CN103334736A - Probing pipe capable of measuring while drilling - Google Patents
Probing pipe capable of measuring while drilling Download PDFInfo
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- CN103334736A CN103334736A CN2013102763722A CN201310276372A CN103334736A CN 103334736 A CN103334736 A CN 103334736A CN 2013102763722 A CN2013102763722 A CN 2013102763722A CN 201310276372 A CN201310276372 A CN 201310276372A CN 103334736 A CN103334736 A CN 103334736A
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Abstract
The invention relates to a probing pipe capable of measuring while drilling. The probing pipe capable of measuring while drilling comprises a probing pipe joint, a probing pipe protecting cylinder, a power supply module, a control module and a measuring short joint. The probing pipe joint is arranged at one end of the probing pipe protecting cylinder. The probing pipe joint is supplied by an outer power supply. The power supply module, the control module and the measuring short joint are fixed in the probing pipe protecting cylinder. The power supply module is used for performing level switch on the outer power supply and energizing the control module and the measuring short joint. A three-shaft fluxgate used for measuring a magnetic field and a three-shaft plus table for measuring an earth gravity field and are arranged in the measuring short joint. The control module is connected with the measuring short joint and used for collecting data which are obtained through measuring of the measuring short joint and calculating out data of a tool face of the measuring short joint. The data of the tool face are coded and a control level signal with the coded data is sent to the outside through the probing pipe joint. The probing pipe capable of measuring while drilling can measure the tool face with high precision and achieve high-rate transmission and meet the measuring requirements of a system for dynamically controlling a tool face of an orientation power drill under a shaft and other similar systems.
Description
Technical field
The present invention relates to a kind of measurement while drilling device, be specifically related to a kind of measurement while drilling exploring tube that can realize high-acruracy survey and the high rate data transmission of downhole tool face, belong to petroleum exploration field.
Background technology
At present, MWD (Measure While Drilling, the measurement while drilling) system that generally uses in the oil drilling is mainly used in realizing the measurement of hole deviation, orientation and drilling tool face.Use the underground work of conventional mwd system, the tool-face certainty of measurement is not high, (mwd system tool-face certainty of measurement commonly used is ± 2.8 ° to transfer rate slowly, transfer rate is to upgrade once in 14 seconds), under the less demanding situation of efficient, also can satisfy general control requirement, but be difficult to meet dynamic real-time control requirement.
Downhole orientation power drilling tool tool-face kinetic-control system is a cover drillng operation automatic control system.In order to reach the closed loop purpose of control automatically, this system needs ground to realize obtaining rapidly high-precision drilling tool face, the needed tool-face precision of downhole orientation power drilling tool tool-face kinetic-control system is ± 0.1 °, and the tool-face transfer rate will obviously be better than conventional mwd system.
This shows that mwd system tool-face certainty of measurement commonly used can't 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 transmission length of tool-face data must increase, but can cause transfer rate slack-off, thereby influences the control real-time of downhole orientation power drilling tool tool-face kinetic-control system.Therefore, downhole orientation power drilling tool tool-face kinetic-control system is that the mwd system of using always can't satisfy to precision and the transmission rate request of downhole tool planar survey.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide the high-acruracy survey that can realize downhole tool face and the measurement while drilling exploring tube of high rate data transmission, can satisfy downhole orientation power drilling tool tool-face kinetic-control system to certainty of measurement and the transmission rate request of downhole tool face.
For achieving the above object, the present invention takes following technical scheme: a kind of measurement while drilling exploring tube is characterized in that this measurement while drilling exploring tube comprises inserting tube joint, inserting tube protection tube, power module, control module and measurement pipe nipple; Described inserting tube joint is arranged at an end of described inserting tube protection tube, and described inserting tube joint receives external power source and supplies with; Described power module, control module and measurement pipe nipple all are fixed on described inserting tube and protect tube inner, and described power module is used for to external power source realization level conversion and to described control module and the power supply of measurement pipe nipple; Dispose to measure three three axis fluxgates that add table and measure the earth's magnetic field of earth gravitational field in the described measurement pipe nipple; Described control module is connected with described measurement pipe nipple, be used for gathering the data that described measurement pipe nipple measures and the tool-face data that calculate described measurement pipe nipple, then described tool-face data encoded and send out the control level signal of band coded data by described inserting tube joint to the outside.
In a preferred embodiment, described power module can receive direct current supply and three-phase alternating current power supply.
In a preferred embodiment, described three to add table be three mutually perpendicular acceleration transducers of sensitive direction, and its certainty of measurement is 1 ‰ G, and wherein G is 9.8m/s
2
In a preferred embodiment, described three axis fluxgates employing certainty of measurement is the high accuracy fluxgate of 0.1 μ T.
Described control module adopts following coded system when described tool-face data are encoded:
1) described tool-face data upload is incorporated in the data sequence;
2) before described data sequence, add a tool-face status data;
3) after the tool-face status data, several tool-face coded datas of encoding.
