What is wellhead assembly?
The wellhead assembly consists mainly of casing head, tubing head, and Christmas tree. A “Christmas tree” is an assembly consisting of valves and fittings and is used for controlling oil- and gas-well fluid and providing outlets and inlets for produced fluid and washing fluid, and so on.
What are the components of a wellhead?
Generally, the wellhead consists of three components: (1) the casing head, (2) the tubing head, and (3) the Christmas tree. The casing head consists of heavy fittings that provide a seal between the casing and the surface.
What is the first component installed on wellhead?
Casing head
State-of-the-art of drilling It provides annular outlets, as well as supporting the BOP while drilling the remaining stages. Casing head is generally the first component to be installed after the casing has been set.
What is the function of 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. While drilling the oil well, surface pressure control is provided by a blowout preventer (BOP).
What is casing valve?
Casing valves, also known as blowout preventers, casing control valves, etc. are a type of valve used to access a well casing. In simple terms, the casing is the “straw” with which the product (whether it be liquid or gas) is “sucked” out of the earth.
What is a tubing hanger used for?
A tubing hanger is a component used in the completion of oil and gas production wells. It is attached to the topmost tubing joint in the wellhead to support the tubing string.
What is swab valve?
On a Christmas tree, a swab valve is the topmost valve providing vertical access to the well for well intervention operations conducted by wireline, slickline, coiled tubing or a snubbing unit.
What is wellhead choke used for?
Wellhead chokes are used to limit production rates for regulations, protect surface equipment from slugging, avoid sand problems due to high drawdown, and control flow rate to avoid water or gas coning.
What is the composition of wellhead assembly?
Wellhead Assembly Composition of Wellhead Assembly Part A: Casing Head The casing head, installed at the bottom of wellhead assembly connecting casings and various wellhead assemblies, is composed of a body, casing hanger and seal assembly.
What is a frac head?
Sentry VRC FRAC heads are among some of the most innovative designs in the industry. They are the result of ongoing continuous improvements in FRAC equipment design and are the culmination of experience from thousands of stages pumped moving innumerable barrels of proppant.
What are the different types of wellhead products?
Sentry’s conventional wellhead product line is available and strategically placed in the U.S. to meet the needs of our customers. Listed on the pages that follow are the casing heads and spools, casing hangers, secondary seals, tubing heads, tubing hangers, tubing head adapters and many other equipment categories.
What are the components of a frac tree?
A frac tree typically consists of upper and lower master valves, flow cross, flowback valves, pump-down valves, swab valve, frac head/goat head, hammer unions, and tree cap. Frac trees generally have larger bores and higher pressure ratings than production trees to accommodate the high flow rates and pressures necessary for hydraulic fracturing.