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Drill Collar
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- 产品描述
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Product Information
Drill pipe is a threaded steel tube used to connect drilling rig surface equipment to drilling equipment or bottom hole assembly located at the bottom of the well. Its purpose is to transport drilling mud to the drill bit and, together with the drill bit, raise, lower, or rotate the bottom hole assembly. Drill pipe must be able to withstand enormous internal and external pressures, torsion, bending, and vibration. In the oil and gas extraction and refining process, drill pipe can be reused multiple times.
Features
Core Functions
Power Transmission: Transmits torque and drilling pressure through rotation and tension/compression, driving the drill bit to break up the formation.
Drilling Fluid Delivery: Serves as a mud circulation channel, maintaining wellbore cleanliness and cooling the drill bit.
Load Bearing: Must withstand extreme conditions such as tension, pressure, bending, vibration, and high temperature and pressure.
Structure and Materials
Material Selection:
Steel Drill Pipe: Mature technology, low cost, but high density and energy consumption.
Aluminum Alloy Drill Pipe: Low density (60% less than steel), high specific strength, suitable for deep well drilling, but poor temperature resistance.
Structural Design:Tube Body: Seamless steel pipe, upset and thickened at both ends (internal thickening, external thickening, or internal and external thickening) to enhance connection strength.
Thread Type: Commonly internal flat type, through-hole type, and regular type, affecting drilling fluid flow resistance and outer diameter. Performance Requirements
Strength and Toughness: High tensile and compressive strength and fatigue resistance are required, especially in deep wells where complex stresses due to aspect ratios are necessary.
Abrasion and Corrosion Resistance: Non-magnetic wear-resistant coatings are commonly used to enhance resistance to H2S/CO2 corrosion.
Connection Process: Cold assembly techniques (such as aluminum alloy drill pipes) reduce stress concentration and improve connection reliability.
Stand Size And Thread Connection
Application
Subway construction: Steel supports are used for post-excavation support of foundation pits to prevent soil wall collapse. Common forms include steel arches and steel gratings. Foundation pit retaining structures: Steel support components (such as fixed ends and flexible joints) form a stable frame, suitable for deep foundation pit support under complex geological conditions. Bridges and tunnels: In bridge piers and tunnel segment assembly, steel supports enhance the structural compressive strength, especially under confined water conditions.
About Us
Shijiazhuang Chengsen Co., Ltd. is one of the leading manufacturing group specializing in Steel pipe, steel sheet, steel coil, Steel grating, stainless steel, aluminum series, wire mesh series etc.
CHENGSEN has 90% repeat orders every year. CHENGSEN adheres to the concept of Credit business, Quality assurance, Timely shipment. Adhering to the purpose of strengthening cooperation, promoting exchanges and achieving win-win results, CHENGSEN always adheres to the principle of integrity first and quality first, provides customers with one-stop service, and actively solves the problems and troubles encountered by customers during the ordering process. Chengsen is your trustworthy supplier.
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Drill Collar
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B1213 Global Centre, No.226 Zhonghua North Street, Shijiazhuang, China