Non-contact high-precision array electromagnetic thickness gauge
An electromagnetic thickness gauge, non-contact technology, applied in the direction of electromagnetic measuring devices, using electromagnetic means, electric/magnetic thickness measurement, etc., can solve the problems of poor stability, easy to get stuck, inconvenient logging, etc., to achieve stability Good, great use flexibility, not easy to meet the effect of the card
Active Publication Date: 2017-11-28
XIAN SITAN INSTR
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Problems solved by technology
At present, the detection of in-service casing at home and abroad is usually based on the eddy current effect of the casing to measure the thickness change. Its structure is often a cage structure, which is inconvenient for well logging and easy to get stuck; at the same time, it has poor stability and is not applicable. in high temperature and high pressure oil and gas wells
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[0038] see figure 1 as well as figure 2 , is a typical logging hook-up diagram of a non-contact high-precision electromagnetic thickness gauge. When logging alone (such as figure 1 shown) mainly includes ground equipment 6, logging cable 7, cable head 1, two centralizers 2 and electromagnetic thickness gauge 3; and electromagnetic thickness gauge 3 and multi-arm caliper 4 are connected to form an instrument string, and the When combined logging (such as figure 2 shown), mainly includes ground equipment 6, logging cable 7, cable head 1, telemeter 5, three centralizers 2, multi-arm caliper 4 and electromagnetic thickness gauge 3, ground equipment 6 mainly includes cable car, Ground decoding platform and logging computer, etc.
[0039] see image 3 as well as Figure 7, is a schematic diagram of a typical structure of a non-contact high-precision electromagnetic thickness gauge. The instrument is composed of the electronic sub-section 8 of the electromagnetic thickness ga...
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The invention relates to a non-contact type high-accuracy array electromagnetic thickness gauge. The non-contact type high-accuracy array electromagnetic thickness gauge comprises an electromagnetic thickness gauge electronic short joint, an electromagnetic thickness gauge signal receiving short joint and an electromagnetic thickness gauge magnetic field exciting short joint which are sequentially connected, wherein the electromagnetic thickness gauge signal receiving short joint is a cage-free type array probe structure. The non-contact type high-accuracy array electromagnetic thickness gauge has the advantages that the layout is reasonable, the structure is simple, the surface of a tested oil casing is completely covered, the measuring accuracy is high, and the requirement of engineering measuring of high-temperature and high-pressure oil and gas wells is met.
Description
technical field [0001] The invention belongs to the field of thickness measurement of oil pipes and casing pipes, and relates to an electromagnetic steel pipe thickness measurement instrument, in particular to a non-contact high-precision array electromagnetic thickness measurement instrument capable of analyzing and evaluating damage conditions. Background technique [0002] The electromagnetic thickness gauge is an instrument for casing damage identification by measuring the relative thickness change of the casing, and its measurement data has a high measurement value for the damage of the casing in service. At present, the detection of in-service casing at home and abroad is usually based on the eddy current effect of the casing to measure the thickness change. Its structure is often a cage structure, which is inconvenient for well logging and easy to get stuck; at the same time, it has poor stability and is not applicable. in high temperature and high pressure oil and ga...
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IPC IPC(8): E21B47/00E21B47/12G01B7/06
CPCE21B47/085E21B47/12G01B7/10
Inventor刘征科于英强
OwnerXIAN SITAN INSTR