Tubular member interior wiper

Details Tubular member interior wiper Tubular member interior wiper

1979-09-13

1981-09-08

Leppink, James A.

Wells

Brushing, scraping, cutting or punching-type cleaners

166202, E21B 3702

Patent

active

042879485

ABSTRACT:
A wiper for wiping liquids from the interior walls of various tubular members, such as drill pipe, tubing, casing or internal upset pipe is disclosed which is particularly useful in drilling and workover as the tubular members are withdrawn from a well bore.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 for efficient wiping, pressure equalization for equalizing pressures within the wiper with outside pressures encountered within the well bore, made from materials which will not create an explosive condition in use, and ease of manufacture, assembly and disassembly, so that the wiper can be manufactured easily, readily and inexpensively, and repairs and replacement of wear prone parts can be readily and inexpensively made. Other features and advantages are disclosed.

REFERENCES:
patent: 1732277 (1929-10-01), Owens
patent: 2257080 (1941-09-01), Turner
patent: 2460481 (1949-02-01), Abel
patent: 2728398 (1955-12-01), Taylor
patent: 2740480 (1956-04-01), Cox
patent: 4034807 (1977-07-01), Prince et al.

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