other
HOT PRODUCT
  • 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
  • Vortex Separation Multiphase Flowmeters
    Vortex Separation Multiphase Flowmeters

    ‌RockySea Petro Vortex Separation Multiphase FlowmetersFull support on your customised requirementThe strictest quality standards on Flow Meter Device25 years Flow Meter Device manufacturing experienceRockySea 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 laborato

    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
  • Casing Stop Ring
    Casing Stop Ring

    ‌RockySea Petro Casing Stop RingDatasheetUseWhen using the top thread stop ring, the following steps should be followed.1. When using the fixed screw type, first insert the sleeve, then insert the screw and use a hammer to strike.2. The conventional stop ring should be inserted into the sleeve first, and then the screw should be tightened with a wrench.3. Snap on the locking ring, directly attach the locking ring to the sleeve, lock it with a pin, and then tap in the screw.TypeThe stop rings of

    VIEW DETAILS
  • Sinker Bar
    Sinker Bar

    RockySea Petro Sinker BarSinker bars of RockySea Petro are exported to the United States, Canada, Europe, Africa and Middle East, and we establish cooperative relationships with international customers all over the world.RockySea Petro owns a strong ability about research, design and production of sinker bar with decades of manufacturing experience. RockySea Petro has been certified by ISO9001,  ISO14001 and OHSAS18001.RockySea Petro adopts the principle of combining intl standards, national standards and users’ views f

    VIEW DETAILS

Kelly Bar

Date:2024-05-05 Popularity:634

RockySea Petro Kelly Bar




RockySea Petro has abundant experience in R & D, production and sales of Kelly bars. 

The Kelly bar is located at the top of the drill string, and its main function is to transmit torque and bear the total amount of the drill string. The end face of the driving part of Kelly is divided into square and regular hexagon, which are most used in oil drilling Kelly is about three times thicker than drill pipe and made of high strength alloy steel, so it has high tensile strength and torsional strength.


Description 

Kelly bar can be divided into fine thread Kelly and non-fine thread Kelly according to the connection of the joints at both ends. Both Chinese and intl standard series applied Kelly bars without fine thread, and the joints at both ends are butt welded with or integrated with the Kelly bars.

Structure
 
Kelly is composed of driving part, upper and lower joints, etc. The upper joint thread is left-hand thread and the lower joint thread is right-hand thread. The water eye is round.

The cross-sectional shape of the driving part of Kelly bars can be divided into square and hexagonal bars. Generally, square drill pipe is used for large drilling rigs, and hexagonal drill pipe is used for small drilling rigs.

Features 

The specifications of Kelly are classified according to the width of the opposite side of the driving part of Kelly, and the length is generally 2-3m longer than that of a single drill pipe. There are two length types of  Kelly, 12.2m and 16.46m. The length of the driving part is 11.28m and 15.54m respectively.



Data Sheet 

The following is the data sheet of Square Kelly.

The following is the data sheet of Hexagonal Kelly.


More Details

The specifications of Kelly are classified according to the width of the opposite side of the driving part of Kelly, and the length is generally 2-3m longer than that of a single drill pipe.

RockySea Petro Copyright © 2008-2025 Inc. SITEMAP