System for controlling positioning arm of logging tool
A technology of control system and push arm, which is applied in the directions of surveying, wellbore/well components, earthwork drilling and production, etc. It can solve problems such as cable breakage, instrument failure, and instrument falling into the well, and achieves reliable switching, simple structure, and avoids The effect of the accident
Active Publication Date: 2010-04-28
CHINA NAT OFFSHORE OIL CORP +1
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, during the logging work, the instrument may fail, causing the push arm to be unable to retract. When the logging instrument is taken out of the well, it is likely to be blocked or stuck. In serious cases, if the cable is pulled forcibly, the cable will A major safety accident in which an instrument was broken and fell into a well
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] Such as figure 1 As shown, the present invention includes: a DC power supply module 1, a path switching module 2, a motor 3 and a control module 4, wherein:
[0026] The DC power supply module 1 generates DC power, and transmits the DC power to the motor 3 through the path switching module 2;
[0027] The path switching module 2 can switch between various circuits, and transmit the DC power delivered by the DC power supply module 1 to the motor 3 through one of the circuits;
[0028] The motor 3 operates after receiving the DC power delivered by the DC power supply module 1 through the channel switching module 2, and then pushes the push arm 8 to operate;
[0029] The control module 4 sends instructions to the channel switching module 2 according to the operator's needs, and controls the channel switching module 2 to switch between different circuits.
[0030] The present invention adopts the DC power supply module 1, the channel switching module 2, the motor 3 and th...
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
Login to View More Abstract
The invention provides a system for controlling the positioning arm of a logging tool. The system comprises a DC supply module, a channel switching module, a motor and a control module, wherein the DC supply module generates direct current and transfers the direct current to the motor via the channel switching module; the channel switching module is capable of switching among various loops and transferring the direct current transferred from the DC supply module to the motor via one loop therein; the motor receives the direct current transferred from the DC supply module via the channel switching module and actuates; and the control module sends commands to the channel switching module according to the requirements of operators, so as to control the channel switching module to switch among various loops. By using the DC supply module, the channel switching module, the motor and the control module, the invention can achieve the motor DC supply and help the control unit of the logging tool to achieve the reverse rotation of a motor through DC supply when the logging tool fails, thereby realizing the withdrawing of the positioning arm of the logging tool, facilitating the extraction of the logging tool from the well and preventing accidents.
Description
technical field [0001] The invention relates to a control system of a pushing arm of a well logging instrument. Background technique [0002] The logging instrument is an important downhole instrument. When a part of the logging tool is in operation, it needs to use the push arm to push against the well wall to achieve better logging effect. The instrument is removed from the well. However, during the logging work, the instrument may fail, causing the push arm to be unable to retract. When the logging instrument is taken out of the well, it is likely to be blocked or stuck. In serious cases, if the cable is pulled forcibly, the cable will A major safety accident in which the instrument was broken and fell into the well. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a control system that can control the pushing arm of the logging tool to retract the pushing arm of the logging tool when the logging tool breaks...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B49/00
Inventor 陈国栋宋滨滨王建红
Owner CHINA NAT OFFSHORE OIL CORP