| 摘要 |
Coiled tubing optimized for long, horizontal completions is provided. The tubing comprises a body portion; at least two tapered portions, each tapered portion defining distal ends spaced apart from one another; and at least one bias weld portion. In some embodiments, the tapered portions are located between the body portion and the bias weld. The tubing has a weld thickness in the bias weld portion(s), a body thickness in the body portion, and a taper thickness in the tapered portions; generally, the thickness of the bias weld portion is greater than the body portion thickness. The wall thickness transitions from one end of each tapered portion to the other end of the same tapered portion. |
| 主权项 |
1. A coiled tubing, comprising:
a first section comprising a first body portion disposed between at least two first tapered portions, the first tapered portions defining two distal ends spaced apart from one another, wherein each distal end has a wall thickness greater than a wall thickness of the first body portion, and wherein the first body portion, the two first tapered portions, and the two distal ends have substantially the same outer diameter; a second section comprising a second body portion disposed between at least two second tapered portions, the second tapered portions defining two distal ends spaced apart from one another, wherein each distal end has a wall thickness greater than a wall thickness of the second body portion, and wherein the second body portion, the two second tapered portions, and the two distal ends have substantially the same outer diameter; and wherein one distal end of the first section is welded to one distal end of the second section to form spoolable coiled tubing. |
