公开(公告)号：US20170268300A1

公开(公告)日：2017-09-21

申请号：US15505117

申请日：2015-07-08

Applicant: MHWIRTH AS

Inventor： PER MORTEN LOEVSLAND

IPC: E21B19/086 ,  E21B19/16 ,  B66D1/60

CPC classification number: E21B19/086 ,  B66D1/60 ,  B66D2700/026 ,  E21B19/08 ,  E21B19/16

Abstract: A positioning and compensation system for a tubular element to be connected to a drill string includes a gripping arm assembly with a gripping device which holds the tubular element in a position for connection to the drill string, and a load supporting and compensating arrangement which supports at least a portion of a load of the tubular element. The load supporting and compensating arrangement includes a cylinder unit having a piston, a winch, a sheave which is connected to the gripping arm assembly, and a wire. The wire is arranged to run around the sheave with a first end being connected to the piston and a second end being connected to the winch. The winch and the cylinder unit are each arranged in a respective elevated position compared to a position of the sheave. The cylinder unit maintains a minimum tension in the wire.

公开(公告)号：US20160251915A1

公开(公告)日：2016-09-01

申请号：US15030599

申请日：2014-09-29

Applicant: MHWIRTH AS

Inventor： PER MORTEN LOEVSLAND

IPC: E21B19/14 ,  B66F11/00

CPC classification number: E21B19/14 ,  B66F11/00 ,  E21B19/087 ,  E21B19/15

Abstract: A lifting arm arrangement includes a gripper head arm, a lifting arm, and a lifting cylinder. A gripper head is fastened to a first gripper head arm end. A first lifting arm end is pivotally connected to the gripper head arm. A second lifting arm end is pivotally connected to a stationary lifting cylinder part. A second gripper head arm end is pivotally connected to a movable lifting cylinder part. The stationary lifting cylinder part comprises a cylinder with a cylinder cavity having first and second cylinder openings. A piston rod with a piston is arranged in the cylinder cavity. A first piston rod portion projects from a first piston end of the piston. A second piston rod portion projects from an opposite second piston end of the piston. Working areas of the first and second piston ends are substantially equal to each other.

Abstract translation: 提升臂装置包括夹头头臂，提升臂和提升缸。 夹头头部固定在第一夹头头臂端。 第一提升臂端枢转地连接到夹持器头臂。 第二提升臂端枢转地连接到固定的提升缸部分。 第二夹头头臂端枢转地连接到可动提升缸部分。 固定提升缸部分包括具有气缸腔的气缸，其具有第一和第二气缸开口。 具有活塞的活塞杆布置在气缸腔中。 第一活塞杆部从活塞的第一活塞端突出。 第二活塞杆部分从活塞的相对的第二活塞端突出。 第一和第二活塞端部的工作区域基本上彼此相等。