Selectable, internally oriented and/or integrally transportable explosive assemblies

A well tool system, comprising:

• an explosive assembly comprising:
• an outer housing;
• first and second explosive components that are rotatable relative to the outer housing;
• a third explosive component non-rotatable relative to the outer housing and explosively coupled to the second explosive component;
• a selective firing module which causes detonation of the first, second, and third explosive components in response to receiving a predetermined signal associated with the selective firing module;
• and
• a rotary electrical connection coupled to the selective firing module and comprising an electrical contact, wherein the electrical contact is rotatable with the second explosive component when the second explosive component rotates relative to the outer housing.

A method of assembling a well tool system, comprising:

• assembling multiple explosive assemblies at a location remote from a well location, the assembling comprising:
• installing an electrical detonator and a first explosive component in a connector, wherein the first explosive component comprises a detonating cord;
• connecting the connector to an outer housing containing a second explosive component, wherein the second explosive component comprises a perforating charge and another detonating cord;
• and
• forming a rotary detonation coupling comprising first and second detonation boosters located between the first and second explosive components, wherein the rotary detonation coupling permits the first explosive component to rotate relative to the second explosive component after the connector and the outer housing are interconnected;
• and then
• transporting the explosive assemblies from the remote location to the well location,
• wherein each explosive assembly further comprises a rotary electrical connection coupled to a selective firing module, and
• wherein at least one electrical contact of the rotary electrical connection rotates with the second explosive component when the second explosive component rotates relative to the outer housing.

A method of assembling a well tool system, comprising:

• assembling multiple explosive assemblies at a location remote from a well location, the assembling comprising:
• installing an electrical detonator and a first explosive component in a connector, wherein the first explosive component comprises a detonating cord;
• connecting the connector to an outer housing containing a second explosive component, wherein the second explosive component comprises a perforating charge and another detonating cord;
• and
• forming a rotary detonation coupling comprising first and second detonation boosters located between the first and second explosive components;
• and then
• transporting the explosive assemblies from the remote location to the well location,
• wherein each explosive assembly further comprises a rotary electrical connection coupled to a selective firing module, and
• wherein at least one electrical contact of the rotary electrical connection rotates with the second explosive component when the second explosive component rotates relative to the outer housing.

A method of assembling a well tool system, comprising:

• assembling multiple explosive assemblies at a location remote from a well location, the assembling comprising:
• installing a selective firing module, an electrical detonator, and a first explosive component in a connector, wherein the first explosive component comprises a detonating cord;
• connecting the connector to an outer housing, the outer housing containing a second explosive component that is rotatable relative to the outer housing, wherein the second explosive component comprises a perforating charge and another detonating cord;
• and
• forming a rotary detonation coupling comprising first and second detonation boosters located between the first and second explosive components;
• and then
• transporting the explosive assemblies from the remote location to the well location,
• wherein each explosive assembly further comprises a rotary electrical connection coupled to the selective firing module, and
• wherein at least one electrical contact of the rotary electrical connection rotates with the second explosive component when the second explosive component rotates relative to the outer housing.

A well perforating method, comprising:

• assembling multiple perforating guns, each perforating gun comprising:
• an outer gun body;
• a perforating charge and a detonating cord that are rotatable relative to the outer gun body;
• a selective firing module which causes detonation of the perforating charge in response to receiving a predetermined signal associated with the selective firing module;
• and
• a rotary detonation coupling comprising first and second detonation boosters located between the selective firing module and the perforating charge;
• and
• installing the perforating guns in a wellbore, the perforating charge of each perforating gun rotating relative to the respective outer gun body during the installing,
• wherein the perforating gun further comprises a rotary electrical connection coupled to the selective firing module, and
• wherein at least one electrical contact of the rotary electrical connection rotates with the detonating cord when the detonating cord rotates relative to the outer gun body.

A well perforating method, comprising:

• assembling multiple perforating guns, each perforating gun comprising:
• an outer gun body;
• a perforating charge and a detonating cord that are rotatable relative to the outer gun body;
• a selective firing module and another detonating cord that are non-rotatable relative to the outer gun body and cause detonation of the perforating charge in response to receiving a predetermined signal associated with the selective firing module;
• and
• a rotary electrical connection coupled to the selective firing module and comprising at least one electrical contact that rotates with the detonating cord when the detonating cord rotates relative to the outer gun body;
• and
• installing the perforating guns in a wellbore, the perforating charge of each perforating gun rotating relative to the respective outer gun body during the installing.