Invention Grant
- Patent Title: Fluid actuated circulating sub
- Patent Title (中): 流体驱动循环副
-
Application No.: US11811301Application Date: 2007-06-08
-
Publication No.: US07766086B2Publication Date: 2010-08-03
- Inventor: Maximiliano Mondelli , George Krieg , David Hebert , David Robinson
- Applicant: Maximiliano Mondelli , George Krieg , David Hebert , David Robinson
- Applicant Address: US TX Houston
- Assignee: BJ Services Company LLC
- Current Assignee: BJ Services Company LLC
- Current Assignee Address: US TX Houston
- Agency: Howrey LLP
- Main IPC: E21B34/10
- IPC: E21B34/10

Abstract:
A downhole device used to divert fluid flow out of a work string into an annulus. The downhole device is activated by the movement of a plurality of pistons within the downhole device. Fluid flow through a restriction of the downhole device creates an increase in fluid pressure causing the movement of the pistons. The pistons move a flow tube between various locations within the device. In one location, the flow tube prevents fluid flow to the annulus while in another location the flow tube allows fluid flow to be diverted into the annulus. The downhole device may include a locating sleeve having a continuous j-track allowing the flow tube to be selectively retained at the various locations within the downhole device. Fluid flow through the downhole is used to cycle the device between diverting fluid flow to the annulus and forcing fluid flow down the work string.
Public/Granted literature
- US20080302571A1 Fluid actuated circulating sub Public/Granted day:2008-12-11
Information query