High-pressure water injection well head pressure gauge connector and matched wrench thereof

Abstract

The invention provides a high-pressure water injection well head pressure gauge connector and a matched wrench thereof. The high-pressure water injection well head pressure gauge connector comprises a pressure gauge, a pressure gauge connector sensing assembly, a connecting neck, an emptying assembly and a ball valve assembly; the sensing assembly comprises a pressure gauge sensor, a pressure sensor, a first pressure sensing diaphragm, an anti-freezing oil adding opening, a second pressure sensing diaphragm, a leakproof partition plate, an anti-freezing oil storage space and an anti-freezing oil storage space outer wall; the emptying assembly comprises a double-headed bolt, an emptying opening, an emptying clearance, a bolt middle section, a double-headed thread, a double-headed thread rotating pointer disc and a hexagonal big-head nut; the ball valve assembly comprises a ball valve, a ball valve upper tube, a ball valve lower tube, a ball valve connecting rod, a ball valve rotating dial, a hexagonal big-head nut and a water injection well head connecting thread; the connecting neck, the emptying assembly and a hollow part of the ball valve form a liquid flowing channel. The high-pressure water injection well mouth pressure gauge connector and the matched wrench thereof have the advantages of being simple in structure, convenient to disassemble and assemble, capable of saving the anti-freezing liquid cost and easily regulating emptying and pressure relieving, stable in operation and accurate in measurement.

Description

technical field [0001] The invention belongs to the technical field of oil production, and in particular relates to a wellhead pressure gauge connector for abnormally high-pressure and high-pressure water injection wells in permeable tight oil fields. Background technique [0002] Among the proven reserves of onshore crude oil in my country, there are abundant low-permeability tight sandstone reservoirs, which are characterized by low porosity, low permeability, strong heterogeneity, and low single-well productivity. For such reservoirs, water injection development is often required. In the field water injection operation, the water injection pressure varies from 15MPa to 25MPa, and the pressure is relatively high, which requires high pressure resistance of the on-site water injection process equipment. [0003] The high-pressure water injection pressure gauge is a commonly used instrument installed in the process equipment such as the wellhead of the water injection well an...

AI Technical Summary

Problems solved by technology

However, the high-pressure water injection pressure gauge and the needle valve have the following problems: 1. The ability to withstand the cold weather in winter is low, and freezing blockage occurs. The use of felt and other heat preservation is ineffective, resulting in the failure of normal recording of the pressure gauge data; 2. The needle valve due to water injection pressure High, unable to open normally, unable to release pressure normally; 3. There is no special tool for the needle valve, the rotating end of the needle valve is a short square column and a knob screw, conventional wrench, etc. lead to slippage; 4. The water injection pressure is high, The connection between the needle valve and the water injection wellhead and the pressure gauge is not tightly sealed, and there are leaks and "icebergs"; 5. The threaded connection of the high-pressure water injection pressure gauge needs to be added with raw tape, so that the pressure gauge cannot rotate horizontally and vertically; 6. There is a safety risk, the design of the vent is horizontal, and there is a hidden danger of injury

At present, there is no connector for the pressure gauge of the wellhead of the high-pressure water injection well on the market. Most of the inventions are mainly focused on the connection of the oil production pressure gauge under normal pressure, and they are all made according to a single problem in the oil field. Solution, so for high pressure water injection pressure gauge, there needs to be a special device and tool to ensure the normal operation of high pressure water injection pressure gauge

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