Testing device and method for simulating offshore bidirectional electromagnetic measurement-while-drilling signal down transmission

Abstract

The invention provides a testing device for simulating offshore bidirectional electromagnetic measurement-while-drilling signal down transmission, and relates to the technical field of petroleum and underground mine directional drilling. The testing device comprises a box body, a sleeve, a transmitting electrode, an upper drill rod, an insulating joint, a lower drill rod, a signal generator and a signal receiver. The box body is used for placing a simulated ocean; one end of the insulating joint is connected with the lower drill rod; one end of the sleeve is used for being inserted into a simulated upper stratum; the upper drill rod is used for being inserted into the sleeve, and the lower end of the upper drill rod is connected with the insulating joint; a positive electrode and a negative electrode of the signal generator are electrically connected with the upper end of the upper drill rod and the transmitting electrode respectively; and a positive electrode and a negative electrode of the signal receiver are electrically connected with the lower end of the upper drill rod and the lower drill rod respectively. The invention further provides a testing method for simulating offshore bidirectional electromagnetic measurement-while-drilling signal down transmission. Influence factors of bidirectional electromagnetic measurement-while-drilling signal down transmission in offshore drilling can be effectively explored.

Description

technical field [0001] The invention relates to the technical field of directional drilling in petroleum and geological mines, in particular to a test method for simulating the down-transmission of two-way electromagnetic measurement-while-drilling measurement signals at sea. Background technique [0002] Electromagnetic measurement while drilling is an important technology to obtain downhole parameters in real time and monitor hole trajectory during drilling. Compared with mud pulse measurement while drilling, electromagnetic measurement while drilling technology has the advantages of not being limited by the circulating medium and the working state of the pump. Two-way electromagnetic measurement while drilling is based on the one-way electromagnetic measurement while drilling, which can control the state of the downhole signal transmission module according to the needs. application. [0003] There are many factors affecting the down-transmission of two-way electromagneti...

AI Technical Summary

Problems solved by technology

[0003] In offshore drilling, there are many factors affecting the down-transmission of two-way electromagnetic measurement-while-drilling signals. It is necessary to design test methods to obtain the influence rules and then guide the research and applicat

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