Additional tests were conducted at a later date that were made-up to the apex of the triangle.
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These box members have an interiorly-threaded female end corresponding to their respective pin members.
THREADING TO API SPECIFICATIONS: API Threads with couplings are extra strong for deep and high-deviated wells.For all size, weight and grade combinations tested, phosphatized couplings with API modified thread lubricant successfully sealed liquid internal pressure 100% of the time.
GB CD “Drilling with Casing” ConnectionTorque shoulder prevents over make-up. type (EUE, STC, LTC, BTC), balancing flexibility with high torque.This improved connection includes a first pipe section having a standard API triangle mark at a predetermined position on its exterior surface for the proper axial engagement of the pin member with the coupling or box member.
Oil and Gas Industry threaded connections makeup procedures and standa Oil and Gas Industry threaded connections makeup procedures and standa EngrKD (Petroleum).This torque is sometimes determined by API torque recommendations.Directional casing while drilling applied to improve high-angle.
SUBJECT: COUPLING MAKE-UP - Hunting EnergyA first pipe section 10A includes an externally threaded pin member 12 having a face 14 at its end.The present invention is advantageously used with a buttress connection.The operator inputs joint data, make-up specifications and limits,.The box member is plated with a metal substantially comprising tin.
Optimal Make-Up Torque for Trapezoidal ThreadedAngles and areas of the stab flanks and torque shoulders are optimized.If the face 22A has not reached the edge 24 A of the triangle mark 16, the torque is increased until either the face 22A progresses into the body of the triangle mark 16 or until maximum torque occurs.PERFORMANCE PROPERTIES Requirements for Leak Resistance of API. make-up torque values.Also, the tin plating on the couplings was specified as 2.5 mils, to simulate the worst case (thinnest) tin plating dimension within test specification.Addendum 1 to Specification for Threading and Gauging of Rotary Shouldered Thread Connections. seal face has to handle the misapplication of make-up torque,.
Therefore, the thread torque values can be prescribed for specific torque operation.Following the coupling installation for a lot of pipe, histograms of mill-end makeup torque should be prepared.Buttress Thread Casing, Wholesale Various High Quality Buttress Thread Casing Products from Global Buttress Thread Casing Suppliers and Buttress Thread Casing Factory.Other pins and couplings were specially machined to provide the worst case thread width dimensions that were possible within API tolerances, as described earlier.
Cause analysis of Casing thread damage of one projectField of the Invention This invention relates to the field of tubular connections and methods for connecting tubular members, particularly for oilfield connections of threaded buttress pin and box members. 2. Background Description Pipe sections used in oil fields (for example long sections of well casing) usually have a tapered, exteriorly-threaded male end called a pin member.
All three of the specimens successfully completed all phases of the test program.Recommended Make-Up Torque, API Tolerances, TFA Chart Drill Bits Roller Cone BIT MAKE-UP 1) Use the correct bit breaker. 2) Inspect the bit for potential damage.This makeup condition is also suitable for liquid pressure applications, but not for gas pressure applications.This plant is one of the few in the industry with hot sizing.
Trident Steel is a distributor of API oil country tubular Goods.A method of connecting threaded pipe sections to form a made-up thread casing, comprising the steps of: a) providing a first pipe section including an externally threaded pin member having a face at its end, said first thread section having been marked with a triangle stamp in accordance with API Specification Std. 5B, Section 2 (13th ed.There is great economic incentive to improve the sealability performance of API buttress connections.The products are deemed identical in performance by the manufacturer, except that the mill-end requires about twice the torque to break-out than the field-end product.Both specimens successfully completed the liquid pressure testing, but leaked during gas pressure testing when a compression load was applied.
This makeup condition successfully contains gas internal pressure, assuming all thread elements are within API tolerances.Application of the compression load possibly caused the load flanks of the connection to separate, providing a leak path through which the gas could pass.Hi All, I would like to know how the make-up torque for a buttress connection is calculated.