Isolation type high-pressure-resistance underground pipe column and production method thereof

Abstract

The invention discloses an isolation type high-pressure-resistance underground pipe column and a production method thereof, and belongs to the technical field of oil and gas drilling. According to theisolation type high-pressure-resistance underground pipe column and the production method thereof, an underground pipe column outer pipe is provided; an underground pipe column inner pipe is arrangedin the underground pipe column outer pipe; the underground pipe column inner pipe is positioned in the underground pipe column outer pipe and is arranged vertically; an upper-layer eccentric bottom-hole regulator is arranged on the underground pipe column inner pipe; the upper-layer eccentric bottom-hole regulator in sleeving connection with the upper end of the underground pipe column inner pipe; and the internal structure of the underground pipe column can be improved, the compressive strength on a side wall stress by the improved underground pipe column is improved, the side wall pressureis segmented and isolated by a layered structure, the side wall pressure is distributed in the outer structure conveniently, and occurrence of an underground pipe column stress concentration area is reduces, so that local accumulated damage generated by the internal part of the underground pipe column is reduced, cracking and breaking conditions of the internal part of the underground pipe columnare reduced and the safety of the oil and gas exploitation process is improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, and more specifically relates to an isolated high-pressure-resistant downhole pipe string and a production method thereof. Background technique [0002] For special equipment for oil and gas drilling and production, among the failures of mining equipment, there are mainly four types of failures: damage, aging and looseness, imbalance, and performance failure caused by blockage and leakage, which are manifested as cracking and corrosion of parts. Problems and problems such as strain deformation, cracking and indentation, while aging problems are mainly reflected in the deterioration and aging of materials, wear and peeling, etc., followed by loose faults, which are mainly reflected in the falling and loosening of parts Wait. [0003] In the drilling process before oil and gas drilling, directional drilling technology is generally used to realize "one base with multiple holes, one hol...

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Problems solved by technology

[0005] The above technical solution can monitor the corrosion of the downhole pipe string online. By loading sine wave signals of different frequency points on the working electrode and synchronously collecting the polarization current of the auxiliary electrode and the polarization potential of the reference electrode, it can be measured Corrosion rate of the downhole string, but the impact on the normal operation of the downhole string is not only the corrosion caused by the internal monitoring tubing and the annular space of the oil casing, but also the inward pressure of the casing side wall on the downhole string during the drilling process. It is easy to cause damage to the downhole pipe string. Some downhole pipe strings bear relatively large inward pressure at deep underground locations. With the increase of service time, the downhole pipe string is subject to internal stress and strain, and local permanent accumulation is easily generated inside Damage, cracks will occur after a certain number of cycles, and even a sudden complete fracture will bring certain hidden dangers to the safe production of oil and gas mining

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