Method for top-driving casing job of drilling apparatus

Abstract

A method for casing job by using a top drive drilling unit is applied to the petrol cementing technique field, and is characterized in that a casing elevator is used for lifting a single casing which is buckled with a casing string oppositely; a top-driven casing device is driven to tightly clamp the single casing; the top drive drilling unit is driven to revolve, which allows the single casing to be connected with the casing string; an air slips of a drill stand is loosed, which allows a top-driven flying ring and the casing elevator to support the single casing and the casing string; the single casing and the casing string are lowered; the air slips of the drill stand is used for fixing the single casing; slurry is poured to the interior cavities of the single casing and the casing string through a chief axis hydrophthalmia of the top drive drilling unit and a central spindle hydrophthalmia of the top-driven casing device; and finally, all the casing strings are lowered to the well bottom. The method has the advantages of reducing working equipments, simplifying working process, being capable of revolving casing string and cycling slurry timely according to the actual needs, increasing the automatic degree of the casing job, and improving the production efficiency and safety.

Description

technical field [0001] The invention relates to the technical field of petroleum cementing, in particular to a method for running casing with a top drive drilling device. Background technique [0002] According to the design requirements of the drilling wellbore structure, the casing needs to be run and the cementing operation is performed after each stage of drilling is completed. Casing is to connect each casing with a length of about 10 meters together one by one to form a casing string, and at the same time run the casing into the well; the cementing operation is to inject Cement slurry, which fixes the casing string to the well wall after the cement slurry solidifies. According to statistics, a well needs to take up to 12-20% of the total rig time to connect the casing string and run it into the well. [0003] When most drilling teams complete this special casing operation, they need to hire a professional "casing team" to complete it. [0004] refer to figure 1 . ...

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a method for running casing with a top drive drilling device, which can complete the casing running operation, provide reliable casing straightening and stabbing, and realize precise control of casing twisting torque, which can be used at any time Rotate the entire casing string to inject or circulate mud at any time. It has the characteristics of safety and high efficiency. It can overcome the complicated casing twisting existing in the conventional casing operation, the casing string suspended in the wellbore cannot be rotated, and the mud cannot be circulated. The problem of low efficiency of casing running operation

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