Deviation rectification and reinforcement technique of inclined transportation corridor in one newly-built inclined shaft;

Design and practice of high-speed drivage in inclined shafts;

Ascertainment of the minimal obliquity in inclined shaft winding;

Method for making an inclined well synthetic seismogram.;

The research for the special inclined well construction technology through deposit;

Research on 3-D VSP geometry design for deviated well.;

Research and application of systematic lift techology for screw pump in deviated well;

Research and application of an optimized design of pumping system used in deviated wells;

Three-dimensional model for space reorientation of hydraulic fractures near deflecting well bore;

Therefore a separate-layer water injection technology through tubing and casing is developed especially for operation in deflecting wells and small-displacement wells,solving the problem of water injcction of two layers by one packer.

In the light of the problems of strongly worn situation between rod and case or case and tube,pumping rod easily dropping,pump's damage,pump's low efficiency and short period inspecting pump during the recovering oil process in deflecting wells,the technology of rod pump for deviated wells has been developed.

Research on borehole deviation in drilling anisotropy formations;

Effects of stress field in bottom hole on borehole deviation during gas drilling

Factors of affecting borehole deviation for air drilling and the technical application

Causes of well deviation during gas drilling and its control

But well deviation of air drilling is a problem in some place where drilling has no problem with mud.

The formation mainly consists of dolomite and features in complex lithology, which makes it difficult to control well deviation.