Casing Pipe
Core Equipment: Sulfur-resistant alloy casing body, low-temperature weather-resistant casing, threaded joints (API standard), casing couplings, sealing rings, centralizers, hangers, oil well special cement slurry, thread detectors.
Core Technologies: High-strength alloy material smelting technology, casing thread precision machining technology, sulfur and corrosion resistant surface treatment technology, low-temperature weather-resistant material modification technology, casing sealed connection technology, cementing slurry formula technology, casing running and centering technology.
Product Introduction
Casing Pipe is a core pipe material for oil drilling engineering. It is mainly run into the drilling wellbore to support the well wall, isolate different formations, prevent well wall collapse and formation fluid channeling, and provide channels for oil and gas exploitation. It is widely used in the whole process of oil and gas drilling, completion, workover and long-term production of oil and gas wells, and is a key equipment to ensure the safe and stable operation of oil and gas wells.
Types and Characteristics of Equipment
Type
Oil Special Casing Pipe: Suitable for various oil and gas wells (shallow wells, medium-deep wells, deep wells, ultra-deep wells), it features high pressure resistance, corrosion resistance and high strength. Customized specifications according to drilling depth and working conditions, it can realize multiple functions such as formation isolation, well wall support and fluid control, adapt to extreme drilling and production conditions such as high temperature, high sulfur, salinization and extreme cold, and is a core essential pipe material for oil and gas well completion.
Features
Features Complete specifications, classified by steel grade, caliber and wall thickness, adapting to different well depths, formation pressures and working condition requirements. High strength and toughness, able to bear high pressure, impact and formation extrusion load during drilling and production. Corrosion and wear resistance, adapting to extreme service environments such as high sulfur, saltwater mud and extreme cold. Reliable connection and sealing, adopting thread connection to prevent formation fluid channeling and ensure wellbore integrity. Customizable processing, adjusting material and structure according to formation characteristics to adapt to complex drilling scenarios.
Casing Pipe
Casing pipe is a steel pipe used to line oil and gas wells for wall support.
It prevents wellbore collapse and isolates formation fluids.
Casing Pipe
It ensures safe drilling and stable production in oil and gas fields.
Basic Principles and System Composition
Basic Working Principle
After the drilling reaches the designed depth, casing pipes of different specifications are run into the wellbore section by section from large to small, and each section of casing is connected into a whole through thread connection. Then cement slurry is injected into the annular space between the casing and the well wall. After the cement slurry solidifies, a cement sheath is formed to realize the firm combination of the casing and the well wall; the high strength of the casing is used to support the well wall to prevent well wall collapse, and at the same time, through the double isolation of the casing and the cement sheath, formations with different pressures and properties are separated to avoid formation fluid channeling, providing a safe and stable channel for subsequent oil and gas exploitation.
Overall System Composition
Casing Main Body Unit: The core bearing and isolation component, including basic structures such as casing bodies of different steel grades and calibers, and casing joints (threaded joints, welded joints). Connection and Sealing Unit: Including thread sealant, sealing ring and coupling, realizing sealed connection between casings and preventing fluid channeling. Cement Sheath Unit: Including oil well special cement slurry and cement additives, filling the gap between the casing and the well wall to realize formation isolation and casing fixation. Auxiliary Reinforcement Unit: Including centralizers, hangers and packers, ensuring the casing is run in the center and firmly hung, and improving the sealing and isolation effect. Supporting Auxiliary Unit: Including casing centralizing tools, thread detectors and cement slurry mixing equipment, ensuring the smooth progress of casing running, connection and cementing operations.
Basic Principles and System Composition
Pre-operation Preparation: Determine the well type, well depth and formation working conditions, select casing with suitable steel grade and caliber, and inspect the quality and performance of the casing body, threads and joints. On-site Preparation: Clean impurities on the casing surface, apply thread sealant, assemble casing joints and couplings, and commission casing running tools and centralizing equipment. Casing Running: Run the casing section by section according to the designed sequence, fasten each section of casing through thread connection, use centralizers to ensure the casing is centered, and monitor the running resistance in real time. Cementing Operation: Inject cement slurry into the annular space between the casing and the well wall, monitor the cement slurry injection volume and pressure, and ensure the cement slurry is fully filled and well solidified. Post-operation Detection: After the cement slurry solidifies, detect the casing sealing performance and cement sheath quality, evaluate the wellbore integrity, and enter the subsequent drilling or production process after passing the test.
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