公开(公告)号：US20220275685A1

公开(公告)日：2022-09-01

申请号：US17629057

申请日：2020-07-21

Applicant: NATIONAL OILWELL DHT, L.P.

Inventor： Khoi Trinh ,  Steve Bhagwandin ,  Yufang Xia ,  Ian Forster

IPC: E21B7/24 ,  E21B34/14

Abstract: Embodiments disclosed herein are directed to a flow pulsing system including a rotor, a stator, a dart which is configured to releasably couple with the rotor, and a nozzle releasably coupled to the rotor which is configured to control a fluid flow through the rotor. In some embodiments, the system uses a screen disposed therein which includes an inner bore in fluid communication with a plurality of lobe cavities along the rotor. In some embodiments, the system uses a stationary valve and an oscillating valve having a plurality of oscillating valve ports which are in fluid communication with the plurality of lobe cavities.

公开(公告)号：US20140216761A1

公开(公告)日：2014-08-07

申请号：US14165202

申请日：2014-01-27

Applicant: National Oilwell DHT, L.P.

Inventor： Khoi Trinh

IPC: E21B34/14

CPC classification number: E21B23/04 ,  E21B10/322

Abstract: A downhole activation assembly for activating a downhole component of a downhole tool positionable in a wellbore penetrating a subterranean formation. The activation assembly includes a housing operatively connectable to the downhole tool, a spring-loaded sleeve, and a ball catcher. The sleeve slidably positionable in the housing, and having a flow channel therethrough and an outer surface defining a chamber between the sleeve and the housing. The sleeve having inlets therethrough about a sleeve end thereof to permit fluid from the flow channel to pass therethrough. The ball catcher slidably positionable in the housing, and having a catcher end engageable with the sleeve end to selectively divert the fluid thereabout and a ball seat therein to receivingly engage a ball passing through the sleeve whereby the ball catcher selectively moves the downhole component between activation positions.

Abstract translation: 一种井下活化组件，用于激活定位在穿透地下地层的井眼中的井下工具的井下部件。 激活组件包括可操作地连接到井下工具的壳体，弹簧加载的套筒和球捕获器。 所述套筒可滑动地定位在所述壳体中，并且具有穿过其的流动通道和限定所述套筒和所述壳体之间的室的外表面。 套筒具有穿过其中的套筒端部的入口，以允许来自流动通道的流体通过。 球捕获器可滑动地定位在壳体中，并且具有捕获器端部，其可与套筒端部接合以选择性地将其周围的流体转向，并且其中的球座接收地接合穿过套筒的球，由此，球捕获器选择性地在活塞之间移动井下部件 职位

公开(公告)号：US09435168B2

公开(公告)日：2016-09-06

申请号：US14165202

申请日：2014-01-27

Applicant: National Oilwell DHT, L.P.

Inventor： Khoi Trinh

IPC: E21B23/04 ,  E21B10/32

CPC classification number: E21B23/04 ,  E21B10/322

Abstract: A downhole activation assembly for activating a downhole component of a downhole tool positionable in a wellbore penetrating a subterranean formation. The activation assembly includes a housing operatively connectable to the downhole tool, a spring-loaded sleeve, and a ball catcher. The sleeve slidably positionable in the housing, and having a flow channel therethrough and an outer surface defining a chamber between the sleeve and the housing. The sleeve having inlets therethrough about a sleeve end thereof to permit fluid from the flow channel to pass therethrough. The ball catcher slidably positionable in the housing, and having a catcher end engageable with the sleeve end to selectively divert the fluid thereabout and a ball seat therein to receivingly engage a ball passing through the sleeve whereby the ball catcher selectively moves the downhole component between activation positions.

Abstract translation: 一种井下活化组件，用于激活定位在穿透地下地层的井眼中的井下工具的井下部件。 激活组件包括可操作地连接到井下工具的壳体，弹簧加载的套筒和球捕获器。 所述套筒可滑动地定位在所述壳体中，并且具有穿过其的流动通道和限定所述套筒和所述壳体之间的室的外表面。 套筒具有穿过其中的套筒端部的入口，以允许来自流动通道的流体通过。 球捕获器可滑动地定位在壳体中，并且具有捕获器端部，其可与套筒端部接合以选择性地将其周围的流体转向，并且其中的球座接收地接合通过套筒的球体，由此球捕集器选择性地在活塞之间移动井下部件 职位