GRY-1型超高温干热岩地层钻孔测斜仪研制及应用

Development and Application of GRY-1 Borehole Inclinometer for Ultra-high Temperature Hot Dry Rock Drilling

摘要:

干热岩地层钻孔测斜技术是干热岩勘探和开发不可缺少的关键技术，然而现阶段地勘钻孔测斜技术已不能满足干热岩地层的钻孔测斜要求。其中孔底的高温高压是核心问题。为此，设计承压探管加无磁保温瓶的双层外管结构，采用先进的硬磁校准方法、选用耐高温元件、采用低功耗电路设计，研制了GRY-1型干热岩地层钻孔测斜仪，以满足高达280 ℃高温、孔深3000 m的超高温干热岩地层钻孔轨迹测量的要求。通过试验应用，证明其在干热岩地层中具有良好的适用性，可助力干热岩资源的勘探和开发。

Abstract:

Drilling-hole trajectory measurement is an indispensable technology of the exploration and development of HDR. However, this technology at present stage cannot meet the requirements of inclination measurement in HDR strata. High temperature and high pressure at the hole bottom is the key problem. For this reason, by the double-layer outer tube structure design with the pressure-bearing probe tube and non magnetic thermos bottle, the use of the advanced hard magnetic calibration, the selection of high temperature resistance elements and low-power circuit design, GRY-1 inclinometer is developed to meet the requirements of the drilling-hole in HDR strata at the temperature up to 280℃ and depth of 3000 meters. The practical results show that GRY-1 inclinometer has good applicability in HDR strata and can contribute to the exploration and development of HDR resources.