Safety control system for 30000Psi ultrahigh pressure wellhead

Abstract

The invention discloses a safety control system for a 30000Psi ultrahigh pressure wellhead. The safety control system for the 30000Psi ultrahigh pressure wellhead comprises a high-pressure hydraulic system, an ultrahigh pressure subsurface safety valve hydraulic-control main road and a low pressure control system. The high-pressure hydraulic system comprises a borehole safety valve hydraulic-control main road, and the borehole safety valve hydraulic-control main road comprises a borehole safety main valve branch and a borehole safety trickle valve branch. The low pressure control system comprises a fusible plug control branch, a borehole safety main valve pilot control branch, a borehole safety trickle valve pilot control branch and a subsurface safety valve pilot control branch. The ultrahigh pressure subsurface safety valve hydraulic-control main road increases the pressure to 30000psi to meet opening needs of a subsurface safety valve of a controlled object, and the fusible plug control branch causes shutoff of the subsurface safety valve, a borehole safety main valve and a borehole safety trickle valve through pressure relief. The safety control system for the 30000Psi ultrahigh pressure wellhead solves the problem that an existing conventional wellhead control panel cannot achieve full-electro-hydraulic automatic control when the pressure reaches 30000Psi, and realizes thefull-electro-hydraulic automatic control over the wellhead control panel of an ultrahigh pressure oil and gas well.

Description

technical field [0001] The invention relates to a wellhead safety control system, in particular to a 30000Psi (206MPa) ultra-high pressure wellhead safety control system. Background technique [0002] The wellhead control panel is an important equipment for safe production in the oil field. When there is a fire at the well site or the pressure of the production pipeline is abnormal, the control system can automatically realize the logic program emergency shutdown and remote emergency shutdown. [0003] The maximum output pressure of the conventional wellhead control panel is 15000psi (103MPa). In order to meet the development and production needs of overpressure oil and gas fields, the working pressure of the wellhead control panel is required to reach 30000psi (206MPa). For the wellhead control panel exceeding 15000psi (103MPa), the industry generally uses electric column The combination of the plug pump and the manual pump is used as the hydraulic power source, and the pre...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a 30000Psi (206MPa) ultra-high pressure wellhead safety control system. The problem of electro-hydraulic automatic control has realized the full electro-hydraulic automatic control of the wellhead control panel of ultra-high pressure oil and gas wells

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