Oilfield material delivery mechanism

摘要

A mechanism for pressurized delivery of material into a well without exposure to a high pressure pump. The mechanism may include material delivery equipment that is coupled to the high pressure pump or other pressure inducing equipment through a material carrier that intersects a fluid line from the pump. The material carrier may include chambers that are reciprocated or rotated between positions that are isolated from the fluid line and in communication with the fluid line. While isolated from the fluid line, the chambers may be filled with oilfield material which may then be delivered to the fluid line when positioned in communication therewith. In this manner, a supply of the oilfield material may be retained in a substantially isolated state relative to the pump and components thereof which may be susceptible to damage from exposure to the oilfield material.

主权项

1. An oilfield material supply assembly comprising:
a carrier housing coupled to a fluid line for carrying a fluid flow from a pressure inducing mechanism; a material carrier disposed within said carrier housing and having a chamber to accommodate an oilfield material; a material reservoir for housing a supply of the oilfield material, said material reservoir coupled to said carrier housing, the chamber for shifting from a first position to a second position, the first position substantially isolated from the fluid flow and aligned with said material reservoir for allowing the chamber to receive oilfield material therefrom, the second position exposed to the fluid flow; and a retractable sleeve disposed within said carrier housing, wherein said retractable sleeve is capable of moving from a first position that occludes the reservoir to a second position that opens the reservoir and allows the chamber to receive oilfield material; wherein the material carrier further comprises at least one carrier seal adapted for shifting from the first position to the second position, and the at least one carrier seal adapted for substantially isolating the chamber from the fluid flow pressure in the first position.