Intelligent constant flow water injection wellhead

Abstract

The invention discloses an intelligent constant flow water injection wellhead, which comprises an inlet-end valve body, a constant flow valve body and an outlet-end valve body, wherein the inlet-end valve body, the constant flow valve body and the outlet-end valve body are provided with flow passing holes, and are communicated with one another; a constant flow valve seat is arranged on the constant flow valve body; the lower end of a differential pressure floating stable-flow valve core is inserted into the flow passing hole of the constant flow valve seat; a balancing spring is arranged at the upper end of the differential pressure floating stable-flow valve core in a sleeving way; an adjusting screw is arranged at the upper end of the balancing spring; a gland is arranged on the adjusting screw; an intelligent control box is also arranged on the lateral surface of the constant flow valve body; a flow meter and an inlet pressure transmitter are arranged on the inlet-end valve body; an outlet pressure transmitter and a pressure relief needle valve are arranged on the outlet-end valve body; the inlet pressure transmitter, the flow meter and the outlet pressure transmitter are all connected with the intelligent control box. According to the intelligent constant flow water injection wellhead, real water injection data are acquired, stored and remotely transmitted in real time, the most authentic basis is provided for the formulation of a reasonable water injection process, and the condition of false data and real analysis is avoided; the intelligent constant flow water injection wellhead is easy to machine, is less in investment and is unattended, a water injection pipeline flow is simplified, and contributions to the consumption reduction and the effect improvement of an oilfield are made.

Description

technical field [0001] The invention relates to an intelligent fluid valve, in particular to an intelligent constant-flow water injection wellhead. Background technique [0002] Oilfield water injection system is one of the most important work in crude oil extraction. Especially for ultra-low permeability oilfields, injecting water into the reservoir, supplementing formation energy, and flooding oil with water are important means to increase oil recovery rate and crude oil recovery rate, and reduce crude oil decline rate. If the water injection is unstable, it will lead to problems such as violent water flooding, unbalanced water flooding of the reservoir, and low degree of water driving. Therefore, at present, water injection stations are commonly used in oil fields, and then connected to several water distribution rooms through radial pipelines. In the water distribution rooms, proportionally adjusted water injection valves are used to transport quantitative water to wate...

AI Technical Summary

Problems solved by technology

In this way, there are four important problems in oilfield water injection: 1. The amount of pipeline laying is large, and reciprocating and repeated piping will inevitably occur, and the construction investment of the water distribution room will increase.

2. It cannot truly reflect the actual state of water injection pressure and flow, such as faulty leakage of long-distance pipelines, pressure loss along the way, etc.

3 The problem of intelligent real-time data monitoring at the water injection wellhead

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