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Impacts of HDD Pullback Speed on the Stability of a Drill-Hole Wall
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Impacts of HDD Pullback Speed on the Stability of a Drill-Hole Wall
(1 College of Mechanical and Electronic Engineering, Southwest Petroleum University, Chengdu 610500; 2 Central South University, Changsha 410012; 3 Institute of Science and Technology of China Petroleum Pipeline, Langfang 065000; 4 Pipeline Branch of China National Petroleum Corporation, Langfang 065000)
Abstract The instability of a drill-hole wall, which has a strong impact on construction speed and causes an enormous loss of manpower, material, and financial resources, is very commonly encountered during horizontal directional drilling. Fluid-solid coupling simulation, which is absent in previous research, is undertaken to analyze the impacts of pullback speed on the stability of a drill-hole wall using Abaqus finite-element software. An appropriate pullback speed, which guarantees a stable drill-hole wall, is obtained after analyzing the impacts of the initial stress of the stratum and pullback speed on the stability of a drill-hole wall.
Abstract：
The instability of a drill-hole wall, which has a strong impact on construction speed and causes an enormous loss of manpower, material, and financial resources, is very commonly encountered during horizontal directional drilling. Fluid-solid coupling simulation, which is absent in previous research, is undertaken to analyze the impacts of pullback speed on the stability of a drill-hole wall using Abaqus finite-element software. An appropriate pullback speed, which guarantees a stable drill-hole wall, is obtained after analyzing the impacts of the initial stress of the stratum and pullback speed on the stability of a drill-hole wall.
2013, Vol. 50 