An Adaptive Casing Centralizer Used in Oilfield Development

Abstract

The invention belongs to the field of petroleum exploitation, and specifically discloses a casing centralizer for self-adaptive oil field exploitation, which includes a locking and limiting unit, a shaping and limiting unit, and two end fixing units. A centering mechanism is provided between one side and the locking and limiting unit, and the end fixing unit includes two half-ring mechanisms that are slidably connected to each other. The half-ring mechanisms include an end plate, and one end of the end plate is fixedly connected. There is an adjustment plate, the inner wall of the end plate is provided with a cavity, and the bottom of the inner wall of the cavity is provided with a locking groove; the invention provides an adaptive casing centralizer for oil field development, which can realize the control of various The righting operation of the diameter casing improves the flexibility of the use of the device; by setting two end fixing units, a locking limit unit and a shaping limit unit, the casing can be righted at multiple positions, with strong support. The righting effect is good.

Description

technical field [0001] The invention relates to the field of oil exploitation, in particular to an adaptive casing centralizer for oilfield development. Background technique [0002] With the rapid development of my country's economy, the demand for oil and gas has grown rapidly. Oil and gas wells are holes drilled in the formation according to a certain well layout system specially for the extraction of underground oil or natural gas; or wells converted from other wells for oil and gas production. Casing is generally run in the well, and cement is injected between the outer wall of the casing and the well wall to maintain the well wall and seal the aquifer, and isolate different oil layers; oil and gas pipes are also run in the casing. [0003] Oil and gas well engineering is a capital and technology-intensive project implemented around the construction, measurement and protection of oil and gas wells, mainly including oil and gas exploration and development drilling and c...

AI Technical Summary

Problems solved by technology

Existing centralizers have large outer diameters and relatively fixed inner diameters, making it difficult to centralize casings with different diameters, and have poor flexibility in use; Insufficient supporting force, poor centralization effect, and due to a certain degree of borehole diameter expansion, the existing centralizer cannot be adjusted for deformation, and the connection with the well wall is poor, so it is difficult to ensure that the casing is centered

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