CN103334736B - A kind of measurement while drilling exploring tube - Google Patents
A kind of measurement while drilling exploring tube Download PDFInfo
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- CN103334736B CN103334736B CN201310276372.2A CN201310276372A CN103334736B CN 103334736 B CN103334736 B CN 103334736B CN 201310276372 A CN201310276372 A CN 201310276372A CN 103334736 B CN103334736 B CN 103334736B
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Abstract
The present invention relates to a kind of measurement while drilling exploring tube, it includes inserting tube joint, inserting tube protection cylinder, power module, control module and measures pipe nipple；Inserting tube joint is arranged at one end of inserting tube protection cylinder, and inserting tube joint receives external power source supply；Power module, control module and measurement pipe nipple are each attached to inside inserting tube protection cylinder, and power module is used for external power source realizing level conversion and powering with measurement pipe nipple to controlling module；Measure to be configured with in pipe nipple and add table for three axles measuring earth gravitational field and measure three axis fluxgates in earth's magnetic field；Control module and is connected with measuring pipe nipple, be used for gathering and measure the data that obtain of pipe nipple measurement and calculate the tool-face data of measurement pipe nipple, then tool-face data be encoded and send out the control level signal with encoding data to outside by inserting tube joint.The present invention can the high-acruracy survey in implementation tool face and high rate data transmission, it is possible to meet the measurement requirement of downhole orientation power drilling tool tool-face kinetic-control system and other similar systems.
Description
Technical field
The present invention relates to a kind of measurement while drilling device, be specifically related to the measurement while drilling exploring tube of a kind of high-acruracy survey being capable of downhole tool face and high rate data transmission, belong to petroleum exploration field.
Background technology
At present, MWD (MeasureWhileDrilling, the measurement while drilling) system commonly used in oil drilling is mainly used in realizing the measurement in hole deviation, orientation and drilling tool face.Use the underground work of conventional mwd system, tool-face certainty of measurement is not high, (conventional mwd system tool-face certainty of measurement is ± 2.8 ° to transfer rate relatively slowly, transfer rate is update once for 14 seconds), when efficiency requirements is not high, it also is able to meet general control requirement, but is difficult to meet dynamic realtime and controls requirement.
Downhole orientation power drilling tool tool-face kinetic-control system is a set of drillng operation automatic control system.In order to reach the purpose of closed-loop automatic control, this system needs ground to realize obtaining high-precision drilling tool face rapidly, tool-face precision required for downhole orientation power drilling tool tool-face kinetic-control system is ± 0.1 °, and tool-face transfer rate to be substantially better than conventional mwd system.
As can be seen here, conventional mwd system tool-face certainty of measurement is unable to reach the requirement of downhole orientation power drilling tool tool-face kinetic-control system.And in order to improve the certainty of measurement of downhole tool face, then the conveying length of tool-face data must increase, but can cause that transfer rate is slack-off, thus affecting the realtime control of downhole orientation power drilling tool tool-face kinetic-control system.Therefore, the mwd system that precision and the transmission rate request of downhole tool planar survey are conventional cannot be met by downhole orientation power drilling tool tool-face kinetic-control system.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide the measurement while drilling exploring tube of high-acruracy survey and the high rate data transmission being capable of downhole tool face, it is possible to meet downhole orientation power drilling tool tool-face kinetic-control system to the certainty of measurement of downhole tool face and transmission rate request.
For achieving the above object, the present invention takes techniques below scheme: a kind of measurement while drilling exploring tube, it is characterised in that this measurement while drilling exploring tube includes inserting tube joint, inserting tube protection cylinder, power module, control module and measures pipe nipple；Described inserting tube joint is arranged at one end of described inserting tube protection cylinder, and described inserting tube joint receives external power source supply；Described power module, control module and measurement pipe nipple are each attached to inside described inserting tube protection cylinder, and described power module is used for external power source realizing level conversion and powering to described control module and measurement pipe nipple；It is configured with in described measurement pipe nipple and adds table for three axles measuring earth gravitational field and measure three axis fluxgates in earth's magnetic field；It is three mutually perpendicular acceleration transducers of sensitive direction that described three axles add table, and its certainty of measurement is 1 ‰ G, and wherein G is 9.8m/s2；The high-precision fluxgate that described three axis fluxgates adopt certainty of measurement to be 0.1 μ T；Described control module is connected with described measurement pipe nipple, it is used for gathering the data that described measurement pipe nipple measurements obtains the tool-face data calculating described measurement pipe nipple, then described tool-face data is encoded and sends out the control level signal with encoding data to outside by described inserting tube joint；Described control module adopts following coded system when described tool-face data are encoded:
1) described tool-face data are uploaded it is incorporated in a data sequence；
2) adding a tool-face status data before described data sequence, described tool-face status data includes type code position and the residing interval flag bit of tool-face of tool-face；
Wherein, described 1 bit of tool-face type code bit stealing, for specification tool face type: gravity tool-face or Magnetic tools face；
The residing interval flag bit of described tool-face takies i bit, interval for place, specification tool face coding, wherein i=1, and 2,3 ...；Described coding interval is by being angularly divided into 2 by 360 ° of tool-faceiIndividual fixing interval obtains；
3) after tool-face status data, several tool-face coding data are encoded according to below equation:
N=(alpha-beta) * 2n/ θ,
In formula, α is tool-face data；β is the interval reference value of coding；N is tool-face data bits；θ is the angle that coding interval comprises.
