Bailer for top head drive rotary well drills

Patent · Tue Sep 23 00:00:00 EDT 1980

OSTI ID:6532550

Bartholomew, L

A bailer mounted to the derrick of a top head drive well drilling rig is described. The bailer includes a winch line drum mounted by a bracket to the derrick. A positive displacement hydraulic motor mounts one end of the drum and receives fluid under pressure from the existing hydraulic pressure supply. Valving is provided to allow reverse operation of the motor so equipment can either be raised or lowered relative to the derrick. The hydraulic delivery line to the motor includes a one way restrictor that will allow relatively free passage of fluid to the motor in a driving or lifting mode but will reverse flow of fluid from the motor, thereby affording a braking effect for lowering a load at a selected rate.

• Assignee: IFI; EDB-81-058217
• Patent Number(s): US 4223870
• OSTI ID: 6532550
• Resource Relation: Patent File Date: Filed date 26 Apr 1979
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DRILLING EQUIPMENT
DESIGN
BOREHOLES
DRILLING RIGS
HYDRAULIC EQUIPMENT
ROTARY DRILLS
CAVITIES
DRILLS
EQUIPMENT
420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)