SENTRY SUB™ ADVANTAGES

High Strength Magnets

High strength magnets capture and retain ferrous debris that passes through other filter tools; reducing the risk of BHA failure while increasing the life of directional drilling assets.

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>50% Larger Debris Capture Capacity

The capacity to capture far greater debris volume than any other filter sub on the market, ensuring the BHA is protected for the entire hole section.

Heavy-Duty Screen

Robust screen, 2-3 times thicker than standard filter tools.

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Erosion Resistant Screen

Treated screens are designed to withstand high-velocity flow rates.

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Contingency Bypass

Large built-in bypass prevents MWD signal interruptions/loss, maintaining uninterrupted drilling even in extreme debris environments.

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Large TFA

Large flow area assuring minimal pressure loss.

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DRILL

WITH

CONFIDENCE

DEBRIS MANAGEMENT

Gif showing debris in the drilling mud system being filtered out by a filter sub as the inside of the Sentry Subtm fills up with debris.

In today’s complex and high-cost drilling environments, protecting your bottom hole assembly (BHA) from debris is more critical than ever. The Sentry Sub™ from Wellbore Debis Solutions stands apart from basic filter subs as a purpose-built, high-performance downhole filter sub, designed specifically to eliminate debris-related non-productive time (NPT) and extend the life of your critical drilling tools.

Unlike standard filter subs, the Sentry Sub™ is a unique filter tool that has been engineered to address all debris-related issues encountered in modern directional and horizontal drilling operations. Installed above the BHA to protect sensitive components such as MWD, LWD, rotary steerable systems (RSS), drill motors and bit nozzles by capturing harmful ferrous & non-ferrous debris.

DUAL FILTER TECHNOLOGY

At the core of the Sentry Sub’s™ effectiveness is its high-strength, erosion-resistant internal filter screen, which catches non-ferrous debris in the drilling fluid. As an additional line of defence, an array of powerful, high-grade magnets are strategically positioned to capture and retain ferrous materials.

This dual-filter system dramatically reduces the risk of:

  • Unplanned round trips

  • BHA failures

  • Motor/RSS stalling

  • Damage to high-value measurement and steering tools

  • Plugged bit

Together, these features virtually eliminate debris-related NPT, increasing drilling efficiency and reducing operational costs.

THE COST OF DEBRIS DOWNHOLE

Drill bit plugged with debris causing non-productive time
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Efficient drilling relies on a clear, unobstructed flow. When operations run smoothly, equipment remains protected, downtime is minimised, and drilling stays on track—delivering maximum efficiency and performance.

Debris in the mud system

Cuttings, surface debris, and pipe scale can be pumped down the drill string. Without effective filtering, debris can clog critical components, leading to equipment damage, high-cost repairs, and unplanned delays.

Drill bit plugged with debris from the mud system due to inadequate filtering
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When debris blocks or damages the BHA, drilling grinds to a halt. This leads to costly NPT and deviations in the drilling program—ultimately reducing efficiency, increasing costs, and damaging your reputation. Relying on standard filter subs can derail drilling operations. An expensive mistake for a comparably small outlay.

360 of the Sentry Sub, a Downhole Filter sub

The Sentry Sub™ delivers unrivalled defence against debris, using powerful magnets and precision-engineered screens to stop threats before they start. Fewer trips. Maximum efficiency. Stay ahead of the competition, cut costs, protect your BHA, and drill with absolute confidence.

PRIORITISE PERFORMANCE

Built for the Oilfield. Durable. Reliable. Proven.

0% NPT Since 2018

The Sentry Sub™ is constructed from premium-grade materials designed to withstand the toughest downhole environments. Its robust build ensures long-term durability and is guaranteed to last the entire hole section.

Available in a range of sizes — 4¾", 6¾", 8”, 8¼", and 9½" — the Sentry Sub™ is compatible with standard BHA connections, offering flexible placement within any BHA configuration.

Performance That Pays Off

On average, 30% of drilling non-productive time can be attributed to downhole tool failures related to ferrous and non-ferrous debris.

Choosing the Sentry Sub™ means choosing reliability, efficiency, and long-term cost savings. By protecting your BHA and minimizing the need for unplanned trips or tool replacements, the Sentry Sub™ offers a measurable return on investment in both performance and reduced downtime.

Customers are our Priority

Over 98% of our tool requests go out the same day!

Our growth over the last few years reflects our unwavering commitment to supporting oil & gas operations with reliable, high-performance filter subs and speaks volumes about the trust our customers place in our tools.

HOW CAN WE SUPPORT YOUR DRILLING OPERATIONS?

Be proactive.

Not reactive.