Abstract Wellbore instability is frequently encountered in the process of shale oil drilling. Due to anisotropic strength characteristics shale, most conventional models are not suitable for wellbore stability analysis layered formation. In this paper, taking continental north Songliao Basin as research object, elasticity and parameters measured experimentally. Based on pore elastic mechanics, ...

With the rapid growth of oil and gas storage, transportation, pipeline industries, it is necessary to improve construction process pipelines. By combining technical advantages horizontal directional drilling pipe jacking construction, direct laying method suitable for crossing in different strata gas, water conservancy hydropower, municipal industries due its less land, high speed, reversibilit...

The aim of this study is to develop a program compare directional survey models and select the most accurate. When drilling well, actual route well must be regularly checked ensure that it in agreement with planned route. This done by measuring position at constant intervals. A was established used for five methods (Minimum Curvature, Tangential, Angle Averaging, Balanced Radius Curvature) path...

The oil industry uses geomagnetic field information to aid directional drilling operations when drilling for oil and gas offshore. These operations involve continuous monitoring of the azimuth and inclination of the well path to ensure the target is reached and, for safety reasons, to avoid collisions with existing wells. Although the most accurate method of achieving this is through a gyroscop...

Thin coal seam mining is a development direction to solve the problem of energy supply at this stage, which cannot be realized by small working space, low automation, and drilling deviation. In paper, nonlinear adaptive backstepping controller based on disturbance observer proposed used auger for position tracking control achieve directional drilling. Firstly, dynamic model deflection mechanism...