Described tool-face status data comprises type code position and the tool-face interval flag bit of living in of tool-face; Wherein, 1 bit of described tool-face type code bit stealing is used for specification tool Noodles type: gravity tool-face or Magnetic tools face; Described tool-face interval flag bit of living in takies i bit, is used between code area, specification tool face place, and i=1 wherein, 2,3, Between described code area by 360 ° of tool-face are divided into 2 by angle
iIndividual fixing interval obtains.
The described tool-face coded data of each of described data sequence is all encoded according to following formula:
N＝(α-β)*2
n/θ，
In the formula, α is the tool-face data; β is a reference value between the code area; N is the tool-face data bits; θ is the angle that comprises between the code area.
The present invention is owing to take above technical scheme, it has the following advantages: certainty of measurement that 1, measurement pipe nipple of the present invention is integrated is that the high accuracy of 1 ‰ G adds table and certainty of measurement is the high accuracy fluxgate of 0.1 μ T, when adding table and high accuracy fluxgate calculating gravity tool-face and magnetic tool-face by this high accuracy, can guarantee ± 0.1 ° tool-face certainty of measurement.2, control module of the present invention adopts the novel coding mode when the tool-face data are encoded, thereby can guarantee the transfer rate of tool-face when guaranteeing the tool-face certainty of measurement.3, power module can receive direct current supply and three-phase alternating current power supply, makes measurement while drilling exploring tube go for various underground work condition.This shows that high-acruracy survey and high rate data transmission that the present invention can the implementation tool face can satisfy the measurement requirement of downhole orientation power drilling tool tool-face kinetic-control system and other similar systems.
Description of drawings
Fig. 1 is the structural representation of measurement while drilling exploring tube of the present invention;
Fig. 2 is a kind of 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.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
Fig. 1 has shown measurement while drilling exploring tube 100 of the present invention, and this measurement while drilling exploring tube 100 comprises inserting tube joint 1, inserting tube protection tube 2, power module 3, control module 4 and measures pipe nipple 5.Inserting tube joint 1 is arranged at an end of inserting tube protection tube 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 by inserting tube joint 1 and supplies with.Inserting tube protection tube 2 is high voltage bearing no magnetic metal cylinder, is used for holding and protects inner power module 3, control module 4 and measure pipe nipple 5.Power module 3, control module 4 and measurement pipe nipple 5 all are fixed on inserting tube and protect 2 inside, and wherein power module 3 is used for receiving external power source and supplies with and realize level conversion, to power to control module 4 and measurement pipe nipple 5.Dispose three in the measurement pipe nipple 5 and add table and three axis fluxgate (not shown)s, be used for measuring earth gravitational field and earth's magnetic field respectively, and the data that measure are converted to DC level.Control module 4 is connected with measurement pipe nipple 5, is used for gathering DC level and the calculating of measuring pipe nipple 5 outputs.Obtain measuring the tool-face data of pipe nipple 5, then the tool-face data are encoded and by inserting tube joint 1 send out to the outside band coded data the control level signal.
In a preferred embodiment, power module 3 can receive direct current supply and three-phase alternating current power supply, makes measurement while drilling exploring tube 100 go for various underground work condition.
In a preferred embodiment, three add the table refer to three mutually perpendicular acceleration transducers of sensitive direction, it can adopt certainty of measurement is that (G is 9.8m/s to 1 ‰ G
2) high accuracy add table, when adding table and calculate the gravity tool-face by this high accuracy, can guarantee ± 0.1 ° tool-face certainty of measurement.
In a preferred embodiment, it is the high accuracy fluxgate of 0.1 μ T that three axis fluxgates can adopt certainty of measurement, when calculating magnetic tool-face by this high accuracy fluxgate, can guarantee ± 0.1 ° tool-face certainty of measurement.
When having guaranteed the tool-face certainty of measurement, in order to guarantee the transfer rate of tool-face, control module 4 of the present invention adopts following coded system when the tool-face data are encoded:
1) the tool-face data upload is incorporated in the data sequence.
2) add a tool-face status data before data sequence, this tool-face status data comprises type code position and the tool-face interval flag bit of living in of tool-face.
Wherein, 1 bit of tool-face type code bit stealing is used for specification tool Noodles type: gravity tool-face or Magnetic tools face.
Tool-face interval flag bit of living in take i (i=1,2,3 ...) individual bit, be used between code area, specification tool face place.Between the code area by 360 ° of tool-face are divided into 2 by angle
iIndividual fixing interval obtains.In the present embodiment, 360 ° of tool-face are divided between 8 code areas (as shown in Figure 2), then 000 is between first code area 0-45 °, and 001 is between second code area 45-90 °, by that analogy.
3) after the tool-face status data, several tool-face coded datas of encoding.
