Method for casing a hole drilled in a formation
OwnerHans P. Hopperinventor
Life of this patent
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Abstract
Method for casing a hole drilled in a formation having an enlarged section located below a previously cased section. The method includes running casing into the enlarged section wherein the casing is of slightly smaller diameter than that present in the previously cased section, pumping cement into the annulus formed between the outer surface of the casing and the enlarged section of the formation, providing a valve arrangement in the casing to permit circulation of the cement between the annulus and an inner portion of the casing, securing the casing in position within the hole and hanging and packing off in the last casing string. Finally, the previously cased string is latched and sealed to the last casing string.
Claims9
A method for casing a hole drilled in a formation, said hole having an enlarged section located below a previously cased section, said method comprising the steps of:
- running new casing into said enlarged section, wherein said new casing is of slightly smaller diameter than casing present in the previously cased section;
- pumping cement into an annulus formed between an outer surface of said new casing and said enlarged section of said formation;
- providing means in said new casing to permit a circulation path for said cement between said annulus and an inner portion of said new casing;
- securing said new casing in position within said hole;
- hanging and packing off in the last casing string;
- and
- latching and sealing the previously cased section to said last casing string.
Dependencies are inferred from the claim text.