Interchangeable packoff assembly for wellheads

Patent metadata

Field	Value
Publication number	US-11976529-B2
Application number	US-202217860210-A
Country	US
Kind code	B2
Filing date	Jul 8, 2022
Priority date	Jul 9, 2021
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A packoff for a wellhead includes a body configured to be positioned in an annulus between the wellhead and an inner tubular above a casing hanger supported in the wellhead, the body including a bore and a lower end, the bore and the lower end being configured to be positioned at least partially around the inner tubular. The lower end is configured to be spaced apart from the casing hanger. The packoff also includes a first load shoulder member configured to be removably connected to the lower end of the body and to engage a surface of the casing hanger so as to form a seal therewith.

First claim

What is claimed is:

1. A kit for a packoff for a wellhead, the kit comprising: a body of a packoff configured to be positioned in an annulus between the wellhead and an inner tubular, wherein the body comprises a bore and a lower end, the bore and the lower end being configured to be positioned at least partially around the inner tubular; a first load shoulder member configured to be removably connected to the lower end of the body using bolts and to engage a surface of a casing hanger so as to form a seal therewith; and a second load shoulder member configured to be removably connected to the lower end of the body with the bolts, wherein the second load shoulder member comprises an annular body and a shoulder extending radially-inward therefrom, wherein the shoulder defines first holes, wherein the lower end of the body defines second holes therein for receiving the bolts, wherein the first load shoulder member defines third holes therethrough that align with the second holes to receive the bolts, wherein the first holes align with the second holes to receive the bolts, and wherein the annular body defines fourth holes which receive anti-rotation members.

2. The kit of claim 1 , wherein the second load shoulder member is configured to engage the surface of the casing hanger and fit around slips of a contingency casing hanger, and wherein the first load shoulder member is not configured to fit around the slips of the casing hanger.

3. The kit of claim 2 , wherein the first and second load shoulder members are interchangeably connectable to the body.

4. The kit of claim 2 , wherein the second load shoulder member has a lower axial end surface, wherein the lower axial end surface is configured to engage a bowl of a contingency casing hanger, and wherein the shoulder is configured to fit over slips of the contingency casing hanger.

5. The kit of claim 2 , wherein the first load shoulder member defines pockets that communicate with the third holes, the pockets extending radially from an inner diameter surface of the first load shoulder member and axially from a lower axial end surface of the first load shoulder member.

6. The kit of claim 2 , wherein the second load shoulder member defines pockets that communicate with the fourth holes and extend radially from an inner diameter surface of the shoulder thereof and axially from a lower axial end surface of the second load shoulder member.

7. The kit of claim 2 , further comprising a sensor coupled to the wellhead and configured to detect when the second load shoulder member engages the casing hanger.

8. The kit of claim 1 , wherein the body defines a landing shoulder extending into the bore configured to receive and axially support a second casing hanger in the wellhead.

9. The kit of claim 1 , wherein the first load shoulder member is configured to be disconnected from the lower end of the body and replaced with the second load shoulder member in response to the casing hanger not reaching a landing shoulder of the wellhead, and wherein the second load shoulder member, when connected to the lower end of the body, is configured to engage a bowl of a contingency slip hanger in the wellhead.

10. The kit of claim 1 , wherein the annular body extends farther axially downward than the shoulder, forming a stepped profile for an inner surface diameter of the second load shoulder member.

11. The kit of claim 1 , wherein the stepped profile permits the packoff to be lowered into engagement with a bowl of the contingency slip hanger, as an axial offset of the shoulder from a lower axial end surface of the annular body accommodates slips of the contingency hanger, which extend upward from the bowl.

12. A kit for a packoff for a wellhead, the kit comprising: a body of a packoff configured to be positioned in an annulus between the wellhead and an inner tubular, wherein the body comprises a bore and a lower end, the bore and the lower end being configured to be positioned at least partially around the inner tubular, wherein the lower end of the body defines first holes therein for receiving bolts; a first load shoulder member having second holes which align with the first holes to receive the bolts, the first load shoulder member configured to be removably connected to the lower end of the body and to engage a surface of a casing hanger so as to form a seal therewith; and a second load shoulder member configured to be removably connected to the lower end of the body, wherein the second load shoulder member comprises an annular body and a shoulder extending radially-inward therefrom, wherein the annular body extends farther axially downward than the shoulder, forming a stepped profile for an inner surface diameter of the second load shoulder member, wherein the annular body defines third holes that receive anti-rotation features, and wherein the shoulder defines fourth holes that align with the first holes to receive the bolts.

13. The kit of claim 12 , wherein the first load shoulder member is configured to be disconnected from the lower end of the body and replaced with the second load shoulder member in response to the casing hanger not reaching a landing shoulder of the wellhead.

Assignees

• Innovex Downhole Solutions Inc

Inventors

• Sneed Brian
• Terebo Moyo
• Mcgilvray Jr Mark

Classifications

• E21B33/0422 Primary

  a suspended tubing or casing being gripped by a slip or an internally serrated member · CPC title

• E21B33/04 Primary

  Casing heads; Suspending casings or tubings in well heads · CPC title