Petroleum equipment quality appraisal

petroleum equipment is based on the core principle of synergy between high-pressure and high-temperature environment tolerance and sealing reliability. By optimizing pressure strength, temperature resistance and material corrosion resistance, it achieves safe operations, efficient production and environmental compliance in drilling, oil production and gathering and transportation. It is widely used in fields such as oil and gas field exploration, shale gas development and offshore platform operations. In high-pressure well control, it is used for the rapid shut-off response of the blowout preventer; in fracturing operations, it meets the power output of the 2000 fracturing truck; in the gathering and transportation system, it ensures the anti-corrosion treatment of high-sulfur natural gas. Compared with general equipment, petroleum equipment has features such as adaptability to extreme working conditions, intelligent monitoring, and modular design (quick disassembly and maintenance), and is the core equipment for oil and gas resource development.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide petroleum equipment quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for petroleum equipment quality appraisal.

As the oil and gas mining environment becomes more complex, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: the pressure resistance strength does not meet the standard, and the seal leakage rate exceeds the standard;

2, material defects: the hardness of the sulfur-resistant steel of the wellhead device exceeds the standard, and the graphite content of the sealing ring is insufficient;

3, process problems: hydrogen-induced cracks in welded joints, delayed hydraulic response of the blowout preventer;

4, contract performance disputes: core modules (such as high-pressure valve brand, intelligent diagnostic system version) are inconsistent with the technical agreement.

Quality identification technical methods for petroleum equipment include:

1. Appearance inspection: Check the surface of the equipment for scratches, deformation, rust and other defects.

2. Dimensional measurement: Measure whether the size of the equipment meets the design requirements.

3. Material analysis: analyze the composition and performance of the materials used in the equipment to see if they meet the standard requirements.

4. Performance test: Test whether the performance of the equipment meets the design requirements, including mechanical properties, sealing performance, corrosion resistance, etc.

An oilfield company of the applicant signed a "Sulfur Resistant BOP Procurement Contract" with an equipment manufacturer of the respondent, stipulating that the leakage rate under H₂S operating conditions is ≤0.05mL/h. Wellhead leakage occurred during operation, causing H₂S to escape. The manufacturer argued that it was caused by the operating pressure exceeding the limit.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "petroleum equipment", contract technical agreements, on-site investigation case materials and other data, and made the following quality analysis opinions:

The graphite content of the sealing ring of the petroleum equipment involved in the case is only 8% (agreement ≥ 15%), and the hardness is HRC 25 (agreement ≤ 22); the hydraulic response time of the blowout preventer is 38 seconds (agreement ≤ 15 seconds), and the local corrosion depth of the sealing surface is 0.3mm (agreement ≤ 0.1mm).

The appraisal conclusion determined that defects in materials and control systems were the main cause of the leak.

Petroleum equipment quality appraisal report should include:

1, appraisal purpose (such as safety accident attribution, environmental compliance verification) and reference standards;

2, involved equipment model, material certificate, operation and maintenance records;

3, testing method and equipment list (Such as