Element

• US 10,689,940 B2
• Filed: 04/17/2018
• Issued: 06/23/2020
• Est. Priority Date: 04/17/2018
• Status: Active Grant

• Current Assignee: Baker Hughes Holdings LLC (Baker Hughes Company)
• Original Assignee: Baker Hughes, a GE Company, LLC (Baker Hughes Company)
• Inventors: Parekh, Yash, Xu, YingQing, Russell, Ronnie, Pratt, Barbara
• Primary Examiner(s): Hutchins, Cathleen R
• Application Number:
  US15/955,265
• Publication Number:
  US 20190316438A1
• Time in Patent Office: 798 Days
• CPC Class Codes: E21B 33/12 Packers; Plugs used for cementing E21B33/134, E21B33/16
• CPC Class Codes: E21B 33/1208 characterised by the construction of the sealing or packing means E21B33/1277 takes precedence
• CPC Class Codes: E21B 33/128 with a member expanded radially by axial pressure E21B33/122, E21B33/124 take precedence
• CPC Class Codes: E21B 33/1291 anchor set by wedge or cam in combination with frictional effect, using so-called drag-blocks E21B33/1295 takes precedence
• CPC Class Codes: E21B 33/134 Bridging plugs
• CPC Class Codes: F16J 15/18 with stuffing-boxes for elastic or plastic packings
• CPC Class Codes: F16L 55/11 Plugs F16L55/128 takes precedence

Abstract

An element including an undercut in the element extending from an innermost surface of the element radially outwardly into the element, and a pathway intersecting the undercut and extending from the undercut to an outermost surface of the element, the pathway fluidly connecting the outermost surface of the element to the undercut prior to setting of the seal.

Claims

1. A seal comprising:

an element having a frustoconical inside surface extending from one axial end of the element to the other axial end of the element, an outside surface of the element, a lip at a leading end of the element and a ramp extending from the lip to the outside surface;

an undercut in the element extending through the frustoconical inside surface of the element radially outwardly into the element, the frustoconical surface continuing on both axial ends of the undercut at least partially longitudinally overlapping the ramp; and

a pathway intersecting the undercut and extending from the undercut to an outermost surface of the element, the pathway fluidly connecting the outermost surface of the element to the undercut prior to setting of the seal.

2. The seal as claimed in claim 1 wherein the lip is dimensioned to be 0.1% to 70% of the radial thickness of a remainder of the element.

3. The seal as claimed in claim 1 wherein the lip includes an undersurface that creates a fluid tight fit with a separate component.

4. The seal as claimed in claim 1 wherein the undercut is fully annular.

5. The seal as claimed in claim 1 wherein the undercut is partially annular.

6. The seal as claimed in claim 1 wherein the pathway is a plurality of pathways.

7. A seal comprising:

an element having a frustoconical inside surface extending from one axial end of the element to the other axial end of the element;

an undercut in the element extending through the frustoconical inside surface of the element radially outwardly into the element, the frustoconical surface continuing on both axial ends of the undercut;

a pathway intersecting the undercut and extending from the undercut to an outermost surface of the element, the pathway fluidly connecting the outermost surface of the element, to t undercut prior to setting of the seal; and

a fluid path at a trailing end of the element extending from the frustoconical inside surface to the outermost surface.