Definition(s)
Surface Casing
Casing that is run inside the conductor casing to protect shallow water zones and weaker formations
- Note: 1 to entry: Surface casing can be cemented within the conductor casing and is often cemented back to the mud-line or surface.
- Note: 2 to entry: The surface wellhead is normally installed on this casing for surface wells.
[SOURCE: API RP 90, modified]
Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Surface Casing
See casing.
Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards
Surface Casing
The first string of casing to be set and cemented in a well, the principal purpose of which is to protect fresh water aquifers. It also prevents lost circulation while drilling deeper, supports blowout prevention equipment (if used), and supports deeper casing strings and the tubing.
Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Surface
Casing including HPWHH (first casing string attached to subsea BOPs. Normal clearance casing OD in.: 20. Tight clearance casing OD in.: 22. NOTE These are examples only. Each well can have variations in number of casing strings and sizes. Naming conventions can vary. The heavy-wall surface casing designs may allow 13 5/8 in. to be run as a liner and not tied back.
Source: API RP 96, Deepwater Well Design and Construction, First Edition, March 2013. Global Standards
Surface Casing
“Surface casing” means a string of casing set and cemented in a well to prevent lost circulation while drilling deeper and to protect strata known or reasonably expected to serve as a source of drinking water for human consumption; usually “surface casing” is the first string of casing upon which BOPE is set.
Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. Regulations
Surface Casing
“Surface casing” means the casing that is installed in a well to a sufficient depth, in a competent formation, to establish well control for the continuation of the drilling operations (tubage de surface).
Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations
Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance
Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. Regulations
Surface Casing
“Surface casing” means a string of casing set and cemented to isolate and protect the deepest underground source of drinking water and to serve as a base for well control equipment.
Source: Division of Mineral Resources Management – Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations
Surface Casing
“Surface casing” means any casing placed in the well bore for the purpose of protecting fresh water strata and other reservoir rock, and/or for the prevention of the invasion of fresh water into the well bore.
Source: Division of Mineral Resources Management – Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations
Surface Casing
“Surface casing” means the first casing string designed and run to protect the treatable water formations and/or control fluid or gas flow from the well.
Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations
Surface Casing
“Surface casing—A string or strings of casing used to isolate the wellbore from fresh groundwater and to prevent the escape or migration of gas, oil or other fluids from the wellbore into fresh groundwater. The surface casing is also commonly referred to as the water string or water casing.
Source: Oil and Gas Wells, Pennsylvania Code, Title 25, Chapter 78, December 2012. Regulations
Surface Casing
Casing run inside the conductor casing to protect shallow water zones and weaker formations and may be cemented within the conductor string and is often cemented back to the mudline. The surface wellhead is normally installed on this string for surface wells.
Source: API RP 90, Annular Casing Pressure Management for Offshore Wells, Upstream Segment. First Edition, August 2006. Global Standards