Wells – Processes – Cementing – plugging or consolidating
Patent
1987-06-22
1988-11-29
Dang, Hoang C.
Wells
Processes
Cementing, plugging or consolidating
166 50, 1661177, 166173, 166177, 166312, E21B 3314
Patent
active
047874570
ABSTRACT:
A method and apparatus for rotating a portion or segment of a casing string in a relatively highly deflected well bore. A straight well bore portion is provided adjacent the completion interval, beyond the deflected portion. A casing string is made up with a segment connected by a swivel to the remainder of the string. This segment is located in the straight portion of the bore. A drill string is lowered into the casing into engagment with a rotatable swivel portion fixed to the casing segment. The drill string is rotated to rotate the casing segment independently of the remainder of the casing string. This facilitates removal of excess mud cake from the annulus adjacent the casing segment, and also placement of cement in the annulus.
REFERENCES:
patent: 2675082 (1954-04-01), Hall
patent: 2719024 (1955-09-01), Prescott et al.
patent: 2876844 (1959-03-01), Warner
patent: 3205945 (1965-09-01), Holt
patent: 3828852 (1974-08-01), Delano
patent: 4010804 (1977-03-01), Garcia
patent: 4239083 (1980-12-01), Silberman et al.
Lindsey, Jr., "Rotate Liners for a Successful Cement Job", World Oil, Oct. 1986.
Bateman Tom D.
Bateman Trent A.
Webster Mark B.
Bateman Tom D.
Bateman Trent A.
Dang Hoang C.
Webster Mark B.
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