Evaluation of Rock Breaking Acceleration Effect of Torsional Impactor in Deep Formation
Middle-deep layers are the focus of further exploration and development of the Bohai oil-fields,but they face various challenges in the drilling process,and their characteristics such as high formation compressive strength,difficult rock breaking,low mechanical drilling speed and long drilling cycle lead to poor economics in the middle and deep exploration of the Bohai Sea.In order to solve the problems of serious choking of medium and deep drilling tools and slow me-chanical drilling speed,the torsion impactor speeding tool was introduced in the Bohai Oilfield,but there was still a lack of quantitative understanding of its speed-up mechanism.In order to quantitatively understand the mechanism of speeding up the tool,the torsion mechanics model of the torsion impactor was set up,and the rock-breaking process of the PDC drill bit under the tor-sion impulse conditions was simulated through the Abaqus finite element software to analyze the specific work of the rock-breaking under the conditions of static loading and torsion impulse.The results show that the rock-breaking efficiency can be increased by about 36％after the installation of the torque impactor.It has certain reference significance for the speed up and parameter opti-mization of medium and deep drilling in the Bohai Oilfield.
Torsional impactordeep formationacceleration effectmechanical specific energy
NETL
NSTL
万方数据
维普
