Quality appraisal of drilling workshop

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drilling rig workshop takes high-strength structural design and working condition adaptability optimization as its core principles. By optimizing explosion-proof material selection, anti-vibration system integration and environmental sealing technology, it achieves the synergy of underground operating safety, operating comfort and equipment stability. It is widely used in harsh working conditions such as mining, tunnel engineering, and oil and gas drilling. In deep well mining, it is used to ensure the high-pressure protection and ventilation safety of drilling rig operators; in tunnel excavation scenarios, it meets the requirements for impact resistance and collapse prevention under complex geological conditions; on oil and gas drilling platforms, it achieves airtight isolation and equipment anti-corrosion in high-temperature and high-pressure environments. Compared with ordinary operation cabins, the drilling rig workshop has the characteristics of high structural strength, up to standard explosion-proof level, and strong environmental sealing. It is the core facility for safety protection of high-risk underground operations.

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

With the upgrade of mine safety standards, there has been a significant increase in quality disputes in drilling and drilling workshops. The judicial dispute focuses on:

1, performance index dispute: whether the compressive strength meets the standard, and the gap between the flameproof joint surfaces exceeds the standard;

2, material defects: the carbon equivalent of the explosion-proof shell Q460C steel exceeds the standard, and the sealing The strip has insufficient aging resistance;

3. Process problems: The grains in the welding heat-affected zone are coarse, and the bubble rate of multi-layer glass for observation windows is >5%;

4. Contract performance dispute: key modules do not match the technical agreement.

0 Such cases need to pass structural load testing, material composition analysis and explosion-proof certification verification to clarify the quality responsibility.

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Drilling and turning workshop quality appraisal technical methods mainly include:

1. Appearance inspection: Check whether the appearance, surface coating, connectors, etc. of the equipment meet the standard requirements and whether there are defects and damage.

2. Dimensional inspection: measure the equipment size, gaps and tolerances, and check with the design drawings to ensure that the equipment dimensions comply with specifications.

3. Performance test: Conduct no-load and full-load operation tests on the hoist, measure performance indicators such as lifting speed, conveying volume, and power consumption, and compare with the contract agreement.

4. Safety inspection: Check whether the protective measures of the equipment are complete and effective, such as protective covers, emergency stop buttons, etc., to ensure the safe operation of the equipment.

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A mining group of the applicant and an equipment manufacturer of the respondent signed an "Explosion-proof Drilling Workshop Procurement Contract", agreeing that the compressive strength is ≥2.0MPa. When the cabin was used underground, the weld seam cracked, causing a gas leakage accident. The manufacturer argued that it was due to illegal overpressure operation.

Identification analysis results:

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

The yield strength of the shell steel of the drilling workshop involved in the case is only 320MPa (agreement Q460C requires ≥460MPa), and the carbon equivalent is 0.53%, which causes welding cold cracks; the gap between the explosion-proof surfaces is 0.25mm (standard ≤0.15mm), and the explosion-proof function is lost; the emergency oxygen supply system has an oxygen storage capacity of only 30 minutes (agreement ≥2 hours).

The appraisal conclusion concluded that the manufacturer failed to control material properties and explosion-proof parameters according to the agreement, and that structural defects were the main cause of the accident.

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Drilling workshop quality appraisal report mainly includes the following contents:

1. Client information

2. Appraisal equipment information

3. Appraisal basis (standards, power of attorney, etc.)

4. Identification method

05. Identification results (including appearance inspection, performance testing, disassembly inspection, material analysis, etc.)

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26. Identification conclusion

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