Rope salvaging type hydraulic compulsory coring driller

Abstract

The invention provides a rope salvaging type hydraulic compulsory coring driller. The driller comprises an outer pipe assembly and an inner pipe assembly. A spring card blocking head, a spring card chamber, an outer pipe, a reamer, a righting ring and a coring drilling head are up-down successively assembled in the outer pipe assembly, so an up-down through cavity is formed. The inner pipe assembly is arranged in the outer pipe assembly cavity. A salvaging spearhead assembly, a spring card positioning mechanism, an in-place informing mechanism, a compulsory coring differential mechanism, a core blocking alarming mechanism, a single action mechanism, an inner pipe and a core converging jaw assembly. The driller is characterized in that a ball throwing assembly and a differential assembly are arranged on the compulsory coring differential mechanism; the compulsory coring differential mechanism achieves blocking of an overcurrent channel of drilling fluid of a lower part driller in a wayof throwing a steel ball in the inner pipe; and through the hydraulic force, pressure in increased so the lower part driller generates differential displacement, and the core converging jaw assembly to bear force to carry out inwards converge, thereby finishing compulsory coring processes. According to the invention, objectives of improving recovery factor and drilling-in coring efficiency duringdrilling-in coring in loosed and damaged complex stratums are achieved.

Description

technical field

[0001] The invention relates to a core drilling tool, in particular to a rope fishing type hydraulic forced core drilling tool, which belongs to the technical field of drilling equipment. Background technique

[0002] In order to grasp the underground geological conditions, the method of drilling and coring is usually used to directly obtain real and reliable underground rock formation data. The wireline coring method has the advantages of high drilling efficiency, low labor intensity, low cost, and fewer drilling accidents, and is widely used in exploration and drilling fields such as solid mineral geological exploration, complex formation drilling, hydrogeological exploration, and oil drilling exploration. .

[0003] The core recovery rate is the most important indicator in drilling construction. When drilling and taking cores in complex strata such as loose, broken, poorly cemented, weak, and easy to erode, the core recovery rate is extremely low, and eve...

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