The Natural Solution for Lost Circulation Issues
Leaders in the Oil Industry
Walnut shell is used as lost circulation material to efficiently combat typical operational problems associated with drilling mud losses. Our in-house raw material stock guarantees a consistent, high-quality supply without interruption.
We custom-produce and tailor sizing for all oil industry needs
Fits Your Process
We will work with you to supply sample product for research and development
Our walnut shells have no heavy metals and are pesticide-free and asbestos-free
Get a Free Sample Kit
For a free sample kit of our in-stock walnut shell, just submit your info below.Get My Kit
How Walnut Shells Improve Your Formulation
Annually renewable, your walnut shell applications are protected from supply chain bottlenecks
Efficient and Effortless
Walnut shells help remedy lost circulation problems with ease
Superior Product for Cleaning Bits During Drilling
Walnut shells do not significantly change mud properties, making them easier to remove and recycle
Learn the answers to some of the most common questions we receive about using walnut shells for a variety of industries.
We grow and process English walnut shells, which can be used interchangeably with Black walnut shells due to a similar modulus of elasticity.
Yes, we have years of experience shipping globally. Contact us for more information.
All our shells come from local California farms and are grown to meet the highest standard in the country.
Yes, walnut shells work for wellbore strengthening, but it is critical to choose the correct particle size distribution. Contact us and we can help you determine the optimal grade size option for your need.
Unlike pecan shells, walnut shells do not break down into smaller particle sizes, absorb as much liquid, or make drilling fluids foam.
Our In-Stock Size Options for the Oil Industry
Our sizes are based on U.S sieve standards. Millimeter and inch measurements are approximate. Custom sizes are available upon request.
12/200.85 mm – 1.70 mm
0.0331 in – 0.0661 in
14/301.40 mm – 0.66 mm
0.0234 in – 0.0555 in
18/400.425 mm – 1.00 mm
0.0165 in – 0.0394 in
20/400.425 mm – 0.85 mm
0.0165 in – 0.0331 in
35/600.25 mm – 0.50 mm
0.0098 in – 0.0197 in
40/600.25 mm – 0.425 mm
0.0098 in – 0.0165 in
40/1000.15 mm – 0.425 mm
0.0059 in – 0.0165 in