Well tool system and method for use in a well conduit
AssigneeHalliburton Company
InventorLeo G. Collins
Life of this patent
Estimating the term…
Abstract
A well tool system and a method utilizing said system e.g. pressuring a well conduit to determine whether the conduit has leaks. The system allows a plurality of no go type landing nipples to be used in a conduit without prohibitively restricting the flow therethrough. With the tool of the present system, the landing surface in each nipple is substantially smaller than in prior no go nipples since the landing surface does not support the tool during the well operation. Pressure-actuated, load-bearing keys are expanded into contact with the nipple once the tool is landed which, in turn, bear substantially all of the downward force on the tool during the well operation. The tool can easily be removed by reducing the upstream pressure and lifting the tool upward in the conduit.
Claims23
A well test tool for pressuring a tubular conduit comprising:
- a body;
- a shoulder located upon said body for contacting an opposing and engageable surface of a nipple, the nipple being within a tubular conduit in which the tool is to be positioned, wherein the diameter of said shoulder is larger than the diameter of said nipple surface whereby the passage of the tool past the nipple surface is impeded;
- and
- at least one outwardly extendable, load-bearing key mounted upon said body, said key constructed for engagement with the nipple in the conduit and such that said engagement restricts relative motion between the tool and the conduit only in the direction of said shoulder and wherein said at least one key is constructed so that upon said key's engagement with the nipple surface, additional movement of the tool toward the shoulder is prevented, thereby restricting additional force from being transferred to the nipple surface.
A well conduit system comprising:
- a length of conduit positioned within a well;
- a landing surface within said conduit;
- a well tool adapted to be lowered from the surface onto said landing surface within said conduit;
- said well tool comprising:
- a body having an external landing shoulder adapted to engage said landing surface within said conduit when said tool is in an operable position;
- at least one expandable, load-bearing key carried by said body;
- by said body;
- said key constructed for engagement with the nipple in the conduit whereby said engagement will restrict relative motion between the tool and the conduit only in the direction of said shoulder and wherein said at least one key is constructed so that upon said key's engagement with the nipple surface, additional movement of the tool toward the shoulder is prevented, thereby restricting additional force from being transferred to the nipple surface;
- and
- means for expanding said load-bearing key into engagement with said conduit after said shoulder of said tool is in engagement with said landing surface in said nipple whereby substantially all downward force on the tool will be transferred through said load-bearing key to said conduit.
A method for pressuring a length of conduit in a well comprising:
- providing a landing nipple at the lower end of said length of conduit to be tested, said nipple having a landing surface thereon;
- landing a well tool on said landing surface to block flow through said conduit;
- and
- increasing the pressure in said conduit above said tool to expand at least one load-bearing key carried by said tool into engagement with said nipple whereby substantially all downward force on said tool will be transferred through said at least one load-bearing key to said nipple.
A well tool comprising:
- a body comprising:
- an expander;
- and
- a retainer slidably mounted on said expander and having an external landing shoulder adapted to engage a landing surface within a no-go landing nipple when said tool is lowered into the nipple;
- at least one expandable, load-bearing key carried by said retainer, said key constructed for engagement with a surface in the nipple whereby said engagement will restrict relative motion between the tool and the nipple only in the direction of said shoulder and wherein said at least one key is constructed so that upon said key's engagement with the nipple surface, additional movement of the tool toward the shoulder is prevented, thereby restricting additional force from being transferred to the nipple surface;
- and
- means for expanding said at least one load-bearing key outward from said landing shoulder upon upward movement of said expander in relation to said retainer for engaging said landing surface within the nipple, whereby substantially all downward force on said tool will be transferred through said at least one load-bearing key to said nipple.
Dependencies are inferred from the claim text.