HJ Assembling roller bits
1.Quality Warranty.
In order to defend the legitimate interests between the customers and
manufacturers in accordance with the "The Product Quality Law of
People's Republic of China,"Hejian Hengji Bit Manufacture C o.,
Ltd(hereinafter referred to as Hengji)---the manufacturer warrants its
customers as follows:
Hengji warrants:
1.Bits manufactured by the company conform to the standard of
American Petroleum Institute,API Spec7-1 and the standards of Oil
and Gas Industry of SY/T5164 and my company.
2.Liabilities under this warranty is limited to the replacement of or
credit for defects prior to sale and have been checked and admitted by
Hengji.
3.Since Hengji is not able to control over the bits in the market and
being used,nor able to predict the complexity of working condition in
the well and any changes to the drilling operations,we are not to
warrant that the bits sold accomplish any particular results or suitable
for a particular purpose,nor that bits used in normal conditions,Hengji
shall not take any responsibility for the defects to the products and
losses to the customers incurred due to the following causes:
a.Damaged by rough handling or improper storage.
b.Bits and its parts damaged due to improper handling and storage by
the customer,and bits failed due to the expired date(aging and
deterioration of the rubber and lubricant).
c.Bits reused after its first user and being repaired.
d.Failure to follow the description of the applicable
formation,recommended parameters,operating requirements and
cautions in the "Operation Instructions"
e.Bit structures changed and non-standard bit parts used by the
customer,e.g.nozzle plugged and extended nozzle welded.
f.Improper selection and installation of bit nozzle.
4.If any customer requires the replacement or credit for the defective
bits.Please contact the nearest sales office or the company
directly.For the used bits,please provide the original bit(including
nozzles and fragments fished from the well) along with all the
performance records(including bit running parameters,hydraulic
parameters,mud property,performance record,lithology,bit running
time and the abnormal phenomenon occurred,and information of the
bits used before and after the particular bit referred,etc.)
Note: The warranty stated herein extends only to the first user to whom Hengji company.
Hejian Hengji Bit Manufacture Co. Ltd.
2.
IADC | Recommended Parameter | Formation |
WOB KN/mm (bit dia.) | RPM(r/min) |
417\437\447 | 0.35~0.8 | 240~60 | Very soft low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc. |
517\527 | 0.35~1.0 | 220~50 | Very soft with low compressive strength and high drillability,such as mudstone,salt,soft limestone,sands,etc. |
537\547 | 0.45~1.0 | 220~50 | Medium soft with harder,more abrasive streaks,such as hard shale,mudstone,soft limestone,etc. |
617\627 | 0.45~1.1 | 200~50 | Medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
637 | 0.45~1.1 | 180~40 | Medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
737 | 0.7~1.2 | 180~40 | Hard with high abrasiveness such as hard limestone,dolomite,firm sands,etc. |
827\837 | 0.7~1.2 | 150~60 | Very hard with high abrasiveness,such as quartzite,quartzitic sand,chert,basalt,granite,etc. |
most importantly, Our company is specialized in producing all kinds of tri-cone bits in large quantities for many years. They are of good quality and have sophisticated technology. and our engineers and work team have professional knowledge and rich experience to satisfy your interests.
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