Process for cleaning an oil field well bore hole using an internal casing wiper

Patent · Tue Aug 05 04:00:00 EDT 1986

OSTI ID:5376844

Krugh, M E

A process is described for removing debris from a cased well bore hole containing a fluid in a substantially static environment comprising the steps of: continuously lowering a tubular tool into the well bore hole during a collection mode to create relative circulation of the fluid through the tubular tool while; scraping the debris from the casing of the well bore hole into the fluid by a scraping means affixed to the lower end of the tubular tool; feeding the debris-containing fluid to the interior of the tubular tool via an opening in the lower end of the tool; filtering the debris-containing fluid upward across a first filtering means cross-sectionally positioned within the tubular tool; collecting the debris filtered from the fluid in a collection means positioned below the first filtering means in the tubular tool; opening a valve, which permits upward flow of filtered fluid through the valve but not reverse downward flow of fluid through the valve and which is positioned cross-sectionally in the tubular tool above the first filterings means and below a port in the upper end of the tool; expelling the filtered fluid from the interior of the tubular tool via the port which provides fluid communication between the interior of the tool and the well bore hole; and thereafter continuously raising the tubular tool in the well bore hole during a retrieval mode while; closing the valve to substantially prevent downward flow of fluid across the filtering means; and removing the debris contained in the collection means of the tubular tool from the well bore hole.

• Assignee: Marathon Oil Co., Findlay, OH
• Patent Number(s): US 4603739
• OSTI ID: 5376844
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CLEANING
CONTROL EQUIPMENT
DESCALING
DRILL PIPES
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FILTERS
FILTRATION
FLOW REGULATORS
FLUIDS
HOISTING
MATERIALS HANDLING
OIL WELLS
PIPES
POSITIONING
SEPARATION PROCESSES
SURFACE FINISHING
VALVES
WELL CASINGS
WELLS