Tubular interior wiper
A wiper for wiping liquids from the interior walls of various tubulars, such as drill pipe, tubing, casing or internal upset pipe is described. It is particularly useful in drilling and workover as the tubular member is withdrawn from a well bore. Features of the wiper include the ability to readily and easily pass through and wipe liquids from restricted passages or bores such as internal upset pipe. Means for centralizing the wiper in the passages or bore are provided for efficient wiping. Pressure is equalized within the wiper with outside pressures encountered within the well bore. The ease of manufacture, assembly and disassembly of the wiper make it inexpensive, and the repairs and replacement of wear prone parts can be readily and inexpensively made. 9 claims.
- Assignee:
- EDB-84-110312
- Patent Number(s):
- US 4221264
- OSTI ID:
- 7060786
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CLEANING
CONTROL
DESIGN
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
INSTALLATION
MAINTENANCE FACILITIES
MATERIALS HANDLING EQUIPMENT
PIPES
POSITIONING
PRESSURE CONTROL
REPAIR
WELL CASINGS
WELL COMPLETION
WELL DRILLING