A pump pressure protection device and method

Abstract

The invention discloses a pumping pressure protection device and a pumping pressure protection method. The method comprises the following steps: S1, setting a pumping pressure limit value and a cylinder sleeve model by an operator, determining a corresponding limit torque value, and determining a theoretical curve; S2, performing limit and self-adaption correction on torque by a PLC (programmable logic controller), and determining a real-time curve; S3, performing a real-time judgment on a value of exhaust pressure, wherein the step S3 comprises failure shutdown substeps: S31, judging whether the pressure value reaches a failure value or not; S32, judging whether the pressure value reaches a shutdown value or not. The technical problem that a mechanical safety value is low in reliability, poor in accuracy, slow in speed, long in recovery time and high in maintenance cost is solved by the pumping pressure protection device and the pumping pressure protection method disclosed by the invention; moreover, the accident rate and damage of high pressure to equipment are greatly reduced through effective pumping pressure protection, the economic cost is greatly reduced, the fracturing efficiency is increased, and the fracturing cycle is shortened; moreover, the demand of an economic high-efficient oil and gas reservoir development can be met.

Description

technical field [0001] The invention relates to a pump pressure protection device and method. Background technique [0002] As an important equipment for oil and gas drilling, the safe operation of pumps has always been highly valued. Excessive pump pressure may bring great harm to personnel safety, high-pressure manifold, pump body, and downhole safety. At the least, it will cause equipment damage, pump stop, increase the cost of oil and gas field development, and at the worst, it will bring personal safety accident or downhole accident. Therefore, pump pressure protection is a very important issue in the production process. [0003] Existing pump pressure protection measures: install a mechanical safety valve in the auxiliary pipeline at the pump outlet, lift up the cutting plate through the small piston, and break the pin to break and vent the pin to achieve the purpose of protection. This protection method has low reliability, poor accuracy, slow speed, long recovery ...

AI Technical Summary

Problems solved by technology

This protection method has low reliability, poor accuracy, slow speed, long recovery time, and high maintenance cost, which brings great changes to protection and maintenance.

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