In a preferred embodiment, described power module is able to receive that direct current supply and three-phase alternating-current powered.
Due to the fact that and take above technical scheme, it has the advantage that 1, the pipe nipple of measuring of the present invention is integrated with the high accuracy that certainty of measurement is 1 ‰ G and adds table and high-precision fluxgate that certainty of measurement is 0.1 μ T, when being added table and high-precision fluxgate calculating gravity tool-face and magnetic tool-face by this high accuracy, it is ensured that the tool-face certainty of measurement of ± 0.1 °.2, the control module of the present invention adopts novel coding mode when tool-face data are encoded, such that it is able to while ensureing tool-face certainty of measurement, it is ensured that the transfer rate of tool-face.3, power module can receive direct current supply and three-phase alternating-current powered, makes measurement while drilling exploring tube go for various different underground work condition.As can be seen here, the present invention can the high-acruracy survey in implementation tool face and high rate data transmission, it is possible to meet the measurement requirement of downhole orientation power drilling tool tool-face kinetic-control system and other similar systems.
Accompanying drawing explanation
Fig. 1 is the structural representation of measurement while drilling exploring tube of the present invention；
Fig. 2 is the one coding interval division of measurement while drilling exploring tube of the present invention；
Fig. 3 is a kind of data sequence form of measurement while drilling exploring tube of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
Fig. 1 shows the measurement while drilling exploring tube 100 of the present invention, and this measurement while drilling exploring tube 100 includes inserting tube joint 1, inserting tube protection cylinder 2, power module 3, controls module 4 and measure pipe nipple 5.Inserting tube joint 1 is arranged at one end of inserting tube protection cylinder 2, and this inserting tube joint 1 is the interface that measurement while drilling exploring tube 100 is connected with external signal, and measurement while drilling exploring tube 100 receives external power source supply by inserting tube joint 1.Inserting tube protection cylinder 2 is high voltage bearing metal cylinder without magnetic, is used for holding and protecting internal power module 3, control module 4 and measure pipe nipple 5.Power module 3, control module 4 and measurement pipe nipple 5 are each attached to inserting tube protection cylinder 2 inside, and wherein power module 3 supplies for receiving external power source and realizes level conversion, to power to control module 4 with measuring pipe nipple 5.It is configured with three axles in measurement pipe nipple 5 and adds table and three axis fluxgate (not shown)s, be respectively used for measuring earth gravitational field and earth's magnetic field, and be converted to DC level by measuring the data obtained.Control module 4 and be connected with measuring pipe nipple 5, be used for gathering the DC level measuring pipe nipple 5 output and calculating.Obtain measuring the tool-face data of pipe nipple 5, then tool-face data be encoded and send out the control level signal with encoding data to outside by inserting tube joint 1.
In a preferred embodiment, power module 3 can receive direct current supply and three-phase alternating-current powered, makes measurement while drilling exploring tube 100 go for various different underground work condition.
In a preferred embodiment, three axles add table and refer to three mutually perpendicular acceleration transducers of sensitive direction, and it can adopt certainty of measurement to be that (G is 9.8m/s to 1 ‰ G2) high accuracy add table, by this high accuracy add table calculate gravity tool-face time, it is ensured that the tool-face certainty of measurement of ± 0.1 °.
In a preferred embodiment, the high-precision fluxgate that three axis fluxgates can adopt certainty of measurement to be 0.1 μ T, when calculating magnetic tool-face by this high-precision fluxgate, it is ensured that the tool-face certainty of measurement of ± 0.1 °.
While ensure that tool-face certainty of measurement, in order to ensure the transfer rate of tool-face, the control module 4 of the present invention adopts following coded system when tool-face data are encoded:
1) tool-face data are uploaded it is incorporated in a data sequence.
2) adding a tool-face status data before data sequence, this tool-face status data includes type code position and the residing interval flag bit of tool-face of tool-face.
Wherein, 1 bit of tool-face type code bit stealing, for specification tool face type: gravity tool-face or Magnetic tools face.
The residing interval flag bit of tool-face take i (i=1,2,3 ...) and individual bit, for coding interval, place, specification tool face.Coding interval is by being angularly divided into 2 by 360 ° of tool-faceiIndividual fixing interval obtains.In the present embodiment, 360 ° of tool-face are divided into 8 codings interval (as shown in Figure 2), then 000 is 0-45 ° of the first coding interval, and 001 is 45-90 ° of the second coding interval, by that analogy.