Wherein, each tool-face coded data of data sequence is all encoded according to following formula:
N＝(α-β)*2
n/θ，
In the formula, α is the tool-face data; β is a reference value between the code area, and a reference value is the minimum tool face amount between the code area between the code area, and for example 000 a reference value is 0 ° between first code area; N is the tool-face data bits; θ is the angle that comprises between the code area.
Because after dividing between the code area, the coding range of tool-face between the code area diminishes, so precision can improve.In the present embodiment, 360 ° of tool-face are divided between 8 code areas, tool-face between 45 ° code area in the coding, data sequence comprises 1 tool-face status data and 3 tool-face coded datas (as shown in Figure 3), therefore the tool-face data bits is 9, namely can guarantee ± 0.1 ° encoding precision.For example the coding of 25.2 ° of tool-face is calculated as follows:
(25.2-0)*2
9/45＝287，
The coding that is 25.2 ° of tool-face is exactly 287.
The present invention is after adopting above-mentioned coded system, and measurement while drilling exploring tube 100 can guarantee the high-acruracy survey of implementation tool face under the constant substantially condition of the transfer rate of tool-face.
The various embodiments described above only are used for explanation the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents and improvement of carrying out on the basis of technical solution of the present invention all should do not got rid of outside protection scope of the present invention.
Claims (7)
1. a measurement while drilling exploring tube is characterized in that, this measurement while drilling exploring tube comprises inserting tube joint, inserting tube protection tube, power module, control module and measurement pipe nipple;
Described inserting tube joint is arranged at an end of described inserting tube protection tube, and described inserting tube joint receives external power source and supplies with;
Described power module, control module and measurement pipe nipple all are fixed on described inserting tube and protect tube inner, and described power module is used for to external power source realization level conversion and to described control module and the power supply of measurement pipe nipple;
Dispose to measure three three axis fluxgates that add table and measure the earth's magnetic field of earth gravitational field in the described measurement pipe nipple;
Described control module is connected with described measurement pipe nipple, be used for gathering the data that described measurement pipe nipple measures and the tool-face data that calculate described measurement pipe nipple, then described tool-face data encoded and send out the control level signal of band coded data by described inserting tube joint to the outside.
2. a kind of measurement while drilling exploring tube as claimed in claim 1 is characterized in that, described power module can receive direct current supply and three-phase alternating current power supply.
3. a kind of measurement while drilling exploring tube as claimed in claim 1 or 2 is characterized in that, described three to add table be three mutually perpendicular acceleration transducers of sensitive direction, and its certainty of measurement is 1 ‰ G, and wherein G is 9.8m/s
2
4. as each described a kind of measurement while drilling exploring tube of claim 1 to 3, it is characterized in that it is the high accuracy fluxgate of 0.1 μ T that described three axis fluxgates adopt certainty of measurement.
5. as each described a kind of measurement while drilling exploring tube of claim 1 to 4, it is characterized in that described control module adopts following coded system when described tool-face data are encoded:
1) described tool-face data upload is incorporated in the data sequence;
2) before described data sequence, add a tool-face status data;
3) after the tool-face status data, several tool-face coded datas of encoding.
6. a kind of measurement while drilling exploring tube as claimed in claim 5 is characterized in that, described tool-face status data comprises type code position and the tool-face interval flag bit of living in of tool-face;
Wherein, 1 bit of described tool-face type code bit stealing is used for specification tool Noodles type: gravity tool-face or Magnetic tools face;
Described tool-face interval flag bit of living in takies i bit, is used between code area, specification tool face place, and i=1 wherein, 2,3, Between described code area by 360 ° of tool-face are divided into 2 by angle
iIndividual fixing interval obtains.
7. a kind of measurement while drilling exploring tube as claimed in claim 5 is characterized in that, the described tool-face coded data of each of described data sequence is all encoded according to following formula:
N=(α-β)*2
n/θ，
In the formula, α is the tool-face data; β is a reference value between the code area; N is the tool-face data bits; θ is the angle that comprises between the code area.
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| CN103334736B CN103334736B (en) | 2016-07-13 |
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| CN101915061A (en) * | 2010-07-21 | 2010-12-15 | 北京航空航天大学 | Alternating magnetic field guiding device |
| CN101929310A (en) * | 2010-07-21 | 2010-12-29 | 北京航空航天大学 | Active alternating magnetic field information-based method for guiding and positioning well drilling track |
| CN103061755A (en) * | 2011-10-19 | 2013-04-24 | 中国石油化工股份有限公司 | Short distance transmission system for wireless electromagnetic wave signals of downhole near bit and short distance transmission method |
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2013
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030085059A1 (en) * | 2001-11-05 | 2003-05-08 | Vector Magnetics Llc | Relative drill bit direction measurement |
| 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 |
| CN101929310A (en) * | 2010-07-21 | 2010-12-29 | 北京航空航天大学 | Active alternating magnetic field information-based method for guiding and positioning well drilling track |
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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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