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US 8,769,795 B2Granted
Method for making a rust resistant well perforating gun with gripping surfaces
OwnerEdward Cannoy Kash, James Edward Kashinventors
Life of this patent
Estimating the term…
Abstract
A method for perforating a well using a rust resistant well perforating gun can include disposing coatings over the rust resistant well perforating gun to prevent rust, loading a charge into a charge hole, engaging a detonation cord with the charge and an actuator, engaging the charge loading tube into the gun carrier, lowering the rust resistant well perforating gun into the well, actuating the actuator, and exploding the charge to: form a high pressure in the gap, allow jets to pierce the recesses to produce high energy pulses, and fractionate the formation using the high energy pulses.
Claims20
A method for making a well perforating gun to have rust resistance and gripping surfaces, the method comprising:
- a. forming 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. forming 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;
- c. forming a first end cap disposed on a first end of the charge loading tube, and forming 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
- d. applying a first coating over the gun carrier, applying a second coating disposed over the charge loading tube, and applying a third coating over the end caps, wherein the first coating, the second coating, and the third coating are configured to prevent rust or forming a first gripping surface on the outer surface of the gun carrier proximate the first end of the gun carrier and forming a second gripping surface on the outer surface of the gun carrier proximate the second end of the gun carrier.
11 more elements
A method for making a well perforating gun to have rust resistance and gripping surfaces, the method comprising:
- a. forming 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. forming a first gripping surface 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;
- c. forming 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;
- and
- d. forming a first end cap disposed on a first end of the charge loading tube, and forming 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
- e. applying a coating over the gun carrier.
13 more elements
A method for making a well perforating gun to have rust resistance and gripping surfaces, the method comprising:
- a. forming 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. applying a first coating over the gun carrier, wherein the first coating is configured to prevent rust;
- c. forming 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. applying a second coating disposed over the charge loading tube, wherein the second coating is configured to prevent rust;
- e. forming a first end cap disposed on a first end of the charge loading tube, and forming 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
- f. applying a third coating 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.
13 more elements
Dependencies are inferred from the claim text.