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

Small-diameter directional gyro inclinometer for drilling

A gyro inclinometer and small-caliber technology, which is applied in the directions of surveying, earthwork drilling and production, wellbore/well components, etc., can solve the problems that cannot be realized, achieve the goal of increasing oil production rate, wide application range, and avoiding blind perforation Effect

Inactive Publication Date: 2011-08-03
CHONGQING HUAYU ELECTRIC GRP
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this inclinometer sensor is reliable, it requires that there be no ferromagnetic material around the fluxgate
However, the old well has casing, which cannot provide a good non-magnetic environment for the inclinometer, so it is impossible to measure the borehole trajectory of the old well by using the fluxgate.
On the other hand, all current gyro inclinometers have a caliber of more than Φ60mm and a pressure resistance of 10Mp

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
  • Small-diameter directional gyro inclinometer for drilling
  • Small-diameter directional gyro inclinometer for drilling
  • Small-diameter directional gyro inclinometer for drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] A small-diameter directional gyro inclinometer for drilling, including two parts: an uphole control device and a downhole measurement device; the uphole control device is composed of a computer and a control unit, connected to the downhole measurement device through a cable, and the computer tracks and displays the feedback information of the downhole measurement device in real time . like figure 1 As shown, the downhole measurement instrument includes an inertial sub-joint based on a flexible gyro, related electronic components and a communication module, consisting of a bridle 1, a centralizer 2, an acquisition and telemetry sub-joint 3, a gyroscope inertial sub-joint 4, and a weighted short-circuit 6 , shock absorber 7 and lead shoe 8 to form. The dynamic tuning gyro is composed of the following components: gyro rotor, flexible joint, torquer, sensor, hysteresis motor and sealed shell. A pair of ball bearings are installed on the gyro base to support the high-speed...

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

PropertyMeasurementUnit
Caliberaaaaaaaaaa
Login to View More

Abstract

The invention provides a small-diameter directional gyro inclinometer for drilling. The small-diameter directional gyro inclinometer consists of an aboveground control device and an underground measurement device. The underground measurement device comprises an inertial short section based on a flexible gyro, wherein the inertial short section of the gyroscope includes a sensor consisting of two small flexible gyros with two degrees of freedom and three orthogonal quartz accelerometers; the two small flexible gyros with two degrees of freedom are orthogonal to each other and are connected with each other through a rotary frame; the three orthogonal quartz accelerometers are connected with one another through the rotary frame; and the gyros and the accelerometers are directly mounted on an inertial body through a location plane to constitute an inertial measurement assembly which is supported on a casing through a pair of bearings. The angles of the inclinometer in the three axial directions can be obtained by resolving an inertial navigation equation during logging so as to obtain the real-time well measurement information and output the azimuth information of an oil well. The small-diameter directional gyro inclinometer has the advantages of small size, low cost, high accuracy, high measurement speed, continuity in measurement, high reliability, high resistance to temperature and pressure, and wide application range.

Description

technical field [0001] The invention relates to a small-diameter directional gyro inclinometer for petroleum logging and geological exploration. [0002] Background technique [0003] Directional drilling is one of the important technologies for oil and gas development, and it has been applied in some developed countries abroad. The inclinometer and direction instrument used in directional drilling include various magnetic instruments and frame type gyro instruments. However, the measurement of small-diameter drilling has not met the requirements. Especially in our country, the magnetic instruments (such as fluxgates) which are still widely used in our country are affected by the geological environment and the surrounding ferromagnetic material environment, so the measurement accuracy is very low, and they cannot even be used. The general frame-type gyro instruments not only have low accuracy, but also have large diameter , using front-to-back alignment, calibration is al...

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
IPC IPC(8): E21B47/12E21B47/022
Inventor 谢箭夏明泽林萍王福亮李红良
Owner CHONGQING HUAYU ELECTRIC GRP
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