Cementing oil and gas wells using converted drilling fluid
This patent describes a method for cementing a wellbore penetrating an earth formation into which a conduit extends. The wellbore having a space occupied by a drilling fluid to be converted to cement for cementing the space to form a seal between spaced apart points in the formation. The method comprising the steps of: providing means for adding cement material and a dispersant to the fluid, circulating the fluid and adding the cement material and the dispersant to a quantity of the fluid in predetermined proportions to form a settable cement composition; circulating the cement composition into the space to fill the space with the cement composition; and recirculating a quantity of the cement composition through the space.
- Assignee:
- Atlantic Richfield Co., Los Angeles, CA
- Patent Number(s):
- US 4883125; A
- Application Number:
- PPN: US 7-131878A
- OSTI ID:
- 7181204
- Resource Relation:
- Patent File Date: 11 Dec 1987
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
CEMENTS
CHEMICAL COMPOSITION
NATURAL GAS WELLS
CEMENTING
OIL WELLS
DRILLING FLUIDS
WASTE PRODUCT UTILIZATION
WELL COMPLETION
BUILDING MATERIALS
FLUIDS
MATERIALS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing