ELECTROPOLISHING METHOD FOR OIL FIELD TUBULAR GOODS AND DRILL PIPE

WIPO Patent Application WO2001077491

A3

A method of producing fluids from a wellbore (11) by polishing the inside diameter surface of a downhole tubular (31). The method includes the steps of providing (99) a down-hole tubular (31) having an inside diameter (33) and being made of a carbon steel alloy or high chromium alloy, preparing (101, 103 and 105) an inside diameter surface (33) of the downhole tubular (31), subjecting (107) the inside diameter surface (33) to an electropolishing treatment to produce a smooth surface being slick and essentially non-stick, locating (113) the downhole tubulars (31) within the wellbore (11) adjacent a fluid-producing formation (15), and producing (115) the fluids through the inside diameter (33) of the downhole tubular (31). The electropolishing treatment (107) can also be applied to the inside diameter surface (33) of carbon steel drill pipe (31).

GANDY JOHN B
MAULDIN CHARLIE R
ETHRIDGE ROGER E

PCT/US2001/009984

February 07, 2002

March 29, 2001

Click for automatic bibliography generation  

JOHN GANDY CORP (US)

E21B17/00; E21B37/06; (IPC1-7): E21B17/00; B23H3/00; B23H7/00; C25F3/24

US5942184A	1999-08-24
US4637833A	1987-01-20
US3678567A	1972-07-25
US6242054B1	2001-06-05
US5507923A	1996-04-16
US4483399A	1984-11-20
US3338807A	1967-08-29
US3905885A	1975-09-16
US4670163A	1987-06-02
US4705611A	1987-11-10
US4830827A	1989-05-16
US5820653A	1998-10-13
DE4039479A1	1992-06-17

BOURGOYNE JR. ET AL.: "Applied drilling engineering", SOCIETY OF PETROLEUM ENGINEERS, 1991, pages 19, XP002948424
1997, DOWELL FIELD HANDBOOK, XP002949060

View/Download PDF      PDF Help

Previous Patent: UNDERGROUND MINING SAMPLER

Next Patent: ROCK BOLT AND METHOD OF MANUFACTURE AND INSTALLATION