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Communication device for while-drilling stratum evaluation and geological guidance system

A technology of geosteering and communication devices, applied in the field of drilling operations, can solve problems such as complex mechanical design and increased construction difficulty, and achieve the effects of increasing flexibility, eliminating the risk of mud erosion, and eliminating unreliability and potential safety hazards

Pending Publication Date: 2019-07-19
杭州丰禾石油科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing measurement-while-drilling and logging-while-drilling tool combinations use over-the-wire communication. The mechanical design of this wired communication method is complex and increases the difficulty of construction.

Method used

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  • Communication device for while-drilling stratum evaluation and geological guidance system
  • Communication device for while-drilling stratum evaluation and geological guidance system
  • Communication device for while-drilling stratum evaluation and geological guidance system

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Such as figure 1 As shown, the MWD instrument 4 is installed in the middle of the annular water hole 5 of the non-magnetic drill collar 1, and is used to monitor the real-time posture of the downhole drilling tool, and transmit the measured data to the ground in real time in the form of mud pulse waves through the mud pulse generator system. The LWD instrument 8 is installed at the lower end of the non-magnetic drill collar 1 for real-time measurement ...

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Abstract

The invention provides a communication device for a while-drilling stratum evaluation and geological guidance system. A measure while drilling (MWD) instrument end antenna and an MWD instrument end wireless conversion module are mounted in a non-magnetic drill collar together with an MWD instrument, and the MWD instrument end wireless conversion module converts MWD wired transmitted signals into low-frequency electromagnetic wave signals to be transmitted outwards through the non-magnetic drill collar, and meanwhile receives transmitting signals from other logging while drilling (LWD) instrument ends; and LWD instrument end antennas and LWD instrument end wireless conversion modules are encapsulated in heads of the LWD instrument ends together, signals transmitted by the MWD instrument arereceived, and meanwhile data and commands of LWD instruments are converted into low-frequency electromagnetic wave signals to be sent to the MWD instrument through the non-magnetic drill collar. Cascade connection can be conducted under the condition of the various instruments, the flexibility of instrument matching is improved, and unreliability and potential safety hazards of wire connection and slip ring type connection are eliminated.

Description

technical field [0001] The invention relates to the technical field of drilling operations, in particular to a communication device for stratum evaluation while drilling and a geosteering system. Background technique [0002] Drilling operations are characterized by high investment and high risk. When drilling in areas with complex geological structures, the drilling trajectory often does not completely match the geological trajectory, and it is even impossible to judge whether the drilled formation is the target formation or not. [0003] MWD (Measure While Drilling, measurement while drilling) instrument is mainly used to measure borehole trajectory parameters while drilling, including: inclination angle, azimuth angle, tool face angle and auxiliary parameters such as temperature. [0004] LWD (Logging While Drilling, Logging While Drilling) instrument not only includes the measurement parameters of MWD, but also measures geological parameters while drilling (such as: resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/13E21B47/18E21B49/00
CPCE21B47/13E21B47/18E21B49/00
Inventor 李立伟沈雄伟许林谢培邱海涛许骞贺挺挺刘帅
Owner 杭州丰禾石油科技有限公司
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