Attachment 6 - Figures - Well Diagrams.pdf
PDF 61 KB Posted
- Attached to
- Subsurface Air Rotary Drilling
- Solicitation number
- 6100063456
- Issued by
- Cambria County, Pennsylvania
About this file
The document is a technical specification for well construction and abandonment diagrams, likely part of a state or local government infrastructure project. The file contains three detailed technical figures (Figure No. 1, 2, and 3) that illustrate different well completion and abandonment techniques, including typical above-ground level completion, flush mount completion, and borehole abandonment methods. These diagrams provide standardized technical guidance for constructing and sealing boreholes, with specific details about casing types, cement grouting, surface treatments, and geological considerations.
The diagrams specify technical requirements such as minimum depths for grout seals (10 feet), surface casing specifications, and materials to be used in different stages of well construction and closure. The figures include provisions for various geological conditions, such as rock strata, overburden, and potential void or coal seam scenarios. A notable technical note indicates that in cases of significant water quantities in bedrock, a bentonite seal might be required below the aquifer. The drawings are not to scale but provide comprehensive technical guidance for contractors on proper well construction and abandonment protocols.
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Text version
Overburden
4 ft
TARGET DEPTH
Grout Basket
Min 10 ft Grout Seal
Stemming (Approved Material) or
Cement Grout
FIGURE NO. 1
Rock Strata
TYPICAL ABOVE GROUND LEVEL COMPLETION
Plastic or Steel Casing
(not to scale)
Min 18 inches
Locking Cap of
Contractor Design
Ground LevelSurface Casing
Cement Grout
Overburden
4 ft
TARGET DEPTH
Grout Basket
Min 10 ft Grout Seal
Stemming (Approved Material) or
Cement Grout
TYPICAL FLUSH MOUNT COMPLETION
Plastic or Steel Casing
(not to scale)
FIGURE NO. 2
Slip Fit Casing
Cap/Cover
Cement Grout
Ground Level
Surface Casing
Rock Strata
Void or Coal Seam
Ground Level
PLUG of Contractors Choice
Min 10 Ft Cement Seal
BOREHOLE ABANDONMENT
Not to Scale
Overburden
Crushed Stone, Sand, Gravel or Drill Cuttings
Cement Plug
Topsoil or Pavement
• In the event significant quantities of water encountered in the bedrock, a Bentnite Seal might be required to be set below the Aquifer.
FIGURE NO. 3
Uncased Borehole
ROCK STRATA
| Slide 1 |
| Slide 2 |
| Slide 3 |
File details come from the government source that posted it. Updated .