초록 ▼

A variable downhole choke is disclosed wherein an outer housing includes a selected port pattern of ports and subports and a sleeve having similar ports and subports wherein subports depend from ports on each of the housing and sleeve. The ports/subports are oriented so that upon converging movement

A variable downhole choke is disclosed wherein an outer housing includes a selected port pattern of ports and subports and a sleeve having similar ports and subports wherein subports depend from ports on each of the housing and sleeve. The ports/subports are oriented so that upon converging movement of housing and sleeve the sleeve subports align with housing subports before the sleeve ports align with housing ports.

대표청구항 ▼

1. A variable downhole choke comprising:a choke insert having at least one choke insert port and choke insert subport forming a port/subport combination wherein the choke insert subport depends from the choke insert port; and a choke housing having at least one choke housing port and housing subport

1. A variable downhole choke comprising:a choke insert having at least one choke insert port and choke insert subport forming a port/subport combination wherein the choke insert subport depends from the choke insert port; and a choke housing having at least one choke housing port and housing subport forming a port/subport combination wherein the housing subport depends from the housing port and wherein the choke insert port/subport combination orients the choke insert subport toward the housing subport of the housing port/subport combination such that upon relative movement of the choke housing and choke insert, the choke housing subport and choke insert subport align prior to the choke housing port and choke insert port.