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Powder metal gripping elements for settable downhole tools having slips

a technology of gripping elements and downhole tools, which is applied in the direction of sealing/packing, earthwork drilling and mining, and well accessories, etc., can solve the problems of hard carbide gripping elements, and achieve the effects of easy machining, light to moderate loading, and high density

Inactive Publication Date: 2018-05-10
MAGNUM OIL TOOLS INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes certain inserts used in drilling operations that are harder and more drillable than previous designs. These inserts can be easier to remove and leave less debris, leading to faster and cleaner drilling.

Problems solved by technology

However, hard carbide gripping elements are an impediment to quickly milling out the plug.

Method used

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  • Powder metal gripping elements for settable downhole tools having slips
  • Powder metal gripping elements for settable downhole tools having slips
  • Powder metal gripping elements for settable downhole tools having slips

Examples

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Embodiment Construction

[0042]Powder metal (“PM”) parts may be heat treated in a number of ways. The heat treatment may include the following: austenitizing; quenching; tempering; normalizing; case hardening; gas nitriding; carburizing; local hardening; induction; flame and laser.

[0043]Case hardening is the process of hardening the surface and a region close to the surface of a metal object, including Applicant's powder metal gripping elements, allowing the metal underneath to remain soft, thus forming an outer layer of harder metal (sometimes called the “case”) at and near the surface. Case hardening may involve infusing additional carbon or other material (such as nitrogen) into the surface layer. It may be done after the part is formed into its final shape typically through compaction and sintering.

[0044]Mild steels with a low carbon content, usually up to or less than about 0.3%, may have their surface modified chemically to increase the hardness or hardenability. Case hardened steel and some embodimen...

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Abstract

A settable downhole tool with millable powder metal slips having a case hardened edge and a soft core.

Description

[0001]This utility application claims priority to, and the benefit of, provisional patent application No. 62 / 419,214, filed Nov. 8, 2016, and is a continuation-in-part of patent application Ser. No. 15 / 672,790, filed Aug. 9, 2017. Both of these prior applications are herein incorporated by reference in their entirety.FIELD OF THE INVENTION[0002]Settable downhole tools having slips for anchoring the downhole tools in a wellbore, the slips having at least one slip button or wicker made of a millable powder metal material.BACKGROUND OF THE INVENTION[0003]In drilling or reworking oil or gas wells, a number of downhole tools may be used to seal tubing, casing or other pipe. Some of these downhole tools are packers and bridge plugs and may be settable tools with drillable (millable) components made from materials including mild steel, cast iron, plastics, and / or composites. Downhole tools may include slips which hold gripping elements for setting and anchoring the tool against the casing ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B33/12E21B33/129
CPCE21B33/1204E21B33/129E21B33/1208E21B33/1291
Inventor FRAZIER, W. LYNN
Owner MAGNUM OIL TOOLS INT