US 2015/0247602 A1Published application

Linestops, Nozzles and Completion Plugs for Installation in Pressurized Pipes

AssigneeAds

InventorsChristopher C. Vazzana, Carl Mastny, Stephen Roehrig, Panagiotis Tsafaras

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Abstract

This patent document discloses an improved series of nozzles and completion plugs for use in installing linestops in pressurized pipes. The improved nozzles are capable of accommodating two different types of completion plugs, including a threaded completion plug and a push-in type completion plug that is held in place within the nozzle by pins that extend through a flange of the nozzle. Lower edges of the nozzles are designed to facilitate the welding of the nozzle to an upper clamp or upper saddle member. Specifically, the lower or proximal beveled edge includes an inner lip that acts as a dam to prevent seepage of welding material between the proximal edge of the nozzle and the upper saddle member during the welding of the former to the latter.

Claims20

Dependent claims

A nozzle and completion plug combination, the combination comprising:

the nozzle including a cylindrical proximal section extending between a lower proximal end and an annular lower transition section, the lower transition section extending radially outwardly from the proximal section to a cylindrical middle section, the middle section extending from the lower transition section to an annular upper transition section, the upper transition section extending radially outwardly from the middle section to a cylindrical distal section, the distal section extending from the upper transition section to a distal flange, the distal flange including a plurality of through holes for receiving pins that extend into the distal section, the middle section including a threaded inner wall,
a completion plug selected from the group consisting of a threaded plug that threadably couples to the threaded inner wall of the middle section and push-in type plug with a plurality of recesses and that is frictionally received in the distal section and held in place by the pins with each pin partially received in one of the through holes of the distal flange and partially received in one of the recesses.

A method of providing a nozzle and completion plug combination for pipes having IDs of 4, 6 or 8 inches, the method comprising:

providing three cast nozzles, each nozzle including a cylindrical proximal section extending between a lower proximal end and an annular lower transition section, the proximal section having an ID of 4, 6 or 8 inches, the lower transition section extending radially outwardly from the proximal section to a cylindrical middle section, the middle section having an ID of greater than 8 inches, the middle section extending from the lower transition section to an annular upper transition section, the upper transition section extending radially outwardly from the middle section to a cylindrical distal section, the distal section having an ID of greater than the ID of the middle section, the distal section extending from the upper transition section to a distal flange, the distal flange including a plurality of through holes for receiving pins that extend into the distal section, the middle section including a threaded inner wall,
providing a completion plug selected from the group consisting of a threaded plug that threadably couples to the threaded inner wall of the middle section and push-in type plug having an OD that matches the ID of the distal section and having a plurality of recesses for receiving the pins with each pin partially received in one of the through holes and partially received in one of the recesses.

Dependencies are inferred from the claim text.