ISO15156 Nickel Alloy Tubing Annealed Stainless Steel Capillary Tubing ASTM B704

Product Specification

1 / 4 '' OD x 0.049 '' WT Geothermal Tubing Capillary Tubing for Chemical Injection Line

Meilong Tube specially manufactures seamless and redrawn, welded and redrawn coiled tubing which are made from corrosion-resistant austenitic, duplex, super duplex stainless steels and nickel alloy grades. The tubing is used as hydraulic control lines and chemical injection lines specially serving oil and gas, geothermal industry.

Application of Geothermal Tubing Injection Line

Hot water flooding is a thermal recovery technique in which hot water is injected into a reservoir to increase heavy to medium crude oil production. The heat from hot water reduces the viscosity and density of crude oil allowing it to flow easier to the production well. This process, also known as hot water injection increases oil recovery factor and maintains the well production rate for a longer period.

The rise of global development in the last century has seen a rapid increase in the demand for oil. Heavy oils have attracted the world at large due to its abundant reserves and increased development in the past decades. Various techniques such as cold and thermal production have been applied to recover heavy reservoir oils. Cold production methods include chemical flooding (polymer flooding, surfactant flooding, gas flooding etc.), natural depletion and water flooding. Thermal production includes injecting thermal fluid into reservoir, such as cyclic steam stimulation, steam flooding, and steam assisted gravity drainage or generating heat in the reservoir. The same technology and method is used for injecting hot water into geothermal wells for realizing material exchange.

Typical size of Geothermal Tubing Chemical Injection Line

Outside diameter of control lines is mainly 3/8’’ (9.53mm), 1/2'' (12.7mm0).

Wall thicknesses: 0.035’’ (0.89mm), 0.049’’ (1.24mm), 0.065’’ (1.65mm), 0.083'' (2.11mm)

Control line tubing is available in lengths from 400 feet (122 meters) to 32,808 feet (10,000 meters). No orbitally butt welds.

Other specifications (1/8’’ to 3/4’’) are available on request.

Importance of Chemical Injection Line

Each one tubing coil is a completely continuous length without orbital welds.

Each one tubing coil is hydrostatic tested at minimum 11,600 psi.

The test can be witnessed on site by the third party inspectors (SGS, BV, DNV).

Other tests are eddy current test, chemicals, flattening, flaring, tensile, yield, elongation, hardness for the material quality.

The Role of Chemical Injection Line

In the oil and gas industry we inject chemicals in order

to protect the infrastructure

to optimize processes

to assure flow

and to improve productivity

Alloys for Geothermal Tubing Injection Lines

Injection Line Tubing Features

Close dimensional tolerances

Considerably enhanced mechanical properties

Superior surface finish

High cleanness of inside surface

Controlled ovality, eccentricity

Tubing Process and Packing

Seamless- pierced, redrawn, annealed (multi-pass circulation process)

Welded- longitudinally welded, redrawn, annealed (multi-pass circulation process)

Packing- Tubing is level wound coiled on the metal / wooden drums or spools.

All drums or spools are packed in wooden crates for easy logistic operation.

Inconel 625 for Geothermal Tubing Chemical Injection Line

Inconel 625 is a material with excellent resistance to pitting, crevice and corrosion cracking. Highly resistant in a wide range of organic and mineral acids. Good high temperature strength.

Characteristics of Inconel 625

Excellent mechanical properties at both extremely low and extremely high temperatures.

Outstanding resistance to pitting, crevice corrosion and intercrystalline corrosion.

Almost complete freedom from chloride induced stress corrosion cracking.

High resistance to oxidation at elevated temperatures up to 1050C.

Good resistance to acids, such as nitric, phosphoric, sulfuric and hydrochloric, as well as to alkalis makes possible the construction of thin structural parts of high heat transfer.

Application

Components where exposure to sea water and high mechanical stresses are required.

Oil and gas production where hydrogen sulfide and elementary sulfur exist at temperature in excess of 150C.

Components exposed to flue gas or in flue gas desulfurization plants.

Flare stacks on offshore oil platforms.

Hydrocarbon processing from tar-sand and oil-shale recovery projects.

Injection Line Geothermal Tubing Weight per Meter (kg)

Inconel 625 (UNS N06625)

Geothermal Tubing Injection Line Properties

Seam-welded & floating internal plug redrawn tubing. Supplied in the annealed condition

Continuous length without orbital joint welds

Theoretical burst pressure based on minimum wall thickness, and minimum tensile strength

Theoretical collapse pressure based on minimum wall thickness, and minimum yield strength

Pressure rating at 100°F (38°C), neutral and static conditions