+33 3 73 58 00 26
sales@command-smfi.com
5 rue des Guerins, 58200 Cosne Sur Loire, France
  • HOME
  • ABOUT US
    • COMMAND-SMFI
    • QUALITY
      • QHSE POLICY
      • CERTIFICATES
  • DRILLING
      • APPLICATIONS
      • ONSHORE
      • OFFSHORE
      • GEOTHERMAL

      • OTHER
      • HDD
      • CORING
        • PRODUCT LINES
        • DRILL PIPES
        • HEAVY WEIGHT DP
        • DRILL COLLARS
        • SUBSTITUTES
        • PUP JOINTS
        • STABILIZERS
          • SAFETY VALVES
          • KELLY COCK
          • IBOP
          • RDCV
        • MACHINING
          • MACHINING CAPABILITIES
          • SPECIFIC SKILLS
        • STOCK
        • NEWS
        • CONTACT US

        DRILL COLLARS

        1. HOME
        2. DRILLING
        3. PRODUCT LINES
        4. DRILL COLLARS
        COMMAND-SMFI drill collars are thick-walled tubulars machined from solid steel bars and manufactured to specifications to meet and/or exceed API or NS-1 requirements. The quality of the heat treatment is critical in the production of raw materials and must be uniform and deep enough through the thickness of the bar to ensure the mechanical properties.

        Drill collars are used as a component of the bottom-hole assembly (BHA) and provide the following:
        • Drilling weight-on-bit (WOB)
        • BHA directional control
        • Hole size integrity
        • Stiffness to maintain hole straightness
        • Clearance for the drill string
        • Compressive and torsional loads
        • Mitigate differential sticking and stuck pipe thanks to spiraled grooves

        DRILL COLLARS Table data

        • slide
        • slide
        • slide

        Product Performance

        Drill collars come in slick and spiral-grooved designs with additional features for safe surface-handling and trouble-free operations. We provide the full range of collars manufactured in AISI 4145H-modified steel with mechanical properties guaranteed 1 inch below steel surface at ambient temperature.

        Product range and features

        Standard:
        • ODs from 2-7/8” to 11”
        • API 7.1 & 7.2 specifications
        • Slick or spiraled
        • API & H90 connections
        • Fatigue resistance features (threads cold rolled, API pin stress relief groove, and API box bore-back)
        • Range 2 and 3 lengths
        • Phosphate coated threads
        • Slip and elevator recess
        • Pressed steel thread protectors
        • A variety of steel grades: API, Sour Service, NS1, Low Temp, Non Magnetic
        Options:
        • Hardbanding
        • Internal plastic coating for OD <6 1/2”
        • High-performance double shoulder connections upon request
        • Customized elevator and slip recess
        • NS-1 or DS-1 or customers specifications
        • Make and Break

        Spiral Design + Slip & Elevator Recess

        Spiral Design:

        In order to reduce differential pressure sticking and wellbore contact, the surface of Drill Collars can be spiral-grooved. Spiral Drill Collars are the perfect solution for deep, directional or deviated drilling. Cross sections of the drill collars reduce the contact area with the wall of the hole.

        Slip & Elevator Recess:

        Slip and elevator recesses improve handling efficiency and safety. These features are machined in accordance with API standard RP7G. The upper radius of the elevator recess is cold rolled to increase the product service life. Slip and elevator recesses can be manufactured together or separately.

        Drill Collar Material Table

        ConnectionAPINS1NS1DS1 common / DS1 critical
        APIAllOD < 9 1/2”OD >= 9 1/2”All
        4145H-modified4145H-modified4145H-modified4145H-modified
        110 KSI110 KSI100 KSI110 KSI / 120 KSI

        ConnectionSour ServiceSour ServiceSour ServiceSour Service
        API<= 6 3/4” OD> 6 3/4” OD<= 6 3/4” OD> 6 3/4” OD
        (with NACE test 45% SMYS)(with NACE test 45% SMYS)(No NACE test)(No NACE test)
        (45% SMYS guaranteed)(45% SMYS guaranteed)
        ASCOWELL CASCOWELL CASCOWELL CASCOWELL C
        110 KSI100 KSI110 KSI100 KSI

        Hardbanding (flush or raised)


        Type B hardbanding is recommended on drill collars with slip and elevator recesses and is applied in a 4” long wear pad above the elevator recess, a 1” long wear pad above the slip recess and a 10” long wear pad under the slip recess. For drill collars with a slip recess only, type C hardbanding is applied to a 10” long wear pad under the slip recess and a 4” long wear pad above the slip recess. For drill collars without any recess, type A hardbanding is applied in a 10” long wear pad located 30” from the end of the pin.


        Operational Benefits

        COMMAND-SMFI has been producing high quality drill collars for over 60 years and we were the first company to manufacture small diameter drill collars from solid bars. Bars are trepanned in-house using specialty equipment to guarantee product performance and reliability. Our experience in material specification,mechanical properties, heat treatment, machining connections, and inspection are reflected in our product performance.
        Drill Collar Manufcaturing Flow Chart
        DRILL PIPES
        HWDP
        SUBSTITUTES
        PUP JOINTS
        VALVES
        STABILIZERS

        5 rue des Guerins, 58200 Cosne Sur Loire, France

        sales@command-smfi.com+33 3 73 58 00 26

        For complete information on our products, download our catalog:

        Download
        © 2020 COMMAND-SMFI
        This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish.
        Accept Reject
        Privacy & Cookies Policy

        Privacy Overview

        This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
        Necessary
        Toujours activé
        Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
        Non-necessary
        Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
        Enregistrer & appliquer