CA2590052A1 - Hollow shot inserts made of powder metal mixtures - Google Patents

Hollow shot inserts made of powder metal mixtures Download PDF

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Publication number
CA2590052A1
CA2590052A1 CA002590052A CA2590052A CA2590052A1 CA 2590052 A1 CA2590052 A1 CA 2590052A1 CA 002590052 A CA002590052 A CA 002590052A CA 2590052 A CA2590052 A CA 2590052A CA 2590052 A1 CA2590052 A1 CA 2590052A1
Authority
CA
Canada
Prior art keywords
weight
powder metal
metal mixtures
hollow charge
lead
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002590052A
Other languages
French (fr)
Inventor
Uwe Gessel
Malte Veehmayer
Liam Mcnelis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DynaEnergetics GmbH and Co KG
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2590052A1 publication Critical patent/CA2590052A1/en
Abandoned legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02Shaped or hollow charges
    • F42B1/032Shaped or hollow charges characterised by the material of the liner

Abstract

The invention relates to inserts for hollow shots made of cold pressed powder mixtures, which can, for instance be used in the oil and gas extraction industries in well blasting.

Description

HOLLOW SHOT INSERTS MADE OF I'OWDER METAL MIXTURES

The subject matter of the preserit invention is liners for hollow charges made of cold-pressed powder metal mixtures that are used for example for the purpose of blasting well drill holes in the oil and gas extraction industry.

For hollow charges that are used for the purpose of blasting well drill holes in the oil and gas extraction industry, the use of liners made of cold-pressed powder metal mixtures is prior art. Here, by powder metal mixtures are meant mixtures of metals and/or mixtures of alloys of metals in powder form. During cold-pressing, the powder metal mixtures are pressed into the final shape by compression under sufficiently high pressure without an additional supply of heat, as is disclosed in DE 19625897 B4. For this purpose, the mixture constituents of the powder metal mixture are previously mixed in accordance with their fractions. Hollow charge liners made of powder metal mixtures during blasting produce a dust jet, the terminal ballistic properties of which differ fundamentally from those of a plastically deforming jet, such as occurs when firing solid material liners. In particular, with hollow charge liners made of powder metal mixtures, even with low stand-off ranges, i.e. short distances between charge and target, it is possible to produce high penetration depths.

The powder metal mixtures that are used to manufacture the liners may vary widely. A mixture may contain for example 10 to 30 %' by weight of a soft metal, which serves as a binding agent, while the remaining fraction of the mixture may comprise harder metals. As a binding agent, lead is used in the majority of commercially available liners.
Also conceivable are other metals such as for example bismuth, silver, gold, tin, uranium, antimony, zinc, cobalt or nickel. The rest of the mixture often comprises heavy metals such as copper, bronze and/or tungsten in different mixing ratios.
In order to achi_eve greater penetration depths, in the relevant literature it is proposed to select as high a density as possible for the liner material. From an economic standpoint, therefore, tungsten in particular lends itself as a material for powder-metal hollow charge liners, as is proposed in US 5656791 A and DE 19625897 Al.
This leads to powder mixtures of lead and tungsten, the maximum density of which is achieved with a ratio of 20%
by weight lead to 80% by weight tungsten. With higher tungsten fractions, the compacts made from the mixture become unstable and can no longer be handled; lower tungsten fractions lead to a reduction of the density.
A problem that arises with liners made from mixtures of tungsten and lead is the formation of slugs. By slugs are meant residual pieces of the jet that block the penetration channels after the blast. In WO 2000/012858 A2 and US 6655291 B2 it is therefore proposed to add molybdenum to the tungsten-lead mixture in order to reduce slug formation.

A further drawback of pure tungsten-lead mixtures is the low hole diameter of the opening-shot holes. In the extraction of fluids from porous geological formations, the hole diameter of the opening-shot channel is however crucial for the hydraulic resistance during extraction. A
large hole diameter combined with a high penetration depth is therefore considered advantageous.

An object of the present invention was to provide liners for hollow charges, by means of which a large hole diameter combined with a high penetration depth is achieved.

According to the invention, the object is achieved by the features of the main claim. Advantageous developments are indicated in the sub-claims. In this case, it was discovered that the addition of light-metal powders, for example aluminium powder and/or titanium powder, to tungsten-lead mixtures or tungsten-copper/bronze-lead mixtures leads to a marked increase of the hole diameter without incurring large losses in terms of the penetration depth.

In addition to or instead of tungsten, tantalum and/or other heavy metals and/or alloys thereof may be used.
Furthermore, given the addition of light-metal powders and higher fractions of lead in the mixture, tungsten may be entirely replaced by bronze or copper or a mixture of these. In this case, bronze and copper are usable in any desired mixing ratios.

The subject matter of the present invention is in particular:

Hollow charge liners made of powder metal mixtures that contain 1 to 46% by weight, in a preferred manner 1 to 16%
by weight, in a particularly preferred manner 3 to 11% by weight aluminium and/or titanium, as well as lead and one or more substances selected from: one or more heavy metals and/or alloys thereof, in a preferred manner bronze, copper, tungsten, tantalum and/or molybdenum, and/or graphite.

