Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multi-functional communication control system for downhole instrument

A downhole instrument and control system technology, which is applied in wellbore/well components, measurement, earthwork drilling and production, etc., can solve the problems that the horizontal well section cannot be fed into the instrument, and achieve the reduction of development cost, saving of communication resources, and anti-interference strong effect

Pending Publication Date: 2017-05-31
SINOPEC JIANGHAN OILFIELD SERVICE CORP
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the development of deep oil and gas layers adopts horizontal drilling technology. Due to the difference between horizontal wells and conventional wells, the traditional technology of logging and workover tools that are suspended by gravity and fed by cables cannot realize the delivery to horizontal well sections. Requirements for entering the instrument

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-functional communication control system for downhole instrument
  • Multi-functional communication control system for downhole instrument
  • Multi-functional communication control system for downhole instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] refer to figure 1 , the present invention is composed of a digital modulation circuit and a digital demodulation circuit.

[0016] refer to figure 2 , the switch circuit is composed of JK flip-flop, NAND gate, transistor Q1 and Q2, capacitor C1, C2 resistor R1, R2, R3, R4, R5, R6, R7, R8, R9 and Zener diode D1 and D2, fast Recovery diode D3, D4 composition. The switch circuit is respectively turned on when the output signal of the counter is "0" and "1", and finally the output signal is modulated into the logging cable through the DC blocking capacitor to realize the carrier communication.

[0017] refer to image 3 , the filter circuit is composed of a low-pass filter circuit with gain and a pass filter circuit. U3 and its peripheral circuits constitute a low-pass filter circuit with gain, and U4 and its peripheral circuits constitute a pass filter circ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a multifunctional communication control system for downhole instrument. The 2FSK (binary frequency shift key control) digital modulation and demodulation mode is used. Firstly the signals sent from the ground to the downhole instrument pass through a modulation circuit made of a crystal oscillator, a counter, a switch circuit and the like to be modulated. The modulated signals are transmitted to the downhole instrument through logging cable carriers. The signals in the logging cable pass through a demodulation circuit made of a DC current isolating capacitor, an over-voltage protection circuit, a power amplifying low pass filter, a band pass filter, phaselocked loop and the like, and the signals sent from the downhole are modulated to achieve the communication between a ground control system and the downhole instrument. The circuit is simple and practical, the use of the digital modulation and demodulation method and the use of the phaselocked loop technology to demodulate the signals can bring good stability and anti-interference capability.

Description

technical field [0001] The invention relates to a design for realizing communication between a surface control system and downhole instruments, in particular to a multifunctional communication control system for downhole instruments. Background technique [0002] In recent years, as our demand for oil and the difficulty of oil exploration and development have increased, in order to increase the success rate of exploration and development and reduce development costs. At present, most of the development of deep oil and gas layers adopts horizontal drilling technology. Due to the difference between horizontal wells and conventional wells, the traditional technology of logging and workover tools that are suspended by gravity and fed by cables cannot realize the delivery to horizontal well sections. into the instrument requirements. It is against this background that the horizontal well tractor emerges at the historic moment. [0003] When designing a horizontal well tractor, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12
CPCE21B47/12
Inventor 廖勇杨国圣饶海涛张志华王维石元会
Owner SINOPEC JIANGHAN OILFIELD SERVICE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com