other
HOT PRODUCT
  • Tungsten-Plated Sucker Rod
    Tungsten-Plated Sucker Rod

    ‌RockySea Petro Tungsten-Plated Sucker RodWith the increase of working time, conventional sucker rods are prone to corrosion and eccentric wear during operation, and are not suitable for high-strength or harsh working conditions. To solve the eccentric wear and corrosive problems in oilfields, RockySea Petro developed various anti-corrosion and anti-abrasion products, including tungsten-plated sucker rod.Description Composite plating is to add insoluble particles (such as ceramic particles) to the plat

    VIEW DETAILS
  • RM (ReverseMark) Pumping Unit
    RM (ReverseMark) Pumping Unit

    ‌RockySea Petro RM Pumping UnitUsing AutoCAD, Solid Works computer software to design drawings, using virtual prototype technology to simulate and verify strength.RockySea Petro adopt the principle of combining International Standard, National Standard and User’s view to design.RockySea Petro has passed ISO9001, SO14001 and OHSAS18001 certificate.RM pumping unit is designed on the basis of conventional beam pumping unit, which can change the time of up and down stroke of the pumping unit and is suitable for heav

    VIEW DETAILS
  • Water Injection Wellhead And Christmas Tree
    Water Injection Wellhead And Christmas Tree

    ‌RockySea Petro Water Injection Wellhead And Christmas TreeAccording to casing and well condition, Water Injection Wells can be divided into large casing well, normal well and small diameter well.According to the pipe string structure Water Injection Wells can be divided into support type and suspension type.According to their functions, water Injection wells are divided into stratified injection Wells and general injection wells.In the process of oilfield development, special water injection Wells a

    VIEW DETAILS
  • Produced-Water Oilfield Steam Generator
    Produced-Water Oilfield Steam Generator

    RockySea Petro Produced-Water Oilfield Steam GeneratorIncluding high-dryness Oilfield steam generator, supercritical one-through steam generator, oilfield produced water oilfield heat boiler, all-polished rod oilfield steam injection boiler, desulfurization and denitrification steam injection boiler.According to the different requirements of customers, energy-saving, ultra-high pressure and environmental protection boiler types are designed.RockySea Petro has developed new series of mobile on-board and ski

    VIEW DETAILS
  • Float Collar and Float Shoe
    Float Collar and Float Shoe

    ‌RockySea Petro Float Collar and FloatData sheetAdvantageRockySea has extensive experience in manufacturing float hoops and shoes, and its products have the following advantages.1) The reliable valve body structure reduces the resistance of cement slurry flow.2) All internal accessories are drillable and have the same diameter as the casing.3) The special structural design effectively prevents the backflow of cement slurry.4) The buckle can be processed into BTC/LTC/STC/VAM/FOX/TP-CQ/OTTM accordi

    VIEW DETAILS

Kelly Bar

Date:2024-05-05 Popularity:977

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