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Near-bit geosteering drilling system

A geosteering, near-drilling technology, which is applied in the field of oil and gas exploration, can solve the problems of near-drilling sub-section detachment, affecting the drilling of the drill bit, unstable wireless signal transmission, etc., to achieve a wide range of applications, improve stability, and avoid detachment Effect

Pending Publication Date: 2020-12-18
DEZHOU UNITED GASOLINEEUM MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current measurement-while-drilling system and logging-while-drilling system, the collected information is sent to the downhole signal receiving system through wireless transmission. Signal transmission is unstable
In addition, in the current measurement-while-drilling system and logging-while-drilling system, the near-bit measurement sub and the screw drilling tool adopt a split design to adapt to different screw drilling tools. However, when the split design is adopted, the screw drilling tool During the drilling process, there is a risk of detachment of the measuring sub near the drill bit, which affects the drilling of the drill bit

Method used

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Embodiment Construction

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0038] A near-bit geosteering drilling system disclosed in the present invention integrates the near-bit measuring nipple 20 with the screw drilling tool 10, so that the screw drilling tool 10 can drill normally, and at the same time adopts the method of wired signal transmission, nearly The information measured by the drill bit measuring sub-joint 20 is transmitted to the surface information processing system 50, which improves the stability of information transmission.

[0039] Such as figure 1 As shown, it is a near-bit geosteering drilling system disclosed by the present invention, which includes a screw drilling tool 10, a near-bit measurement sub 20, a downhole receiving sub 30, an MWD downhole sub 40 and a surface information processing system 50, Among them, the screw drillin...

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Abstract

The invention discloses a near-bit geosteering drilling system. The near-bit geosteering drilling system comprises a screw drilling tool connected with a bit, a near-bit measuring short section integrated with the screw drilling tool, an underground receiving short section, an MWD underground short section and a ground information processing system, wherein the near-bit measuring short section obtains near-bit geological parameter information and track parameter information and transmits the information to the underground receiving short section in a wired transmission mode; and the underground receiving short section forwards the received information to the MWD underground short section, the MWD underground short section classifies and encodes the information and generates regular mud pressure change signals, and the ground information processing system collects the mud pressure change signals and processes the mud pressure change signals so as to display corresponding information. The near-bit measuring short section and the screw drilling tool are integrated, so that the screw drilling tool can normally drill, and meanwhile the wired signal transmission mode is adopted, so thatthe information transmission stability is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploration, in particular to a geosteering drilling system near a drill bit. Background technique [0002] Oil well logging is an essential technical service component of drilling engineering in the process of oil and gas exploration and development. The conventional logging tools used for measurement are all post-drilling measurements, which cannot effectively analyze and control wellbore trajectory in real time. With the demand for production, engineers and technicians are required to understand the changes of wellbore trajectory and formation information in a timely manner, and adjust their posture in time, especially for identifying thin oil layers and improving drilling efficiency, which is of great significance. With the continuous development of downhole measurement technology, measurement while drilling (MWD, MeasurementWhile Drilling) and logging while drilling (LWD, Lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04E21B7/06E21B47/00E21B47/022E21B47/13
CPCE21B7/04E21B7/064E21B47/022E21B47/00
Inventor 朱杰李涛于广海程贵华王冬梅闫志文宋志磊
Owner DEZHOU UNITED GASOLINEEUM MACHINERY
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