What does a casing head do?
The casing head performs the following functions: Provides a base to attach the surface casing string. Supports or transfers the weight of the equipment during drilling and well servicing operations. Provides a platform for testing the blowout preventers (BOP) while drilling.
What is wellhead in oil and gas?
A wellhead is an equipment installed at the surface of a completed oil or a gas well that provides a structural and pressure containing interface for the drilling and production equipment.
What is casing head gas?
Casinghead gas is gas that collects in the annular space between the casing and tubing in an oil well. Usually beneficial, casinghead gas forces the produced oil up the tubing.
What is wellhead casing?
In oil drilling, a casing head is a simple metal flange welded or screwed onto the top of the conductor pipe (also known as drive-pipe) or the casing and forms part of the wellhead system for the well.
What does a wellhead engineer do?
Install, remove, repair, assemble, disassemble and function test wellhead equipment, solved technical problems of various valves, pneumatic valves “Actuators”, choke boxes, choke beans, flow line valves, greasing, christmas tree assemble, preventive & corrective maintenance services successfully.
What is PAD in fracking?
1. n. [Drilling, Production] A temporary drilling site, usually constructed of local materials such as gravel, shell, or even wood.
What is casing head pressure?
Definition of ‘casing head pressure’ Bottom hole pressure is the natural gas pressure at the bottom of an oil well, as opposed to casing head pressure, which is the pressure at the surface of the well. The casing head pressure is the pressure on the casing, which is measured at the wellhead.
What is casing head petroleum spirit?
casinghead petroleum spirit means any liquid hydrocarbons obtained from natural gas by separation or by any chemical or physical process.
How is a wellhead installed?
The wellhead is slipped on to the surface or conductor casing, and the base plate landed on the first casing string run (normally drive-pipe). The welding procedure is then performed which typically includes preheating, welding of the head to casing, postheating, and cooling.
What is wellhead maintenance?
Expro’s wellhead maintenance services form a key part of Expro’s well integrity capability – from new HPHT developments, through to the mature brownfield site. This includes the routine inspection, repair and maintenance of surface wellheads, as well as the provision of pressure testing services.
How deep is oil in the ground?
Impressive numbers Oil and gas wells can range in depth from a few hundred feet to more than 20,000 feet. In some parts of the world, wells go as deep as 30,000 feet, Zdarko says. Ranging from 1,000 to 2,500 feet deep, Aera’s San Joaquin Valley wells are considered shallow.
How tall is a fracking rig?
3) Drilling the Well The average height of a normal drilling rig is about 125ft, which is equivalent to a 10 or 11 storey building or around two-fifths the size of the clock tower of Big Ben.
What causes casing pressure?
The source of the pressure could be from the producing reservoir, another reservoir up the hole supplying fluid through a poorly cemented intermediate casing string, a shallow, benthic gas source, or a leak across the seal assembly in a well head component such as a casing hanger.
What is the use of a casing head?
Casing head is mainly used to fix the wellhead of the drilling well, connect the downhole casing string, and reliably seal and control the annular space between the casings. It is an important component of oil &gas wellhead equipment in the oilfield.
Where is the casing head on a wellhead?
Usually, the casing head lies at the bottom of the wellhead and X-mas tree equipment. It supports the drilling wellhead, the casing head spool, the X-mas tree and completion equipment. The casing head is used to connect the casing string and packing off the next casing string. The connecting type includes slip-on weld, thread and slip lock.
What are Sanjack casing heads?
Sanjack casing heads strictly conform to the API 6A standard, and are among the most reliable oilfield casing heads. Usually, the casing head lies at the bottom of the wellhead and X-mas tree equipment. It supports the drilling wellhead, the casing head spool, the X-mas tree and completion equipment.