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Model Type Drive way applicable size of kelly(in)
Square Hex
HDS Heavy duty Square drive 2 1/2″-6″ 3″-6″
27-HDP Pin drive 2 1/2″-6″ 3″-6″
20-HDP 3″-6″
RTM4 Medium duty Square drive 2 1/2″-5 1/4″ 3″-4 1/4″
RTS4 Light duty 2 1/2″-4 1/4″ 3”-4 1/4″

Roller Kelly Bushings can be classed as two types based on different ways of drive, square drive and pin drive. Also they can be classed as three types based on different style, heavy, medium and light-duty. They are used for 17 1/2 to 49 1/2inch rotary tables. They are designed and manufactured according to API Spec 7K.

Roller Kelly Bushing Drawing

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Please send us your inquiry with detail item description or with Model number. If there is no packing demand we take it as our regular exported standard packing. We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.

We can give you really high quality products with competitive price. We have a better understanding in Chinese market, with us your money will be safe.

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Lake Petro is located in Dongying City, which is famous for Shengli Oilfield and the largest manufacturing hub of petroleum equipment in China. Following the principle of “quality first, science and technology innovated, people oriented”, every Lake Petro person is sparing no effort to provide the customers with best products and services. Our products are based on advanced production line and testing equipment, our products are designed and manufactured according to certification of API, ISO, GOST, etc.