Drilling and completion integration device and method using coiled tubing carrying sieve tubes for sidetracking

Abstract

The invention provides a pinnate branch well sidetracking and completion integration device and method using a coiled tubing carrying sieve tubes. The technical scheme relates to such devices as a tubing anchor, a diverter, the coiled tubing, a sieve tube separating device and a jet bit. The method comprises the steps of tripping in a tubing provided with the anchor and the diverter after the casing cementing of a main horizontal well section; tripping in the coiled tubing carrying the sieve tubes from the inside of the tubing after setting the direction and anchoring the tubular column; using abrasive jet flow to perform window sidetracking; when the sidetracking reaches the designed well depth of branch well holes, separating the sieve tubes from the separating device and leaving the sieve tubes in the branch well holes through ball throwing and pressure building in the coiled tubing; taking the coiled tubing from the well hole at the same time; performing the window sidetracking and ball throwing separation after adjusting the well depth and the direction of the tubing again. Thus, the drilling and completion integration process using the coiled tubing carrying the sieve tube for sidetracking is completed.

Description

technical field [0001] The invention relates to continuous tubing drilling and multi-branch well technology in the petroleum industry, in particular to a device and method capable of realizing the integration of drilling and completion, which is suitable for heavy oil reservoirs, small block reservoirs, and heterogeneous and strong oil reservoirs with heterogeneous permeability. Reservoirs that can be explored and developed using multilateral well technology, such as reservoirs with multiple groups of natural fractures, and coalbed methane. Background technique [0002] Coiled tubing drilling technology, as a drilling technology developed in the 1990s, is mainly used for sidetracking through tubing windows, micro-hole drilling, underbalanced drilling and deep drilling of old well holes. Coiled tubing drilling has many advantages: such as low drilling cost, convenient moving and installation, no need to connect a single tripping hole, fast operation speed, and pressure drilli...

AI Technical Summary

Problems solved by technology

Drilling and well completion are two relatively independent processes in the construction process of conventional multi-branch drilling. After the completion of drilling, it is usually necessary to perform operations such as well opening and fluid replacement before construction of the well completion string. The construction period is relatively long, and the procedure is relatively long. more complex

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