Perforation gun string energy propagation management with tuned mass damper
First Claim
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1. A perforation tool assembly, comprisinga perforation gun;
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a tool body, wherein the tool body is coupled to the perforation gun, wherein the tool body comprises a first end and a second end, and wherein a distance between the first end and the second end is fixed;
a mass suspended within the tool body, wherein the mass is moveably suspended within the tool body; and
at least one absorber, wherein the at least one absorber comprises a first absorber disposed between a first end of the mass and the first end of the tool body and a second absorber disposed between a second end of the mass and the second end of the tool body, wherein the mass is supported within the tool body by the first absorber and the second absorber, wherein the at least one absorber is disposed between the mass and the perforating gun, and wherein the first absorber has a different compliance than the second absorber.
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Abstract
A perforation tool assembly comprises a perforation gun, and a mass energy absorber coupled to the perforation gun. The mass energy absorber is configured to alter the propagation of mechanical energy released by firing one or more perforation guns. The mass energy absorber comprises a mass and at least one absorber, and the at least one absorber is disposed between the mass and the perforating gun.
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Citations
18 Claims
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1. A perforation tool assembly, comprising
a perforation gun; - and
a mass energy absorber coupled to the perforation gun and configured to alter the propagation of mechanical energy released by firing one or more perforation guns, wherein the mass energy absorber comprises; a tool body, wherein the tool body is coupled to the perforation gun, wherein the tool body comprises a first end and a second end, and wherein a distance between the first end and the second end is fixed; a mass suspended within the tool body, wherein the mass is moveably suspended within the tool body; and at least one absorber, wherein the at least one absorber comprises a first absorber disposed between a first end of the mass and the first end of the tool body and a second absorber disposed between a second end of the mass and the second end of the tool body, wherein the mass is supported within the tool body by the first absorber and the second absorber, wherein the at least one absorber is disposed between the mass and the perforating gun, and wherein the first absorber has a different compliance than the second absorber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A perforation tool assembly, comprising:
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a plurality of perforation guns; and a mass energy absorber disposed between at least two of the plurality of perforation guns, wherein the mass energy absorber is configured to reduce the propagation of mechanical energy across the mass energy absorber, wherein the mass energy absorber comprises; a tool body, wherein the tool body comprises a first end and a second end, and wherein a distance between the first end and the second end is fixed; a mass suspended and enclosed within the tool body, wherein the mass is moveably suspended within the tool body; and at least one absorber, wherein the mass energy absorber comprises a first absorber disposed between a first end of the mass and the first end of the tool body and a second absorber disposed between a second end of the mass and the second end of the tool body, wherein the first absorber and the second absorber are configured to absorb energy and reduce the mechanical energy that propagates across the mass energy absorber, where the mechanical energy is released by firing one or more perforation guns of the plurality of perforation guns, and wherein the first absorber has a different mechanical energy absorption characteristic from the second absorber. - View Dependent Claims (9, 10, 11, 12)
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13. A method of perforating a casing string in a wellbore, comprising:
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modeling a wellbore; modeling a perforation tool assembly, wherein the perforation tool assembly comprises at least one perforation gun and a mass energy absorber, wherein the mass energy absorber comprises;
a tool body, a mass suspended and enclosed within the tool body, wherein the mass is moveably disposed within the tool body, and at least one absorber disposed between a first end of the mass and a first end of the tool body;simulating firing the at least one perforation gun; designing the mass energy absorber based on the simulating, wherein designing the mass energy absorber comprises selecting from a plurality of dense materials based on an analysis of energy attenuation and cost of the dense material; firing the first perforation gun when the first perforating gun is disposed in a wellbore; and attenuating a mechanical energy that propagates across the mass energy absorber, wherein the mechanical energy is associated with firing the first perforation gun. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification