Horizontal directional drilling (HDD) installations generate large volumes of spent drilling mud, which must be managed properly to avoid unnecessary treatment and disposal (T&D) costs and environmental risks. Contractors and owners often choose to solidify drilling mud on-site with superabsorbent polymers (SAPs) because of the cost savings, ease of use, and environmental benefits that SAPs offer. The following SAP FAQs and dosing recommendations may help you to plan a more efficient and safe HDD operation: