pad fluid

English to Spanish Tech/Engineering Mechanics / Mech Engineering Hydraulic fracturing

Hola a todos, el término figura en una patente sobre "aplicaciones de fracturación hidráulica"

"...microenergetic particles are not admixed with the proppant but are instead pumped ahead of the proppant containing portion of the fracturing fluid as in a *pad* fluid"

"...embodiment where the MEPs are introduced into the *prepad* segment of the fracture materials"

Lo que encontré en internet es "Fluid not containing any solid (called the “pad”) is injected first.."
Mi pregunta es si existe un término específico para pad en este contexto, muchas gracias!