Casing string - Revision history

Gower: +file

2025-06-08T06:02:20Z

+file

← Previous revision		Revision as of 06:02, 8 June 2025
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	{{Technical\|date=November 2020}}		{{Technical\|date=November 2020}}
			[[File:Casing & Temporary Home.JPG\|thumb\|Oil drilling casing string parts]]

	In drilling technology, '''casing string''' is a long section of connected oilfield pipes that is lowered into an [[oil well\|wellbore]] and cemented in place. The purpose of the casing pipe is to:		In drilling technology, '''casing string''' is a long section of connected oilfield pipes that is lowered into an [[oil well\|wellbore]] and cemented in place. The purpose of the casing pipe is to:

149.115.59.167: Improved grammar, wording, and concision slightly.

2025-04-03T18:01:56Z

Improved grammar, wording, and concision slightly.

Paul 012: Reverted 2 edits by Joshua Doubek (talk): Reverting image spam; user has been adding lots of images without consideration of relevnce or redundance. If this one is appropriate, feel free to restore it.

2021-01-28T00:55:34Z

Reverted 2 edits by Joshua Doubek (talk): Reverting image spam; user has been adding lots of images without consideration of relevnce or redundance. If this one is appropriate, feel free to restore it.

← Previous revision		Revision as of 00:55, 28 January 2021
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	* prevent formation fluids from entering the borehole in an uncontrolled way (blow out)		* prevent formation fluids from entering the borehole in an uncontrolled way (blow out)
	* prevent fluids in the borehole ( such as produced oil or gas, drilling mud etc.) from entering other formations		* prevent fluids in the borehole ( such as produced oil or gas, drilling mud etc.) from entering other formations

	[[File:Casing String.jpg\|thumb\|Casing String]]
	==Background==		==Background==
	The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)		The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)
Line 19:		Line 19:

	Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. Great care must therefore be taken when designing an economic casing programme that will meet the requirements of the well.		Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. Great care must therefore be taken when designing an economic casing programme that will meet the requirements of the well.

	[[File:Drill Casing.jpg\|thumb\|Drill Casing]]
	[[File:Drifting the Casing.jpg\|thumb\|Drifting the Casing]]

	==References==		==References==

Joshua Doubek: Casing String

2021-01-27T22:48:27Z

Casing String

← Previous revision		Revision as of 22:48, 27 January 2021
Line 6:		Line 6:
	* prevent formation fluids from entering the borehole in an uncontrolled way (blow out)		* prevent formation fluids from entering the borehole in an uncontrolled way (blow out)
	* prevent fluids in the borehole ( such as produced oil or gas, drilling mud etc.) from entering other formations		* prevent fluids in the borehole ( such as produced oil or gas, drilling mud etc.) from entering other formations
			[[File:Casing String.jpg\|thumb\|Casing String]]

	==Background==		==Background==
	The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)		The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)

Joshua Doubek: Casing

2021-01-27T21:45:11Z

Casing

← Previous revision		Revision as of 21:45, 27 January 2021
Line 19:		Line 19:

	Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. Great care must therefore be taken when designing an economic casing programme that will meet the requirements of the well.		Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. Great care must therefore be taken when designing an economic casing programme that will meet the requirements of the well.

			[[File:Drill Casing.jpg\|thumb\|Drill Casing]]
			[[File:Drifting the Casing.jpg\|thumb\|Drifting the Casing]]

	==References==		==References==

AnomieBOT: Dating maintenance tags: {{Technical}}

2020-11-13T00:39:18Z

Dating maintenance tags: {{Technical}}

← Previous revision		Revision as of 00:39, 13 November 2020
Line 1:		Line 1:
	{{Technical\|November 2020}}		{{Technical\|date=November 2020}}

	In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented. The purpose of the casing pipe is as follows:		In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented. The purpose of the casing pipe is as follows:

Zkidwiki at 22:38, 12 November 2020

2020-11-12T22:38:45Z

← Previous revision		Revision as of 22:38, 12 November 2020
Line 1:		Line 1:
			{{Technical\|November 2020}}

