Injection system used gravity to realize automatic adjustment of oil field injection well and using method

Abstract

The invention discloses an injection system used gravity to realize automatic adjustment of an oil field injection well and using method, and relates to the technical field of oil field equipment. Theinjection system used the gravity to realize automatic adjustment of the oil field injection well includes a flow duct, a valve port is arranged at the water inlet end of the flow duct, a first hydraulic cylinder and a second hydraulic cylinder are sequentially arranged on the flow duct according to the water flow direction, a first piston and a second piston are respectively mounted in the firsthydraulic cylinder and the second hydraulic cylinder, a first pressure guiding opening is formed between the first piston and the flow duct, a second pressure guiding opening is formed between the second piston and the flow duct, the first piston and the second piston are connected through a rigid connection object, the rigid connection object is provided with a gravity loading piece, the first piston is connected with an oil pressure valve through the control part of the oil pressure valve, and the oil pressure valve is matched with the valve port. According to the injection system used thegravity to realize automatic adjustment of the oil field injection well, injection pressure adjustment and injection volume control are automatically conducted, automatic control avoids artificial subjective factors affecting the injection effect, and the injection data are precise in time and exquisite in effect.

Description

Technical field: [0001] The invention relates to the technical field of oilfield equipment, in particular to an injection system and a use method for realizing automatic adjustment of oilfield injection wells by using gravity. Background technique: [0002] In the daily control and management of injection wells in oilfields, oil production engineers patrol the wells every day to control injection pressure (ie oil pressure) and injection volume according to the geological plan requirements, to ensure that the injection pressure (ie oil pressure) and injection volume are within the required range, control The equipment is an ordinary valve, most of which is a gate valve; the control method is: inspect the wellhead from the well, record the injection pressure (oil pressure) on site, if there is a deviation between the pressure value and the pressure value required by the plan, change the injection volume by switching the valve size To make the injection pressure (oil pressure) ...

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Problems solved by technology

[0002] In the daily control and management of injection wells in oilfields, oil production engineers patrol the wells every day to control injection pressure (ie oil pressure) and injection volume according to the geological plan requirements, to ensure that the injection pressure (ie oil pressure) and injection volume are within the required range, control The equipment is an ordinary valve, most of which is a gate valve; the control method is: inspect the wellhead from the well, record the injection pressure (oil pressure) on site, if there is a deviation between the pressure value and the pressure value required by the plan, change the injection volume by switching the valve size To make the injection pressure (oil pressure) change to meet the required injection pressure (oil pressure), and the adjusted injection volume value should be within the fluctuation range of the injection volume required by the plan, otherwise it will be regarded as an abnormal well and reported for a period of time; because On-site well distance of 100 meters, poor terrain and road conditions, rainy, snowy and windy weather, unstable and fluctuating incoming water pressure (ie, pump pressure), changes in underground conditions increase the frequency of adjustment and control, and other objective factors, which require a lot of labor and labor. Due to subjective factors such as labor intensity, labor conditions and workers' level, the control effect is often not good, the data is not accurate enough, and the effect cannot meet expectations, so that the cumulative pump output of the joint station flowmeter and the unit area under its jurisdiction The sum of the cumulative injection volume of the well (theoretically equal) is very different

[0003] However, the existing unmanned control injection technology requires electricity, laying cables, building and distributing water, investing a large amount of electronic and electrical equipment, actuator programming, computer execution, etc., the initial investment and later maintenance costs are extremely high, and the method requires building and distributing water. It is difficult to be compatible with the current situation that the wellhead control part is distributed next to each single well Christmas tree whose position is determined according to the geological plan.

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