Concentric electric underground measuring and adjusting instrument

Abstract

The invention discloses a concentric electric underground measuring and adjusting instrument and belongs to the field of testing and allocation of oil field separate injection wells. The concentric electric underground measuring and adjusting instrument comprises an upper connector, a flow measurement and control device, an integrated control device, a power transfer mechanism, a positioning anti-rotation device, an electric adjusting device and a sheath. The flow measurement and control device is packaged in the instrument through the upper connector, meanwhile the integrated control device and the power transfer mechanism are sequentially packaged in the sheath from top to bottom, the upper portion of the sheath is connected with the flow measurement and control device, and the lower portion of the sheath is connected with the power transfer mechanism. The lower portion of the power transfer mechanism is connected with the positioning anti-rotation device, and the lower portion of the positioning anti-rotation device is connected with the electric adjusting device. Power supply is achieved through cables, measurement and adjustment instructions, underground flows, pressure and temperature signals are transferred in real time, the instrument is concentrically positioned and in butt joint with a bridge type integrated concentric water distributor, synchronously performs testing and allocation, can finish underground multi-layer flow testing and target flow allocation tasks in one time and effectively improves the testing and allocation success rate and efficiency.

Description

technical field [0001] The invention relates to the field of testing and deployment of layered water injection wells in oil fields, in particular to a concentric electric downhole measuring and adjusting instrument. Background technique [0002] In the development of oil and gas fields, in order to ensure the pressure of the oil and gas fields and to displace the oil, it is necessary to inject water or gas into the formation. Layered water injection is to put a packer in the water injection well to divide the oil layer into several production intervals. Reservoirs with different properties are treated differently. [0003] Water flooding is an important means of oil recovery in the middle and later stages of oilfields. At present, eccentric water distribution string technology is widely used in various oil fields to enhance oil recovery. The existing eccentric water injection method is as follows: firstly, according to the theoretical water allocation and actual water allo...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the difficulties in positioning, docking, and fishing in the layered flow test and allocation of water injection wells in the existing technology, the success rate of measurement and adjustment is low, the workload of flow and pressure tests between layers is large, the allocation efficiency is low, and the allocation is accurate. For the problem of low reliability, the embodimen

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