Method and apparatus for inspecting subsurface environments

• US 5,123,492 A
• Filed: 03/04/1991
• Issued: 06/23/1992
• Est. Priority Date: 03/04/1991
• Status: Expired due to Fees

• Current Assignee: Theodore J. Jr. Lizanec
• Original Assignee: Theodore J. Jr. Lizanec
• Inventors: Lizanec, Theodore J. Jr.
• Primary Examiner(s): Neuder, William P.
• Application Number:
  US07/664,230
• Time in Patent Office: 477 Days
• Field of Search: 175/45, 175/49, 166/250, 166/253, 166/254, 166/255, 166/242
• US Class Current: 175/49
• CPC Class Codes: E21B 17/00 Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
• CPC Class Codes: E21B 17/18 Pipes provided with plural fluid passages E21B17/203 takes precedence
• CPC Class Codes: E21B 43/04 Gravelling of wells
• CPC Class Codes: E21B 47/002 by visual inspection

Abstract

Methods for visual inspection of subsurface environments by emplacing a substantially visually clear pipe or casing into the subsurface environment and thereafter introducing visual inspection, means, such as a video camera, into the pipe, whereby inspection of the subsurface environments may be accomplished directly through the wall of the pipe. The inspection may also be accomplished by emplacing an opaque pipe provided with spaced part visually clear windows into the subsurface, and thereafter introducing visual inspection means into the pipe to inspect subsurface environments through the windows of the pipe. The invention additionally includes improved piping or casing which is constructed of typical opaque materials such as steel, but which is provided with visually clear windows appropriately spaced throughout the casing.

Claims

1. A method for visually inspecting subsurface environments at varying levels comprising emplacing a substantially visually clear pipe into said subsurface environment and thereafter introducing visual inspection means into said pipe whereby inspection of said subsurface environments may be accomplished directly through the wall of said pipe.

2. The method of claim 1 wherein said pipe is emplaced by advancing a well point of substantially clear construction.

3. The method of claim 1 wherein an excavation is made into said subsurface environment prior to emplacing said pipe.

4. The method of claim 2 wherein said inspection means include photographic means.

5. The method of claim 3 wherein said inspection means include photographic means.

6. The method of claim 5 wherein said photographic means includes a closed circuit television camera.

7. The method of claim 6 wherein said excavation is a borehole and wherein said pipe serves to maintain the integrity of said borehole and to allow inspection by said television camera through the wall of said pipe.

8. A method of completing water walls comprising providing a borehole into the subsurface environment to a water bearing subsurface area, emplacing into said borehole a well point attached to a substantially visually clear casing into said water bearing area, whereby water may be recovered from said water bearing area and inspection means may be lowered into said casing to inspect the subsurface environment surrounding said casing and condition of said casing.

9. A method for visually inspecting the filter pack in a ground water production well comprising emplacing a substantially visually clear pipe within the filter pack surrounding the casing of well and immediately adjacent to said well casing, and thereafter introducing inspection means into said substantially clear pipe whereby inspection of said filter pack and well casing may be accomplished.

10. The method of claim 9 wherein said substantially clear pipe is emplaced within said filter pack and immediately adjacent to the annulus of the borehole of said well whereby inspection of said filter pack and borehole annulus may be accomplished.

11. A length of pipe useful as a casing for ground water wells and for inspection of subsurface environments comprising a length of pipe the walls of which are manufactured from an opaque material and wherein spaced apart, visually clear windows are provided throughout the length of said pipe whereby inspection means can be inserted into the interior of said pipe to inspect areas surrounding the exterior of said pipe.

12. The pipe of claim 11 wherein said opaque walls are steel.

13. The pipe of claim 12 wherein said visually clear windows are formed of PVC.

14. A method for visually inspecting subsurface environments at varying levels comprising emplacing an opaque pipe provided with spaced apart visually clear windows into said subsurface environments and thereafter introducing visual inspection means into said pipe whereby inspection of said subsurface environments may be accomplished directly through the wall of said pipe.

15. The method of claim 14 wherein said opaque pipe is made from steel and said visually clear windows are formed of PVC.