CN101611161A

CN101611161A - The high-strength material that is used for the roll forming of security system and other high-voltage applications

Info

Publication number: CN101611161A
Application number: CNA2007800513636A
Authority: CN
Inventors: W·M·贝利; K·C·霍姆斯
Original assignee: Baker Hughes Inc
Current assignee: Baker Hughes Holdings LLC
Priority date: 2007-02-16
Filing date: 2007-12-12
Publication date: 2009-12-23
Also published as: NO20092931L; WO2008100356A1; CA2676897A1; US20080196797A1; EP2111473A1

Abstract

Manufacturing is used for the method for the subsurface tool material of oil gas well, comprises the nickelalloy of solution heat treatment precipitation hardening; The described alloy of cold working after described solution heat treatment; The described alloy of timeliness is also made described material thus after described cold working.

Description

The high-strength material that is used for the roll forming of security system and other high-voltage applications

Background of invention

Reclaim in the industry at hydrocarbon, the employed instrument relevant with all aspects of fluid production is exposed under the very harsh condition at least potentially.These conditions can be nature, and as high temperature and high pressure, and some are attributable to fluid such as CO ₂, H ₂S, chlorion and acid stimulate.Should be appreciated that these conditions only are exemplary, and relate to other condition of impelling material stress, corrosion and/or environmental cracking (no matter nature still bring out) equally.

Because subsurface tool must be operated under the described conditions, so conventional experience is to use the material of very high strength and high corrosion resistance.See in the homemade and expensive outside alloy material of these character.Though these materials are known and will be very suitable for their predetermined purpose, they are very expensive and can not obtain with needed size usually.

Under needed very high strength, particularly according to NACE MR0175 standard, considerably less material meets the material requirements for corrosion and anti-environmental cracking.Very high strength, high erosion resistance, thicker wall thickness and the combination of dimensional homogeneity before only can obtain in exotic alloy such as MP35N and Elgiloy.

General introduction

Describe in detail

Materials limitations and the cost relevant with producing aforesaid very-high performance subsurface tool can reduce by the method for manufacturing subsurface tool described below.By adopting some procedure of processing with a certain order, obtain the nickelalloy of precipitation hardening greatly at an easy rate, it can mainly be strengthened to aspect intensity and make them be used as the level of very-high performance subsurface tool acceptably.At present, confessed as those of ordinary skill in the art, for the intensity existence restriction of these suitable corrosion resisting alloys that use in high pressure in well or the high corrosion environment.Describe in this article and in this article material processed will surmount current restriction for these alloys, improve total intensity and promotion bigger degree of freedom thus, and/or the performance (for example break, stretch) that makes the evaluation entire tool use is significantly higher for component shape and size.

The nickelalloy of precipitation hardening for example 725 (UNS NO7725) and 625+ (UNS NO7716) has been successfully used in the subsurface environment in the heavy corrosion environment, up to the SMYS of about 130-140ksi.This intensity is the peak value that uses solution treatment and timeliness thermal treatment to realize according to the requirement of NACE MR0175.When standing as the procedure of processing of being instructed herein, the strength level that can further strengthen this alloy is to about 160ksi or higher SMYS.

According to method disclosed herein, the nickelalloy that can make precipitation hardening now is to have higher SMYS and to keep high corrosion resistance.

In order to realize the benefit of above elaboration, make the nickelalloy of precipitation hardening under about 2000 temperature range, stand solutionizing thermal treatment and last about 30 minutes to about 4 hours time at about 1600 °F.This solutionizing will allow grain growing and impel out of phase little throw out dissolving in the substrate.Can use multiple time and temperature curve, constraint condition is that described throw out is dissolved.After this thermal treatment and other processing of alternative such as precipitation hardening, making described material basis method herein stand roll forming handles, in this material, introduce the quite cold working of a large amount of (between about 20% to about 90%) thus, perhaps in other words this material owing to the plastic deformation of material is strengthened.In roll forming technology, the roller that use to transmit force of compression extremely with blanks cold working so that the form that material " distortion " is stipulated with coupling in the rotation treatment process.The heat that in this processing, does not use the outside to apply, but it should be noted that owing to this roll forming technology moulding itself can cause that the temperature of target material raises.Roll forming technology is except by also providing almost clean forming ability the cold-work strengthening material, this has reduced mechanical workout and spillage of material.

Subsequently present cold worked material is led timeliness with its intensity of further increase.Timeliness was carried out about 2 to about 25 hours so that because the minimization of loss of the intensity component of strain hardening under about 1500 lesser temps at about 1000 °F.Because this aging technique, last mechanical workout often keeps tolerance better, because have lower internal residual stress in the material that the method by this paper prepares, so that the distortion during mechanical workout minimizes.

By using method described herein, can improve relatively inexpensive material is enough to quite or exceeds needed intensive property and the erosion resistance that current service requires to present.

Though showed and described embodiment preferred, can change and replace and do not break away from the spirit and scope of the present invention to it.Therefore, it should be understood that the present invention illustrates and unrestricted being described by way of example.

Claims

1. make the method for the subsurface tool material that is used for the oil gas well, comprising:

The nickelalloy of solution heat treatment precipitation hardening;

The described alloy of cold working after described solution heat treatment;

The described alloy of timeliness after described cold working.

2. the method for the manufacturing subsurface tool material of claim 1, wherein said solution heat treatment be about 1600 °F under about 2000 temperature range.

3. the method for the manufacturing subsurface tool material of claim 1, wherein said solution heat treatment be about 1/2 under about 4 hours time range.

4. the method for the manufacturing subsurface tool material of claim 1, wherein said cold working is roll forming.

5. the method for the manufacturing subsurface tool material of claim 1, the described material of the about 20%-of wherein said roll forming cold working about 90%.

6. the method for the manufacturing subsurface tool material of claim 1, wherein said timeliness be about 1000 °F in about 1500 temperature range.

7. the method for the manufacturing subsurface tool material of claim 1, wherein aging time is between about 2 hours and about 25 hours.

8. the subsurface tool material of producing by the method for claim 1.