The paper analyzes the rationality of increasing this voltage limitation value and the influences on engineering application,presents some countermeasure in respects of sheath protector,fabrication,traying and transportation of cable.

Pore-fractured tight reservoir protection in Qingxi oil field;

Study and application of reservoir protection technique for Tuo 74 fault block in Shengtuo oilfield.;

Reservoir sensibility experiment and reservoir protection technique of Yuedong structure.;

Study on reservoir protection technology during water injection of low permeability oilfield;

According to the formation properties of Jidong oilfield and for the purpose of environmental and reservoir protection,a suitable high-inhibited and dual-protection drilling fluid system with non-clay phase has been developed.

Coal seam as the CBM source and reservoir has different features with conventional oil and gas reservoir on reservoir characteristics and storage manners that have determined specialty of CBM well drilling,completion,reservoir protection,hydraulic fracturing and other techniques.

The effect of reinforced protective layer and its control;

Analysis of the effect of protective layer thickness on the performance of RC eccentric compressive member;

Porous protective layer of the automobile planar-type ZrO_2 oxygen sensor