Wellhead Christmas Tree for Oil & Gas
Octal provides API 6A wellhead Christmas tree complied to API 6A with below conditions:
Standards of Oil and Gas Christmas tree: API 6A
Rated working pressure: 2000psi to 20000psi
Rated working temperature: -46°C to 121°C
Working medium: Oil, Gas (& Gas contained H2S, CO2), Mud and Water
Materia class: AA-ff, AA, BB, CC, DD, EE, FF, HH, NL
Temp Range: K, L, N, P, S, T, U, V, X, Y.
Product Specification Level: PSL1-PSL4
Performance requirement level: Pr1, Pr2
Range of Sizes for Wellhead Christmas Tree
Range of Sizes: 2 1/16” to 5 1/8”
Applications of the Wellhead Christmas Tree
For Oil and Gas exploration. Wellhead and Christmas Tree composed by three parts, including casing head, tubing head, oil (gas) tree, used to connect casing string, tubing string and sealing layers between the casing and tubing of the annular space between, so to control the wellhead pressure and wellhead flow, it also could be used for acid fracturing, water injection, testing and other special operations.
Types of Processes for Oil and Gas Wellhead
The Oilfield oil and gas Wellhead, Christmas tree is an assembly of valves, spools and fittings for an oil well, and to design to direct and control formation fluids from the well. It can provide inlet for production tubing strings, including all components above the tubing head adapter. Wellhead Christmas tree assemblies can constitute many different kinds of combinations in order to meet any special requirement. Based on their different functions, Wellhead Christmas tree can be classified into such special Wellhead Christmas tree as oil production (flowing and artificial lift) Wellhead Christmas tree, gas (natural gas and various sour gas) production Wellhead Christmas tree, water injection Christmas trees, thermal recovery Christmas trees, fracturing Wellhead Christmas trees and acidizing Christmas trees. Different pressure ratings serialize Wellhead Christmas trees.
The gas production Wellhead Christmas tree and tubing head are mainly used to produce gas and inject gas. The relative density of natural gas is low and gas column pressure is low, while well head pressure is high and liable to leakage regardless of gas production and gas injection. Sometimes natural gas contains corrosive media such as H2S and CO2. Therefore, the gas production Christmas tree calls for rigid requirements on both its materials and its sealing characteristics. For the sake of safety, two gate valves are used on the tubing and casing respectively. Some gate valves to be used on high pressure and ultra-high pressure gas wells are integrated valves manufactured from high quality forged steel.
API SPEC 6A