API 7-1 drilling collar is one of the most important product of hexin oil drillings which mainly used to provide bit weight to drill so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. GANG GONG brand drill collars are manufactured strictly from API Spec7-1 standard.
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.
Drill Collars are integral heavy-wall joints that are manufactured from a solid bar of modified alloy steel. The solid bars are quenched and tempered to obtain the required mechanical properties, then trepanned, drifted and threaded. All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe. Lake Petroleum could supply slick type drill collar, spiral drill collar and Non-magnetic drill collar (NMDC).
Drill Collars are integral heavy-wall joints that are manufactured from a solid bar of modified alloy steel. The solid bars are quenched and tempered to obtain the required mechanical properties, then trepanned, drifted and threaded. All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe. Lake Petroleum could supply slick type drill collar, spiral drill collar and Non-magnetic drill collar (NMDC).
Drill Collars are integral heavy-wall joints that are manufactured from a solid bar of modified alloy steel. The solid bars are quenched and tempered to obtain the required mechanical properties, then trepanned, drifted and threaded. All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe. Lake Petroleum could supply slick type drill collar, spiral drill collar and Non-magnetic drill collar (NMDC).
We supply slick drill collars, spiral drill collars and non-magnetic drill collars; their sizes are from 3-1/8 to 11 inches. Besides the drill collars in the table below, we can supply other drill collars at customers' request Materials: Drill collars are manufactured from AISI 4145H modified steel, and are supplied in the "as rolled" surface finish condition. Alternative surface finishes are available. Trepanning and Heat Treatment: Drill collars are trepanned and drifted to API Spec 7-1. Full-length heat-treatment processes ensure that mechanical properties meet or exceed API Spec 7-1 requirements. A hardness range of 285-341, Brinell hardness and Charpy "V" notch minimum impact strength of 40 ft-lb at 70 F are guaranteed one inch below the surface. Traceability: Drill collar material and process traceability are maintained from receipt of the mill's certified raw material to completion of manufacturing. Serial numbers are die stamped on bar bodies. Rigid Inspection Procedures: We inspect all our drill collars to ensure compliance with API SPEC 7-1 standards. These inspections include visual dimensional checks as well as ultrasonic inspections over the entire body of the drill collar. Cold Rolling: Drill collar thread roots, as well as elevator recess upper radius, are cold-rolled. Cold rolling creates a compressive recess upper radius stress condition that increases fatigue life by minimizing crack initiation. Phosphate-coated or Copper Plating: All connections are phosphate-coated or copper plated to improve resistance to corrosion. Slip Groove, Elevator Groove and Size: Lake offers optional slip and elevator recesses to improve handling efficiency and safety. Unless otherwise specified, slip and elevator recesses are machined in compliance with API spec 7-1 guidelines. Thread Protectors: Our company offers steel, cast steel and plastic steel thread protectors for its drill stem products.
Quick Details Condition: New Warranty: 1.5 years Applicable Industries: Energy & Mining Local Service Location: None Showroom Location: None Video outgoing-inspection: Provided Machinery Test Report: Provided Marketing Type: Hot Product 2019 Place of Origin: Shandong, China Brand Name: Lake Petro Type: Drill Collar Machine Type: Drilling Tool Certification: API Material: Stainless Steel Processing Type: Forging Use: Well Drilling Product name: Non Magnetic Drill Collar Application: Oil Field Usage: Hole Drilling Size: API Standard Size Standard: API 7-1 Thread: API 5B
