GB/T 19831.3-2023Petroleum and natural gas industries—Casing centralizers—Part 3:Rigid and semi-rigid centralizers (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document is Part 3 of GB/T 19831 "Casing Centralizer for Oil and Gas Industry". GB/T 19831 has issued the following parts:

---Part 1: Bow spring sleeve centralizer;

---Part 2: Centralizer placement and stop ring testing;

---Part 3: Rigid and semi-rigid centralizers.

Introduction

Casing centralizer is an important cementing tool to ensure the centering of casing and plays an important role in improving cementing quality. GB/T 19831 "Stone Casing Centralizer for Oil and Natural Gas Industry" is planned to consist of three parts.

---Part 1: Bow spring sleeve centralizer. The purpose is to constrain and standardize the product quality of arcuate spring sleeve centralizers.

---Part 2: Centralizer placement and stop ring testing. The purpose is to determine the installation distance of the centralizer on the casing, in order to achieve the best centralizing effect ensures that the casing is centered.

---Part 3: Rigid and semi-rigid centralizers. The purpose is to constrain and regulate the quality of rigid and semi-rigid centralizer products.

This document fully considers the use environment of rigid and semi-rigid centralizers from the well entry process to the completion of cementing, and simulates each use the stress conditions in the environment fully demonstrate the reliability of the product, thereby ensuring the centering of the casing and improving the quality of cementing.

1 Scope

This document specifies the classification and model representation methods, technical requirements, test methods, inspection rules, labelling, packaging and storage.

This document applies to the design and inspection of rigid and semi-rigid centralizers.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without tolerances noted

GB/T 19830 Steel pipes for oil and gas well casing or tubing in the petroleum and natural gas industry

GB/T 19831.1 Oil and gas industry casing centralizers Part 1: Bow spring casing centralizers

GB/T 19831.2 Oil and gas industry cementing equipment Part 2: Centralizer placement and stop ring testing

3 Terms and definitions

The following terms and definitions as defined in GB/T 19831.1 and GB/T 19831.2 apply to this document.

4 Classification and model representation methods