Clutch drive type double-layer adjustable plug

Abstract

The invention discloses a clutch drive type double-layer adjustable plug, and relates to the technical field of water distribution plug structures of eccentric subdivision packing water distributors in the field of separated layer water injection of an oil field water injection well. The clutch drive type double-layer adjustable plug comprises a fishing head, a drive shaft, an upper outer shell, a lower outer shell, a lower connector, an upper screw shaft, an upper nozzle core, an upper nozzle outer sleeve, a lower ratchet, a lower nozzle core, a lower nozzle outer sleeve and the like, wherein the upper screw shaft is connected in the middle of an upper drive sleeve through a driving key. According to the clutch drive type double-layer adjustable plug, flow measurement on two layers can be completed through one-time underground butt joint, and besides, allocation and measurement are carried out according to injection allocation amounts of the two layers; the accuracy rate in flow measurement on each single layer and allocation efficiency in the process of subdivision water injection of a plurality of thin interlayers are improved, and labor intensity is reduced.

Description

technical field [0001] The invention relates to the technical field of a water distribution plug structure of an eccentric subdivision packing water distributor in the layered water injection field of an oilfield water injection well, in particular to a water distribution tool for simultaneous measurement and adjustment of two layers of water. Background technique [0002] Ordinary single-layer plugs of ordinary eccentric water distributors are most commonly used in oilfield layered water injection, but they are not suitable for subdivision of multiple thin interlayers, and the distance between water distributors must be greater than 8 meters. Although the newly developed eccentric subdivision water injection technology in various oil fields solves the problem of small card distance, the plug in the eccentric seal water distributor has two built-in water nozzles, and the size of the water nozzles is fixed. Similarly, it needs to be fished out from the well and put in again, ...

AI Technical Summary

Problems solved by technology

[0002] Common single-layer plugs of common eccentric water distributors are most commonly used in oilfield layered water injection, but they are not suitable for subdivision of multiple thin interlayers, and the distance between water distributors must be greater than 8 meters.

Although the newly developed eccentric subdivision water injection technology in various oil fields solves the problem of small card distance, the plug in the eccentric isolation water distributor has two built-in water nozzles, and the size of the water nozzles is fixed. Similarly, it needs to be fished out from the well and put in again, which requires a lot of work; when testing and deploying, a storage flowmeter is used, and the data needs to be played back on the ground. increase, prolonging the measurement and adjustment cycle, increasing production costs and labor intensity

[0003] At present, the adjustable flow plug used in the downhole will gradually replace the single-layer common plug, which solves the problems of low test accuracy rate of multi-single layer, difficulty in water injection deployment, low fishing efficiency, and low testing efficiency; Adjustable nozzles for small water injection wells in oil fields (Patent No. 200920245845.1); ②Flow adjustable plug (Patent No. 201120354427.3); ③Constant flow and adjustable dual-function plug (Patent No. 201120065811.1); realized single-layer flow Measurement and adjustment, none of which involve two-layer flow measurement and adjustment

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