Tungsten Filled Wireline Stems

Tungsten Filled Wireline Stems are made of high density tungsten alloy material. Solving Traditional Sinker Bar Issues with Tungsten-Filled Wireline Stems gets more and more popular. For gas wells, oil wells, water injection wells, and wells with high wellhead pressure or high fluid viscosity, it is necessary to use a specific weighted bar to facilitate the downhole instrument to enter the well for downhole testing.

In the mining industry, mercury-weighted bars or lead-weighted bars are commonly used. The disadvantage of this setup is that the specific gravity of mercury or lead is not high enough. In wells with higher pressure or thicker oil, the weighted bar for downhole testing instruments must be very long. This requires more extended blowout preventer pipes and a higher derrick, increasing construction difficulty and safety risks. Another drawback is that the center of mercury or lead-weighted bars cannot accommodate the transmission cable for transmitting test signals, and it can only be placed below the test instrument. In this way, the test instrument with a 100-kilogram weighted bar hanging below it will be affected by the tension it receives, affecting its regular operation.

High Density and Compact Size: Tungsten alloy has an extremely high density, with a minimum density of 17.50 g/cc. This is much higher than stainless steel (7.80), lead (11.40), and even tungsten steel (14.50). This means that tungsten-filled cable drill rods can provide greater weight in the same volume, making the drilling tools more compact.

Excellent Mechanical Properties: Tungsten alloy is very hard and wear-resistant. It can last a long time in harsh oil drilling conditions without frequent replacement. It also has good weldability and machinability, making it easy to process threads or other connection methods.

Various Specifications and Customization: The product comes in different diameters and lengths. Custom sizes and connection methods are also available. For example, the outer diameter ranges from 1.25 inches to 2.5 inches, and lengths include options like 2 feet, 3 feet, and 5 feet.

Safety and Reliability: The internal tungsten alloy inserts are securely fixed to prevent movement. Some components also undergo QPQ (nitriding + oxidation) treatment, improving surface hardness and corrosion resistance.

Oil and Gas Industry:
In gas wells, oil wells, and water injection wells-especially those with high wellhead pressure or high fluid viscosity-tungsten-filled cable drill rods help downhole tools enter the well for testing. They provide enough weight to overcome resistance from wellhead pressure and fluid viscosity, ensuring smooth tool deployment.

Flow Surveys:
For flow surveys requiring extra weight to counter upward forces in flowing wells, tungsten-filled cable drill rods are an ideal choice. They help the tool string move smoothly in the well, enabling necessary measurements and tests.

Reducing Tool String Length:
When additional weight is needed without increasing the overall length of the tool string, tungsten-filled cable drill rods can replace traditional steel drill pipes. Due to their higher weight per unit length, they provide the required weight while keeping the tool string compact.

FAQ

Are you a factory or manufacturer?

A: Yes, we are a factory but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.

What is the delivery method?

A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.

Why is your product so cost-effective?

A: We cut out the middlemen in the end-to-end manufacturing process and we obtain raw material directly from its source.

Do you do spot quality inspection or full inspection?

A: 100% full inspection for sure. All unqualified products are discarded.

How do you ensure your lead time?

A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.

What is the MOQ of Tungsten Filled Wireline Stems?

A: Depends on quantity, generally, no MOQ limit.

How to pay for it?

A: A bank transfer (T/T) will be acceptable.

What is the delivery time?

A: around 7-20 days which depends on the quantity and production.

What is kind of the package?

A: Generally, we use a carton case or plywood case with protective material inside to ensure the save of cargo

What is the lead time?

A: from order placed to cargo receiving will take around 10-25 days.

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