초록 ▼

The invention is a downhole valve that includes a body, a flow tube assembly that includes an upper tube member and a lower tube member, and a flapper valve. The flapper valve is pivotally attached to the body and is positioned between the upper tube member and the lower tube member when the flapper

The invention is a downhole valve that includes a body, a flow tube assembly that includes an upper tube member and a lower tube member, and a flapper valve. The flapper valve is pivotally attached to the body and is positioned between the upper tube member and the lower tube member when the flapper valve is in a closed position that blocks fluid flow in an internal bore of the body. The flapper valve is moved from the closed position to an open position in response to an upward movement of the upper tube member and the lower tube member. When the flapper valve pivots to the open position, the lower tube member moves adjacent to and forms a seal with the upper tube member, forming an unobstructed internal bore.

대표청구항 ▼

[ What is claimed is:] [1.]1. A downhole valve comprising:a body;a flow tube assembly positioned within the body, the flow tube assembly further comprising an upper tube member and a lower tube member; anda flapper valve operatively attached to the flow tube assembly and adapted to pivot from a clos

[ What is claimed is:] [1.]1. A downhole valve comprising:a body;a flow tube assembly positioned within the body, the flow tube assembly further comprising an upper tube member and a lower tube member; anda flapper valve operatively attached to the flow tube assembly and adapted to pivot from a closed position wherein the flapper valve is sealingly positioned between the upper and lower tube members, to an open position,wherein the flapper valve is pivoted to the open position and is enclosed in a recess in the body in response to an upward movement of the upper and lower tube members so that the upper and lower tube members move into a cooperative engagement with each other to form a substantially unobstructed internal bore.