Use of marker fluid in cementing offshore wells

Patent · Tue Jul 05 00:00:00 EDT 1983

OSTI ID:5481463

Gallus, J P

Cementing casing in an offshore well is disclosed by displacing a drilling fluid with a settable cement slurry wherein there is injected into the annulus between the sidewall of the well and the casing ahead of the cement slurry a slug of a visually identifiable marker fluid containing cement, water, particulate carbon black, coal dust, and a surface active agent; visually observing when the fluid being displaced from the annulus changes from drilling fluid to marker fluid, and shutting in the well to allow the cement slurry to set.

• Assignee: Union Oil Company of California
• Patent Number(s): US 4391329
• OSTI ID: 5481463
• Resource Relation: Patent File Date: Filed date 14 May 1981; Other Information: PAT-APPL-263510
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DRILLING FLUIDS
COLOR
OFFSHORE OPERATIONS
WELL CASINGS
WELL COMPLETION
CEMENTING
CARBON BLACK
CHEMICAL COMPOSITION
SLURRIES
CARBON
DISPERSIONS
ELEMENTS
FLUIDS
MIXTURES
NONMETALS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
SUSPENSIONS
423000* - Engineering- Marine Engineering- (1980-)
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)