Transparent bushing tube for drilling and coring of soft formation

Abstract

The invention relates to drilling and coring tools, in particular to a transparent bushing tube for drilling and coring of soft formation. A bushing tube body is composed of a transparent tube made of hard polyvinyl chloride or acrylonitrile-butadiene-styrene polymer and a marker on the surface, the transparency is 85%-99%, and the visible problem that a rock core is isolated by the bushing tube is solved. A geological logging well and geological research personnel can see the continuous degree, the missing position and the breakage area of the inside rock core through the bushing tube, the length of the rock core is also determined, a sampling position can be directly designed on the bushing tube directly, and a qualified sample can be obtained quickly. The marker on the outer surface enables a coring and drilling site or a laboratory to quickly process the rock core, the problem of the directions of the top and the bottom of the rock core, the problem of the consistency of longitudinal cutting angles and the problem of chaos of the arraying order of the rock core from bottom to top are solved, the working strength of the geological logging well and the geological research personnel is reduced, human errors are avoided, and the working efficiency is improved. The transparent bushing tube for drilling and coring of soft formation is particularly suitable for conducting conventional or closed coring in the formations which are loose or poor in diagenesis and cementation.

Description

Technical field [0001] The invention relates to a drilling and coring tool, in particular to a transparent liner for drilling and coring in soft formations. Background technique [0002] In order to improve the quality of drilling coring and increase the yield of coring, the lining technology is often used in coring in soft formations, and its material is rigid polyvinyl chloride (hereinafter referred to as UPVC), acrylonitrile-butadiene-styrene polymer ( Hereinafter referred to as ABS), glass fiber and aluminum alloy pipes, these liners are opaque, when the liner filled with cores is lifted to the ground, the on-site geological logging personnel and geological researchers cannot see the condition of the core inside the liner, neither can Seeing the geological structure at the first time, it is impossible to determine the continuity of the core, the missing position, and the damaged area, and it is impossible to design the sampling position through the liner to quickly obtai...

AI Technical Summary

Problems solved by technology

This invisibility through the liner brings difficulties to core logging and geological research

[0003] Due to the needs of geological research and archiving, the core is often cut in half longitudinally, of which 1 / 3 half is used for non-destructive testing and image acquisition after being restored to the stratigraphic section and permanently preserved, and 2 / 3 half is used for sampling inspection However, since there is no mark similar to the cutting line on the liner, the cutting angle can only be chosen arbitrarily when cutting the section-by-section core vertically, which leads to confusion of the inclination and inclination of the rock strata and fractures, giving the Inconvenience to core description, geological observation and research, and even possible misjudgment

For the same reason, there are no other markings related to core processing on the liner. After cutting the liner containing the core at the coring site and laboratory, it is necessary to manually mark the arrangement sequence number, top and bottom of the core in the formation. Direction, length and other information will not only affect the speed of core logging and core processing during operation, but also may cause errors such as direction inversion and disordered order

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