Method and system for abandoning a borehole
View Patent ↗A method of abandoning a borehole includes, running a tool into the borehole, cutting a casing with a first portion of the tool, reaming the borehole in an area where the casing has been cut with a second portion of the tool, disconnecting a drillstring from the tool, and cementing the borehole through the drillstring.
1. A method of abandoning a borehole, comprising:
running a tool into the borehole;
cutting a casing with a first portion of the tool;
reaming the borehole in an area where the casing has been cut with a second portion of the tool;
disconnecting a drillstring from the tool; and
cementing the borehole through the drillstring all during a single trip within the borehole.
2. The method of abandoning a borehole of claim 1 , further comprising circulating fluid over the first portion during the cutting.
3. The method of abandoning a borehole of claim 1 , further comprising circulating fluid over the second portion during the reaming.
4. The method of abandoning a borehole of claim 1 , further comprising porting circulating fluid through a valve positioned between the first portion and the second portion.
5. The method of abandoning a borehole of claim 1 , further comprising actuating the first portion of the tool hydraulically through a valve.
6. The method of abandoning a borehole of claim 1 , further comprising actuating the second portion of the tool hydraulically through a valve.
7. The method of abandoning a borehole of claim 1 , further comprising directing fluid pressure to one of the first portion and the second portion through a valve based on selected pressures.
8. The method of abandoning a borehole of claim 1 , further comprising cutting or reaming an additional tubular lining the borehole with at least a third portion of the tool.