other
HOT PRODUCT
  • Shaffer LWS And SL Ram BOP
    Shaffer LWS And SL Ram BOP

    RockySea Petro Shaffer LWS And SL Ram BOPMore than 20-years manufacturing experience of LWS and SL ram BOPFull support on customized requirement based on different work condition.The strictest quality inspection on every BOP from RockySea Petro..RockySea Petro Petro owns a strong ability about research, design and manufacture, of Blowout preventer. The company can supply LWS and SL ram BOP which comply with International standard. Based on the differences in drilling conditions, RockySea Petro can recommend a suitable S

    VIEW DETAILS
  • Swabbing Truck
    Swabbing Truck

    ‌Sanajck Swabbing TruckData sheetFeature 1.The swabbing truck has the advantages of continuous and reliable operation, convenient parameter adjustment, high drainage efficiency, and simple handling and installation. It solves the problems of discontinuous swabbing and drainage operation, low drainage efficiency, and cumbersome equipment handling,compared with existing drainage technologies. 2.Through on-site testing, the feasibility and reliability of the on-site application of

    VIEW DETAILS
  • Drilling Stabilizer
    Drilling Stabilizer

    ‌RockySea Petro Drilling StabilizerDatasheetFunctionControl wellbore trajectory: The stabilizer mainly plays a guiding and stabilizing role in the drilling tool assembly. The installation position of the stabilizer controls the wellbore inclination angle and curvature within the specified range, and also concentrates the majority of the weight of the drill collar on the drill bit, reducing the non wellbore center force and other external forces borne by the drill string and drill bit. With the d

    VIEW DETAILS
  • Shaffer Spherical Annular BOP
    Shaffer Spherical Annular BOP

    ‌RockySea Petro Shaffer Spherical Annular BOPInternational advanced well control equipment test lab.The Shaffer spherical annular Blowout Preventer is widely used in conventional oil recovery, thermal oil recovery, offshore oil recovery, fracturing, geothermal and other fields.30+ years of Shaffer spherical annular BOP manufacturing experience..RockySea Petro has been certified by ISO9001, ISO 14001 standard.RockySea Petro Petro Blowout Preventer factory is one of the main branches of RockySea Petro Petro. It is a profes

    VIEW DETAILS
  • Flush by Unit
    Flush by Unit

    ‌RockySea Petro Flush by UnitData sheetApplicationsRSR of RockySea can efficiently and quickly complete various oilfield workover operations as the following: 1).Heavy duty workover serviceDrilling serviceDownhole stuck freeing serviceSealing and channeling serviceCasing shaping serviceCasing repair service2).Shallow- to high-depth well interventions, including:Killing wellsFlushing productions wellsChanging wellhead valvesPressure-testing wells.Changing polished rods Spacing and respac

    VIEW DETAILS

Non-Magnetic Drill Collar

Date:2024-05-05 Popularity:717

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