
21. 0.41 305.4
22. 0.36 311.6
23. 0.32 319.6
24. 0.28 327.9
25. 0.22 340.9
26. 0.18 355.0
27. 0.14 20.3
28. 0.12 44.5
29. 0.13 74.4
30. 0.15 101.9
31. 0.17 121.3
32. 0.22 137.6
33. 0.26 145.5
34. 0.31 156.4
35. 0.35 167.3
36. 0.39 172.9
37. 0.43 183.2
Table one
Step S104: matching, acquisition center of circle parameter; By the data of one group of flash tool face azimuth gathering in step S103 and hole angle, carry out data fitting, fit equation is equation of a circle, and approximating method can adopt the approximating methods such as least square method, obtains center of circle parameter (ρ 1, θ 1).With table one data instance, as shown in Figure 3, adopt least square fitting circular, the polar coordinates of the center of circle parameter obtained, its representation is (0.2607,243.4).
Step S105: obtain center of circle fit equation; Correction equation is generated according to center of circle parameter in formula, ρ and θ is respectively hole angle and the flash tool face azimuth of actual measurement.The correction equation drawn with above-mentioned data instance is:
ρ 2+0.2607 2-2·0.2607·ρ·cos(θ-243.4)＝0.3751 2。
Step S106: carry out hole angle correction according to fit equation; Hole angle is corrected according to the correction equation obtained in step S105.
Hole angle r = | ρ 2 + ρ 1 2 - 2 · ρ 1 · ρ · cos ( θ - θ 1 ) | .
For above-mentioned image data, shown in the hole angle correction equation that draws be:
r＝｜ρ 2+0.2607 2-2·0.2607·ρ·cos(θ-243.4)｜
According to the hole angle (ρ, θ) gathered, be brought into the correction equation in formula, hole angle after the r calculated is and corrects.
Step S107: carry out the correction of flash tool angle according to fit equation; Correct flash tool face azimuth according to hole angle and correction equation, correction equation is:
Wherein, ρ 0for correcting the intersection point of circle and X-axis to the distance of initial point, the flash tool face azimuth correction equation drawn for this instance data table two is for correcting rear tables of data:
Sequence number Hole angle (°) Flash tool face azimuth (°)
1. 0.25 149.9
2. 0.25 162.9
3. 0.25 173.1
4. 0.25 183.3
5. 0.25 193.2
6. 0.25 200.5
7. 0.25 208.8
8. 0.25 222.6
9. 0.25 231.2
10. 0.25 241.4
11. 0.25 250.0
12. 0.25 258.2
13. 0.25 265.4
14. 0.25 277
15. 0.25 284.5
16. 0.25 292.5
17. 0.25 302.6
18. 0.25 310.9
19. 0.25 322.1
20. 0.25 336.3
21. 0.25 344.1
22. 0.25 354.2
23. 0.25 4.0
24. 0.25 13.4
25. 0.25 26.4
26. 0.25 36.3
27. 0.25 48.6
28. 0.25 57.4
29. 0.25 67.0
30. 0.25 77.2
31. 0.25 85.7
32. 0.25 96.8
33. 0.25 104.4
34. 0.25 115.1
35. 0.25 125.9
36. 0.25 133.8
37. 0.25 146.2
Table two
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to the protection domain of invention.

Claims (10)

