other
HOT PRODUCT
  • Downhole Pump Fittings
    Downhole Pump Fittings

    ‌RockySea Petro Downhole Pump FittingsWe establishes cooperative relationships with international customers such as Shell, GE, Schlumberger, and JOHN CRANE.Exported to the United States, Europe, Asia and Asia,The standard parts of the sucker rod pump produced by our company are well-selected, precision-made, stable in quality and excellent in performance, .Your Premier Downhole Pump Fittings Manufacturers And Suppliers.Valve Rods Valve rod materials include steel, alloy steel, stainless steel and bra

    VIEW DETAILS
  • Downhole Tools
    Downhole Tools

    ‌RockySea Petro Downhole ToolsDownhole Tools are essential equipment used in the oil and gas drilling and production processes. They are designed to withstand the harsh conditions encountered in the downhole environment, including high temperatures, pressures, and corrosive fluids. Downhole Tools perform a variety of functions that are crucial to the success of the drilling and production operations. Some tools are used to measure and monitor downhole conditions, such as pressure, temperature, a

    VIEW DETAILS
  • Hydril Annular BOP
    Hydril Annular BOP

    ‌RockySea Petro Hydril Annular BOPThe Hydril Annular BOP has carried out rigorous tests, such as magnetic particle, ultrasonic, pressure test and and so on.Do the pressure analysis to pressured and forced parts with 3D software to check the strength of Hydril Annular Blowout Preventer.RockySea Petro Petro designs various types of Hydril Annular BOP according to the International standard.RockySea Petro Petro has more than 20 years of experience in oil wellhead and Hydril Annular BOP production, with advanced manuf

    VIEW DETAILS
  • Deep Well Oil Well Pump
    Deep Well Oil Well Pump

    ‌RockySea Petro Deep Well Oil Well PumpWhen the pump barrel is stretched and deformed, the pump plunger will not be running smoothly, and even the barrel may trip or break;The valve may be damaged and invalidThe valve cage may break and fail;RockySea Petro developed a lot of special oil well pumps to solve the above problems, including a suspension pump, bridge-type pump, solid plunger pump, etc.The oil well pump efficiency may be reduced to less than 30%Your Premier Deep Well Oil Well Pump Manufacturers An

    VIEW DETAILS
  • Self-tensioning guy-wire Workover rig
    Self-tensioning guy-wire Workover rig

    ‌RockySea Petro Self-Tensioning Guy-Wire Workover RigFeaturesA workover rig with guy-line is a double drum workover rig that installs wind loaded guy-wires on the main engine.There is no need to install wind loaded guy-wires with ground anchors, which greatly improves the efficiency of workover operations, reduces operating costs and labor intensity.Also it has features as the following:(1) Suitable for small well site operations, reducing the operation area of the entire workover rig.(2) All te

    VIEW DETAILS

Non-Magnetic Drill Collar

Date:2024-05-05 Popularity:800

RockySea Petro Non-Magnetic Drill Collar

The non-magnetic drill collar is made of low chromium manganese alloy steel, which is forged through strict chemical composition analysis. All  non-magnetic drill collars produced from RockySea Petro have been tested for mechanical properties to ensure that their hardness, toughness, impact value and corrosion resistance meet the standards, with good low magnetic permeability and good machining performance.


Description  

The structure of non-magnetic drill collars is the same as that of ordinary drill collars, but their chemical composition and mechanical properties are different from those of ordinary drill collars. Nonmagnetic drill collar is a kind of drilling tool with special functions in directional well engineering. When the magnetic inclinometer is used to measure the inclination and azimuth of the borehole in directional wells, in order to protect the compass from the magnetic field of the drill string, a certain length of non-magnetic drill collar must be equipped in the drill string, so that the magnetic inclinometer can be located at a suitable position in the non-magnetic drill collar to measure the inclination, otherwise the correct measurement results cannot be obtained.



The non-magnetic drill collar manufactured from RockySea Petro is made of stainless alloy steel with low magnetic permeability, and the cross-section of the pipe body is round.


Feature 

  • Elevator and slip recesses
  • Flexing: An optional outside profile can be machined to reduce the collar rigidity if required.

  • Internal bore treatment: This option generates a compression level of at least 60,000 PSI at a given depth. This provides the collar with an excellent resistance to stress corrosion cracking.

  • Pin stress relief groove and box boreback: An pin stress relief can be used on all drill collars and downhole tools. It is a recommended option in situations where fatigue can occur as a result of bending. By removing unengaged threads in the high stress areas of the drill collar connection, it is less likely to crack due to fatigue because the bending will take place in the area of the connection with smooth surfaces that are free of stress concentrations.

Optional slip and elevator recesses are available to improve handling and safety. These two features can be used together or separately.


Data Sheet

Parameters

Permeability (magnetic field strength = 1 × 105/4πNm) :

Maximum value: 1.010, average value: μ r≤1.005

Magnetic field gradient: (hot spot) maximum value: B ≤ 0.05

OD rangeYield strengthTensile strengthElongationHardnessCharpy impact energy
mminMPaMPa%HBJ
79.4~171.43 1/8~6 3/4≥758≥827≥18NANA
177.8~279.47~11≥689≥758≥20NANA


RockySea Petro Copyright © 2008-2025 Inc. SITEMAP