Geometry steerable drilling system driven by liquid and gas phase drilling media rotary disc

A technology of geosteering and medium, which is applied in the directions of driving devices, directional drilling, and drilling equipment for drilling in boreholes, and can solve problems such as adverse effects of underbalanced drilling technology

Inactive Publication Date: 2010-06-16
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above problems have adverse effects on the

Method used

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  • Geometry steerable drilling system driven by liquid and gas phase drilling media rotary disc
  • Geometry steerable drilling system driven by liquid and gas phase drilling media rotary disc
  • Geometry steerable drilling system driven by liquid and gas phase drilling media rotary disc

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specific Embodiment approach

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS: The implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0012] Such as figure 1 As shown, the overall technological process of the drilling system consists of a derrick 1, a drill floor 2, a blowout preventer 3, a surface casing 4, a borehole 5, a drill string 6, a downhole directional tool 7, a downhole directional tool 8, Drill bit 9, electromagnetic wave signal channel 10, blowout preventer electrode 13, ground electrode 14, electrical wire 15, electrical wire 16, riser pressure sensor 17, driller's display 18, communication cable 19, signal processing interface box 20 , a standard serial communication cable 21, and a general-purpose computer 22, wherein the labels "11" and "12" are respectively electromagnetic wave current equipotential lines and voltage equipotential lines.

[0013] Such as Figure 6-10As shown, the downhole directional tool is composed...

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Abstract

The invention relates to a geometry steerable drilling system driven by a liquid and gas phase drilling media rotary disc, which comprises two parts i.e. a ground part and an underground part, wherein the ground part consists of a derrick, a drilling floor, a blowout prevention device, a blowout prevention device electrode, a ground electrode, an electrical conductor, a vertical pipe pressure sensor, a drilling floor driller display, a drilling floor communication cable, a signal processing interface box, a standard serial communication cable and a universal computer system; and the underground part consists of an underground while-drilling directional tool and an underground while-drilling directional instrument. The geometry steerable drilling system driven by the liquid and gas phase drilling media rotary disc can use both a pure liquid phase and mixture media of a pure gas phase or the liquid phase, not only can be used for guide drilling of a rotary disc, but also can be used for measuring a formation natural gamma and the resistivity of the rotary disc while drilling and is suitable for popularizing and applying in petroleum drilling engineering.

Description

Technical field: [0001] The invention relates to a drilling system used in petroleum drilling engineering, which belongs to the category of petroleum drilling technology. Background technique: [0002] The use of underbalanced drilling technology to drill horizontal wells and extended-reach wells is a requirement for oilfield development. For horizontal wells and extended-reach wells, from the kickoff point to before entering the oil layer, there is a section with a large inclination that requires directional drilling, and then the drilling of the horizontal section entering the oil layer. Generally, pure liquid phase drilling medium (pure mud) is used in highly deviated well sections. The ideal supporting tools and instruments are mud pulse type wireless measuring while drilling and screw drilling tools; gas-liquid mixed medium or pure mud is used after entering the horizontal section of the oil layer. For gas phase drilling medium, the corresponding supporting tools and i...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B3/04E21B4/04E21B47/00E21B49/00E21B47/18
Inventor 吴智中
Owner CNPC GREATWALL DRILLING ENG
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