Non-pressure well type underground pipe string equipment

Abstract

Non-pressure well type underground pipe string equipment is characterized by comprising multiple master cylinders, a fixed slip, a fixed slip beam, a travelling slip, a traveling slip beam, a lifting rod, a connecting rod, a universal shaft, a hydraulic hose and a hydraulic cylinder. The master cylinders are fixed under the fixed slip beam side by side, the slip beams include the travelling slip beam and the fixed slip beam, the travelling slip beam is arranged at the top of a hydraulic rod of the master cylinders, slips are composed of the fixed slip and the travelling slip, the fixed slip and the traveling slip are respectively arranged on the fixed slip beam and the travelling slip beam, a hydraulic cylinder of a slip lifting unit is connected with the connecting rod with the rotating portion fixed on the upper portion of a shell and the front end connected with the lifting rod, and the lifting rod is arranged on the lower side of a forked tail on the upper portion of a tooth piece of the slip. The non-pressure well type underground pipe string equipment has the advantages that the well pressure process of the non-pressure well type underground pipe string equipment is omitted, pollution to the oil and gas production layer is reduced, and the oil and gas reservoir is effectively protected.

Description

technical field [0001] The invention relates to a pipe string operation in a downhole with pressure jacking under the condition of no well suppression process, and belongs to the technical field of petroleum drilling and production equipment manufacturing. Background technique [0002] At present, in the drilling operation of the existing technology, because the pressure of the wellbore fluid column is higher than the pressure of the formation, it will cause damage to the production layer, and the material that needs to be mined is often pressed into the formation and cannot be extracted from the ground. The process will also cause material and financial losses. Contents of the invention [0003] The object of the present invention is to provide a snubbing inner pipe string device which utilizes hydraulic pressure to pull out or run in drill strings and oil pipes during drilling and workover operations. [0004] The invention provides a snubbing type downhole pipe string...

AI Technical Summary

Problems solved by technology

[0002] At present, in the drilling operation of the existing technology, because the pressure of the wellbore fluid column is higher than the formation pressure, it will cause damage to the production layer, and the substances that need to be extracted are often It is pressed into the formation and cannot be extracted from the ground, and it will also cause material and financial losses during the well killing operation.

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