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A rust resistant well perforating gun to fractionate a formation adjacent a well can include a gun carrier with recesses, threaded sections, seal bores, and a first coating to prevent rust. The rust resistant well perforating gun can have a charge loading tube for slidably engaging with the gun carr

A rust resistant well perforating gun to fractionate a formation adjacent a well can include a gun carrier with recesses, threaded sections, seal bores, and a first coating to prevent rust. The rust resistant well perforating gun can have a charge loading tube for slidably engaging with the gun carrier. The charge loading tube can have charge holes, rear charge holes, end caps, and a second coating to prevent rust.

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1. A rust resistant well perforating gun for insertion into a well bore of a well, wherein the rust resistant well perforating gun comprises: a. a gun carrier comprising: (i) a gun wall annulus and an outer surface;(ii) a first threaded section formed in the gun wall annulus proximate a first end of

1. A rust resistant well perforating gun for insertion into a well bore of a well, wherein the rust resistant well perforating gun comprises: a. a gun carrier comprising: (i) a gun wall annulus and an outer surface;(ii) a first threaded section formed in the gun wall annulus proximate a first end of the gun carrier, and a second threaded section formed in the gun wall annulus proximate a second end of the gun carrier; and(iii) a first seal bore formed in the gun wall annulus between the first threaded section and the first end of the gun carrier, and a second seal bore formed in the gun wall annulus between the second threaded section and the second end of the gun carrier;b. a charge loading tube configured to engage within the gun wall annulus, wherein the charge loading tube comprises: (i) a charge loading tube inner surface;(ii) a charge loading tube outer surface;(iii) a plurality of charge holes disposed through the charge loading tube; and(iv) a plurality of rear charge holes disposed through the charge loading tube, wherein each rear charge hole is concentrically aligned one of the charge holes; andc. a first end cap disposed on a first end of the charge loading tube, and a second end cap disposed on a second end of the charge loading tube, wherein the end caps have a diameter larger than the charge loading tube outer surface forming a gap between the charge loading tube outer surface and the gun wall annulus when the charge loading tube is engaged within the gun wall annulus, and wherein the rust resistant well perforating gun further comprises: (i) a first coating disposed over the gun carrier, a second coating disposed over the charge loading tube, and a third coating disposed over the end caps, wherein the first coating, the second coating, and the third coating are each configured to prevent rust;(ii) a first gripping surface formed on the outer surface of the gun carrier proximate the first end of the gun carrier and a second gripping surface formed on the outer surface of the gun carrier proximate the second end of the gun carrier; or(iii) both the first coating disposed over the gun carrier, the second coating disposed over the charge loading tube, and the third coating disposed over the end caps, wherein the first coating, the second coating, and the third coating are each configured to prevent rust and the first gripping surface formed on the outer surface of the gun carrier proximate the first end of the gun carrier and the second gripping surface formed on the outer surface of the gun carrier proximate the second end of the gun carrier. 2. The rust resistant well perforating gun of claim 1, wherein the first gripping surface and the second gripping surface each comprise: knurling, scoring, or turned bands. 3. The rust resistant well perforating gun of claim 1, wherein the first gripping surface and the second gripping surface are configured to be engaged by wrenches or other tooling for quickly and safely assembling the rust resistant well perforating gun; thereby reducing an occurrence of slippage of the wrenches or other tooling, reducing wear on the wrenches or other tooling, and reducing an occurrence of injuries associated with slipping wrenches and other tooling. 4. The rust resistant well perforating gun of claim 1, further comprising: a. a plurality of charges, wherein each charge is engaged within one of the charge holes and one of the rear charge holes; andb. a detonation cord engaged with each charge and connected to an actuator, wherein the actuator is configured to actuate the plurality of charges through the detonation cord. 5. The rust resistant well perforating gun of claim 1, wherein: a. the first coating comprises a first zinc metal coating disposed on the gun carrier and a first chromate coating disposed over the first zinc metal coating;b. the second coating comprises a second zinc metal coating disposed on the charge loading tube and a second chromate coating disposed over the second zinc metal coating; andc. the third coating comprises a third zinc metal coating disposed on the charge loading tube and a third chromate coating disposed over the third zinc metal coating. 6. The rust resistant well perforating gun of claim 5, wherein the first chromate coating, second chromate coating, and third chromate coating are each a clear chromate coating, a yellow chromate coating, or another colored chromate coating. 7. The rust resistant well perforating gun of claim 1, wherein the first coating, the second coating, and the third coating are each selected from the group consisting of: a metal coating, a metal phosphate coating, a black oxide coating, a powder coating, and a paint coating. 8. The rust resistant well perforating gun of claim 7, wherein: a. the metal coating is zinc, platinum, palladium, nickel, silver, gold, aluminum, or tin; andb. the metal phosphate coating is zinc phosphate, manganese phosphate, or iron phosphate. 9. The rust resistant well perforating gun of claim 7, wherein the metal coating has a melting point over seven degrees Fahrenheit, a Young's modulus of one hundred gigapascals, and a Mohs hardness of at least 2.5. 