Near-bit multi-parameter underground while-drilling measurement and control system

Abstract

The invention discloses a near-bit multi-parameter underground measurement and control while drilling system and is composed of ground equipment and an underground assembly, wherein the underground assembly sequentially comprises a drill bit, a multi-parameter collecting, measuring and transmitting short section, a power drilling tool, a receiving and transmitting short section, a wireless communication short section, a non-magnetic drill collar and the like, wherein the measuring and transmitting short section is used for collecting data according to a preset time interval, storing the collected data to the storage module and transmitting the collected data to the signal receiving antenna, and transmitting a received signal to the receiving and transmitting short section through a communication medium formed between the screw power drilling tool and drilling fluid; the receiving and transmitting short section conducts wireless transmission in an electromagnetic coupling mode and transmits signals to the wireless communication short section, the wireless communication short section transmits the received signals to ground equipment through the mud pulse generator in a pulse signal mode, and a ground system conducts data processing and analysis. According to the real-time measurement and control system, the real-time change of underground engineering parameters can be monitored in real time and adjusted in real time, and drilling time efficiency is improved.

Description

technical field [0001] The invention relates to the field of downhole data wireless measurement while drilling in drilling engineering, in particular to a multi-parameter downhole measurement and control system while drilling near a drill bit. Background technique [0002] With the development of drilling technology, in order to further improve the drilling efficiency and oil and gas recovery rate of deep wells, ultra-deep wells and long horizontal wells, a near-bit drilling monitoring and control system has been developed. The successful development of the near-bit drilling monitoring and control system can effectively solve many problems encountered in the drilling process of deep wells and horizontal wells with long horizontal sections, reduce operational risks, improve operational efficiency, and can accurately obtain real-time measurements of bottomhole temperature, internal and external Annular pressure, vibration, WOB, torque, speed, bending moment and other data can ...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing monitoring and control systems while drilling cannot solve the measurement problems of multi-engineering parameters such as bottomhole temperature, internal and external annular pressure, triaxial vibration, bit pressure, torque, speed, and bending moment, and cannot realize big data of downhole data. mass storage and real-time transmission

In addition, the measuring pup joint is more complex in mechanical structure, which affects the reliability of downhole tools under the action of downhole complex stress

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