In-situ monitoring fidelity continuous coring tool for horizontal well

Abstract

The invention relates to an in-situ monitoring fidelity continuous coring tool for a horizontal well. The in-situ monitoring fidelity continuous coring tool comprises a safety assembly, a hexagonal differential reverse lifting mechanism, a suspension rotating assembly, an in-situ fidelity intelligent control assembly, a storage inner cylinder assembly, an outer cylinder and a coring drill bit, wherein the safety assembly, an upper outer centralizer, the outer cylinder, a lower outer centralizer and the coring drill bit are fixedly connected in sequence to form an outer cylinder assembly, the hexagonal differential reverse lifting mechanism, the suspension rotating assembly, the in-situ fidelity intelligent control assembly and the storage inner cylinder assembly are fixedly connected in sequence to form an inner cylinder assembly, the inner cylinder assembly is arranged in the outer cylinder assembly, and the inner cylinder assembly is connected to the outer cylinder assembly through the suspension rotating mechanism. After coring is finished, soluble balls are put in, so that the hexagonal differential mechanism is subjected to pressure building reverse lifting to finish core cutting operation; a piston rod of a pneumatic cylinder drives a sliding block valve rod to move to open and close a ball valve, the soluble balls react and dissolve, and multi-point continuous coring operation is completed; and the consistency of the inner cylinder environment and the in-situ environment is recorded, fed back and adjusted through the in-situ fidelity intelligent control assembly.

Description

[0001] 1. Technical field: [0002] The invention relates to the field of oil and natural gas exploration and development tools, in particular to a fidelity continuous coring tool for in-situ monitoring of horizontal wells. [0003] 2. Background technology: [0004] With the depletion of shallow oil and gas resources, the development of my country's oil and gas resources is moving towards deep oil and gas reservoirs. Deep mining will become the normal state in the development of oil and gas resources, and has become an important field for realizing production replacement. Cores are the most authentic basis in the process of oil and gas exploration and development. Drilling and coring technology is the most direct way to obtain cores. During the process of coring and tripping, changes in the occurrence conditions of cores indirectly affect the measurement of oil and gas content, mechanical parameters, and porosity of cores. The accuracy of parameters and other results, and the ...

AI Technical Summary

Problems solved by technology

Most of the current coring tools can only drill single-section cores, and are not suitable for continuous coring of multiple well sections in the same wellbore

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