Probe-type azimuth gamma probe for inclinometer and measuring method

Abstract

The invention discloses a probe-type azimuth gamma probe for an inclinometer and a measuring method. The probe-type azimuth gamma probe comprises an outer protection barrel and a copper joint which isin threaded connection with the outer protection barrel, and also comprises a righting glue sleeve, a gamma ray probe, a gamma shielding device, an embedded microprocessor system mounting framework,a high-voltage power supply, three gravity acceleration sensors, a temperature sensor, a damper and an embedded microprocessor system. A NaI crystal and a photomultiplier are provided for constructingthe gamma ray probe, wherein the gamma shielding device is made of a material capable of shielding gamma rays. The gamma shielding device is provided with a window to realize directional gamma detection. Three gravity acceleration sensors are combined for determining the position of the probe-type azimuth gamma in a stratum space, and determining the gamma detection direction of the probe-type azimuth gamma device, so that the problems of relatively complex structure, high production cost, inconvenience in transportation and low accuracy in an existing drill collar gamma structure are solved.

Description

technical field [0001] The invention relates to the technical field of drilling-while-drilling equipment for oil drilling, in particular to a probe-type azimuth gamma probe for an inclinometer while drilling and a measuring method. Background technique [0002] At present, gamma ray intensity is a parameter to characterize the characteristics of oil and gas reservoirs, and its value is quite different from that of non-oil and gas reservoirs. Azimuth gamma measurement equipment while drilling is a typical formation evaluation equipment, which has been widely used in oil drilling development. The azimuth gamma measurement equipment while drilling can identify the formation gamma value at a certain azimuth of the tool while drilling. Through the azimuth gamma parameters uploaded to the ground in real time, it can quickly and accurately judge whether the tool is hitting the target layer for measurement The background gamma radiation of the formation, evaluate the gamma radiatio...

AI Technical Summary

Problems solved by technology

When the existing Geiger-Miller tube sensors are installed, it is necessary to open an opening on the outer wall of the drill collar for the fixed installation of the Geiger-Miller tube sensors, and because the drill collar gamma structure is relatively complicated, the production cost is high, and the transportation is difficult. Convenient, and the connection method of the male and female slip rings of the Geiger-Miller tube sensor also has the problem of downhole virtual connection, which greatly affects the accuracy of measurement data

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