Method for making a well perforating gun
View Patent ↗The invention relates to a method to make a perforating gun for use in oil and natural gas wells comprising the steps of: obtaining a length of a first tube; cutting scallop holes into the first tube forming an outer layer; placing the outer layer in a holder; cutting a second tube to the approximate length of the outer layer; pulling the second tube into the outer layer forming a laminate structure having a first and second end; repeating the process for a desired number of layers in the laminate structure; machining internal structures into the laminate structure; inserting the loading tube into the laminate structure; and forming thread protectors in the first end and the second end of the laminate structure.
1. A method to make a perforating gun for use in oil and natural gas wells comprising the steps of:
a. obtaining a length of a first tube;
b. cutting scallop holes into the first tube forming an outer layer;
c. placing the outer layer in a holder;
d. cutting a second tube to the approximate length of the outer layer;
e. pulling the second tube into the outer layer forming a laminate structure having a first and second end;
f. machining internal structures into the laminate structure; and
g. inserting a loading tube into the laminate structure.
2. The method of claim 1 , wherein steps d and e are repeated to create a desired number of layers in the laminate structure and then welding a first end coupling to the first end and the second end coupling to the second end.
3. The method of claim 1 , wherein the pulling of the second tube into the first tube is accomplished using a gear reduced drive and chain mechanism.
4. The method of claim 1 wherein the method comprises using a length of first tube between 1 foot and 40 feet.
5. The method of claim 1 , wherein the method comprises using a length of second tube between 1 foot and 40 feet.
6. The method of claim 1 , wherein the method comprises using first and second tubes with an outer diameter ranging between 1.5 inches and 7 inches.
7. The method of claim 1 , wherein the cutting of the scallops is by a laser or a drill.
8. The method of claim 1 , wherein the cutting of the scallops is performed using a mill.
9. The method of claim 1 , wherein the cutting of the scallops is at a density of at least 1 per foot of scallops.
10. The method of claim 1 , wherein the step of using a holder is performed by using a heavy walled tube that is at least 0.020 larger in diameter than the first tube.
11. The method of claim 1 , further comprising the step of forming thread protectors in the first end and the second end of the laminate structure.
12. The method of claim 11 , wherein the step of forming the thread protectors is performed on a lathe.
13. A method to make a perforating gun for use in oil and natural gas wells comprising the steps of:
a. obtaining a length of a first tube;
b. cutting scallop holes into the first tube forming an outer layer;
c. placing the outer layer in a holder;
d. cutting a second tube to a second length of tube which is the approximate length of the outer layer;
e. wrap wire around the second length of tube
f. pulling the second length of tube with the wire disposed thereon into the outer layer forming a laminate structure having a first and second end;
g. welding a first end coupling to the first end and the second end coupling to the second end;
h. inserting a loading tube into the laminate structure.
14. The method of claim 13 , wherein the pulling of the second tube into the first tube is accomplished using a gear reduced drive and chain mechanism.
15. The method of claim 13 wherein the method comprises using a length of first tube between 1 foot and 40 feet.
16. The method of claim 13 , wherein the method comprises using a length of second tube between 1 foot and 40 feet.
17. The method of claim 13 , wherein the method comprises using first and second tubes with an outer diameter ranging between 1.5 inches and 7 inches.
18. The method of claim 13 , wherein the cutting of the scallops is by a laser.
19. The method of claim 18 , wherein the cutting of the scallops is by a drill.
20. The method of claim 18 , wherein the cutting of the scallops is performed using a mill.
21. The method of claim 13 , wherein the cutting of the scallops is at a density of at least 1 per foot of scallops.
22. The method of claim 13 , wherein the step of using a holder is performed by using a heavy walled tube that is at least 0.020 larger in diameter than the first tube.
23. The method of claim 13 , further comprising the step of forming thread protectors in the first end and the second end of the laminate structure.
24. The method of claim 13 , wherein the step of wrapping the wire is performed by winding the wire in a first layer at an angle which is between 0 and 60 degrees from the horizontal axis of the second length of tube.
25. The method of claim 24 , wherein the step of wrapping the wire is performed by winding the wire in a second layer over the first layer at an angle which is between 0 and 60 degrees from the angle at which the first layer was wound.
26. The method of claim 25 , wherein the wrapping of the wire is repeated for up to 8 layers and wherein each layer is at an angle between 0 and 60 degrees from the angle of the prior layer.
27. The method of claim 13 , further comprising the step of using an epoxy, a binder, or other adhesive between the wire and the second length of tube.
28. The method of claim 25 , further comprising the step of using an epoxy, a binder, or other adhesive between the layers of wire.