A Radial Horizontal Drilling and Sand Control Completion Tool and Method

Abstract

The invention belongs to the technical field of oil and gas field drilling and completion, and in particular relates to a radial horizontal drilling and sand control completion tool and method, wherein the tool is characterized in that it includes a radial horizontal drilling auxiliary string, a radial horizontal drilling tool string and a sand control tool , radial and horizontal drilling auxiliary strings include depth adjustment tools, special tubing assemblies, depth calibration tools, azimuth determination auxiliary tools, axial anchoring tools, azimuth adjustment tools and drilling steering tools, and radial horizontal drilling tool strings Including interconnected logging cables, circulating liquid inlet tools, gravity sealing tools, circumferential anchoring tools, power motors, variable buckle joints, flexible drill pipes and milling bit tools. The invention can establish a 10-20m (hard formation) stable drainage channel between the wellbore and the oil layer, replace the conventional perforation for deep penetration completion, cross the near-well pollution zone, penetrate the oil well invasion zone, and improve water injection wells, Injection rate of gas injection well and treatment well.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field drilling and completion, and in particular relates to a radial horizontal drilling and sand control completion tool and method. Background technique [0002] In the process of drilling and workover, the formation will inevitably be polluted. According to relevant literature reports: the pollution radius is about 0.6-1.5m, and the pressure drop within 10m from the wellbore accounts for more than 60%. rate will drop as a result. [0003] The penetration depth of commonly used perforation methods is relatively short, only 0.4-1m, and the perforation compaction effect is likely to cause secondary damage to the formation, and the permeability around the blasthole is reduced by 70%-80%. Radial hydrojet drilling technology can successfully penetrate the pollution zone, remove near-well pollution, and increase the drainage area of ​​the wellbore, but it is only applicable to relatively soft for...

AI Technical Summary

Problems solved by technology

[0003] The penetration depth of commonly used perforation methods is relatively short, only 0.4-1m, and the perforation compaction effect is likely to cause secondary damage to the formation, and the permeability around the blasthole is reduced by 70%-80%.

Radial hydrojet drilling technology can successfully penetrate the pollution zone, remove near-well pollution, and increase the drainage area of ​​the wellbore, but it is only suitable for relatively soft formations, and the construction effect in hard formations is limited

In addition, for the strata that are easy to collapse and produce sand, the holes after spraying are unstable and easy to collapse and block, which seriously affects the construction effect

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