Method for improving cuttings transport during the rotary drilling of a wellbore

Patent · Tue Jul 05 04:00:00 EDT 1988

OSTI ID:6818549

Dellinger, T B

A method is described for increasing the cuttings transport efficiency during the rotary drilling of a wellbore with a drill string formed of a plurality of sections of drill pipe interconnected at tool joints and having a drill bit at the lower end thereof, comprising: (a) circulating a drilling fluid down the drill string and returning the fluid from the wellbore up the annulus formed between the drill string and the wellbore wall, (b) flowing the drilling fluid through a plurality of annulus reducers successively varying in diameter and located at spaced apart positions along the drill string and (c) axially reciprocating the drill string a distance at least equal to the axial spacing of the variable diameter annulus reducers along the drill string during drilling while continuously maintaining drilling bit weight so as to provide a cyclical pumping action to the flow of drilling fluids in the axial direction of the wellbore which enhances the transport of drill cuttings up the annulus of the wellbore.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4754819
• OSTI ID: 6818549
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CUTTINGS REMOVAL
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
DRILLS
EFFICIENCY
EQUIPMENT
FLUID MECHANICS
FLUIDS
HYDRAULICS
MECHANICS
NATURAL GAS WELLS
OIL WELLS
PIPES
REMOVAL
ROCK DRILLING
ROTARY DRILLING
ROTARY DRILLS
WELLS