Hydraulic control of subsea well equipment

Patent · Tue Jun 24 04:00:00 EDT 1986

OSTI ID:5599856

Hurta, G L; Milberger, L J; Williams, A M

A sequence valve employable in a subsea production control system is described which consists of: a) a housing having a bore formed therein; b) input means formed in the housing, the input means being connectible to a supply of fluid for supplying fluid to the housing; c) output means formed in the housing, the output means being operative to provide an output from the sequence valve; d) gate means mounted in the bore for movement in a first direction and in a second direction so as to be selectively positionable in a plurality of positions, the plurality of positions defining different operating modes of the sequence valve; e) constant force biasing means retained in the housing in such a manner as to provide the sequence valve with a small dead band, the constant force biasing means being operative to bias the gate means to one of the plurality of positions; f) pilot pressure input means formed in the housing, the pilot pressure input means being connected to a source of pilot pressure so as to be capable of receiving a plurality of commands therefrom, the plurality of commands being of unique character such that the gate means when occupying the one of the plurality of positions is caused to move to another of the plurality of positions when a particular one of the plurality of commands is transmitted to the pilot pressure input means; and g) quick shift means provided in the housing.

• Assignee: Vetco Offshore, Inc., Ventura, CA
• Patent Number(s): US 4596375
• OSTI ID: 5599856
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
CONTROL
CONTROL EQUIPMENT
DRILLING
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
HYDRAULIC CONTROL DEVICES
NATURAL GAS WELLS
OFFSHORE DRILLING
OIL WELLS
POSITIONING
PRESSURE CONTROL
UNDERWATER OPERATIONS
VALVES
WELLS