Derun Drill Collar

Derun drilling motor is a positive displacement motor. High pressure drilling fluid flows into the drilling motors, thereby enabling the hydraulic energy to be converted into mechanical energy, at the same time, the rotor drives the shaft and bit to rotate to achieve the purpose of drilling. Derun produces LZ73, LZ89, LZ95, LZ102, LZ120, LZ127, LZ146, LZ165, LZ172, LZ185, LZ197, LZ203, LZ216, LZ244, LZ286 and other types of drilling motors. They are for drilling diameter of 88.9 to 660mm. Derun also design and develop drilling motors with special sizes, different structural features and operating characteristics in accordance with the user's requirements, thus forming different varieties. At present, in addition to ordinary straight drilling motors, Derun can also provide the following types of drilling motors: Bent drilling motors The bent angle on the universal shaft can meet different kickoff requirement, there are single-bent and double-bent available. Bent angle adjustable drilling motors The bent angle of the drilling motors can be adjusted on well surface which enhance the extension of kicking off. Extension drilling motors On the basis of the ordinary drilling motor, improve motor torque to make the bit drilling quickly by increasing motor stage. Hollow drilling motors To meet the needs of high flow rate solids carrying in drilling, hollow rotors with carbide nozzles of different sizes are adopted, which can increase the input flow rate and the horsepower of drill bit. Drilling motors with high kick-off rate: Unique structural design, shorter body, bent point closer to the drill bit, and kick-off rate of up to 1 m. Saturated saltwater mud-resistant drilling motors: To maintain long time operation of drilling motors in saturated saltwater mud, special rotor coating is adopted to provide better corrosion and wear resistance. High temperature drilling motors In order to improve the high temperature resistance of the stator rubber of the drilling motors, to meet the drilling requirements in high geothermal gradient region and deep and ultra-deep well drilling requirements, high temperature resistant rubber is adopted to increase the temperature resistance of motor above 150 degree Sealed driving shaft drilling motors The ordinary mud lubricated driving shaft is replaced with oil lubricated seal driving shaft, which improves the working conditions of the thrust and radial bearings, thus extending the service life of the drilling motors.

Derun mechanical drilling jar is a full mechanical drilling jar, it also can be use as fishing tool. It generates upward jarring as well as downward jarring which can solve tight pull or sticking troubles during drilling. It is the first optional drilling jar for vertical well, deep well, directional well and complicated well operations

Derun provides all type of drill pipes, include oil drill pipe, water well geothermal well drill pipe, coalbed methane shale gas drill pipe and flush joint drill pipe, also various kind of tool joints. Description and specification Size full range from 2-3/8 inch to 6-5/8inch Grade e75 x95 g105 and s135 Upset type eu iu and ieu. Connection from nc26 to nc50 5-1/2fh and 6-5/8fh Standard api spec 5dp api spec 7-2 api rp 7g.

Derun drilling motor is a positive displacement motor. High pressure drilling fluid flows into the drilling motors, thereby enabling the hydraulic energy to be converted into mechanical energy, at the same time, the rotor drives the shaft and bit to rotate to achieve the purpose of drilling. Derun produces lz73, lz89, lz95, lz102, lz120, lz127, lz146, lz165, lz172, lz185, lz197, lz203, lz216, lz244, lz286 and other types of drilling motors. They are for drilling diameter of 88.9-660mm. Derun also design and develop drilling motors with special sizes, different structural features and operating characteristics in accordance with the user's requirements, thus forming different varieties.

Command Energy’s drill collars are made of modified AISI 4145H chromium molybdenum alloy steel. These drill collar bars are full-length heat treated and water quenched to obtain mechanical properties as specified by API Spec 7-1. Full mechanical and chemical mill test certifications are supplied with all drill collars. These mill test certifications guarantee a hardness range of 285 to 341 BHN and an impact value of 40 ft-lbs at room temperature, one inch below surface. All drill collar bars are trepanned then drifted to API specifications to ensure close tolerance bores. Drill collars are also supplied with the outer surface either machined or rough peeled.

Our products include drill collar, drill pipe, heavy weight drill pipe, stabilizer, subs, hole opener, roller reamer, casing scraper, key seat reamer, kelly valve, full opening safety valve, ft type drop-in check valve, fj type-arrow back pressurevalve, inside bop, float valve sub, by pass valve, cup tester, wear sub, circulating sub, cross over sub, reduce sub, saver sub, lift sub, different of drilling jar, fishing jar, shock absorber, bumper jar, oil jar, bumper sub, jar intensifiers. We also manufacture bowen 150, bowen70, bowen 20, overshot and spear, bowen 150, bowen70, bowen 20, overshot and spear, also different king of oilfield fishing tools, fishing magnet, milling tools(different kind of mill shoe and tap), internal casing cutter, external casing cutter, marine or mechanical, hydraulic bucking unit, downhole motor and tester, jar tester.

Made of AISI4145H alloy steel, drill collar mainly used between the dill pipe and drill head and connected by conversion connector so that they can provide the pressure and weighting to dill head , in order to make the dill head to keep right trace . Api and iso standed

Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. MS brand drill collar are manufactured strictly from API Spec7-1 and SY5411 standard.

1. Hardness range of 285 to 341 BHN and a charpy impact value of 40ft/lbs are guaranteed for evenly distributed 16 points in any cross sections at room temperature. 2. Connections as phosphate coated father machining to protect the threads from corrosive elements and to prevent galling upon initial make -up. Thread roots are cold rolled on API and H0-90 connections. 3. Pressed steel thread protectors are supplied to all drill collar that are equipped with standard connections. 4. Manufactured strictly according to API standard. 5. Widely used in oil, gas, HDD and geothermal field.