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2. Well control - Wikipedia

   en.wikipedia.org/wiki/Well_control

   Casing depths, well control options, formation fracture pressures and limiting fluid weights may be based on this information. To determine formation strength and integrity, a Leak Off Test (LOT) or a Formation Integrity Test (FIT) may be performed. The FIT is: a method of checking the cement seal between the casing and the formation.

3. MAASP - Wikipedia

   en.wikipedia.org/wiki/MAASP

   In this well, the outside casing of the 'B' annulus is 13 + 3 ⁄ 8 in (340 mm) N80 grade with a weight of 68 lb⋅ft (92 N⋅m) −1. The burst pressure of this casing is 5020 psi. 1.2 sg brine produces a pressure gradient of 0.52 psi.ft −1 (see Well kill for the mathematical basics of hydrostatic heads). Therefore, the column of brine ...

4. Wellhead - Wikipedia

   en.wikipedia.org/wiki/Wellhead

   The primary purpose of a wellhead is to provide the suspension point and pressure seals for the casing strings that run from the bottom of the hole sections to the surface pressure control equipment. [1] While drilling the oil well, surface pressure control is provided by a blowout preventer (BOP).

5. Completion (oil and gas wells) - Wikipedia

   en.wikipedia.org/wiki/Completion_(oil_and_gas_wells)

   The tubing may also have flow control mechanism. Single-well concentric kill string: within the well a small diameter concentric kill string is used to circulate kill fluids when needed. Single-well 2-tubing completion: in this instance 2 tubing strings are inserted down 1 well. They are connected at the lower end by a circulating head.

6. Casing (borehole) - Wikipedia

   en.wikipedia.org/wiki/Casing_(borehole)

   Casing Diameters of a Borehole Casing Diagram premium gas tight connections on a casing string. Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream.

7. Drill stem test - Wikipedia

   en.wikipedia.org/wiki/Drill_stem_test

   Performed after the well is cased, cased hole drill stem testing uses a retrievable production packer that is set above the zone of interest. The well is then flow tested through perforations in the casing. The two types of cased hole testing are pressure operated and mechanically operated.

8. Oil well control - Wikipedia

   en.wikipedia.org/wiki/Oil_well_control

   As technology has advanced, more modern drillers have better control of the overall well. Oil well control is the management of the dangerous effects caused by the unexpected release of formation fluid, such as natural gas and/or crude oil, upon surface equipment of oil or gas drilling rigs and escaping into the atmosphere.

9. Snubbing - Wikipedia

   en.wikipedia.org/wiki/Snubbing

   Due to the large rigup, it is only used for the most demanding of operations when lighter intervention techniques do not offer the strength and durability. [1] The first snubbing unit was primarily designed to work in well control situations to "snub" drill pipe and or casing into, or out of, a well bore when conventional well killing methods ...