Method of severing a downhole pipe in a well borehole

Details Method of severing a downhole pipe in a well borehole Method of severing a downhole pipe in a well borehole

1997-06-03

1999-07-20

Dang, Hoang C.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 55, 166 63, E21B 2906

Patent

active

059244895

ABSTRACT:
A method of severing a downhole pipe for forming a region in the well borehole devoid of downhole pipe for enhancing the performance of a perforating gun comprising the steps of: severing, at an angle, by a first cutting tool the downhole pipe to form an upper downhole pipe portion and a lower downhole pipe portion to form a sloped cut line; releasing potential energy stored in the upper downhole pipe portion and the lower downhole pipe portion; inserting a plug to seal an up-hole portion of the upper downhole pipe portion; cutting the up-hole portion via a second cutting tool above the plug into an upper piece and a lower piece; and, jettisoning the lower piece downwardly wherein as the lower piece jettisons downwardly the region in the well borehole devoid of downhole pipe is formed. Such method eliminates the need for: removing a well head; a crane or rig for raising a cut up-hole pipe; and, a pump for controlling the pressure of the well.

REFERENCES:
patent: 2436036 (1948-02-01), Defenbaugh
patent: 2918125 (1959-12-01), Sweetman
patent: 3087546 (1963-04-01), Woolley
patent: 3227214 (1966-01-01), Whann
patent: 3318395 (1967-05-01), Messmer
patent: 3461964 (1969-08-01), Venghiattis
patent: 3684008 (1972-08-01), Garrett
patent: 4134453 (1979-01-01), Love et al.
patent: 4352397 (1982-10-01), Christopher
patent: 4703802 (1987-11-01), Bryan et al.
patent: 4799829 (1989-01-01), Kenny
patent: 4819728 (1989-04-01), Lafitte
patent: 5287920 (1994-02-01), Terrell

Affiliated with

Also associated with

Rating

Method of severing a downhole pipe in a well borehole does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of severing a downhole pipe in a well borehole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of severing a downhole pipe in a well borehole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1313861