Ratchet mechanism in a fluid actuated device

• US 8,365,842 B2
• Filed: 10/29/2009
• Issued: 02/05/2013
• Est. Priority Date: 02/24/2009
• Status: Expired due to Fees

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Hall, David R., Dahlgren, Scott, Marshall, Jonathan
• Primary Examiner(s): Thompson, Kenneth L
• Assistant Examiner(s): GITLIN, ELIZABETH C GOTTLIEB
• Application Number:
  US12/608,744
• Publication Number:
  US 20100212884A1
• Time in Patent Office: 1,195 Days
• Field of Search: 166/378, 166/381, 166/237, 175/271, 175/268, 175/267, 175/263, 175/286
• US Class Current: 175/268
• CPC Class Codes: E21B 10/32 with expansible cutting tools
• CPC Class Codes: E21B 23/004 Indexing systems for guiding relative movement between telescoping parts of downhole tools
• CPC Class Codes: E21B 23/0413 using means for blocking fluid flow, e.g. drop balls or darts using balls or the like for actuating downhole valves E21B34/142

Abstract

A tool comprising a fluid path defined by a bore formed within a tubular body includes a guided sleeve and a reciprocating sleeve disposed within the bore. A gearwheel is located on an outer surface of the guided sleeve and at least one pawl located on an inner surface of the reciprocating sleeve. When the reciprocating sleeve translates axially, it rotates in a first direction. As the reciprocating sleeve rotates, the at least one pawl pushes the gearwheel and causes the guided sleeve to rotate in the first direction into a new position.

Claims

1. A tool comprising:

a tubular body having a bore formed therein and an axis;

a guided sleeve disposed within the bore, the guided sleeve adapted to rotate about the axis and having an outer surface;

a reciprocating sleeve disposed within the bore, the reciprocating sleeve adapted to translate axially from a first position to a second position and constrained to rotate in a first direction when translated from the first position to the second position, and having an inner surface;

a seat connected to the reciprocating sleeve, the seat configured to restrict an obstruction element passing through the tool, wherein a restriction of the obstruction element causes a pressure differential across the seat causing the seat to translate axially;

a gearwheel located on the outer surface of the guided sleeve, the gearwheel comprising a plurality of alternating gear teeth and gear troughs and the gear teeth are configured to move the pawl teeth radially; and

at least one pawl located on the inner surface of the reciprocating sleeve, the at least one pawl adapted to push the gearwheel in response to the reciprocating sleeve rotating in the first direction causing the gearwheel to rotate the guided sleeve to a new position and the at least one pawl adapted to move radially in response to the reciprocating sleeve rotating opposite the first direction.

2. The tool of claim 1, wherein the reciprocating sleeve is adapted to return to the first position.

3. The tool of claim 2, wherein the reciprocating sleeve is biased to return to the first position by a biasing element.

4. The tool of claim 1, wherein a rotation of the reciprocating sleeve causes a corresponding rotation of the seat.

5. The tool of claim 1, wherein the seat comprises a collet having a plurality of collet fingers and a plurality of slits between the collet fingers.

6. The tool of claim 5, wherein the plurality of slits are configured to pass a fluid in response to the seat restricting the obstruction element.

7. The tool of claim 6, wherein the plurality of slits are angled causing the reciprocating sleeve to rotate in a first direction in response to fluid passing through the plurality of slits.

8. The tool of claim 1, further comprising at least one pin attached to the tubular body and at least one channel disposed on the reciprocating sleeve, the at least one pin and the at least one channel are configured to cause the reciprocating sleeve to rotate in the first direction as the reciprocating sleeve is translated axially.

9. The tool of claim 1, wherein the tool is part of a downhole tool string.

10. The tool of claim 1, wherein the tool is part of a hydraulic system.

11. The tool of claim 1, wherein the tool is part of a transmission system.