Method and apparatus for cementing a production conduit within an underground arcuate bore

Patent · Tue Nov 22 04:00:00 EST 1988

OSTI ID:6332486

Cherrington, M D; Cherrington, W D

This patient describes a method of boring an arcuate underground pilot bore hole along a predetermined path between two spaced surface locations in a single boring operating of a single constant diameter utilizing a drill bit on a leading drill pipe section of a drill string the method comprising the steps of: advancing the drill string having the drill bit thereon from a surface entrance location to a surface exit location; discharging drilling fluid from the leading drill pipe section during the boring operation; removing the drill bit from the drill string at the surface exit location; attaching a reamer to the drill string at the exit location; pulling the drill string and reamer back through the pilot bore hole from the exit opening to the entrance opening in an opposite direction of travel while rotating the reamer with the reamer forming an enlarged opening; pushing the reamer back through the reamed hole from the entrance opening to the exit opening; connecting the production conduit to the reamer at the exit opening; then pulling the reamer and production conduit back through the reamed opening from the exit opening to the entrance opening for installing the production conduit within the enlarged reamed hole; and discharging cement from reamer into the annulus between the production pipe and the adjacent surface of the enlarged reamed hole simultaneously with the pulling of the production conduit within the reamed opening.

• Assignee: NOV; NOV-89-048214; EDB-89-052687
• Patent Number(s): US 4785885
• OSTI ID: 6332486
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BOREHOLES
BUILDING MATERIALS
CAVITIES
CEMENTING
CEMENTS
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUIDS
INSTALLATION
MATERIALS
NATURAL GAS WELLS
OIL WELLS
PIPES
ROCK DRILLING
WELL COMPLETION
WELLS