US 10,480,258 B2Granted

Sealed pipe joint

AssigneesSingle Buoy Moorings Inc., GMC Co., Ltd.

InventorsJack Pollack, David C. Riggs

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Abstract

In a pipe joint where two pipe sections (14, 16) have threadably engaged end portions (17, 18), joint ends (32, 34) are substantially sealed to each other by a sealing surface (40, 50) on one pipe section that substantially abuts a sealing surface (42, 52) on the other pipe section. In one joint, a ring-shaped cutout (121, FIG. 7) is formed in a first pipe section and a ring-shaped spacer (120) is located in the cutout. The spacer is chosen from several that have slightly different lengths so the spacer end contacts the corresponding sealing surface (130). In a pipe string used to carry corrosive fluid, the inner surface (44) of adjacent pipe sections is covered with a corrosion resistant coating (70, 72). Where the sealing surface is connected to a rounded corner (82, 84), the coating extends to and along the sealing surfaces (40, 42). Where there are sharp corners (80) at the intersection of the inside surface (40) with the sealing surface (40B, 42B), the coating does not extend along the sealing surfaces.

Claims15

Dependent claims

A pipe string (102), comprising:

a pipe joint (100) that connects first and second threaded ends (104, 106) of a pair of pipe sections (110, 112),
said pipe joint having first and second joint ends (114, 116), said joint ends including a first joint end (116) having facewise adjacent, directly abutting first axial sealing surfaces (50, 52) that are perpendicular to a longitudinal axis of the pipe joint,
wherein a second joint end (114) of said joint ends has a ring-shaped cutout (121) lying adjacent to a second axial sealing surface (130), so said second joint end has a short second end (125) that is spaced from said second axial sealing surface (130) that is perpendicular to the longitudinal axis of the pipe joint,
the second joint end also having a ring-shaped spacer (120), formed of a substantially incompressible material, located between and directly axially abutting said short second end (125), at a sealing or abutting axial face (132) that is also perpendicular to the longitudinal axis of the pipe joint, and said second axial sealing surface (130), and
wherein said ring-shaped spacer (120) is sized and configured such that the first axial sealing surfaces (50, 52), the spacer (120), the short second end (125) at the abutting face (132), and the second axial sealing surface (130) are each loaded in the axial direction of the pipe (102) when the pipe joint (100) is fully assembled.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/794,521Filed 26 Oct 2017 · continuation
Priority: 22 Mar 2010
Published: US 2018/0058152 A11 Mar 2018
Granted: 19 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

E21B 17/042
Between rod or the like and bit or between rod and rod or the like: threaded
F16L 15/004
With conical threads: with axial sealings having at least one plastically deformable sealing surface
F16L 15/06
Screw-threaded joints; Forms of screw-threads for such joints: characterised by the shape of the screw-thread
E21B
Earth or rock drilling

Family

Application61/316,371Us provisional application · filed 22 Mar 2010
Application13/013,739Parent of this division · filed 25 Jan 2011
Application13/846,253Parent of this continuation · filed 18 Mar 2013
US 2018/0058152 A1Pre-grant publication · published 1 Mar 2018
US 9,828,812 B2Parent of this continuation
Application13/846,253Parent of this division
US 2011/0227338 A1Published application
US 2014/0265320 A1Published application
US 10,480,258 B2This patent

From the US filing history. Foreign family members aren’t listed.

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