Method for measuring position of radioactive guide instrument type double sleeve

A technology of double casing and guide instrument, applied in surveying, earthwork drilling, wellbore/well components, etc., can solve problems such as poor perforation accuracy, and achieve the effect of verifying accuracy
CN101749009AInactive Publication Date: 2010-06-23CNPC GREATWALL DRILLING ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CNPC GREATWALL DRILLING ENG
Publication Date
2010-06-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for measuring the position of radioactive guide instrument type double sleeve for dynamically testing oil field oil and water well oil pipe transmission type perforations, which is realized by an aboveground control system and an underground test system. A measuring device consists of a large sleeve, a small sleeve, a well-measuring cable, a gyroscope, a double gamma instrument and a radioactive guide instrument, wherein the gyroscope, the double gamma instrument and the radioactive guide instrument are connected with each other through the well-measuring cable. The measuring method comprises the steps of: firstly, changing radioactive isotope source of the double gamma instrument to be out of the instrument from the inner part of the lower end of the double gamma instrument; filling the radioactive isotope source in a self-made guide instrument to be sealed; connecting the guide instrument with a ground control system through the well-measuring cable; connecting the gyroscope in an assembly instrument with the double gamma instrument through a connecting device at the ground; correcting after connecting; and connecting the instrument with the ground control system through the well-measuring cable. The method solves the problem of the bad measurement accuracy of the existing positioning device in the prior art. The method can be widely used for dynamically testing the oil field oil and water well oil pipe transmission type perforations.
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Description

Technical field:

[0001] The invention relates to a method for measuring the azimuth of a radioactive guiding ritual double casing used for oilfield oil and water well tubing transmission type perforation dynamic testing. Background technique:

[0002] In order to be able to dynamically observe the dynamic changes of the downhole temperature field and pressure field in the steam development block, make the monitoring data real-time, continuous, three-dimensional, and long-term, so as to grasp the change of the temperature field and pressure field of the block reservoir in time, and understand the formation process of the reservoir steam chamber According to the progress of the steam front, the injection and production measures can be adjusted in real time to improve the development effect of steam flooding reservoirs. Welding the sucker rod next to the casing of the observation well, the casing and the sucker rod are lowered into the wellbore at the same time, the optical fib...

Claims

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