公开(公告)号：US11867003B2

公开(公告)日：2024-01-09

申请号：US17370714

申请日：2021-07-08

Applicant: ConocoPhillips Company

Inventor： Dustin K. Ward ,  Jing H. Chow

IPC: E21B17/20

CPC classification number: E21B17/20 ,  E21B17/203

Abstract: Implementations described and claimed herein provide systems and methods for extending reach in a wellbore in oil well operations. In one implementation, a first coiled tubing string has a first coil interior surface, and a second coiled tubing string is disposed within the first coiled tubing string and has a second coil exterior surface. An annulus is defined by the first coil interior surface and the second coil exterior surface. The annulus is sealed proximal to a top end of the first coiled tubing string via a first seal and sealed proximal to a bottom end of the first coiled tubing string via a second seal. A fluid is sealed within the annulus at a pressure.

公开(公告)号：US20220010632A1

公开(公告)日：2022-01-13

申请号：US17370714

申请日：2021-07-08

Applicant: ConocoPhillips Company

Inventor： Dustin K. Ward ,  Jing H. Chow

IPC: E21B17/20

Abstract: Implementations described and claimed herein provide systems and methods for extending reach in a wellbore in oil well operations. In one implementation, a first coiled tubing string has a first coil interior surface, and a second coiled tubing string is disposed within the first coiled tubing string and has a second coil exterior surface. An annulus is defined by the first coil interior surface and the second coil exterior surface. The annulus is sealed proximal to a top end of the first coiled tubing string via a first seal and sealed proximal to a bottom end of the first coiled tubing string via a second seal. A fluid is sealed within the annulus at a pressure.