Continuous Coring Technology in Inclination Drilling & Horizontal Drilling

High-precision directional drilling technology has got to be a very high level in petroleum drilling and utilization exploitation of soluble mineral resources and some other aspects.Similarly,wire-line coring technology has also been mature after decades of application.Combining these two technologies,some difficulties in investigation,such as exploration in irregular sedimentary deposit and blind deposit could be settled.The paper discusses the application area,key technology and innovation point of the combination of directional drilling and wire-line coring;briefly introduces the related drill tool assembly and technical parameters.