Perforation gun with angled shaped charges
OwnerJoseph A Sites, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A perforation gun which provides a means to create perforations required for the hydraulic fracturing of rock formations for the production of natural gas, oil, and other oil well fluids and further comprises a gun body assembly having an inserted carrier tube to nest shaped charge canisters with built in primers, conical liner, and explosive material. The charges are positioned in various angular patterns along various phase angles to create specifically directed perforation tunnels which puncture scalloped areas of the aforementioned gun body and subsequently penetrate through the wellbore, well casing, well cement, and into the rock formations for the release and removal of natural gas, oil, and other oil well fluids after hydraulic fracturing.
Claims40
A perforation gun, comprising:
- an outer gun body assembly having a first straight steel pipe with internal female threads at each end, a plurality of external recessed areas, and an orientation slot extending inward from one end of said first straight steel pipe;
- a carrier tube assembly having a linear charge tube which has an external surface, a first collar having an external alignment pin dimensioned to slide into said orientation slot, said first collar fits over one end of said charge tube into an installed position radially outward of said external surface, a second collar that fits over the opposite end of said charge tube, a plurality of shaped charge saddle slots through said charge tube, and a plurality of corresponding shaped charge body apertures through said charge tube, wherein said each of said plurality of shaped charge saddle slots and corresponding ones of said plurality of shaped charge body apertures form a plurality of shaped charge holders, and wherein said charge tube is a length of a second straight steel pipe slightly shorter than said outer gun body assembly;
- and
- a plurality of shaped charges, each:
- having a shaped charge saddle, each having a charge base, and each of which is located received and restrained in an associated shaped charge holder one of said plurality of shaped charge holders by its respective shaped charge saddle inserted in a corresponding shaped charge saddle slot and being angularly adjustable therein;
- wherein said carrier tube assembly is inserted into said outer gun body assembly such that said alignment pin slides into said orientation slot so as to control the orientation of said plurality of shaped charges with respect to said external recessed areas;
- and
- wherein said first collar is locked into position relative to said charge tube by insertion of said alignment pin in said orientation slot.
A perforation gun for creating a pattern of perforation tunnels in at least one of a well casing and a rock formation, said perforation gun comprising:
- an outer gun body having an interior space, an exterior surface and a longitudinal axis, said exterior surface having a plurality of recessed areas forming a spiral pattern along said longitudinal axis;
- and
- a carrier selectively axially mounted in a preselected position within said interior space of said outer gun body, said carrier having:
- a longitudinal axis coincident with said longitudinal axis of said outer gun body;
- an axis perpendicular to and extending outwardly from said longitudinal axis at a preselected point along said longitudinal axis dividing said longitudinal axis into two portions;
- a plurality of shaped charge bodies;
- and
- a plurality of spaced apart shaped charge holders, extending along said longitudinal axis, sized and shaped to:
- (i) receive and restrain each of said plurality of shaped charge bodies interiorly adjacent to corresponding ones of said plurality of recessed areas of said outer gun body and form a coincident preselected spiral pattern along with longitudinal axis;
- and (ii) expel a focused explosive charge therefrom along a charge vector extending radially outwardly from said longitudinal axis and forming an included phase angle with said perpendicular axis;
- at least a plural portion of said plurality of said shaped charge holders being mounted in a preselected pattern along said longitudinal axis such that said charge vectors are non-intersecting and independently form monotonically decreasing included phase angles with respect to perpendicular axis creating a limited entry explosive pattern.
Dependencies are inferred from the claim text.