3) after tool-face status data, several tool-face coding data are encoded.
Wherein, each tool-face coding data of data sequence all encode according to below equation:
N=(alpha-beta) * 2n/ θ,
In formula, α is tool-face data；β is the interval reference value of coding, and the interval reference value of coding is the minimum tool face amount that coding is interval, for instance the reference value of the first coding interval 000 is 0 °；N is tool-face data bits；θ is the angle that coding interval comprises.
Owing to, after dividing coding interval, tool-face coding range in coding interval diminishes, and therefore precision can improve.In the present embodiment, 360 ° of tool-face are divided 8 coding intervals, tool-face encodes in the coding interval of 45 °, data sequence includes 1 tool-face status data and 3 tool-face coding data (as shown in Figure 3), therefore tool-face data bits is 9, namely can ensure that ± the encoding precision of 0.1 °.Such as the coding of tool-face 25.2 ° is calculated as follows:
(25.2-0)*29/ 45=287,
Namely the coding of tool-face 25.2 ° is exactly 287.
The present invention is after adopting above-mentioned coded system, and measurement while drilling exploring tube 100 can ensure that the high-acruracy survey in implementation tool face when the transfer rate of tool-face is basically unchanged.
The various embodiments described above are merely to illustrate the present invention, and wherein the structure of each parts, connected mode etc. all can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (2)
1. a measurement while drilling exploring tube, it is characterised in that this measurement while drilling exploring tube includes inserting tube joint, inserting tube protection cylinder, power module, control module and measures pipe nipple；
Described inserting tube joint is arranged at one end of described inserting tube protection cylinder, and described inserting tube joint receives external power source supply；
Described power module, control module and measurement pipe nipple are each attached to inside described inserting tube protection cylinder, and described power module is used for external power source realizing level conversion and powering to described control module and measurement pipe nipple；
It is configured with in described measurement pipe nipple and adds table for three axles measuring earth gravitational field and measure three axis fluxgates in earth's magnetic field；It is three mutually perpendicular acceleration transducers of sensitive direction that described three axles add table, and its certainty of measurement is 1 ‰ G, and wherein G is 9.8m/s2；The high-precision fluxgate that described three axis fluxgates adopt certainty of measurement to be 0.1 μ T；
Described control module is connected with described measurement pipe nipple, it is used for gathering the data that described measurement pipe nipple measurements obtains the tool-face data calculating described measurement pipe nipple, then described tool-face data is encoded and sends out the control level signal with encoding data to outside by described inserting tube joint；
Described control module adopts following coded system when described tool-face data are encoded:
1) described tool-face data are uploaded it is incorporated in a data sequence；
2) adding a tool-face status data before described data sequence, described tool-face status data includes type code position and the residing interval flag bit of tool-face of tool-face；
Wherein, described 1 bit of tool-face type code bit stealing, for specification tool face type: gravity tool-face or Magnetic tools face；
The residing interval flag bit of described tool-face takies i bit, interval for place, specification tool face coding, wherein i=1, and 2,3 ...；Described coding interval is by being angularly divided into 2 by 360 ° of tool-faceiIndividual fixing interval obtains；
3) after tool-face status data, several tool-face coding data are encoded according to below equation:
N=(alpha-beta) * 2n/ θ,
In formula, α is tool-face data；β is the interval reference value of coding, and it is the minimum tool face amount that coding is interval；N is tool-face data bits；θ is the angle that coding interval comprises.
2. a kind of measurement while drilling exploring tube as claimed in claim 1, it is characterised in that described power module is able to receive that direct current supply or three-phase alternating-current powered.
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| US6736222B2 (en) * | 2001-11-05 | 2004-05-18 | Vector Magnetics, Llc | Relative drill bit direction measurement |
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Patent Citations (7)
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| CN101713286A (en) * | 2009-11-04 | 2010-05-26 | 中国石油大学(北京) | Electromagnetic system for detecting distance between adjacent wells while drilling |
| CN101799558A (en) * | 2010-03-19 | 2010-08-11 | 中国石油大学(北京) | Electromagnetic surveying system while drilling of adjacent-well parallel intervals |
| CN101806210A (en) * | 2010-04-13 | 2010-08-18 | 中国石油大学(北京) | System using solenoid groups to achieve electromagnetic guiding distance measurement while drilling |
| CN101852078A (en) * | 2010-06-08 | 2010-10-06 | 中国石油大学(北京) | Electromagnetic distance measurement guide system for double solenoid set during drilling |
| CN101915061A (en) * | 2010-07-21 | 2010-12-15 | 北京航空航天大学 | Alternating magnetic field guiding device |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: Goaltech Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation Co-patentee before: Goaltech Co., Ltd. |
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Effective date of registration: 20191216 Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC research institute limited liability company Patentee before: China Offshore Oil Group Co., Ltd. Co-patentee before: Goaltech Co., Ltd. |
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