Anchoring tool for windowing and side drilling of branched well

Abstract

The invention relates to an anchoring tool for windowing and side drilling of a branched well. The anchoring tool comprises an upper joint, a middle joint, a butting pipe and a lower joint. The anchoring tool is characterized by also comprising a hanging assembly, an anchoring assembly and a piston linkage mechanism, wherein the hanging assembly comprises a clamping spring plug, a clamping spring seat, a clamping spring and a clamping spring shaft; one end of the clamping spring shaft is connected with a hanging core shaft; the piston linkage mechanism comprises an upper limiter, an upper piston, a lower piston and a lower limiter; and the anchoring assembly comprises a locking pipe connected with the butting pipe, an upper slip seat, an upper slip, a lower slip seat and a lower slip. The anchoring tool has the advantages that: anchoring and hanging functions and windowing and side drilling operations of a guider can be finished by one-time drilling in a hydraulic mode and a mechanical mode; the operation can be simplified, and the work efficiency is improved; and the double-slip structure is stable and reliable, can bear bidirectional acting force, and has good strain capacity under complex operating conditions. Moreover, after the side drilling operation is finished, displacement of the anchoring tool can be avoided, so that positioning accuracy and operating safety of the branched well in later operations are ensured.

Description

technical field [0001] The invention belongs to the technical field of oil field development and production, and in particular relates to an anchoring tool used for lateral drilling of branch wells. Background technique [0002] With the large-scale development of oil and gas fields, a large number of new or old wells need sidetracking to increase production, especially the branch well technology that has emerged in recent years is a drilling developed after directional wells, sidetracking wells, and horizontal wells. New technology, this technology drills several branch wells in one wellbore to increase the drainage area, improve the production of oil wells and reduce the cost of reservoir development. [0003] At present, most of the anchoring tool structures commonly used in sidetracking in China use a single-slip structure. Enter the window opening tool to open the window. In the above operation process, the reliability of the single slip structure is low, and it can o...

AI Technical Summary

Problems solved by technology

In the above operation process, the reliability of the single slip structure is low, and it can only bear one-way force, and the strain capacity is low when the operation is complicated.

In addition, after the sidetracking operation is completed, the anchoring tool may be displaced, resulting in an error in the positioning of the branch well in the later stage, making it difficult to guarantee the operation safety and low efficiency

Similar foreign products are not conducive to large-scale application in oil field operations due to their structural limitations and high prices

Images