Perforating gun assembly with reduced shock transmission
AssigneeHalliburton Energy Services, Inc.
InventorsBrenden Grove, Courtney Ann Thain Roberts, Jason Karl Cook, Christopher C Hoelscher
Life of this patent
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Abstract
A method and systems for perforating a formation surrounding a borehole that include placing a perforating gun assembly into the borehole, the perforating gun assembly including a gun body comprising a connector and a shaped charge within the gun body. The shaped charges are detonated, thereby producing a shock wave in the gun body. The shock wave propagating through the gun body is attenuated using a shock attenuation feature in the gun body to decrease a stress from the shock wave communicated to the connector.
Claims14
A method of perforating a formation surrounding a borehole, comprising:
- placing a perforating gun assembly into the borehole, the perforating gun assembly comprising a gun body comprising a gun body wall, a connector, and a shaped charge housed within the gun body wall, the gun body also comprising a longitudinal axis;
- detonating the shaped charge thereby producing a shock wave in the gun body;
- and
- attenuating the shock wave propagating through the gun body wall using a shock attenuation feature in the gun body wall, wherein the shock attenuation feature is longitudinally axially positioned intermediate the shaped charge and the connector, and wherein the shock attenuation feature is longitudinally axially spaced from the connector to decrease a stress from the shock wave communicated to the connector,
- wherein the shock attenuation feature comprises more than one groove, each groove being located at a longitudinal axial position of the gun body wall and comprising a pattern of groove segments spaced circumferentially around the gun body wall.
A perforating gun assembly for use in a borehole, comprising:
- a gun body comprising a longitudinal axis and:
- a gun body wall comprising a shock attenuation feature;
- a connector;
- a shaped charge supported within the gun body wall, detonation of which produces a shock wave that propagates within the gun body;
- wherein the shock attenuation feature is longitudinally axially positioned intermediate the shaped charge and the connector,
- wherein the shock attenuation feature is longitudinally axially spaced from the connector and configured to attenuate the shock wave within the gun body to decrease a stress communicated to the connector,
- wherein the shock attenuation feature comprises more than one groove at longitudinal axial positions of the gun body wall, groove comprising a pattern of groove segments spaced circumferentially around the gun body wall.
A perforation system for perforating a formation surrounding a borehole, the system comprising:
- perforating gun assemblies, each assembly comprising a gun body comprising a longitudinal axis and:
- a gun body wall comprising a shock attenuation feature, the shock attenuation feature comprises comprising more than one groove, each groove being located at a longitudinal axial position of the gun body wall and comprising a pattern of groove segments spaced circumferentially around the gun body wall;
- a threaded connector, wherein the threaded connector is longitudinally axially spaced from the shock attenuation feature;
- and
- a shaped charge supported within the gun body wall, detonation of which produces a shock wave that propagates within the gun body, wherein the shock attenuation feature is longitudinally axially positioned intermediate the shaped charge and the connector;
- and
- wherein the perforating gun assemblies are connected through the threaded connectors and each shock attenuation feature is located and configured to attenuate the shock waves within each respective gun body to decrease stress communicated from one assembly to another assembly through the threaded connectors.
Dependencies are inferred from the claim text.