Method and apparatus for balancing pressures in an oil well

Details Method and apparatus for balancing pressures in an oil well Method and apparatus for balancing pressures in an oil well

1978-10-26

1980-03-25

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

166162, 175 71, 175205, E21B 2100, E21B 4100

Patent

active

041945670

ABSTRACT:
The invention relates to the balancing of the pressures in drilled strata, the pressures being lower than that of the liquid columns contained in the entire well.
The hydrostatic level of fluid, e.g. a liquid, in the bottom of the well is selected to obtain the balance and the fluid is caused to flow, to additionally serve as a drilling fluid, by separating the fluid into two columns, communicating at either end, between the tubing of the well and a set of rods therein and within the set of rods, and injecting a fluid of lower density into the upper part of one of the columns.

REFERENCES:
patent: 1867832 (1932-07-01), Hill
patent: 1933595 (1933-11-01), Kapp
patent: 2801079 (1957-07-01), Gress
patent: 2969839 (1961-01-01), Greene
patent: 3534822 (1970-10-01), Campbell et al.
patent: 3566980 (1971-03-01), Scroggins
patent: 4111262 (1978-09-01), Duncan

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