Submersible pump drop pipe and casing assembly connection and method of manufacture

• US 6,666,480 B2
• Filed: 11/20/2001
• Issued: 12/23/2003
• Est. Priority Date: 11/20/2001
• Status: Expired due to Term

• Current Assignee: Johnson Screens Incorporated (Bilfinger Se)
• Original Assignee: Modern Products Industries, Inc.
• Inventors: Haney, Morris G., Thein, Roy L.
• Primary Examiner(s): Bochna, David
• Application Number:
  US09/989,512
• Publication Number:
  US 20030094814A1
• Time in Patent Office: 763 Days
• Field of Search: 285/333, 285/334, 285/390, 285/148.19, 285/357, 285/115, 285/423
• US Class Current: 285/390
• CPC Class Codes: E03B 3/16 Component parts of wells
• CPC Class Codes: E21B 17/042 Threaded
• CPC Class Codes: E21B 17/08 Casing joints
• CPC Class Codes: Y10T 29/49881 of separate helix [e.g., screw thread]

Abstract

A submersible pump drop pipe and casing assembly and method of manufacture is disclosed. The drop pipe/casing has a seated connector and base. The seated connector has a first and second cylinder section, the first cylinder section being used to align and direct the base into the seated connector and to provide lateral strength to the pipe.

Claims

1. A single piece polyvinyl chlorine (PVC) pipe of a predetermined interior diameter that has lateral strength when connected to a similar adjacent PVC pipe, said PVC pipe comprising;

a male end of said PVC pipe which has external threads;

a female end of said PVC pipe;

a first enlarged interior diameter of said PVC pipe at said female end, said first enlarged interior diameter being larger than said predetermined interior diameter and having internal threads to mate with said external threads of said male end for said similar adjacent PVC pipe;

a second enlarged interior diameter being larger than said first enlarged interior diameter and terminating said PVC pipe at said female end, said second enlarged interior diameter being (a) slightly larger in diameter than said male end of said similar adjacent PVC pipe to receive said male end therethrough and (b) long enough to provide said lateral strength when connected to said similar adjacent PVC pipe, said second enlarged interior diameter being at least long enough to received most of said external threads from said similar adjacent PVC pipe therein before threading;

said male end and said second enlarged interior diameter at said female end funneling said PVC pipe and said similar adjacent PVC pipe together;

said PVC pipe being reusable and of a substantially uniform circumference at the male end.

2. The PVC pipe of a predetermined interior diameter that has lateral strength when connected to said similar adjacent PVC pipe as recited in claim 1 wherein said male end or said female end is beveled to aid said funneling.

3. The PVC pipe of a predetermined interior diameter that has lateral strength when connected to said similar adjacent PVC pipe as recited in claim 1 wherein said first enlarged interior diameter of said female end PVC pipe is formed by expanding said female end while heated and pliable.

4. The PVC pipe of a predetermined interior diameter that has lateral strength when connected to said similar adjacent PVC pipe as recited in claim 1 wherein a connection with said similar adjacent PVC pipe will withstand approximately 1000 pounds of lateral force without leaking if said PVC pipe is a 2 inch diameter PVC pipe or proportionate amounts of lateral force for different diameter PVC pipe.

5. The PVC pipe of a predetermined interior diameter that has lateral strength when connected to said similar adjacent PVC pipe as recited in claim 1 wherein said external threads and said internal threads are triangularly threaded.

6. The PVC pipe of a predetermined interior diameter that has lateral strength when connected to said similar adjacent PVC pipe as recited in claim 1 wherein said external threads and said internal threads are squarely threaded.