Method and apparatus for a monodiameter wellbore, monodiameter casing and monobore

摘要

An assembly and methods are disclosed for constructing a Monowell having a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a monodiameter wellbore includes a bottomhole assembly having a overgauge hole drilling member, a directional steering assembly, a measurement while drilling tool, and a logging while drilling tool; a work string attached to the bottomhole assembly and extending to the surface; drilling fluids flowing through the work string and bottomhole assembly; chemical casing casing the borehole; expandable casing disposed in the wellbore; and a sealing composition disposed between the expandable casing and the wellbore. A method for drilling a monodiameter borehole includes drilling an initial portion of the borehole with a drilling assembly having a bit, downhole motor and reamer; applying a catalyst base material to the borehole wall during drilling; back reaming the borehole as the drilling assembly is raised through the initial borehole portion; applying a set up material to the borehole wall as the borehole is back reamed; forming a chemical casing by reacting the set up material with the catalyst material; repeating the above steps by drilling additional borehole portions until the borehole is drilled; and installing a string of casing in the borehole.