초록 ▼

In one aspect of the present invention, a downhole assembly has a downhole tool string component with a bore adapted to accommodate drilling mud having a central passage and at least one periphery passage. At least two movable segments are peripherally positioned around a bore wall adapted to const

In one aspect of the present invention, a downhole assembly has a downhole tool string component with a bore adapted to accommodate drilling mud having a central passage and at least one periphery passage. At least two movable segments are peripherally positioned around a bore wall adapted to constrict a diameter of the central passage and are adapted to divert drilling mud into the at least one periphery passage. At least one opening mechanism is adapted to move a portion of the at least two movable segments toward the bore wall.

대표청구항 ▼

What is claimed is: 1. A downhole assembly, comprising: a downhole tool string component comprising a bore adapted to accommodate drilling mud comprising a central passage and at least one periphery passage; at least two movable segments peripherally positioned around a bore wall adapted to constri

What is claimed is: 1. A downhole assembly, comprising: a downhole tool string component comprising a bore adapted to accommodate drilling mud comprising a central passage and at least one periphery passage; at least two movable segments peripherally positioned around a bore wall adapted to constrict a diameter of the central passage adapted to divert drilling mud into the at least one periphery passage; and at least one opening mechanism adapted to move a portion of the at least two movable segments toward the bore wall; wherein a turbine body disposed within the bore and the at least two movable segments form a barrier separating the central passage and the at least one periphery passage. 2. The downhole assembly of claim 1, wherein the at least one periphery passage directs drilling mud to a turbine. 3. The downhole assembly of claim 2, wherein the turbine is in communication with an electrical generator. 4. The downhole assembly of claim 1, wherein the at least one periphery passage directs drilling mud to a downhole hammer, a downhole steering tool, sensors, or combinations thereof. 5. The downhole assembly of claim 1, wherein the at least one opening mechanism comprises a motor, a spring, a pin, a hydraulic actuator, or combinations thereof. 6. The downhole assembly of claim 1, wherein the at least two movable segments are interlocked. 7. The downhole assembly of claim 1, wherein springs connect the at least two movable segments together. 8. The downhole assembly of claim 7, wherein the springs are adapted to move the at least two movable segments closer to each other. 9. The downhole assembly of claim 1, wherein the downhole assembly is in communication with a telemetry system. 10. The downhole assembly of claim 1, wherein the at least two movable segments are foils. 11. The downhole assembly of claim 1, wherein the at least two movable segments comprise a forward tapered face. 12. The downhole assembly of claim 1, wherein the at least two movable segments comprise a rearward tapered face. 13. The downhole assembly of claim 1, wherein an edge of the at least two movable segments tapers from a bottom end of the at least two movable segments to a top end of the at least two movable segments. 14. The downhole assembly of claim 1, wherein the bore comprises an expanded diameter region. 15. The downhole assembly of claim 1, wherein the at least two movable segments are adapted to pivot on the opening mechanism. 16. The downhole assembly of claim 1, wherein the at least two movable segments are adapted to pivot on a stator disposed within the bore. 17. The downhole assembly of claim 1, wherein the at least two movable segments are adapted to pivot on a wall of the at least one periphery passage. 18. The downhole assembly of claim 1, wherein the at least two movable segments close the at least one periphery passage.