1. alignment error bearing calibration, is characterized in that, comprises, following steps:
In drilling well to be corrected, obtain according to imposing a condition and correct center of circle parameter;
Correction equation is generated according to described correction center of circle parameter;
According to described correction equation, error correction is carried out to the hole angle of actual acquisition.
2. alignment error bearing calibration according to claim 1, is characterized in that, described in drilling well to be corrected, obtains the step correcting center of circle parameter comprise according to imposing a condition:
In drilling well to be corrected, according to imposing a condition, on the multiple spot of circumference, carry out the collection of flash tool face azimuth on multiple spot and hole angle;
Circle fit equation is obtained according to the flash tool face azimuth on described multiple spot and hole angle matching;
Obtain according to described round fit equation and correct center of circle parameter.
3. alignment error bearing calibration according to claim 2, is characterized in that, the described step according to the flash tool face azimuth on described multiple spot and hole angle matching acquisition circle fit equation comprises:
According to the flash tool face azimuth on described multiple spot and hole angle, carry out least square fitting, obtain circle fit equation.
4. alignment error bearing calibration according to claim 2, is characterized in that, on the multiple spot of place circumference, the step of carrying out the collection of flash tool face azimuth on multiple spot and hole angle comprises:
At 360 ° circumferentially, be a collection point with each 10 ~ 15 °, each collection point is carried out the collection of flash tool face azimuth and hole angle.
5. alignment error bearing calibration according to claim 2, is characterized in that, described in drilling well to be corrected, and according to imposing a condition, on the multiple spot of circumference, the step of carrying out the collection of flash tool face azimuth on multiple spot and hole angle comprises:
In drilling well to be corrected, vertical drilling tool is arranged on the drilling tool support of drilling well;
According to the angle of inclination of setting, tilt described drilling tool support;
Rotate described vertical drilling tool on the multiple spot of circumference, carry out the flash tool face azimuth on multiple spot and hole angle.
6. alignment error bearing calibration according to claim 5, is characterized in that, described angle of inclination is 0.1 ° ~ 1 ° or 0.3 ° ~ 0.7 °.
7. alignment error bearing calibration according to claim 1, is characterized in that, described according to described correction equation the hole angle of actual acquisition carried out to the step of error correction after also comprise:
According to described correction equation and the hole angle after correcting, flash tool face azimuth is corrected.
8. alignment error corrective system, is characterized in that, comprises,
Center of circle acquiring unit, is configured in drilling well to be corrected, obtains correct center of circle parameter according to imposing a condition;
Correction equation acquiring unit, is configured to generate correction equation according to described correction center of circle parameter;
Error correction unit, is configured to carry out error correction according to described correction equation to the hole angle of actual acquisition.
9. alignment error corrective system according to claim 8, is characterized in that, described center of circle acquiring unit is also configured to:
In drilling well to be corrected, according to imposing a condition, on the multiple spot of circumference, carry out the collection of flash tool face azimuth on multiple spot and hole angle;
Circle fit equation is obtained according to the flash tool face azimuth on described multiple spot and hole angle matching;
Obtain according to described round fit equation and correct center of circle parameter.
10. alignment error corrective system according to claim 8, is characterized in that, described error correction unit is also configured to:
According to described correction equation and the hole angle after correcting, flash tool face azimuth is corrected.
CN201410465494.0A 2014-09-12 2014-09-12 Alignment error bearing calibration and system Active CN104675385B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804722A (en) * 2016-03-10 2016-07-27 太原理工大学 Correction method for mining borehole clinometer probe tube

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59100812A (en) * 1982-12-01 1984-06-11 Nippon Denso Co Ltd Device for detecting bearing
CN1069570A (en) * 1991-08-13 1993-03-03 成都科技大学 Multi-hole coaxial error measuring method and device
CN101251368A (en) * 2008-03-26 2008-08-27 浙江大学 Method for detecting hub installing hole shape-location parameter based on picture recognition
CN101265804A (en) * 2008-05-06 2008-09-17 上海神开石油化工装备股份有限公司 Well drilling high precision gradient meter sensor perpendicular installation error compensation process
CN102278108A (en) * 2011-05-13 2011-12-14 重庆华渝电气仪表总厂 Calibration method for continuous measurement mode of small-bore directional gyro inclinometer
CN102996114A (en) * 2011-09-14 2013-03-27 王维 Inclined hole correction method of logging information

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59100812A (en) * 1982-12-01 1984-06-11 Nippon Denso Co Ltd Device for detecting bearing
CN1069570A (en) * 1991-08-13 1993-03-03 成都科技大学 Multi-hole coaxial error measuring method and device
CN101251368A (en) * 2008-03-26 2008-08-27 浙江大学 Method for detecting hub installing hole shape-location parameter based on picture recognition
CN101265804A (en) * 2008-05-06 2008-09-17 上海神开石油化工装备股份有限公司 Well drilling high precision gradient meter sensor perpendicular installation error compensation process
CN102278108A (en) * 2011-05-13 2011-12-14 重庆华渝电气仪表总厂 Calibration method for continuous measurement mode of small-bore directional gyro inclinometer
CN102996114A (en) * 2011-09-14 2013-03-27 王维 Inclined hole correction method of logging information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105804722A (en) * 2016-03-10 2016-07-27 太原理工大学 Correction method for mining borehole clinometer probe tube

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