10. The rust resistant well perforating gun of claim 7, wherein: a. the metal phosphate coating has a thickness ranging from 0.00015 inches to 0.001 inches;b. the metal coating has a thickness ranging from 0.00015 inches to 0.001 inches; orc. both the metal phosphate coating has the thickness ranging from 0.00015 inches to 0.001 inches and the metal coating has the thickness ranging from 0.00015 inches to 0.001 inches. 11. The rust resistant well perforating gun of claim 1, further comprising a lubricant, sealer, or oil disposed over the first coating, the second coating, or both the first coating and the second coating. 12. The rust resistant well perforating gun of claim 1, further comprising a plurality of recesses formed in the outer surface, wherein each recess is formed to a predetermined depth in the outer surface. 13. The rust resistant well perforating gun of claim 1, wherein the gun carrier comprises carbon steel or carbon alloy steel. 14. The rust resistant well perforating gun of claim 1, wherein: a. the end caps comprise aluminum, high density plastic, carbon steel, or zinc casting;b. the end caps are secured to the charge loading tube with a threaded connection, fasteners, a weld, a forced fit, or a twist lock; orc. both the end caps comprise aluminum, high density plastic, carbon steel, or zinc casting and the end caps are secured to the charge loading tube with a threaded connection, fasteners, a weld, a forced fit, or a twist lock. 15. The rust resistant well perforating gun of claim 1, further comprising connector structures on the gun carrier allowing multiple rust resistant well perforating guns to be connected together to form a multi-tube construction. 16. The rust resistant well perforating gun of claim 1, wherein one of the threaded sections comprises a keyway, wherein the charge loading tube comprises an offset surface, and wherein the offset surface is configured to engage with the keyway to align the charge loading tube with the gun carrier. 17. The rust resistant well perforating gun of claim 1, further comprising a plurality of charge retaining cutouts disposed through the charge loading tube, wherein each charge retaining cutout is configured to receive and retain at least one charge. 18. The rust resistant well perforating gun of claim 1, further comprising a message area disposed on or through the charge loading tube outer surface. 19. A rust resistant well perforating gun for insertion into a well bore of a well, wherein the rust resistant well perforating gun comprises: a. a gun carrier comprising: (i) a gun wall annulus and an outer surface;(ii) a first threaded section formed in the gun wall annulus proximate a first end of the gun carrier, and a second threaded section formed in the gun wall annulus proximate a second end of the gun carrier;(iii) a first seal bore formed in the gun wall annulus between the first threaded section and the first end of the gun carrier, and a second seal bore formed in the gun wall annulus between the second threaded section and the second end of the gun carrier; and(iv) a first gripping surface formed on the outer surface of the gun carrier proximate the first end of the gun carrier, and a second gripping surface formed on the outer surface of the gun carrier proximate the second end of the gun carrier;b. a charge loading tube configured to engage within the gun wall annulus, wherein the charge loading tube comprises: (i) a charge loading tube inner surface;(ii) a charge loading tube outer surface;(iii) a plurality of charge holes disposed through the charge loading tube; and(iv) a plurality of rear charge holes disposed through the charge loading tube, wherein each rear charge hole is concentrically aligned one of the charge holes; andc. a first end cap disposed on a first end of the charge loading tube, and a second end cap disposed on a second end of the charge loading tube, wherein the end caps have a diameter larger than the charge loading tube outer surface forming a gap between the charge loading tube outer surface and the gun wall annulus when the charge loading tube is engaged within the gun wall annulus. 20. A rust resistant well perforating gun for insertion into a well bore of a well, wherein the rust resistant well perforating gun comprises: a. a gun carrier comprising: (i) a gun wall annulus and an outer surface;(ii) a first threaded section formed in the gun wall annulus proximate a first end of the gun carrier, and a second threaded section formed in the gun wall annulus proximate a second end of the gun carrier; and(iii) a first seal bore formed in the gun wall annulus between the first threaded section and the first end of the gun carrier, and a second seal bore formed in the gun wall annulus between the second threaded section and the second end of the gun carrier;b. a first coating disposed over the gun carrier, wherein the first coating is configured to prevent rust;c. a charge loading tube configured to engage within the gun wall annulus, wherein the charge loading tube comprises: (i) a charge loading tube inner surface;(ii) a charge loading tube outer surface;(iii) a plurality of charge holes disposed through the charge loading tube; and(iv) a plurality of rear charge holes disposed through the charge loading tube, wherein each rear charge hole is concentrically aligned one of the charge holes;d. a second coating disposed over the charge loading tube, wherein the second coating is configured to prevent rust;e. a first end cap disposed on a first end of the charge loading tube, and a second end cap disposed on a second end of the charge loading tube, wherein the end caps have a diameter larger than the charge loading tube outer surface forming a gap between the charge loading tube outer surface and the gun wall annulus when the charge loading tube is engaged within the gun wall annulus; andf. a third coating disposed over the end caps, wherein the third coating is configured to prevent rust, and wherein the first coating comprises a first zinc metal coating disposed on the gun carrier and a first chromate coating disposed over the first zinc metal coating, the second coating comprises a second zinc metal coating disposed on the charge loading tube and a second chromate coating disposed over the second zinc metal coating, and the third coating comprises a third zinc metal coating disposed on the charge loading tube and a third chromate coating disposed over the third zinc metal coating.