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1.发明公开
公开(公告)号：EP4251850A2
公开(公告)日：2023-10-04
申请号：EP21918064.3
申请日：2021-12-17
申请人： Rairigh, James, G.
发明人： Rairigh, James, G.
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2.发明公开
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公开(公告)号：EP3250778A1
公开(公告)日：2017-12-06
申请号：EP15880607.5
申请日：2015-09-18
IPC分类号： E21B29/00 , E21B29/02 , E21B33/124
摘要： A high energy pipe severing tool is arranged to align a plurality of pressure balanced explosive pellets along a unitizing central tube that is selectively separable from a tubular external housing. The explosive pellets are loaded serially in a column and in full view along the entire column as a final charging task. Detonation boosters are pre-positioned and connected to detonation cord for simultaneous detonation at opposite ends of the explosive column. Devoid of high explosive pellets during transport, the assembly may be transported with all boosters and detonation cord connected.
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4.发明公开
公开(公告)号：EP3837424A1
公开(公告)日：2021-06-23
申请号：EP19849454.4
申请日：2019-08-15
申请人： Rairigh, James, G.
发明人： Rairigh, James, G.
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公开(公告)号：EP3356640A1
公开(公告)日：2018-08-08
申请号：EP15904281.1
申请日：2015-09-18
IPC分类号： E21B29/00
CPC分类号： E21B29/02
摘要： A mini-severing and back-off tool includes a tubular magazine for a column of explosive pellets that are sized in diameter to provide a predetermined weight of explosive per unit column length. The tubular wall is vented at prescribed intervals for fluid pressure equalization between the internal bore of the tubular and the fluid pressure around the outside of the tubular. A fluid barrier is positioned between one end of the explosive pellet tubular and a detonator or an explosive booster provided to detonate the explosive pellet tubular. The explosive pellet tubular is positioned within the flow bore of a pipe string and adjacent to an intended pipe joint, and the explosive pellet tubular is detonated simultaneously with an application of torque on the pipe string, wherein the torque is applied in the thread release direction to disassemble the intended pipe joint.
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公开(公告)号：EP3350406A1
公开(公告)日：2018-07-25
申请号：EP15904283.7
申请日：2015-09-18
IPC分类号： E21B29/00
CPC分类号： E21B31/1075 , E21B29/02 , F42D1/05
摘要： A “back-off” tool comprises a magazine cylinder having one distal end of a long mast rod secured to the lower end-face of a magazine cylinder. The magazine cylinder is attached to an electrically detonated firing head. A first plurality of blind hole cavities penetrate the magazine cylinder end-face around the mast rod junction. A second plurality of elongated detonation cord ends are inserted into high temperature grease filled magazine cylinder cavities. From the cavities, the detonation cord lengths are bound to the rod surface along the rod length by non-metallic cord. The tool assembly is secured to the end of a wireline or tubing string for downhole placement and detonation.
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