	In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented. The purpose of the casing pipe is as follows:		In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented. The purpose of the casing pipe is as follows:

Johnuniq: fix convert

2018-06-19T09:03:43Z

fix convert

← Previous revision		Revision as of 09:03, 19 June 2018
Line 8:		Line 8:
	The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)		The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)

	Specification 5C3 of the [[American Petroleum Institute]] standardizes 14 casing sizes from {{convert\|4.5\|in\|cm\|2}} to {{convert\|20\|in\|cm\|2}} outside diameter ("OD").<ref>''Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe used as Casing or Tubing; and Performance Properties Tables for Casing and Tubing: 7th Edition, 2008'', American Petroleum Institute, 1220 L Street NW, Washington DC 20005-4070 USA</ref> This and related API documents also promulgate standards for the threaded end finish, the wall thickness (several are available in each size to satisfy various design parameters, and in fact are indirectly specified by standardized nominal weights per linear foot; thicker pipe obviously being heavier), and the strength and certain chemical characteristics of the steel material. Several material strengths—termed "Grades" and ranging from {{convert\|40000\|psi\|MPa\|0}} to {{convert\|150000\|psi\|MPa\|0}} minimum yield strength—are available for most combinations of OD and wall thickness to meet various design needs. Finally, the API publications provide performance minimums for longitudinal strength ("joint strength") as well as resistance to internal (bursting) and external (collapsing) pressure differentials.		Specification 5C3 of the [[American Petroleum Institute]] standardizes 14 casing sizes from {{convert\|4.5\|in\|cm\|2}} to {{convert\|20\|in\|cm\|2}} outside diameter ("OD").<ref>''Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe used as Casing or Tubing; and Performance Properties Tables for Casing and Tubing: 7th Edition, 2008'', American Petroleum Institute, 1220 L Street NW, Washington DC 20005-4070 USA</ref> This and related API documents also promulgate standards for the threaded end finish, the wall thickness (several are available in each size to satisfy various design parameters, and in fact are indirectly specified by standardized nominal weights per linear foot; thicker pipe obviously being heavier), and the strength and certain chemical characteristics of the steel material. Several material strengths—termed "Grades" and ranging from {{convert\|40000\|psi\|MPa\|0}} to {{convert\|150000\|psi\|MPa\|0}} minimum yield strength—are available for most combinations of OD and wall thickness to meet various design needs. Finally, the API publications provide performance minimums for longitudinal strength ("joint strength") as well as resistance to internal (bursting) and external (collapsing) pressure differentials.

	A typical piece of casing might be described as 9-5/8" 53.5# P-110 LT&C Rg 3: specifying OD, weight per foot (53.5 lbm/ft thus 0.545-inch wall thickness and 8.535-inch inside diameter), steel strength (110,000 psi yield strength), end finish ("Long Threaded and Coupled"), and approximate length ("Range 3" usually runs between 40 and 42 feet).		A typical piece of casing might be described as 9-5/8" 53.5# P-110 LT&C Rg 3: specifying OD, weight per foot (53.5 lbm/ft thus 0.545-inch wall thickness and 8.535-inch inside diameter), steel strength (110,000 psi yield strength), end finish ("Long Threaded and Coupled"), and approximate length ("Range 3" usually runs between 40 and 42 feet).

⚫	Casing is run to protect or isolate formations adjacent to the wellbore. It is generally not possible to drill a well through all of the formations from surface (or the seabed) to the target depth in one hole-size section. For example, fresh-water-bearing zones (usually found only near the surface) must be protected soon after being penetrated. The well is therefore drilled in sections, with each section of the well being sealed off by lining the inside of the borehole with steel pipe, known as casing, and filling the annular space (or at least the lower portion) between this casing string and the borehole wall with cement. Then drilling commences on the subsequent hole section, necessarily with a smaller bit diameter that will pass through the newly installed casing.

