The document discusses the process of installing and testing a wellhead flange. It involves leveling the flange, attaching it to the casing via welding or other connections, testing the welds, running casing and setting the hanger, testing the blowout preventers with a wear bushing, and continuing drilling operations while following proper procedures to install subsequent casing, tubing, and the tree assembly. Safety testing is conducted throughout the process.

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Leveling &Cold Cutting
• The flange must be installed so that the top is level.
• Cold Cutting equipment is used
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Welding
• The wellhead flange attaches to the first cemented surface casing string designed to
hold pressure.
• Well flange attachment to the casing may be by welding, forming, threaded
connection or set screws.
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Welding2
C a s i n g H e a d S p o o l

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Weld test
• Test welds to 3,000 psi or 80% of casing collapse.
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TEST PORT

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Casing running and hanger set
• The second string of casing is run and the hanger is landed in
the bowl.
• Lock down screws engaged
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N/U and test BOP
• Make sure the BOP, test plug, and the casing head are
compatible
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N/U and test BOP
• Lower the wear bushing through the blowout preventers and
riser until it lands on the load shoulder of the casing head
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Continue drilling operation8
RIH and set new casing10
SET hanger and lDS11
N/D BOP12
Retrieve wear bushing9

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The casing spool follows13

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N/U BOP and test plug14

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test BOP15

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Install Tubing spool15

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Run Tubing and set hanger16

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Installation of tree assembly17

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DIMENSIONS ARE SUBJECT TO CHANGE ACCORDING TO ACTUAL
FIELD CONDITIONS