In order to calculate connecting structures connected by sheared fasteners,this paper proposes two—dimension fastener element simulating sheared fasteners.

This paper introduces the importance of cementing and illustrates the necessity and development histor)' of cement bond evalualion.

It has been the major technical problem for the petroleum industry to succeed in making the filter cakes from cementing fluid and drilling fluid solidified together.

For the hardening process of the stabilized soil,a new structural model of stabilized soil was proposed that the structure formation of stabilized soil included soil particle cementing and pore filling.

Discussion on measures to improve the interface cementation quality of cement sheath.;

The coarse clastic rock of the braided channel of the fan-delta plain is formed when sedimentary water body is in the salinity stage of active tectonic period, the cotemporaneous cementation is intense and the cementation of the carbonate and sulphate has intense packing action in eogenetic stage of shallow buried.

Thus the interface cementation performances of slag MTC slurry and conventional slurry under the conditions of no cake,conventional drilling fluid cake and multifunctional drilling fluid cake were systematically compared and the reason of mud cake solidification was analysed.

Applying the method of mixing some ordinary portland cement into soil sample, structrued soil with different cemented strength and initial void ratio is.

By putting some amount of cement into soil sample, structured soil with macro-pores is prepared.

Tests are done to research waste-rock-cemented-mass,strength and the velocity of longitudinal wave(v_p)are tested in different proceed.