Multi-stage cementing tool
AssigneeHalliburton Energy Services, Inc.
InventorsFrank Vinicio Acosta, Lonnie Carl Helms
Life of this patent
Estimating the term…
Abstract
A cementing tool has an outer housing defining a central flow passage and a plurality of housing flow ports through a wall thereof. An opening sleeve has first and second opening sleeve faces exposed to housing pressure. The first opening sleeve face has a greater surface area than the second opening sleeve face. The pressure differential created is such that the sleeve will move from a first position to a second position in which flow through the plurality of housing flow ports is permitted. The cementing tool has an opening seat defined on the opening sleeve. The opening sleeve may also be moved from the first to the second position as a result of the engagement of the opening plug with the opening seat and an application of pressure thereabove.
Claims20
A cementing tool comprising:
- an outer housing defining a central flow passage and a plurality of housing flow ports through a wall thereof;
- an opening sleeve having a first opening sleeve face and a second opening sleeve face exposed to pressure in the outer housing, the first opening sleeve face having a greater surface area than the second opening sleeve face so that the pressure in the outer housing creates a pressure differential between the first opening sleeve face and the second opening sleeve face sufficient to move the opening sleeve from a first position covering the plurality of housing flow ports to a second position in which flow through the plurality of housing flow ports is permitted;
- and
- an opening seat defined on the opening sleeve configured to receive an opening plug displaced into the outer housing, the opening sleeve also being movable from the first to the second position as a result of the opening plug engaging the opening seat and an application of pressure above the opening seat in the outer housing.
A cementing tool comprising:
- an outer housing connectable in a tubing string, the outer housing defining a central flow passage and having a plurality of housing flow ports through a wall thereof;
- an opening sleeve movable in the outer housing from a first position in which flow through the housing flow ports is blocked to a second position in the outer housing in which flow from the central flow passage is permitted through the housing flow ports, the opening sleeve movable as a result either of differential pressure acting on the opening sleeve or an application of pressure in the outer housing to an opening plug that engages an opening seat on the opening sleeve;
- and
- the opening sleeve being movable from the second to a third position in the outer housing in which flow through the housing flow ports from the central flow passage is prevented.
A cementing tool comprising:
- an outer housing defining a central flow passage therethrough and a plurality of housing flow ports in a wall thereof;
- an opening sleeve detachably connected in the outer housing, the opening sleeve having first and second sleeve faces defined thereon open to tubular pressure and movable from a first position in which flow from the central flow passage through the housing flow ports is prevented to a second position in which flow from the central flow passage through the housing flow ports is permitted, the first sleeve face having a greater surface area than the second sleeve face such that the tubular pressure creates a differential pressure acting on the opening sleeve;
- and
- an opening seat defined in the opening sleeve configured to receive an opening plug such that tubular pressure applied above the opening plug will move the opening sleeve from the first to the second position in the event that the differential pressure fails to move the opening sleeve from the first to the second position.
Dependencies are inferred from the claim text.