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Measurement-while-drilling two-way communication method and system thereof

A two-way communication and measurement-while-drilling technology, applied in the field of the two-way communication method and system of measurement-while-drilling, can solve problems such as inability to send data to the ground, and achieve the effect of improving data efficiency

Inactive Publication Date: 2013-06-12
XIAN SITAN INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It usually takes dozens of seconds to turn off the pump, and the system cannot send data to the ground during this time

Method used

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  • Measurement-while-drilling two-way communication method and system thereof
  • Measurement-while-drilling two-way communication method and system thereof
  • Measurement-while-drilling two-way communication method and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The invention provides a two-way communication method for measurement while drilling, which comprises the following steps:

[0031] 1) Obtain the real-time rotation speed of the downhole drill string; especially by measuring the tool face angle of the drilling tool to obtain the real-time rotation speed of the downhole drill string;

[0032] 1.1) Measure the current tool face angle of the drilling tool;

[0033] 1.2) Obtain the angular velocity of the drilling tool according to the current tool face angle of the drilling tool obtained in step 1.1);

[0034] 1.3) Calculate the current real-time rotation speed of the drill string according to the angular speed of the drilling tool obtained in step 1.2).

[0035] 2) Determine whether the real-time rotation speed of the downhole drill string is adjusted; if so, proceed to step 3); if not, keep the working mode unchanged;

[0036] 3) Determine whether the adjusted rotational speed of the downhole drill string is adjusted t...

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Abstract

The invention relates to a measurement-while-drilling two-way communication method and a system thereof. The method comprises the following steps: (1) obtaining a real-time rotating speed of an underground drill stem; (2) determining whether the real-time rotating speed of the underground drill stem is adjusted or not; and if yes, performing step (3); if not, exiting a communication process; and (3) determining whether the adjusted rotating speed of the underground drill stem is re-adjusted to a rotating speed before adjusting or not within a certain time; if yes, an underground logging instrument is used for transmitting communication data to ground; and if not, exiting the communication process. The measurement-while-drilling two-way communication method and the system thereof can realize two-way communication of a measurement-while-drilling system and improve data transmission efficiency of the system.

Description

technical field [0001] The invention belongs to the field of petroleum logging while drilling, and relates to a communication method and a system thereof, in particular to a two-way communication method and a system thereof for measurement while drilling. Background technique [0002] Common wireless signal transmission methods in measurement-while-drilling systems include electromagnetic wave, acoustic wave and mud pulse. Electromagnetic waves and acoustic waves are easily interfered by the external environment, and their transmission distance is limited, so the mud pulse method is the most widely used wireless transmission method at the drilling site. During the drilling of horizontal wells and directional wells, the measured drilling parameters and formation geological parameters are transmitted to the ground through the mud pulse generator for reference by drilling personnel. But the biggest disadvantage of this transmission method is that the transmission rate is low, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12
Inventor 曹海军李晓东
Owner XIAN SITAN INSTR
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