Hollow charge liners made of powder metal mixtures that contain 14 to 30% by weight lead, 70 to 85% by weight tungsten and 1 to 16, in a preferred manner 3 to 11% by weight aluminium.

Hollow charge liners made of powder metal mixtures that contain 14 to 30% by weight lead, 70 to 85% by weight tungsten and 1 to 16, in a preferred manner 3 to 11o by weight titanium.

Hollow charge liners made of powder metal mixtures that contain 14 to 30% by weight lead, 10 to 50; in a preferred manner 10 to 30% by weight tungsten, 30 to 60, in a preferred manner 50 to 60% by weight bronze or copper or a mixture of these and 1 to 46, in a preferred manner 1 to 1.6, in a particularly preferred manner 3 to 11% by weight aluminium.

Hollow charge liners made from powder metal mixtures that contain 14 to 30% by weight lead, 10 to 50, in a preferred manner 10 to 30% by weight tungsten, 30 to 60, in a preferred manner 50 to 60% by weight bronze or copper or a mixture of these and 1 to 46, in a preferred manner 1 to 16, in a particularly preferred manner 3 to 11% by weight titanium.

Hollow charge liners made from powder metal mixtures that contain 14 to 50% by weight lead, 50 to 80% by weight bronze or copper or a mixture of these and 1 to 36, in a preferred manner 1 to 16, in a particularly preferred manner 3 to 11% by weight aluminium.

Hollow charge liners made from powder metal mixtures that contain 14 to 50% by weight lead, 50 to 80% by weight bronze or copper or a mixture of these and 1 to 36, in a preferred manner 1 to 16, in a particularly preferred manner 3 to 11% by weight titanium.

In order to avoid slugs, molybdenum may also be added to these powder metal mixtures according to the invention for manufacturing hollow charge liners.

Hollow charge liners made of powder metal mixtures that additionally contain graphite.

Hollow charge liners made of powder metal mixtures that, in addition to or instead of tungsten, contain tantalum and/or other heavy metals and/or alloys thereof.

Method of manufacturing hollow charge liners by cold-pressing powder metal mixtures.

Method of manufacturing hollow charge liners made of powder metal mixtures by mixing of the constituents in the appropriate fractions and subsequent compression into the final shape under sufficiently high pressure without an additional supply of heat.

Hollow charge liners according to the invention made of powder metal mixtures, manufactured by cold-pressing powder metal mixtures.

Use of the hollow charge liners according to the invention made of powder metal mixtures for blasting well drill holes.

The invention is described in detail by means of the following examples without thereby limiting the invention:
Example 1: Hollow charge liner 1 73.5 % by weight bronze 19.5 % by weight lead 7 % by weight titanium Example 2: Hollow charge liner 2 34.7 % by weight bronze 19.8 % by weight lead 38 % by weight tungsten 7 % by weight aluminium 0.5 % by weight graphite

Claims (13)

1. Hollow charge liners made of powder metal mixtures, characterized in that they contain 1 to 16% by weight, preferably 3 to 11% by weight aluminium and/or titanium, as well as lead and one or more heavy metals and/or alloys thereof, preferably bronze, copper, tungsten, tantalum and/or molybdenum, as well as optionally graphite.
2. Hollow charge liners made of powder metal mixtures according to claim 1, characterized in that they contain 14 to 30% by weight lead, 70 to 85% by weight tungsten and 1 to 16, preferably 3 to 11% by weight aluminium.
3. Hollow charge liners made of powder metal mixtures according to claim 1, characterized in that they contain 14 to 30% by weight lead, 70 to 85% by weight tungsten and 1 to 16, preferably 3 to 11% by weight titanium.
4. Hollow charge liners made of powder metal mixtures according to claim 1, characterized in that they contain 14 to 30% by weight lead, 10 to 50, preferably to 30% by weight tungsten, 30 to 60, preferably 50 to 60% by weight bronze or copper or a mixture of these and 1 to 16, preferably 3 to 11% by weight aluminium.
5. Hollow charge liners made of powder metal mixtures according to claim 1 or 4, characterized in that they contain 19.8% by weight lead, 38% by weight tungsten, 34.7% by weight bronze, 7% by weight aluminium and 0.5% by weight graphite.
6. Hollow charge liners made of powder metal mixtures according to claim 1, characterized in that they contain 14 to 30% by weight lead, 10 to 50, preferably to 30% by weight tungsten, 30 to 60, preferably 50 to 60% by weight bronze or copper or a mixture of these and 1 to 16, preferably 3 to 11% by weight titanium.
7. Hollow charge liners made of powder metal mixtures according to claim 1, characterized in that they contain 14 to 50% by weight lead, 50 to 80% by weight bronze or copper or a mixture of these and 1 to 16, particularly preferably 3 to 11% by weight aluminium.
8. Hollow charge liners made of powder metal mixtures according to claim 1, characterized in that they contain 14 to 50% by weight lead, 50 to 80% by weight bronze or copper or a mixture of these and 1 to 16, particularly preferably 3 to 11% by weight titanium.
9. Hollow charge liners made of powder metal mixtures according to claim 1 or 8, characterized in that they contain 19.5% by weight lead, 73.5% by weight bronze and 7% by weight titanium.
10. Method of manufacturing hollow charge liners made of powder metal mixtures according to at least one of claims 1 to 9 by cold-pressing powder metal mixtures.
11. Method according to claim 10, characterized in that the constituents are mixed in the appropriate fractions and pressed into the final shape by compression under sufficiently high pressure without an additional supply of heat.
12. Hollow charge liners made of powder metal mixtures according to at least one of claims 1 to 9, manufactured by a method according to claim 10 or 11.
13. Use of hollow charge liners made of powder metal mixtures according to one or more of claims 1 to 9 in the blasting of well drill holes.
CA002590052A 2004-12-13 2005-12-12 Hollow shot inserts made of powder metal mixtures Abandoned CA2590052A1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE102004060136 2004-12-13
DE102004060136.4 2004-12-13
DE102005002816.0 2005-01-20
DE102005002816 2005-01-20
DE102005011190.4 2005-03-09
DE102005011190 2005-03-09
PCT/EP2005/013283 WO2006063753A1 (en) 2004-12-13 2005-12-12 Hollow shot inserts made of powder metal mixtures

