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...

AI Technical Summary

Problems solved by technology

The above-mentioned traditional construction technology and construction facilities have made contributions to oil exploitation, but they also have the following shortcomings or deficiencies: ① Construction is carried out step by step, and the process steps are complicated; ② The construction period is long, and the production time efficiency of oil, water and gas wells is low; ③ The construction cost High, multiple tripping and unloading of the pipe string causes waste of manpower, material resources, and financial resources; ④The labor intensity of the operators is high, and the number of repeated operations is high. One well needs to be operated 2-3 times, and the safety factor is low; ⑤It is easy to cause oil layer or environment Pollution; ⑥ The throttling and sliding sleeve structure of the construction operation device is unreasonable, and has no protective effect on the oil well casing, which is easy to damage the casing and cause construction failure

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