Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
An assembly and methods for constructing a MONOWELL includes 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.
1. A method for drilling a monodiameter borehole, the method comprising:
drilling an initial portion of the borehole with a drilling assembly having a bit and downhole motor;
raising the drilling assembly in the initial borehole portion;
introducing chemical casing into the initial borehole;
allowing the chemical casing to set up and form a chemical casing on the borehole wall;
drilling through the chemical casing in the initial borehole; and
repeating the above steps by drilling additional borehole portions until the borehole is drilled;
installing a string of casing in the borehole; and
a string of casing being installed in the initial borehole portion and a string of expandable casing being installed in each of the additional borehole portions.
2. A method for drilling a monodiameter borehole, the method comprising:
drilling a first portion of the borehole with a drilling assembly having a bit and downhole motor;
raising the drilling assembly in the first borehole portion;
introducing chemical casing into the initial borehole;
allowing the chemical casing to set up and form a chemical casing on the borehole wall;
drilling through the chemical casing in the initial borehole;
installing a casing string in the first borehole;
drilling a second portion of the borehole with a drilling assembly;
raising the drilling assembly in the second borehole portion;
introducing chemical casing into the second borehole;
allowing the chemical casing to set up and form a chemical casing on the borehole wall;
drilling through the chemical casing in the second borehole;
installing an expandable casing string in the second borehole; and
repeating the above steps by drilling additional borehole portions and installing expandable casing until the borehole is drilled.
3. A method for drilling a monodiameter borehole, the method comprising:
drilling one or more portions of a non-producing borehole with a drilling assembly having a bit and downhole motor;
forming a chemical casing on the wall of the non-producing borehole wall; and then
installing one or more strings of expandable casing in the non-producing borehole;
drilling a producing borehole with a drilling assembly; and
installing production tubing in the producing borehole.
4. The methods of claim 3 wherein the borehole portions are drilled using a drilling assembly disposed on the end of a coiled tubing string.
5. The method of claim 4 wherein the coiled tubing string is made of non-metal.
6. The method of claim 4 wherein the borehole portions are cased while drilling.
7. The method of claim 4 wherein a structural casing string may be installed in one borehole portion to form a second barrier.