Search International and National Patent Collections

1. (WO2017065605) A TOP DRIVE WELL DRILLING INSTALLATION

Pub. No.:    WO/2017/065605    International Application No.:    PCT/NL2016/050698
Publication Date: Fri Apr 21 01:59:59 CEST 2017 International Filing Date: Sat Oct 08 01:59:59 CEST 2016
IPC: E21B 3/02
E21B 19/06
E21B 15/00
Applicants: ITREC B.V.
Inventors: VAN DUIVENDIJK, Pieter Dirk Melis
WIJNING, Diederick Bernardus
MAX, Nicolaas Thijs Pieter
BAKKER, Jasper Hendrik Frank
ROODENBURG, Joop
VAN SWIETEN, Adriaan
Title: A TOP DRIVE WELL DRILLING INSTALLATION
Abstract:
The present invention relates to a top drive well drilling installation comprising a trolley guided along one or more vertical rails along the drilling tower, which trolley is provided with a support frame supporting the top drive unit and a rotating headclamp. The rotating headclamp comprises an open-centered rotary body defining a pipe passage; a thrust bearing supporting the rotary body; and multiple mobile pipe retainers supported by the rotary body providing an operative and a non-operative position allowing passage of a pipe and engagement below a shoulder of a pipe of the drill string so as to suspend said drill string therefrom. At least the tubular stem is vertically movable relative to the rotating headclamp between an upper remote position allowing the engagement of a pipe of the drill string by the rotating headclamp and a lower connection position allowing the attachment of the tubular stem with the pipe.