Publications (1)

Publication Number Publication Date
CA2590052A1 true CA2590052A1 (en) 2006-06-22

Family

ID=36046942

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002590052A Abandoned CA2590052A1 (en) 2004-12-13 2005-12-12 Hollow shot inserts made of powder metal mixtures

Country Status (6)

Country Link
US (1) US20090294176A1 (en)
EP (1) EP1828708A1 (en)
AR (1) AR051712A1 (en)
CA (1) CA2590052A1 (en)
NO (1) NO20072889L (en)
WO (1) WO2006063753A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10704867B2 (en) 2010-07-29 2020-07-07 Qinetiq Limited Oil well perforators

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8869703B1 (en) * 2012-10-19 2014-10-28 Textron Systems Corporation Techniques utilizing high performance armor penetrating round
US9862027B1 (en) 2017-01-12 2018-01-09 Dynaenergetics Gmbh & Co. Kg Shaped charge liner, method of making same, and shaped charge incorporating same
CN110770530A (en) * 2017-06-23 2020-02-07 德国德力能有限公司 Shaped charge liner, method of making same, and shaped charges containing same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388663A (en) * 1964-04-30 1968-06-18 Pollard Mabel Shaped charge liners
US5331895A (en) * 1982-07-22 1994-07-26 The Secretary Of State For Defence In Her Britanic Majesty's Government Of The United Kingdon Of Great Britain And Northern Ireland Shaped charges and their manufacture
US5221808A (en) * 1991-10-16 1993-06-22 Schlumberger Technology Corporation Shaped charge liner including bismuth
US5567906B1 (en) 1995-05-15 1998-06-09 Western Atlas Int Inc Tungsten enhanced liner for a shaped charge
US5656791A (en) 1995-05-15 1997-08-12 Western Atlas International, Inc. Tungsten enhanced liner for a shaped charge
US6354219B1 (en) 1998-05-01 2002-03-12 Owen Oil Tools, Inc. Shaped-charge liner
CA2334552C (en) * 2000-02-07 2007-04-24 Halliburton Energy Services, Inc. High performance powdered metal mixtures for shaped charge liners
US6962634B2 (en) * 2002-03-28 2005-11-08 Alliant Techsystems Inc. Low temperature, extrudable, high density reactive materials
US6564718B2 (en) * 2000-05-20 2003-05-20 Baker Hughes, Incorporated Lead free liner composition for shaped charges
US7011027B2 (en) * 2000-05-20 2006-03-14 Baker Hughes, Incorporated Coated metal particles to enhance oil field shaped charge performance
US6371219B1 (en) * 2000-05-31 2002-04-16 Halliburton Energy Services, Inc. Oilwell perforator having metal loaded polymer matrix molded liner and case
US7393423B2 (en) * 2001-08-08 2008-07-01 Geodynamics, Inc. Use of aluminum in perforating and stimulating a subterranean formation and other engineering applications

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10704867B2 (en) 2010-07-29 2020-07-07 Qinetiq Limited Oil well perforators
US11112221B2 (en) 2010-07-29 2021-09-07 Qinetiq Limited Oil well perforators

Also Published As

Publication number Publication date
AR051712A1 (en) 2007-01-31
US20090294176A1 (en) 2009-12-03
NO20072889L (en) 2007-09-04
WO2006063753A1 (en) 2006-06-22
EP1828708A1 (en) 2007-09-05

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Legal Events

Date Code Title Description
FZDE Discontinued