Multifunctional combination operation process and device for injection pump unit

Abstract

The invention relates to a multifunctional combination operation process and a device for an injection pump unit. The process comprises the following steps: A, driving a pipe column into a well; B, acidifying, fracturing, testing discharged fluid and cleaning a pipe; and C, carrying out oil extraction or water injection production. The step B comprises the following processes: driving a pipe cleaning column into the well, cleaning the pipe at a seat seal position of a packer, and pulling out the pipe cleaning column; driving a multifunctional combination operation process device for the injection pump unit into the well; feeding prepad fluid or fracturing fluid into the well by an oil pipe, and closing a sleeve valve so that the fluid enters a target layer through a flow passage when the pressure of the oil pipe is more than the pressure of the sleeve; closing the well to react; opening the well, and emptying the discharged fluid from the oil pipe until the pressure at a wellhead is zero and no overflow is generated; pressing by reverse circulation so that the pressure of the sleeve is 15MPa higher than oil pressure, and communicating the empty flow passage of an oil lantern ring; cleaning the well in a reverse circulation mode by clear water; testing the discharged fluid, namely, feeding a fixed valve and a sinking pump into a working cylinder from the wellhead, solving the yield of the discharged fluid and testing the pressure of strata; and stopping pump drainage after the fluid is drained for 30 minutes. The device comprises the working cylinder outside which a sliding sleeve is arranged and inside which the sinking pump and the fixed valve are arranged, and a pressure gauge is arranged in the sinking pump.

Description

1. Technical field

[0001] The invention relates to an oil exploitation downhole operation technology and a downhole pump unit, in particular to a jet pump unit multifunctional combined operation technology and device. 2. Background technology

[0002] At present, the acid fracturing, fluid drainage, and pressure measurement construction techniques and devices used in oil production wells generally adopt a step-by-step method, that is, the acid fracturing string is lowered, and the target layer is acidified or acid fractured; Or after the acid fracturing construction is completed, spray or lower the suction to discharge excess acid liquid or fracturing fluid; pull out the acidizing fracturing string; run into the production injection string for oil production or water injection; carry out corresponding formation pressure , Temperature test. The above-mentioned traditional construction technology and construction facilities have made contributions to oil exploitation, but the...

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