A water riser re-entry oblique device

Abstract

The invention relates to the technical field of underwater detection devices, and specifically discloses a re-entry inclined device for a water-resisting conduit, which includes: The inclined plane is straightened through the centralizing unit, and the inclined plane is provided with longitudinal grooves and transverse grooves to guide the water riser and drilling tools; , the casing is provided with a hollow hole, which can meet the requirement of cementing and sealing after the oblique device is released; the anchoring unit is set under the righting unit, which can fix the depth and orientation of the inclined plane; the introduction head is located under the anchoring unit, and the bottom It is a tapered head to ensure that the oblique device can be smoothly lowered into the notch of the casing. The invention realizes the reuse of abandoned well grooves, and effectively solves the problem that the inner casing is not centered. The longitudinal groove and the transverse groove provide the guidance of the water-resisting conduit and the drilling tool, and avoid the risk of wellbore finding and azimuth deviation.

Description

technical field [0001] The invention relates to the technical field of drilling tools, in particular to a riser reentry deflector. Background technique [0002] On offshore oil production platforms, slots are generally used up due to cost and space constraints, but slots are still needed to develop oil reservoirs with proven reserves according to the production plan. Factors that produce abandoned well slots. [0003] At present, the main method of adding slots on offshore platforms is to build external well slots, which is costly and at the same time increases the load of the jacket platform, and some platforms can no longer continue to hang external well slots; secondly, opening windows for water-resisting conduits requires not only recycling the inner casing Complicated processes such as pipe, outer casing, sleeve milling and forging milling also increase the risk of subsequent window passing and orientation deviation. [0004] Therefore, there is an urgent need for a r...

AI Technical Summary

Problems solved by technology

[0002] On offshore oil production platforms, slots are generally used up due to cost and space constraints, but slots are still needed to develop oil reservoirs with proven reserves according to the production plan. Factors that create abandoned well slots

[0003] At present, the main method of adding slots on offshore platforms is to build external well slots, which is costly and at the same time increases the load of the jacket platform, and some platforms can no longer continue to hang external well slots; secondly, opening windows for water-resisting conduits requires not only recycling the inner casing Complicated processes such as pipe, outer casing, sleeve milling and forging milling also increase the risk of subsequent window passing and orientation deviation

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