Coiled tubing string structure of finned oil-gas well on long horizontal section and horizontal well section

The utility model discloses a coiled tubing string structure of a finned oil-gas well on a long horizontal section and a horizontal well section. Coiled tubing with equal wall thickness is adopted at the lower section and the middle section of a horizontal section; wherein the upper section of the h...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZOU XIANXIONG, PEI CHUZHOU, LI YUANYUAN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The utility model discloses a coiled tubing string structure of a finned oil-gas well on a long horizontal section and a horizontal well section. Coiled tubing with equal wall thickness is adopted at the lower section and the middle section of a horizontal section; wherein the upper section of the horizontal section 500 m below the target entry point adopts a coiled tubing with gradually increased wall thickness from bottom to top, the deflecting section adopts a coiled tubing with equal wall thickness, the upper section of the horizontal section 500 m below the target entry point adopts a coiled tubing with gradually decreased wall thickness from bottom to top, and the wall thicknesses of the lower section and the middle section of the horizontal section are the smallest. According to the utility model, the tripping-in capability of the coiled tubing in a long horizontal section well and a horizontal section upper fin well can be improved, and the problem that the coiled tubing in a horizontal section upper