Method for improving the integrity of coupling sections in high

Details Method for improving the integrity of coupling sections in high Method for improving the integrity of coupling sections in high

1989-02-03

1989-11-28

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Shaping by direct application of fluent pressure

29507, 29523, 295271, 29530, 166187, 166287, 166380, 166387, 264 36, 264263, 285 18, 2853824, B21D 3900

Patent

active

048828300

ABSTRACT:
A system and method for improving the seal integrity and useful life of tubing and casing strings fills the volume between the nose ends of facing tubing sections and the collar to which they are mutually joined with a temperature and corrosion resistant element having a smooth interior surface substantially flush with the inner diameter of the tubing or casing. During makeup of each successive section of the drill string, a center fill tool including an expansible tubular element is seated below the coupling area to be self-retained, by the use of pressure expansion of a cylindrical surface. A precise amount of a curable material is inserted into the volume bounded by the nose ends and the collars (the so-called "J area") and while the material is still flowable the coupling is made up by threading in of the next tubular element. When sufficient setting has taken place, which occurs quickly, a retrieving tool is lowered to grip the upper end of the insert which is configured internally to vent the pressurizing gas as upward force is exerted. Thus the center fill tool can be moved out of position and the string lowered into the well bore, the tool then being ready for makeup of the next succeeding coupling.

REFERENCES:
patent: 3355226 (1967-11-01), Portz
patent: 4120083 (1978-10-01), Echols
patent: 4132437 (1979-02-01), Green
patent: 4153656 (1979-05-01), Bunyan
patent: 4368571 (1983-01-01), Cooper, Jr.
patent: 4398754 (1983-08-01), Caroleo et al.
patent: 4507842 (1985-04-01), Werner
patent: 4714377 (1987-12-01), Sandt et al.

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