Dynamic pushing type eccentric weight correction vertical drilling tool

Abstract

The invention discloses a dynamic pushing type automatic vertical drilling tool. The dynamic pushing type automatic vertical drilling tool comprises an upper connector 28, an outer cylinder 20 and a hydraulic end shell 1 which are located outside and sequentially arranged from top to bottom, and a positioning core pipe 19 and a balancing weight 21 which are located inside; the lower end of the positioning core pipe 19 is connected to a semicircular tube; a plurality of through holes are formed in parallel in one side, opposite to the balancing weight, of the middle cylindrical surface of the semicircular pipe; the semicircular pipe is sleeved with a track cylinder which is fixed with an external hydraulic end shell into a whole, and three drilling fluid channels corresponding to through holes of the semicircular pipe are formed in the circumferential surface of the track cylinder at equal angular distance intervals; and plunger push plate mechanisms corresponding to the drilling fluid channels are respectively embedded in three notches in the circumferential direction of the hydraulic end shell. According to the dynamic pushing type automatic vertical drilling tool, traditional radial distribution of hydraulic power is changed into axial distribution, so that pushing force is improved; and according to the mechanical structure configuration of automatic steering according to the self weight of the balancing weight, a positioning detection component is omitted, the mounting space of the balancing weight is maximized, the deviation correcting capacity is improved, and the sealing performance is excellent.

Description

technical field [0001] The invention relates to the technical field of drilling equipment and facilities for drilling construction, and more specifically, relates to a dynamic pushing type automatic vertical drilling tool. Background technique [0002] At present, in the drilling construction of industrialized platforms such as tight gas and shale gas, it has gradually been put on the agenda to drill large wells straight to avoid collisions, control the trajectory of small wells, and achieve the goal of comprehensive speed and efficiency improvement by optimizing the well trajectory. However, the vertical drilling tools used for straightening and anti-deviation of the upper large wellbore are monopolized by foreign oil service companies, and the domestic development is seriously lagging behind, and the service price is relatively high. [0003] The form of equipment for drilling vertical wells in the prior art is: drill bit + dynamic pushing type automatic vertical drilling ...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned problems, the present invention solves the problems existing in the existing equipment such as weak rectification ability, poor sealing, non-adjustable plunger pressure, and limited thrust of the wing plate due to the limitation of the installation structure of the upper disc valve and the lower disc valve, etc. In particular, it solves the problem of insufficient weight due to the limitation of the radial and axial dimensions of the eccentric weight

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