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

Throw-measuring type downhole thermodetector and downhole cyclic temperature measurement system

A measurement system and thermometer technology, applied in drilling equipment, earthwork drilling, drill pipe, etc., can solve the problems of high risk, failure and waste in the construction process, etc., and achieve the effect of short heat conduction path and continuous temperature data

Inactive Publication Date: 2018-09-18
CHINA NAT OFFSHORE OIL CORP +1
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The well temperature measured by the WL wireline logging tool is similar to the LWD logging while drilling method, and the risk of wireline operations is particularly high in highly deviated wells or areas with complex environments. It has caused many risks and failure waste to the whole construction process.

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
  • Throw-measuring type downhole thermodetector and downhole cyclic temperature measurement system
  • Throw-measuring type downhole thermodetector and downhole cyclic temperature measurement system
  • Throw-measuring type downhole thermodetector and downhole cyclic temperature measurement system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The projecting-type downhole thermometer of this embodiment belongs to the projecting-testing instrument, does not need cables, is easy to operate, and can be directly put into the drill string. The instrument first detects and sets the working mode on the ground, and automatically records the current time and temperature information after starting to work. The depth calibration can use the ground software to record the corresponding relationship between the time and the current depth, or directly import the time and depth data provided by mud logging. , and finally get the corresponding curve of depth and bottom hole temperature.

[0052] The temperature sensor is a high-precision digital temperature sensor from AD Company, which can have better performance in a wide industrial temperature range and is packaged in LFCSP. It has a built-in bandgap temperature reference and a 13-bit ADC (Analog-to-Digital Converter, analog-to-digital converter), which can monitor and digit...

Embodiment 2

[0057] The function of each component of the downhole circulating temperature measurement system of the present embodiment is as follows:

[0058] Protective cylinder: carrying internal instruments, both ends are sealed to withstand the pressure of 140MPa downhole;

[0059] Internal temperature measurement core components: carrying circuit, battery, temperature sensor, to ensure rapid and reliable heat conduction between the temperature sensor and the protective tube;

[0060] The first centralizer, the second centralizer and the fishing head: ensure that the instrument can complete normal testing and fishing on the well;

[0061] Shock absorber: to ensure that the instrument is not damaged by shock and vibration, to ensure that internal instruments are not damaged by shock and vibration; to ensure that the battery is not damaged by shock and vibration;

[0062] Weighted short circuit: ensure that the instrument has a reasonable descending speed under different mud specific g...

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 provides a throw-measuring type downhole thermodetector and a downhole cyclic temperature measurement system. The throw-measuring type downhole thermodetector includes a protecting barrel, a circuit board and a sensor, wherein the circuit board and the sensor are arranged in the protecting barrel; a detecting window is arranged in the protecting barrel and the sensor measures the temperatures of a well cementation section medium by the detecting window; the circuit board saves the temperature information detected by the sensor and / or transfers the temperature information to ground equipment. The throw-measuring type downhole thermodetector is used for accurately measuring the temperature of downhole environment in the petroleum drilling industry, the condition that the sensoris in contact with the measuring medium directly is avoided, and the character that precision is not influenced by repetitive using of measuring apparatus of the petroleum measuring industry is achieved; drilling tool hydrophthalmia and well drilling construction procedure are not influenced; and the condition that the heat guiding path is the shortest is realized, the temperature measuring is protected effectively and the thermodetector is durable.

Description

technical field [0001] The invention relates to the technical field of deep-water well cementing, in particular to a projection-type downhole temperature measuring instrument and a downhole circulating temperature measuring system. Background technique [0002] Downhole mud circulation temperature is one of the key parameters to ensure the safety of cementing operations and the quality of cementing engineering, and directly affects the cementing slurry formula, cementing strength and waiting time. Especially for deep wells, the performance of cement slurry is very sensitive to temperature. If the temperature measurement is too low, the pumping time of the cement slurry will be seriously shortened, which may easily cause cementing accidents. If the temperature measurement is too high, the waiting time for setting will be prolonged, and even super retarded setting may occur. , the top of the cement column has no strength for more than ten days, delaying subsequent drilling ope...

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): E21B47/07E21B17/10
CPCE21B17/1042E21B47/07
Inventor 赵琥罗宇维宋茂林冯颖韬常宏伟陆永伟李占东王清顺
Owner CHINA NAT OFFSHORE OIL 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