Adjustable constant-flow multifunctional blanking plug

Abstract

The invention discloses an adjustable constant-flow multifunctional blanking plug and mainly solves a problem that the traditional blanking plug a short constant-flow time. The blanking plug is characterized in that: the lower end of a fishing rod (1) is connected with a driving shaft (7) for rotating in an up and down sliding manner; the lower end of driving shaft (7) is provided with a rotationadjusting nut (3) which is connected with the inside of a main body (2) through threads; the lower end of the rotation adjusting nut (3) is provided with a rotary telescopic rod (9); the upper end ofa plunger (4) is provided with a telescopic rod (10) which is fit and connected with the rotary telescopic rod (9) in an up and down sliding manner; a balance spring (5) is arranged between the rotation adjusting nut (3) and the plunger (4); the main body (2) on the lower end of the plunger (4) is fixed with a limiting pin (6) for limiting; and the diameter of an axial internal hole of the plunger (4) is 11 millimeters. The adjustable constant-flow multifunctional blanking plug has the characteristic of long automatic adjustment and long constant-flow time.

Description

Technical field: [0001] The invention relates to a plug used in an eccentric water distributor in the field of oil recovery, in particular to an adjustable constant-flow multifunctional plug. Background technique: [0002] In the field of oil recovery, in order to enhance the recovery factor, the production degree of the oil layer is improved by layered water injection. Water injection wells generally use eccentric water distributors, and the water injection volume is controlled by the plug of eccentric water distributors. At present, the test and adjustment efficiency of the adjustable faucet plug has been doubled, but due to the short time for deployment and reservoir pressure stabilization, the pass rate of water injection dropped from 95% to 60% one month after the test. However, due to structural reasons, the constant flow plug has problems such as decreased spring force, enlarged nozzle, and jamming, which lead to short constant flow time and short service life, and t...

AI Technical Summary

Problems solved by technology

At present, the test and adjustment efficiency of the adjustable faucet plug has been doubled, but due to the short time for deployment and oil reservoir pressure stabilization, the pass rate of water injection dropped from 95% to 60% one month after the test

However, due to the structure of the constant flow plug, there are problems such as the decrease of the spring elasticity, the increase of the water nozzle, and the jamming, which lead to short constant flow time and short service life, and the success rate of one-time fishing is about 85%, which affects the water injection efficiency.

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