Safety valve for an oil well

• Main Author: JEAN-LUC JACOB ET ERIC COUSTE
• Format: Patent
• Language: English; French
• Published: 19.02.1988
• Edition: 4
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention relates to a safety valve for an oil well, comprising, in conventional fashion, a movable stopper member, an internal tubular slide 9, a slide return spring 10, hydraulic means for displacing the slide downwards by pressurising a control fluid, a system for anchoring the valve into a r...