Pipe & Fittings

Meilong is a supplier of welded and redrawn, seamless and redrawn coiled capillary downhole tubing which are made from corrosion-resistant duplex stainless steel 1.4410. We have been specializing in manufacturing coiled tubing used in the oil and gas industry.

1.4410 Coiled Capillary Downhole Tubing for Control Lines
A direct hydraulic control umbilical provides direct hydraulic control of each valve on a subsea christmas tree, through a bundle of tubes from the topsides hydraulic power unit (HPU) to the subsea tree. No electrical power or signal is required. Actuation of valves is by the supply of hydraulic power to the relevant tube. This is accomplished by opening the relevant valve on the manifold located on the topsided HPU. This type of umbilical is limited to subsea production systems with short offsets to the host and few trees.

1.4410 Coiled Capillary Downhole Tubing

Meilong is a supplier of welded and redrawn, seamless and redrawn coiled capillary downhole tubing which are made from corrosion-resistant duplex stainless steel 1.4410. We have been specializing in manufacturing coiled tubing used in the oil and gas industry.

1.4410 Coiled Capillary Downhole Tubing for Control Lines

A direct hydraulic control umbilical provides direct hydraulic control of each valve on a subsea christmas tree, through a bundle of tubes from the topsides hydraulic power unit (HPU) to the subsea tree. No electrical power or signal is required. Actuation of valves is by the supply of hydraulic power to the relevant tube. This is accomplished by opening the relevant valve on the manifold located on the topsided HPU. This type of umbilical is limited to subsea production systems with short offsets to the host and few trees.

Thanks to the experience and expertise gained in the production and inspection, the tubes supplied by Meilong fully meet stringent quality requirements of the oil & gas industries. The tubing deployed in the umbilicals used in aggressive subsea and downhole conditions.

1.4410 Coiled Capillary Downhole Tubing for Chemical Injection

One of the main challenges in the upstream processes of the oil and gas industry is to protect pipeline and process equipment against waxes, scaling and asphalthane deposits. The engineering disciplines involved in flow assurance play an essential part in mapping the requirements that reduce or prevent loss of production due to pipeline or process equipment blockage. Steel tubing from Meilong is applied to umbilicals and chemical injection systems play an effective role in chemical storage and delivery at an optimizing flow assurance.

Our tubing is characterized with integrity and quality to be specially used in subsea conditions in the industries of oil and gas extraction.

Available Alloy Grades for Coiled Capillary Tubing

1.4410 Stainless Steel Capillary Downhole Tubing Features

Close dimensional tolerances

Enhanced mechanical properties

Superior surface finish

High cleanness of inside surface

Controlled ovality, eccentricity

1.4410 Duplex Stainless Steel Tube Norms

ASTM A789 / ASME SA789

ASTM A632 / ASME SA632

EN10216-5

Coiled Capillary Downhole Tubing Process

TIG welded and cold drawn

Seamless and cold drawn

1.4410 Coiled Capillary Downhole Tubing Dimension

Outside Diameter: 1/8’’ – 1/2’’ (3.175 mm – 12.7 mm)

Coiled tubing length: up to 32,808 feet (10,000 m)

Tubing with minimum orbital welds reduces the risk of leakages when connecting tubes, and suitable for delivery for customers need.

Single coiled tubing is available

The tubes are delivered with plastic caps for protection from potential contamination during storage.

Delivery condition

Cold worked

Bright annealed

Annealed and polished

Packing

Coiled tubing is level wound on the spool/reel

metal reels and marking can be specified by the customer

Application

Control line

Chemical injection line

Electrical line

Multi-line flat pack

Hydraulic line

Tubing encapsulated conductor

Intelligent well completions

Capillary tubing

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