Installing reservoir taps

Patent · Tue Oct 25 04:00:00 EDT 1988

OSTI ID:6521117

Crowe, J W

This patent describes a method of installing a tap in a liquid storage tank containing liquid such as water and having a wall, a top and a bottom and a manhole cover in the wall, a method which comprises: placing a dry pot having an open end with a flange and gasket means thereon against the inside of the manhole cover by manipulating the dry pot from within the tank while the tank contains liquid; drilling a pilot hole at about the center of the manhole from the outside while the dry pot is held against the cover; removing the water in the dry pot from the outside thus permitting the hydrostatic pressure within the tank to hold the dry pot in place when the hydrostatic pressure within the dry pot is reduced by removing the water therein; placing a threaded pipe nipple within flange into the hole in the cover; securing the flange of the pipe nipple to the manhole to prevent leakage between the flange and the hole; screwing a threaded tap valve onto the threaded pipe nipple on the outside of the tank and removing the dry pot.

• Assignee: NOV; EDB-89-026972; NOV-89-034404
• Patent Number(s): US 4779636
• OSTI ID: 6521117
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420205* -- Engineering-- Transport & Storage Facilities-- (1980-)
CLOSURES
CONTAINERS
CONTROL EQUIPMENT
EQUIPMENT
FLANGES
FLOW REGULATORS
FUELS
HYDROGEN COMPOUNDS
HYDROSTATICS
INSTALLATION
JOINTS
LIQUID FUELS
OXYGEN COMPOUNDS
PIPE JOINTS
PRESSURE EFFECTS
REMOVAL
STORAGE
SURFACE WATERS
TANKS
THREADED JOINTS
VALVES
WATER
WATER REMOVAL
WATER RESERVOIRS