Well bore tools

Patent · Tue Aug 28 00:00:00 EDT 1984

OSTI ID:6162658

Burge, E V

Well bore tools configured as centralizers/stabilizers, well bore reamers, and keyseat wipers each of which includes an elongate tubular body having a generally cylindrical outer surface and a diameter approximately equal to the diameter of the borehole being drilled are disclosed. Each tool affords an improved mode of drilling a borehole by increasing downhole directional control and stability, increasing tool wear reliability, and reducing return mud flow resistance. The outer surface of each tool has a plurality of longitudinal passages formed in pairs of upright intersecting right and left hand helicies or spirals about the exterior of said tool and extending from one end to the other end thereof. The intersecting right and left hand helical or spiral channels form raised pad areas therebetween to provide 360/sup 0/ contiguous well bore contact by each tool for enhanced stability and efficiency. In addition, the intersecting right and left hand helical channels afford greater surficial engagement area while providing unobstructed return mud flow paths between each tool and the wall of the borehole. The raised pad areas may have wear resistant surfaces which are arranged in a configuration for affording constant 360/sup 0/ contiguous contact with the wall of the borehole. Preferably, the wear resistance surfaces are provided by replaceable inserts mounted in recesses in the pad areas.

• Assignee: Hawn Jr., R.D.
• Patent Number(s): US 4467879
• OSTI ID: 6162658
• Resource Relation: Patent File Date: Filed date 29 Mar 1982; Other Information: PAT-APPL-362741
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DRILLING EQUIPMENT
PERFORMANCE
RELIABILITY
NATURAL GAS WELLS
WELL DRILLING
OIL WELLS
DIRECTIONAL DRILLING
EFFICIENCY
PROCESS CONTROL
STABILITY
WEAR RESISTANCE
CONTROL
DRILLING
EQUIPMENT
MECHANICAL PROPERTIES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing