Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Patent
1990-03-15
1992-02-18
Dang, Hoang C.
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
166 551, 175 454, E21B 43117
Patent
active
050885570
ABSTRACT:
A downhole pressure attenuation apparatus is provided by which the explosive and hydraulic peak pressure and quasi-static pressure pulses generated by perforating gun detonation are attenuated by one or more fluid-free chambers having initially closed vent ports which are opened substantially contemporaneous with gun detonation so as to provide one or more free volume, pressure absorbing cavities. The pressure attenuation apparatus is made up of at least one fluid-free chamber and one or more pressure relief vents. Each pressure relief vent includes at least one charge port assembly having a prestressed port and an explosive filled shaped charge. The number of charge port assemblies used in each vent is determined by the surface area to be opened and the size of the vent chamber. Each of the charge port assemblies of the relief vent is operatively connected to a common explosive filled, detonating cord which forms part of the perforating gun detonating cord, or an extension thereof depending on the location of the pressure attenuating apparatus with respect to the perforating gun or guns. As the detonating cord fires, it causes each of the charge ports to sequentially fire and blow out the prestressed area of each port so as to open one or more vent holes leading to the vent chamber. The amount of explosive in each of the shaped charges of the charge ports is limited so that the detonation of the charge ports in the relief vent does not damage surrounding tubular bodies in the well.
REFERENCES:
patent: 2120615 (1938-06-01), King
patent: 2155322 (1939-04-01), McCullough
patent: 2419371 (1947-04-01), Schlumberger
patent: 2873675 (1959-02-01), Lebourg
patent: 3001584 (1961-09-01), Scott
patent: 3163112 (1964-12-01), Rhea
patent: 3311178 (1967-03-01), McElheny
patent: 3422760 (1969-01-01), Mohaupt
patent: 3528511 (1970-09-01), Boop et al.
patent: 3710717 (1973-01-01), Tamplen
patent: 3871448 (1975-03-01), Vann et al.
patent: 3931855 (1976-01-01), Vann et al.
patent: 3978921 (1976-09-01), Ross
patent: 4040482 (1977-08-01), Vann
patent: 4151880 (1979-05-01), Vann
patent: 4299287 (1981-11-01), Vann et al.
patent: 4330039 (1982-05-01), Vann et al.
patent: 4491185 (1985-01-01), McClure
patent: 4512406 (1985-04-01), Vann et al.
patent: 4515217 (1985-05-01), Stout
patent: 4529038 (1985-07-01), Brieger
patent: 4576233 (1986-03-01), George
patent: 4616701 (1986-10-01), Stout et al.
patent: 4657089 (1987-04-01), Stout
patent: 4664184 (1987-05-01), Grigar
patent: 4693314 (1987-09-01), Wesson et al.
patent: 4693317 (1987-09-01), Edwards et al.
patent: 4732211 (1988-03-01), Haugen et al.
patent: 4790385 (1988-12-01), McClure et al.
patent: 4800958 (1989-01-01), Haugen et al.
Barton John A.
Ricles Thomas D.
Dang Hoang C.
Dresser Industries Inc.
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