Drilling jars

Drilling jars

Model No: API certificate
Name: Drilling jars
Application: land and offshore wells
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  • Description
  • Specifications
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During drilling operations, due to complex geological structures, such as well wall collapse, plastic flow and squeezing of the formation in the open hole, and improper technical measures, such as long pump stop time, bit mud packs, etc., drilling tools often get stuck. Shock sub is one of the effective tools to eliminate stuck accidents.

Our company can provide while-drilling jar (composed of a hydraulic top jar and a mechanical dumper jar), mechanical while-drilling jar, hydraulic while-drilling jar, mechanical and hydraulic integrated while-drilling jar, super drilling jars, hydraulic top jar, and surface jar, etc.

Model ZSJ94B ZSJ90B ZSJ80B ZSJ76B ZSJ70B ZSJ66B ZSJ64B ZSJ62B ZSJ56B ZSJ46B
O.D.(mm) 9-1/2 9 8 7-3/4 7 6-3/4 6-1/2 6-1/4 5-3/4 4-3/4
  241 229 203 197 178 172 165 160 146 121
I.D.(mm) 3， 3 2-13/16 2-13/16 2-3/4 2-1/2 2-1/4 2-1/4 2-1/4 1-27/32
  76 76 71.4 71.4 70 63.5 57 57 57 47
(mm)
Upward stroke		 13-1/2 13-1/2 14-1/2 14-1/2 13-1/2 13-1/2 13-1/2 13-1/2 13 13-1/2
  343 343 368 368 344 344 344 344 332 305
(mm)
Downward stroke		 10 10 7-1/8 7-1/8 7 7 7 7 7-1/8 7
  254 254 181 181 178 178 178 178 180 178
Connection 7-5/8REG 7 6 6 NC50 NC50 NC50 NC46 4-1/2FH NC38
(KN)
Max. pull force		 2800 2800 2500 2500 2300 2200 2200 2200 2000 1400
Allowed working torque 22 22 20 18 15 15 15 15 15 13
Norminal upward releasing force 500~700 500~700 400~600 400~600 350~550 350~550 300~450 300~450 200~350 150~250
Max. upward releasing force 1000 1000 750 750 700 700 550 550 450 270
Max. downward releasing force 650 650 600 600 550 550 500 500 400 250
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