Positioning device for shaped charges in a perforating gun module
A positioning device includes a shaped charge holder. A plurality of shaped charge receptacles formed in the shaped charge holder are configured to arrange a plurality of shaped charges in a desired orientation. The shaped charges are detonated by a detonator in response to an initiation signal. The positioning device may be secured in a perforating gun module, with vertical and horizontal movement of the positioning being inhibited in the perforating gun module.
1. A holding device comprising:
a shaped charge holder comprising:
a body comprising a plurality of shaped charge receptacles;
a plurality of retention mechanisms extending from a portion of the body, wherein each one of the plurality of retention mechanisms is configured to retain a shaped charge within a shaped charge receptacle of the plurality of shaped charge receptacles; and
a cavity extending through the body along a central axis of the body, wherein
each of the plurality of shaped charge receptacles extends radially from the central axis of the body and the plurality of shaped charge receptacles are arranged in a single axial plane, and
each of the plurality of shaped charge receptacles is configured for receiving the shaped charge in a configuration for directly initiating the shaped charge without the use of a detonating cord.
2. The holding device of claim 1 , wherein the cavity and each of the plurality of shaped charge receptacles are together configured for exposing an initiation point of the shaped charge adjacent to the cavity.
3. The holding device of claim 1 , further comprising a booster positioned at least in part within the cavity, wherein each of the plurality of shaped charge receptacles is configured for receiving the shaped charge in a configuration for directly initiating the shaped charge using the booster.
4. The holding device of claim 3 , wherein the booster is initiated by a detonator.
5. The holding device of claim 1 , wherein the body is a unitary structure formed from a plastic material.
6. The holding device of claim 1 , wherein each of the plurality of shaped charge receptacles is spaced from 60 degrees to 120 degrees around the central axis.
7. The holding device of claim 1 , wherein each of the plurality of shaped charge receptacles is configured such that at least a portion of the shaped charge is recessed within the body.
8. The holding device of claim 1 , further comprising:
one or more sets of additional shaped charge receptacles, wherein each set of the additional shaped charge receptacles is arranged an additional axial plane spaced apart from the single axial plane.
9. A holding device comprising:
a ballistic holder comprising:
a channel dimensioned for receiving a detonator; and
a shaped charge holder connected to the ballistic holder, the shaped charge holder comprising:
a body comprising three shaped charge receptacles extending from a central axis of the body, and a plurality of retention mechanisms;
a cavity extending through the body along the central axis of the body, wherein
each shaped charge receptacle of the three shaped charge receptacles extends radially from the central axis of the body and the three shaped charge receptacles are arranged in a single axial plane, and
each retention mechanism of the plurality of retention mechanisms extend from a portion of the body; and
a plurality of shaped charges, wherein
each shaped charge of the plurality of shaped charges is respectively secured within a corresponding one of the three shaped charge receptacles by one of the plurality of retention mechanisms,
the one of the plurality of retention mechanisms is configured to receive the shaped charge secured within the corresponding one of the three shaped charge receptacles and is secured into a groove formed into a wall of the shaped charge,
wherein each one of the three shaped charge receptacles is configured for receiving and retaining each shaped charge of the plurality of shaped charges in a configuration for directly initiating each shaped charge of the plurality of shaped charges without the use of a detonating cord or a booster device, such that the detonator is in direct ballistic communication with each shaped charge of the plurality of shaped charges.
10. The holding device of claim 9 , wherein each of the plurality of shaped charge receptacles comprises a recess formed in the body.
11. The holding device of claim 9 , wherein the body is a single unitary structure formed from a plastic material.
12. The holding device of claim 10 , wherein the recess and respective retention mechanism of the corresponding one of the three shaped charge receptacles are together configured to guide placement and orientation of the respective shaped charge secured within the corresponding one of the three shaped charge receptacles.
13. The holding device of claim 9 , wherein each shaped charge receptacle of the three shaped charge receptacles is configured such that at least a portion of each the shaped charge of the plurality of shaped charges is recessed within the body.
14. A perforating gun assembly comprising:
a perforating gun housing comprising:
a first housing end;
a second housing end; and
a chamber extending from the first housing end to the second housing end;
a holding device positioned in the chamber, the holding device comprising:
a ballistic holder including a channel, and a detonator secured in the channel; and
a shaped charge holder connected to the ballistic holder, the shaped charge holder comprising:
a body;
a cavity extending through a central axis of the body and in open communication with the channel of the ballistic holder;
a plurality of shaped charge receptacles formed in the body, wherein the plurality of shaped charge receptacles extends radially from the central axis of the body and are arranged in a single axial plane; and
a plurality of retention mechanisms extending from a portion of the body adjacent the shaped charge receptacles, wherein the retention mechanisms are biased in a radial direction;
a plurality of shaped charges, wherein each shaped charge of the plurality of shaped charge receptacles is arranged and retained in a respective shaped charge receptacle of the plurality of shaped charge receptacles in the single axial plane and the detonator is in direct ballistic communication with the plurality of shaped charges such that the plurality of shaped charges are detonated without a detonating cord; and
an electrical contact secured to the holding device,
wherein the perforating gun housing is configured to be connected to an adjacent perforating gun housing without the use of a tandem sub adapter and the chamber of the perforating gun housing is sealed from the adjacent perforating gun housing without the use of the tandem sub adapter.
15. The perforating gun assembly of claim 14 , wherein the perforating gun housing comprises a length of 8 inches to 9 inches.
16. The perforating gun assembly of claim 14 , wherein
the first housing end of the perforating gun housing comprises a plurality of internal threads and the second housing end of the perforating gun housing comprises a plurality of external threads,
wherein the plurality of internal threads are configured for connecting to complimentary external threads on the adjacent perforating gun housing, and the plurality of external threads are configured for connecting to complimentary internal threads on the adjacent perforating gun housing, without the use of the tandem sub adapter.
17. The perforating gun assembly of claim 14 , wherein the electrical contact comprises:
a ground bar configured to contact a portion of the perforating gun housing or the adjacent perforating gun housing.
18. The perforating gun assembly of claim 14 ,
wherein the detonator initiates a booster positioned adjacent the plurality of shaped charges, and the booster is configured to initiate the plurality of shaped charges.
19. The holding device of claim 18 , wherein
the channel of the ballistic holder is dimensioned for receiving the detonator,
the cavity is dimensioned for receiving the booster,
the booster is initiated by the detonator, and
the shaped charges are initiated by the booster.
20. The perforating gun assembly of claim 14 , further comprising:
one or more sets of additional shaped charge holders comprising additional shaped charge receptacles, wherein each set of the additional shaped charge holders is arranged in a corresponding additional axial plane spaced apart from the single axial plane and other additional axial planes;
a booster in ballistic communication with the detonator; and
one or more additional sets of shaped charges, wherein each one of the additional sets of shaped charges is secured in one of the additional shaped charge receptacles, such that the one or more additional sets of shaped charges is in ballistic communication with the booster.
21. The perforating gun assembly of claim 14 , wherein the perforating gun housing further comprises:
a slot formed in an inner surface of the perforating gun housing, the slot being configured to receive a protrusion extending from the holding device, to orient the holding device in the chamber of the perforating gun housing.