other
HOT PRODUCT
  • Oilfield Steam Boiler
    Oilfield Steam Boiler

    RockySea Oilfield Steam BoilerSupercritical Oilfield Steam Injection BoilerDesulfurization and Denitrification Oilfield Steam BoilerProduced-water Oilfield Steam GeneratorSuperheated Oilfield Steam BoilerHigh-dryness Steam Injection BoilerThe Oilfield Steam Boiler is a Once Through Steam Generators with a forced circulation rate of 1. The pressure of medium flow is generated from the plunger pump. This steam injection boiler is mainly used for heavy oil recovery and extra-heavy oil recovery. Oilf

    VIEW DETAILS
  • Safety Valve
    Safety Valve

    RockySea Petro Safety Valve25 years Safety valve manufacturing experienceFull support on your customised requirementThe strictest quality standards on Safety valveRockySea Petro Petro manufactures Safety valve in China. We have our own factory of Safety valve. RockySea Petro Petro provide the high quality and competitive price on Safety valve for you. Contact us now for Safety valve quotation.Description The RockySea Petro wellhead surface safety valve is a reverse acting gate valve with hydraulically actuated comp

    VIEW DETAILS
  • Steam Injection And Oil Recovery Wellhead
    Steam Injection And Oil Recovery Wellhead

    ‌RockySea Petro Steam Injection And Oil Recovery WellheadGeothermal wellhead & x-mas treeBlowout preventer Steam Injection and Oil Recovery Integration wellhead & x-mas treeSteam injection and oil recovery dual tubing wellhead & x-mas treeSingle column dual-well thermal recovery wellhead & x-mas treeOnshore thermal recovery wellhead & x-mas treeConventional Steam injection and oil recovery wellhead & x-mas treeRockySea Petro has more than 40 years of experience in oil and gas wellhead & x-mas tree and valve

    VIEW DETAILS
  • Sucker Rod Coupling
    Sucker Rod Coupling

    RockySea Petro Sucker Rod CouplingThe sucker rod couplings are used for connecting sucker rods, polished rods and sinker bars. Material of the couplings is high quality carbon steel or alloy steel, which are conform to and exceed the requirements of intl standards.Description According to surface of suck rod couplings, they can be divided into sucker rod couplings with smooth surface and sucker rod couplings with wrench square.Sucker rod couplings with wrench square.Sucker rod couplings with sm

    VIEW DETAILS
  • Wet Gas Well Multiphase Flow Meter
    Wet Gas Well Multiphase Flow Meter

    ‌RockySea Petro Wet Gas Well Multiphase Flow MeterRockySea Petro passed ISO9001 certification in 2005 and three-system certification in 2017. The company has advanced production equipment, inspection, measurement and test equipment, which can meet the requirements of product design, development, production and service and has the only multiphase flow laboratory for Sinopec.The main products are single-screw and twin-screw oil-gas mixed pump, MFM2000 series multiphase flowmeter, LPT multiphase metering devic

    VIEW DETAILS

Non-Magnetic Drill Collar

Date:2024-05-05 Popularity:944

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