TOP-DOWN SQUEEZE SYSTEM AND METHOD

• Main Authors: GRAY MATTHEW, MOELLER DANIEL, STROHLA NICHOLAS
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2019
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

A downhole tool subassembly having an outer sleeve with a first set of apertures extending from an inner bore through an external surface of the outer sleeve. The downhole tool subassembly further includes a pin coupled to the outer sleeve and extending inward from the inner bore of the outer sleeve, and an inner sleeve slidingly engaged with the with outer sleeve. The inner sleeve has a slot anda second set of apertures extending from a sleeve bore of the inner sleeve through an external surface of the inner sleeve, and is operable to restrict flow across the first set of apertures when theinner sleeve is in a first position. The pin engages the slot, which includes a first tracking path and a second tracking path. The slot also includes a first transition path extending from the firsttracking path to the second tracking path. 一种井下工具子组件具有外部套筒，所述外部套筒具有第一组孔口，所述第一组孔口从内部钻孔延伸穿过所述外部套筒的外表面。所述井下工具子组件还包括耦合到所述外部套筒并且从所述外部套筒的所述内部钻孔向内延伸的销，以及与所述外部套筒滑动地啮合的内部套筒。所述内部套筒具有槽和从所述内部套筒的套筒钻孔延伸穿过所述内部套筒的外表面的第二组孔口，并且可操作以在所述内部套筒处于第一位置时