		⚫	Casing is run to protect or isolate formations adjacent to the wellbore. It is generally not possible to drill a well through all of the formations from surface (or the seabed) to the target depth in one hole-size section. For example, fresh-water-bearing zones (usually found only near the surface) must be protected soon after being penetrated. The well is therefore drilled in sections, with each section of the well being sealed off by lining the inside of the borehole with steel pipe, known as casing, and filling the annular space (or at least the lower portion) between this casing string and the borehole wall with cement. Then drilling commences on the subsequent hole section, necessarily with a smaller bit diameter that will pass through the newly installed casing.
⚫	A ''liner'' is a casing string that does not extend to the surface, being hung instead from a liner hanger set inside of the previous casing string but usually within about {{convert\|300\|ft\|m~~\|\|0~~}} of its bottom. Other than the obvious cost savings, the liner installation allows larger [[drill pipe]] or [[production tubing]] to be used in the upper portions of the well. (A disadvantage is the occasional difficulty in effecting a pressure seal by [[squeeze job\|squeeze cementing]] the casing-liner overlap zone.)

		⚫	A ''liner'' is a casing string that does not extend to the surface, being hung instead from a liner hanger set inside of the previous casing string but usually within about {{convert\|300\|ft\|m}} of its bottom. Other than the obvious cost savings, the liner installation allows larger [[drill pipe]] or [[production tubing]] to be used in the upper portions of the well. (A disadvantage is the occasional difficulty in effecting a pressure seal by [[squeeze job\|squeeze cementing]] the casing-liner overlap zone.)

	Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. Great care must therefore be taken when designing an economic casing programme that will meet the requirements of the well.		Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. Great care must therefore be taken when designing an economic casing programme that will meet the requirements of the well.

Ala.foum: adding reasons for casing

2016-05-28T19:42:46Z

adding reasons for casing

← Previous revision		Revision as of 19:42, 28 May 2016
Line 1:		Line 1:
	In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented.		In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented. The purpose of the casing pipe is as follows:

			* prevent the collapse of the borehole
			* prevent formation fluids from entering the borehole in an uncontrolled way (blow out)
			* prevent fluids in the borehole ( such as produced oil or gas, drilling mud etc.) from entering other formations

	==Background==		==Background==

Humorglazer at 22:37, 11 March 2016

2016-03-11T22:37:10Z

← Previous revision		Revision as of 22:37, 11 March 2016
Line 1:		Line 1:
	In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented. The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)		In drilling technology, '''casing string''' is a long section of connected oilfield pipe that is lowered into a [[oil well\|wellbore]] and cemented.

			==Background==
			The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male threaded on each end and connected with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)

	Specification 5C3 of the [[American Petroleum Institute]] standardizes 14 casing sizes from {{convert\|4.5\|in\|cm\|2}} to {{convert\|20\|in\|cm\|2}} outside diameter ("OD").<ref>''Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe used as Casing or Tubing; and Performance Properties Tables for Casing and Tubing: 7th Edition, 2008'', American Petroleum Institute, 1220 L Street NW, Washington DC 20005-4070 USA</ref> This and related API documents also promulgate standards for the threaded end finish, the wall thickness (several are available in each size to satisfy various design parameters, and in fact are indirectly specified by standardized nominal weights per linear foot; thicker pipe obviously being heavier), and the strength and certain chemical characteristics of the steel material. Several material strengths—termed "Grades" and ranging from {{convert\|40000\|psi\|MPa\|0}} to {{convert\|150000\|psi\|MPa\|0}} minimum yield strength—are available for most combinations of OD and wall thickness to meet various design needs. Finally, the API publications provide performance minimums for longitudinal strength ("joint strength") as well as resistance to internal (bursting) and external (collapsing) pressure differentials.		Specification 5C3 of the [[American Petroleum Institute]] standardizes 14 casing sizes from {{convert\|4.5\|in\|cm\|2}} to {{convert\|20\|in\|cm\|2}} outside diameter ("OD").<ref>''Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe used as Casing or Tubing; and Performance Properties Tables for Casing and Tubing: 7th Edition, 2008'', American Petroleum Institute, 1220 L Street NW, Washington DC 20005-4070 USA</ref> This and related API documents also promulgate standards for the threaded end finish, the wall thickness (several are available in each size to satisfy various design parameters, and in fact are indirectly specified by standardized nominal weights per linear foot; thicker pipe obviously being heavier), and the strength and certain chemical characteristics of the steel material. Several material strengths—termed "Grades" and ranging from {{convert\|40000\|psi\|MPa\|0}} to {{convert\|150000\|psi\|MPa\|0}} minimum yield strength—are available for most combinations of OD and wall thickness to meet various design needs. Finally, the API publications provide performance minimums for longitudinal strength ("joint strength") as well as resistance to internal (bursting) and external (collapsing) pressure differentials.

