Steel casing is mainly used to support the well walls of oil, gas and water wells. It is an important guarantee for the normal operation of oil, gas and water wells after drilling and completion. Due to factors such as casing purchase, quality, transportation, storage, and use, casing damage sometimes occurs. , causing oil and gas wells to reduce production or even be scrapped, causing significant economic losses to oil and gas field companies. The following is an analysis of the key points of quality control in the purchase and production stages of petroleum casing.
1.Steel casing purchase
According to the exploration and development deployment and drilling plan, the user needs to formulate a demand plan in advance, including type, steel grade, buckle type, wall thickness, length range, weight, quantity and special requirements, such as specification grade, thread grease model, thread protector type , raw material manufacturers, etc.
The key control points are as follows.
(1) Clarify the pipe type, steel grade, thread type, wall thickness, length range, weight, quantity and special requirements.
(2) Clarify casing standards, such as API standards, national standards, industry standards, enterprise standards, etc. Relatively speaking, API standard requirements are relatively loose, and each standard is different in subtle ways. When filling in the ordering conditions, it must be clear standard. API pipes are usually used. If they belong to an enterprise affiliated to PetroChina and other units, they must also meet the company standards of the group.
(3) Check the supplier's sales performance, quality and service of similar products in the past three years to see if there are any bad records.
(4) Clarify pipe quality inspection methods, implementation standards, inspection items, judgment criteria and other matters.
(5) The procurement review committee recommends that technical personnel from the user unit, testing agency, purchasing department and relevant departments participate. If necessary, technical personnel from drilling and other operating units may be invited to participate. With full consideration of quality, choose manufacturers with reasonable prices.
(6) Purchase strictly in accordance with prescribed procedures and requirements.
2.Steel casing production
After confirming the supplier, if the quantity is uncertain, the user should issue a purchase order in advance based on the demand and specify the delivery period and location.
The key control points are as follows.
(1) Carry out factory-based manufacturing supervision in accordance with regulations, select a qualified and skilled manufacturing supervision team, and if necessary, arrange for additional personnel to stand by for supervision.
(2) If the manufacturer is a pipe thread processing factory, it needs to pay more strict attention to its quality assurance capabilities, focusing on supervising whether its CNC lathes, pressure testing equipment, flaw detection equipment, testing equipment, spray paint packaging and other equipment are complete and intact, and whether the relevant data are Accurate and reliable; focus on checking the procurement channels, quality, material performance, test reports, etc. of the light tubes. If necessary, send personnel to the raw material manufacturing enterprises to perform factory supervision to ensure that the performance of the light tubes meets the requirements.
(3) Strengthen the supervision of the factory-based manufacturing supervision service units, review their unit and individual qualifications and performance, and go to the site from time to time to inspect the work of the manufacturing supervision unit, such as staffing, technical level, completeness and traceability of records sex. For important projects, it is recommended that professional third-party testing agencies perform factory-based supervision.
(4) For important processes such as physical and chemical testing, non-destructive testing, hydraulic testing, pipe thread processing, diameter, etc., set them as key control points for manufacturing supervision and reflect the relevant content in the formal manufacturing supervision report submitted.
(5) Pipes leaving the factory must be signed and approved by the factory-based manufacturing supervisor, who must also supervise loading and shipping. A formal and compliant manufacturing supervision report must be issued on the results of the supervision and must be legally binding. After the pipes enter the warehouse, they can only be used after passing the product quality inspection by a third-party testing agency.
1.Steel casing purchase
According to the exploration and development deployment and drilling plan, the user needs to formulate a demand plan in advance, including type, steel grade, buckle type, wall thickness, length range, weight, quantity and special requirements, such as specification grade, thread grease model, thread protector type , raw material manufacturers, etc.
The key control points are as follows.
(1) Clarify the pipe type, steel grade, thread type, wall thickness, length range, weight, quantity and special requirements.
(2) Clarify casing standards, such as API standards, national standards, industry standards, enterprise standards, etc. Relatively speaking, API standard requirements are relatively loose, and each standard is different in subtle ways. When filling in the ordering conditions, it must be clear standard. API pipes are usually used. If they belong to an enterprise affiliated to PetroChina and other units, they must also meet the company standards of the group.
(3) Check the supplier's sales performance, quality and service of similar products in the past three years to see if there are any bad records.
(4) Clarify pipe quality inspection methods, implementation standards, inspection items, judgment criteria and other matters.
(5) The procurement review committee recommends that technical personnel from the user unit, testing agency, purchasing department and relevant departments participate. If necessary, technical personnel from drilling and other operating units may be invited to participate. With full consideration of quality, choose manufacturers with reasonable prices.
(6) Purchase strictly in accordance with prescribed procedures and requirements.
2.Steel casing production
After confirming the supplier, if the quantity is uncertain, the user should issue a purchase order in advance based on the demand and specify the delivery period and location.
The key control points are as follows.
(1) Carry out factory-based manufacturing supervision in accordance with regulations, select a qualified and skilled manufacturing supervision team, and if necessary, arrange for additional personnel to stand by for supervision.
(2) If the manufacturer is a pipe thread processing factory, it needs to pay more strict attention to its quality assurance capabilities, focusing on supervising whether its CNC lathes, pressure testing equipment, flaw detection equipment, testing equipment, spray paint packaging and other equipment are complete and intact, and whether the relevant data are Accurate and reliable; focus on checking the procurement channels, quality, material performance, test reports, etc. of the light tubes. If necessary, send personnel to the raw material manufacturing enterprises to perform factory supervision to ensure that the performance of the light tubes meets the requirements.
(3) Strengthen the supervision of the factory-based manufacturing supervision service units, review their unit and individual qualifications and performance, and go to the site from time to time to inspect the work of the manufacturing supervision unit, such as staffing, technical level, completeness and traceability of records sex. For important projects, it is recommended that professional third-party testing agencies perform factory-based supervision.
(4) For important processes such as physical and chemical testing, non-destructive testing, hydraulic testing, pipe thread processing, diameter, etc., set them as key control points for manufacturing supervision and reflect the relevant content in the formal manufacturing supervision report submitted.
(5) Pipes leaving the factory must be signed and approved by the factory-based manufacturing supervisor, who must also supervise loading and shipping. A formal and compliant manufacturing supervision report must be issued on the results of the supervision and must be legally binding. After the pipes enter the warehouse, they can only be used after passing the product quality inspection by a third-party testing agency.
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