Drilling Engineering

Summarize    Non-Rotating Torque and Drag Reducer (NRDP) is recommended to use in the cased hole and is generally used for reducing torque, eliminating casing wear and protecting drill pipe tools against wear. These tools Can be used to drill horizonal well, extended reach well and high angle deviated well.FeatureNon Rotating one piece sleeveMud lubricatedSleeve Material - Steel 4140HLow coefficient of frication chromium alloy on sleeve and mandrel stress areaOne piece Mandrel - Steel 4145No rubbers, elastomers or bearingsFail - safe designParameter      Thread Type         3-1/2" IF         4-1/2" IF      5-1/2" FH     Body OD              5"           6-1/2"              7"     Minimum ID              2"               3"          3-1/2"     Sleeve Nominal OD           5-3/4"             8.1"            8.1"     Sleeve Length              8"               8"              8"     Shoulder to Shoulder             42"              42"             42"      

Improves drilling efficiency and cementing quality by eliminating the torsional borehole  of the horizontal well and running difficulties of drilling and completion string.Improve ROP  by reducing or eliminating the vibration and excursion of drilling bits.Lowers or eliminates the drilling bit’s hold-up.

This drill assembly features functions as bumper, jar and hydraulic oscillator.This tool improves drilling efficiency, reduces drilling friction,  eliminates the sticking, increases WOB,  increases drilling speed  and bit’s footage, which eventually shortens drilling period and cuts drilling cost. 

    The valve is our patented product designed to prevent downhole blowout, which mainly comprises the valve body, inserts, cylinder sleeve, ram, torsion spring and pin seat. The ram will not automatically close when tripping in hole, but instantly shuts in case of any flowing even blowout. The flapper will easily open if increasing pressure  downhole.    Key parts are as follows: 

All kinds of drilling stabilizers (including tungsten carbide insert  Stabilizer)Coring tool and spare parts (double-cylinder, single-cylinder)Junk Cup,  reverse circulation junk basket, reverse circulation junk basket with magnet insert, magnet  fishing tool, impression block, short drill collar, stabbing guide, bit breaker, driftLogging Tool fishing tool, cable cutting/fishing toolCasing scraper, table taper, die collar, releasing and circulating overshot, milling taper, mill shoeSafety joint, crossover joint, orienting (bent) sub, lifting sub, releasing spear, circulating sub, watermelon reamer, blade bitArrow check valve, drop-in check valve, kelly cock valve, by-pass valve, testing plug, rubber cupsChoke/kill line, wellhead flange, gasket for wellhead flange, high-strength bolts, drill spool