← Previous revision		Revision as of 06:02, 8 June 2025
Line 1:		Line 1:
	{{Technical\|date=November 2020}}		{{Technical\|date=November 2020}}
			[[File:Casing & Temporary Home.JPG\|thumb\|Oil drilling casing string parts]]

	In drilling technology, '''casing string''' is a long section of connected oilfield pipes that is lowered into an [[oil well\|wellbore]] and cemented in place. The purpose of the casing pipe is to:		In drilling technology, '''casing string''' is a long section of connected oilfield pipes that is lowered into an [[oil well\|wellbore]] and cemented in place. The purpose of the casing pipe is to:

← Previous revision		Revision as of 18:01, 3 April 2025
Line 1:		Line 1:
	{{Technical\|date=November 2020}}		{{Technical\|date=November 2020}}

	In drilling technology, '''casing string''' is a long section of connected oilfield ~~pipe~~ that is lowered into a [[oil well\|wellbore]] and cemented. The purpose of the casing pipe is ~~as follows~~:		In drilling technology, '''casing string''' is a long section of connected oilfield pipes that is lowered into an [[oil well\|wellbore]] and cemented in place. The purpose of the casing pipe is to:

	* ~~prevent~~ the ~~collapse~~ of ~~the borehole~~		* Prevent the borehole from collapsing.
	* ~~prevent~~ formation fluids from entering the borehole in an uncontrolled way (blow out)		* Prevent formation fluids from entering the borehole in an uncontrolled way (blow out).
	* ~~prevent~~ fluids in the borehole ( such as produced oil or gas, drilling mud etc.) from entering other formations		* Prevent fluids in the borehole (such as produced oil or gas, drilling mud, etc.) from entering other formations.

	==Background==		==Background==
	The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, male ~~threaded~~ on each end ~~and~~ ~~connected~~ with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)		The pipe segments (called "joints") are typically about {{convert\|40\|ft\|m\|0}} in length, with male threads on each end that connect with short lengths of double-female threaded pipe called couplings. (Some specialty casing is manufactured in one piece with a female thread machined directly into one end.)

	Specification 5C3 of the [[American Petroleum Institute]] standardizes 14 casing sizes from {{convert\|4.5\|in\|cm\|2}} to {{convert\|20\|in\|cm\|2}} outside diameter ("OD").<ref>''Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe used as Casing or Tubing; and Performance Properties Tables for Casing and Tubing: 7th Edition, 2008'', American Petroleum Institute, 1220 L Street NW, Washington DC 20005-4070 USA</ref> This and related API documents also ~~promulgate~~ standards for the threaded end finish, the wall thickness (several are available in each size to satisfy various design parameters, and ~~in fact~~ are indirectly specified by standardized nominal weights per linear foot; thicker pipe ~~obviously~~ ~~being~~ heavier), and the strength and certain chemical characteristics of the steel material. Several material strengths—termed "Grades" and ranging from {{convert\|40000\|psi\|MPa\|0}} to {{convert\|150000\|psi\|MPa\|0}} minimum yield strength—are available for most combinations of OD and wall thickness to meet various design needs. Finally, the API publications provide performance minimums for longitudinal strength ("joint strength") as well as resistance to internal (bursting) and external (collapsing) pressure differentials.		Specification 5C3 of the [[American Petroleum Institute]] standardizes 14 casing sizes from {{convert\|4.5\|in\|cm\|2}} to {{convert\|20\|in\|cm\|2}} outside diameter ("OD").<ref>''Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe used as Casing or Tubing; and Performance Properties Tables for Casing and Tubing: 7th Edition, 2008'', American Petroleum Institute, 1220 L Street NW, Washington DC 20005-4070 USA</ref> This and related API documents also set standards for the threaded end finish, the wall thickness (several are available in each size to satisfy various design parameters, and are indirectly specified by standardized nominal weights per linear foot; thicker pipe is obviously heavier), and the strength and certain chemical characteristics of the steel material. Several material strengths—termed "Grades" and ranging from {{convert\|40000\|psi\|MPa\|0}} to {{convert\|150000\|psi\|MPa\|0}} minimum yield strength—are available for most combinations of OD and wall thickness to meet various design needs. Finally, the API publications provide performance minimums for longitudinal strength ("joint strength") as well as resistance to internal (bursting) and external (collapsing) pressure differentials.

