已发表: 11/09/2017
已发表: 11/09/2017
Application
Underbalanced thru-tubing reentry drilling
Geology
Sandstone
Hole size
3 5/8 in
Length drilled
3,990 ft [1,216 m]
Dogleg severity
25°–40°/100 ft
Unconfined compressive strength
35,000 psi [241.3 MPa]
In the sandstone layer of an interbedded formation, an operator encountered wellbore stability and BHA sticking issues when drilling openhole laterals with nitrogen-enriched fluid.