Variable OD coiled tubing strings
AssigneeCtes, L.C.
InventorKenneth R. Newman
Life of this patent
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Abstract
Coiled tubing or a portion thereof having a first part spaced-apart from a second part, the coiled tubing having a first outer diamter at the first part and a second outer diameter at the second part, the first outer diameter different from the second outer diameter, and outer diameter of the coiled tubing continuously diminishing or increasing from the first part to the second part, in one particular aspect thus varying over its entire length; and methods for using and methods and apparatuses for making such coiled tubing.
Claims12
A method for pulling a coiled tubing string from a wellbore extending from earth surface down into the earth, the method comprising
- pulling the coiled tubing from the wellbore, the coiled tubing comprising
- the coiled tubing having a first outer diamter at the first end and a second outer diameter at the second end,
- the first outer diameter larger than the second outer diameter, and
- outer diameter of the coiled tubing continuously diminishing from the first end to the second end.
A method for snubbing coiled tubing into a wellbore extending from earth surface down into the earth, the method comprising
- introducing coiled tubing into the wellbore, the coiled tubing comprising the coiled tubing having a first outer diamter at the first end and a second outer diameter at the second end, the first outer diameter larger than the second outer diameter, and outer diameter of the coiled tubing continuously diminishing from the first end to the second end, and
- the method including introducing the second end first into the wellbore.
A method for producing a fluid from a wellbore, the wellbore extending down from an earth surface into the earth, the fluid containing gas and liquid, the method comprising
- installing coiled tubing in the wellbore, the coiled tubing comprising the coiled tubing having a first outer diamter at the first end and a second outer diameter at the second end, the first outer diameter larger than the second outer diameter, and outer diameter of the coiled tubing continuously diminishing from the first end to the second end, and
- the second end below the first end in the wellbore.
A method for producing a fluid from a wellbore, the wellbore extending down from an earth surface into the earth, the fluid containing gas and liquid, the method comprising
- installing coiled tubing in the wellbore, the coiled tubing comprising the coiled tubing having a first outer diamter at the first end and a second outer diameter at the second end, the first outer diameter larger than the second outer diameter, and outer diameter of the coiled tubing continuously increasing from the first end to the second end, and
- the second end below the first end in the wellbore.
A method for introducing fracturing treatment material into an earth formation, the method comprising
- pumping a fluid with fracturing treatment material down into a tubular string extending down from an earth surface into an earth formation, the string having a first portion with a first outer diameter at the earth surface and a second portion with a second outer diameter at a portion of the string within the earth formation, the string having a continuously varying outer diameter from the first portion to the second portion, the first outer diameter larger than the second outer diameter, and
- reducing velocity of the fluid with fracturing treatment material by flowing it from the first portion of the string to the second portion of the string.
A method for pushing a coiled tubing string into a wellbore extending from earth surface down into the earth, the method comprising
- pushing the coiled tubing into the wellbore, the coiled tubing comprising
- the coiled tubing having a first outer diamter at the first end and a second outer diameter at the second end,
- the first outer diameter larger than the second outer diameter, and
- outer diameter of the coiled tubing continuously diminishing from the first end to the second end.
A method for pushing a coiled tubing string into a pipeline, the method comprising
- pushing the coiled tubing into the pipeline, the coiled tubing comprising
- the coiled tubing having a first outer diamter at the first end and a second outer diameter at the second end,
- the first outer diameter larger than the second outer diameter, and
- outer diameter of the coiled tubing continuously diminishing from the first end to the second end.
A method for pulling a coiled tubing string from a pipeline, the method comprising
- pulling the coiled tubing from the pipeline, the coiled tubing comprising
- the coiled tubing having a first outer diamter at the first end and a second outer diameter at the second end,
- the first outer diameter larger than the second outer diameter, and
- outer diameter of the coiled tubing continuously diminishing from the first end to the second end.
Dependencies are inferred from the claim text.