	A typical piece of casing might be described as 9-5/8" 53.5# P-110 LT&C Rg 3: specifying OD, weight per foot (53.5 lbm/ft thus 0.545-inch wall thickness and 8.535-inch inside diameter), steel strength (110,000 psi yield strength), end finish ("Long Threaded and Coupled"), and approximate length ("Range 3" usually runs between 40 and 42 feet).		A typical piece of casing might be described as 9-5/8" 53.5# P-110 LT&C Rg 3: specifying OD, weight per foot (53.5 lbm/ft, thus 0.545-inch wall thickness and 8.535-inch inside diameter), steel strength (110,000 psi yield strength), end finish ("Long Threaded and Coupled"), and approximate length ("Range 3" usually runs between 40 and 42 feet).

	Casing is ~~run~~ to protect or isolate formations adjacent to the wellbore. It is generally not possible to drill a well through all of the formations from surface (or the seabed) to the target depth in one hole-size section. For example, fresh-water-bearing zones (usually found only near the surface) must be protected soon after being penetrated. The well is therefore drilled in sections, with each section of the well ~~being~~ sealed off by lining the inside of the borehole with steel pipe~~, known as~~ casing, and filling the annular space (or at least the lower portion) between this casing string and the borehole wall with cement. Then drilling commences on the subsequent hole section, necessarily with a smaller bit diameter that will pass through the newly installed casing.		Casing is used to protect or isolate formations adjacent to the wellbore. It is generally not possible to drill a well through all of the formations from the surface (or the seabed) to the target depth in one hole-size section. For example, fresh-water-bearing zones (usually found only near the surface) must be protected soon after being penetrated. The well is therefore drilled in sections, with each section of the well sealed off by lining the inside of the borehole with steel pipe (casing), and filling the annular space (or at least the lower portion) between this casing string and the borehole wall with cement. Then drilling commences on the subsequent hole section, necessarily with a smaller bit diameter that will pass through the newly installed casing.

	A ''liner'' is a casing string that does not extend to the surface, being hung ~~instead~~ from a liner hanger set inside of the previous casing string ~~but~~ usually within about {{convert\|300\|ft\|m}} of its bottom. ~~Other than~~ the ~~obvious~~ cost savings, the liner installation allows larger [[drill pipe]] or [[production tubing]] to be used in the upper portions of the well. (A disadvantage is the occasional difficulty in ~~effecting~~ a pressure seal by [[squeeze job\|squeeze cementing]] the casing-liner overlap zone.)		A ''liner'' is a casing string that does not extend to the surface, instead being hung from a liner hanger set inside the previous casing string, usually within about {{convert\|300\|ft\|m}} of its bottom. Besides the cost savings, the liner installation allows larger [[drill pipe]] or [[production tubing]] to be used in the upper portions of the well. (A disadvantage is the occasional difficulty in creating a pressure seal by [[squeeze job\|squeeze cementing]] the casing-liner overlap zone.)

	Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. ~~Great~~ care must ~~therefore~~ be taken when designing an economic casing ~~programme~~ that ~~will meet~~ the requirements of the well.		Depending on the conditions encountered (e.g., zones of differing formation pressure gradients), three or four casing strings may be required to reach the target depth. The cost of the casing can constitute 20-30% of the total cost of the well{{Citation needed\|date=May 2009}}, and failure can be catastrophic. Therefore, great care must be taken when designing an economic casing program that meets the requirements of the well.

	==References==		==References==