Junk Sub

  • Designed and manufactured according to API spec 7-1.
  • The Junk cup can clean sundries at the bottom of the well.
  • It can improve the service life of drill bit.
  • It operators can get quicker, cleaner scraping jobs.
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Description

During drilling process, Junk sub is applied mainly for fishing of shivers and fallen objects such as carbide tooth, drill bit and bearing which cannot be carried out of hole by conventional fluid circulation, It possesses important functions to keep hole cleaning, increase bit service life, reduce and prevent drill bit from unexpected damage.

Techanical Specification

Type Hole Size Range
(in/mm)
Max. O.D.
(in/mm)
Sub O.D.
(in/mm)
I.D.
(in/mm)
Connection
API
LB127 6 ~ 6-3/9(152.4 ~ 161.9) 5(127) 4-1/2(114.3) 1-1/2(38.1) 3-1/2REG
LB168 7-1/2 ~ 8-1/2(190.5 ~ 215.9) 6-5/8(168) 5-3/4(146) 2-1/4(57.2) 4-1/2REG
LB175 8-5/8 ~ 9-5/8(219 ~ 244.5) 6-57/64(175) 5-3/4(146) 2-1/4(57.2) 4-1/2REG
LB245 11-1/2 ~ 13(292.1 ~ 330.2) 9-5/8(244.5) 8(203.2) 2-13/16(71.4) 6-5/8REG
LB330 14-3/4 ~ 17-1/2(374.7 ~ 444.5) 13(330) 9-1/2(241.3) 3(76.2) 7-5/8REG

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