One-trip squeeze pack system
AssigneeHalliburton Energy Service, Inc.
InventorWilliam J. Martin
Life of this patent
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Abstract
A one-trip squeeze pack system has a unique service seal unit design using concentric tubing, with the inner tubing an extension of the traditional wash pipe and is later used as the production tubing. The inner tubing contains a ported sub which can be isolated in various positions within the outer tubing by way of seals located above and below the ported sub. This seal unit is raised and lowered on the production string and isolated at various positions in order to accomplish setting the packer, running a packing job, reversing out packing fluid, and receiving production fluids.
Claims23
An apparatus for use in a wellbore having an annulus, said apparatus comprising:
- an inner tubing string having a lower section and placed within the annulus;
- an outer tubing assembly containing and concentric with the lower section of the inner tubing string;
- a seal between the lower section of the inner tubing string and the outer tubing assembly;
- at least one port on the inner tubing string for communicating fluid between the inner tubing string and the outer tubing assembly;
- at least one port on the outer tubing assembly for communicating fluid between the outer tubing assembly and the wellbore annulus;
- and,
- wherein the inner tubing string can be raised or lowered within the wellbore while the outer tubing assembly remains fixed within the wellbore.
A method for well completion within a well that penetrates a zone of interest, said method comprising the steps of:
- (a) running a packing assembly down the well on production tubing, said packing assembly comprising a packer and a ported sub;
- (b) setting the packer;
- (c) pumping fluid into the formation;
- and,
- (d) allowing the flow of production fluid back up the production tubing.
An apparatus for use in a wellbore having an annulus, said apparatus comprising:
- an inner tubing string having an upper end protruding above the wellbore, a lower end within the annulus, and a lower section within the annulus;
- said lower section of the inner tubing string having a port for communicating fluids out of and into the inner tubing string and having a diversion below said port;
- an outer tubing assembly having an upper end and a lower end and further containing and concentric with the lower section of the inner tubing string;
- said outer tubing assembly further comprising a port between said upper end and lower end for communicating fluid out of and into the outer tubing assembly;
- a seal between the lower section of the inner tubing string and the outer tubing assembly;
- a seal between the outer tubing assembly and the wellbore annulus;
- and,
- wherein the port of the inner tubing assembly is isolated in different positions within the outer tubing assembly and the wellbore annulus as the inner tubing string is raised and lowered in the wellbore.
Dependencies are inferred from the claim text.