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Drilling Kellys Of China - China

price: contact company for price

Hexagonal Kellys

We can manufacture square drill rods and hexagonal drill rods as per requirements of customers. They are made of AISI 4142H- 4145H forged or rolled alloy structural steel. Quenching plus tempering thermal treatment will be conducted over the whole length. Its Brinell hardness can reach 285- 341 on the basis of such thermal treatment. Charpy impact energy:

54J. The formulated process can ensure that the misalignment of the hole reaches the standard wall thickness. Kelly bars are manufactured according to API- 7- 1 Spec.

Kelly Size Length of Drive Section Length Overall Drive Section

m m

Standard LD Optional LD Standard L Optional L Across Flats DFL Across Corners EC Across Corners DCC CC Radius RCC Min. Wall ECC. Boret

76.2 - 3 11280 12190 76.2 85.7 85.73 6.4 42.9 12.1

88.9 ( 3 1/ 2) 11280 12190 88.9 100.8 100 6.4 50 13.3

108 ( 4 1/ 4) 11280 15540 12190 16460 108 122.2 121.44 9.9 60.7 15.9

133.4 ( 5 1/ 4) 11280 15540 12190 16460 133.4 151.6 149.86 9.5 75 15.9

152.4 - 6 11280 15540 12190 16460 152.4 173 173.02 9.5 86.5 15.9

Kelly Size Upper Box Connection Lower Pin Connection Inside

size and style LH Outside Diameter Bevel Diameter Size and Style Outside Length Bevel Diameter Diameter

Diameter LL DF

Length LU Standard DF Optional DF DLR

Dc DU

76.2 - 3 ( 6- 5/ 8) REG ( 4- 1/ 2) REG 196.9 146.1 406.4 186.1 134.5 NC26 85.7 508 82.9 31.8

( 2 3/ 8IF)

88.9 ( 3 1/ 2) ( 6- 5/ 8) REG ( 4- 1/ 2) REG 196.9 146.1 406.4 186.1 134.5 NC31 104.8 508 100.4 44.5

( 2 7/ 8IF)

108 ( 4 1/ 4) ( 6- 5/ 8) REG ( 4- 1/ 2) REG 196.9 146.1 406.4 186.1 134.5 NC38 120.7 508 116.3 57.2

( 3 1/ 2IF)

133.4 ( 5 1/ 4) ( 6- 5/ 8) REG 196.9 406.4 186.1 NC46 158.8 508 145.3 71.4

( 4IF)

133.4 ( 5 1/ 4) ( 6- 5/ 8) REG 196.9 406.4 186.1 NC50 161.9 508 154 71.4

( 4 1/ 2IF)

152.4 - 6 ( 6- 5/ 8) REG 196.9 406.4 186.1 5 1/ 2FH 177.8 508 170.7 82.6

152.4 - 6 ( 6- 5/ 8) REG 196.9 406.4 186.1 NC56 177.8 508 171.1 82.6


Company Contact:


  • Phone: 00865467080020

  • Address: huanghe road, dongying, China

  • Email: Email


Published date: November 14, 2014 -

  • Business Description: Lake Petro company is a professional supplier of various oilfield equipment,including oil drilling and service equipment,oil production equipment,OCTG,wellhead&downhole tools and spare parts with API certification.

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