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Perforating gun barrel and 170ksi steel pipe for preparing perforating gun barrel

A 170ksi, perforating barrel technology, used in manufacturing tools, heat treatment equipment, mining fluids, etc., can solve the problems of small internal space of the barrel, the impact of the penetration depth of the perforating jet, and the inability to install type perforating charges. The effect of improving the penetration depth and broadening the scope of material selection

Pending Publication Date: 2022-01-11
TIANJIN PIPE GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large wall thickness and the small internal space of the barrel, it is impossible to install perforating bullets with large models and high charges, which greatly affects the penetration depth of the perforating jet and limits the transformation of oil layers and the penetration of oil and gas. mining

Method used

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  • Perforating gun barrel and 170ksi steel pipe for preparing perforating gun barrel
  • Perforating gun barrel and 170ksi steel pipe for preparing perforating gun barrel
  • Perforating gun barrel and 170ksi steel pipe for preparing perforating gun barrel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The perforating barrel, the outer diameter of the perforating barrel is 88.9mm, the wall thickness is 9.5mm, and the anti-collapse strength is 227Mpa;

[0036] or,

[0037] The outer diameter of the perforating gun barrel is 114.3mm, the wall thickness is 12.5mm, and the anti-collapse strength is 228Mpa.

[0038] The 170ksi steel pipe used to prepare the above-mentioned perforating gun barrel, the steel pipe includes the following components in mass percentage:

[0039] C: 0.26-0.30%;

[0040] Si: 0.17-0.35%;

[0041] Mn: 0.45-0.55%;

[0042] P≤0.015%;

[0043] S≤0.003%;

[0044] Cr: 0.95-1.10%;

[0045] Mo: 1.00-1.10%;

[0046] V: 0.20-0.25%;

[0047] The rest are Fe and trace residual elements, wherein the trace residual elements can be Cu, Al, O, N, Ni, Ca, and their mass percentages;

[0048] After the steel pipe is heat-treated and tempered during the preparation process, its mechanical performance index is:

[0049] Yield strength: ≥1172MPa;

[0050] Te...

Embodiment 2

[0056] This embodiment provides a 170ksi steel pipe for preparing a perforating gun barrel, and the steel pipe includes the following components in mass percentage:

[0057] C Si mn P S Ni Cr Mo Cu Al Ca V 0.29 0.26 0.47 0.006 0.002 0.04 1.02 1.04 0.07 0.023 0.0009 0.25

[0058] The heat treatment and tempering method of the steel pipe during the preparation process is as follows: quenching temperature is 920°C, heat preservation for 30 minutes, quenching with water, tempering at 660°C for 90 minutes, and the actual properties obtained are as follows:

[0059]

[0060] The structure is tempered sorbite, and the grain grade is 8.5.

[0061] The size of the perforating gun barrel prepared by using the above-mentioned steel pipe is: the outer diameter is 114.3mm, the wall thickness is 12.5mm, and the anti-collapse strength is 228Mpa. According to the target shooting test, when the hole density is 40 holes / m, and the single shot char...

Embodiment 3

[0064] This embodiment provides a 170ksi steel pipe for preparing a perforating gun barrel, and the steel pipe includes the following components in mass percentage:

[0065] C Si mn P S Ni Cr Mo Cu Al Ca V 0.29 0.26 0.47 0.006 0.002 0.04 1.02 1.04 0.07 0.023 0.0009 0.25

[0066] The heat treatment and tempering method of the steel pipe during the preparation process is as follows: the quenching temperature is 920°C, heat preservation for 30 minutes, quenching with water, and tempering at 660°C for 90 minutes. The actual properties obtained are as follows:

[0067]

[0068] The structure is tempered sorbite, and the grain grade is 8.5.

[0069] The size of the perforating gun barrel prepared by using the above-mentioned steel pipe is: the outer diameter is 88.9mm, the wall thickness is 9.5mm, and the anti-collapse strength is 227Mpa; through the target shooting test, the hole density is 60 holes / m, and the single shot When the amoun...

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Abstract

The invention relates to a perforating gun barrel. The outer diameter of the perforating gun barrel is 88.9 mm, the wall thickness is 9.5 mm, and the collapse-resistant strength is 227 Mpa; or the outer diameter of the perforating gun barrel is 114.3 mm, the wall thickness is 12.5 mm, and the collapse-resistant strength is 228 Mpa. A 170ksi steel pipe for preparing the perforating gun barrel comprises the following components in percentage by mass: 0.26-0.30% of C, 0.17-0.35% of Si, 0.45-0.55% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.95-1.10% of Cr, 1.00-1.10% of Mo, 0.20-0.25% of V, and the balance of Fe and residual elements. The perforating gun barrel is suitable for high-temperature and high-pressure environments, and the requirements of high penetration depth and high hole density of oil layer perforation are met.

Description

technical field [0001] The invention belongs to the technical field of perforating guns for oilfield development, in particular to perforating gun barrels and 170ksi steel pipes used for preparing the perforating gun barrels. Background technique [0002] Deep wells and ultra-deep wells are characterized by well depth, high temperature and high pressure. They are one of the most severe well conditions for perforating guns. When the well depth reaches 7000-8000 meters, the bottom hole temperature is basically above 220°C-250°C, More than 160MPa. During the operation of the perforating gun, the rupture, fracture, and collapse of the pipe body will cause the gun body to fall and get stuck in the well, resulting in extremely serious construction accidents. Therefore, the safety factor of the perforating gun is required to be high. The strength, toughness, high temperature performance, and anti-collapse performance of the gun barrel also put forward extremely high requirements. ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C21D9/14C21D1/18E21B43/119E21B43/116
CPCC22C38/02C22C38/04C22C38/22C22C38/24C21D9/085C21D9/14C21D1/18E21B43/119E21B43/116C21D2211/009
Inventor 吴亮亮张哲平周家祥张旭吴永超安盛岳
Owner TIANJIN PIPE GROUP CORP
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