Mud saver valve

Patent · Tue Feb 13 00:00:00 EST 1990

OSTI ID:6998176

Baugh, B F

This patent describes a mud saver valve for retaining drilling fluid in the kelly of a rotary drilling rig. It comprises: a kelly sub defining an open-ended elongated body having threaded ends for forming a connection between the kelly and a drill pipe string; an enlarged bore formed in said elongated body; a tubular body received within said enlarged bore of said elongated body, said tubular body including an enlarged portion defining a shoulder for engagement with a shoulder formed in said elongated body; hollow piston means axially disposed within said tubular body. The piston means being axially movable relative to said tubular body and defining a fluid passage therethrough; valve means removably mounted within said tubular body. The valve means cooperating with said piston means to normally close the fluid passage through said piston means, wherein said valve means is movable between a first and second position; a stop member removably connected to said tubular body. The stop member including a first internal circumferential tapered shoulder for limiting downward movement of said valve means; and means for urging said piston means into engagement with said valve means.

• Assignee: Citizens Bank, Corpus Christi, TX
• Patent Number(s): US 4899837; A
• Application Number: PPN: US 7-128681A
• OSTI ID: 6998176
• Resource Relation: Patent File Date: 4 Dec 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
ROTARY DRILLS
VALVES
DESIGN
DRILLING FLUIDS
NATURAL GAS WELLS
ROTARY DRILLING
CONTROL EQUIPMENT
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
FLOW REGULATORS
FLUIDS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing