The Liaohe oil-field Company is a large state owned enterprise which mainly exploit and process petroleum and nature gas.
辽河油田是以石油、天然气勘探开发为主，油气加工、综合利用、多种经营为辅的国有特大型企业。
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They are contact measurement, which must produce a large error caused by the contact measurement, so may affect the exact position of some important parameters in the oil and gasfield development.
At present, large part of oilfield has gone into the medium-latter stage, the pressure of oil-gas well has been lower year after year, pouring and producing contradiction change into intensify.