EMWD electromagnetic wave measurement system suitable for diamond core drilling
A measurement system and electromagnetic wave technology, applied in the field of diamond core drilling, can solve the problems of troublesome ground equipment wiring, inconvenient operation, inconvenient operation, etc., and achieve the effect of solving inconvenient wiring, improving transmission rate, and simple working principle
Pending Publication Date: 2021-01-01
BEIJING LIUHE GREATNESS TECH
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Problems solved by technology
[0003] This patent uses the drilling pipe, electrode rod and ground control circuit to realize the azimuth angle and zero line angle transmission signal of the core drilling downhole instrument. In actual operation, there are the following problems: the cost is relatively high, and the cable transmission is used. Special drill pipes need to be customized; on-site operation is inconvenient, and special logging vehicles and auxiliary tools are required on site, which is extremely inconvenient for operations in narrow mountainous areas; ground equipment wiring is troublesome, and downhole data is uploaded to the logging vehicle through cables, requiring Wiring to the driller's floor to realize the display of the driller
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "another end" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that ...
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The invention discloses an EMWD electromagnetic wave measurement system suitable for diamond core drilling. The EMWD electromagnetic wave measurement system comprises an underground device and a ground signal device, the underground device is in signal connection with the ground signal device, and the underground device comprises an exploring tube, a transmitting pup joint, an upper centralizer, alower centralizer, an upper bow plate assembly, a lower bow plate assembly, an inner insulating assembly and an insulating drill collar. According to the EMWD electromagnetic wave measurement system,the working principle is simple, the insulation transmission of two paths of signals of the transmitting pup joint is realized by additionally arranging the insulating drill collar and the inner insulating assembly, the EM electromagnetic wave wireless transmission mode is realized, the problem of poor signal quality caused by the problems of pump pressure, mud and the like when a mud pulse generator is adopted in the drilling process is solved, and the overall transmission rate is improved; and in addition, a wireless transmitting antenna is adopted on the ground to achieve signal transmission, and the problem of inconvenient wire arrangement is solved.
Description
technical field [0001] The invention relates to the technical field of diamond core drilling, in particular to an EMWD electromagnetic wave measurement system suitable for diamond core drilling. Background technique [0002] Chinese patent CN2039733U "orientation instrument for rock core drilling" discloses a kind of directional instrument for small-diameter core drilling, which is characterized in that it includes downhole drilling pipe, electrode rod and ground control circuit. The zero-line angle, and the structure is a magnetic needle compass compression type measuring device, and the control measurement device is in different states (measurement of azimuth, zero line angle, locking and stopping), and the structure is the conversion of the helical compression transmission of the triangular ballpoint pen type device, and the electrode base that is connected with the electrode rod to connect the downhole probe tube with the ground control line. The bridge, the bridge comp...
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Login to View More IPC IPC(8): E21B47/13E21B47/01E21B47/00
CPCE21B47/01E21B47/00
Inventor 冯建宇杨勇
Owner BEIJING LIUHE GREATNESS TECH