API Buttress Connections

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ScopeReferences.API RP 5C1: Recommended practice for care and use ofand tubing.casingAPI RP 5A3: Recommended practice on threadfor casing, tubing and line pipe.compoundsISO 13678: Petroleum and natural gas industries-Evaluation and testing of thread compounds for usewith casing, tubing, line pipe and drill stem elementsAPI RP 5A5: Field inspection of new casing, tubing, andplain-end drill pipe.API RP 5B1: Gauging and inspection of casing, tubingand line pipe threads.API 5B: Specification for Threading, Gauging andThread Inspection of Casing, Tubing and Line PipeThreads.Equipment, Material & DocumentsAPI Buttress ConnectionsRUNNING MANUAL.1. Verify API modified thread compound is available.2. If other compound is to be used, ensure it providesadequate lubrication and sealability. Refer to API RP5A3 or ISO 13678 for further details.TenarisHydrilIDM Code GDL00382/3 / October 2019These guidelines apply specifically to the use of APIButtress connections. This document is based on API5C1 standard which is the main document applicablefor this connection.Connection Specific Running GuidelinesAPI ButtressConnections1

API Buttress ConnectionsConnection Specific Running GuidelinesPre-Running1. If drifting the connections at the rig site it isrecommended to do so from box to pin end.2. Ensure connections are cleaned and free of all debrisand / or contaminants.3. Use high pressure water with detergent to cleanthe connections, it is not advisable to use an oil basedsolvent which may leave a residue on the threads.4. Never move or handle pipe without the correctthread protectors securely in place.5. Visually inspect threads prior to running, ensuring nodamage is evident.6. Verify compatibility of the API Buttress pipe with anyaccessories such as pup joints.7. Verify material grade of all accessories ensuringcompatibility with main string.InspectionTenarisHydrilRUNNING MANUAL1. Inspection criteria for all API connections is asoutlined in API RP 5A5.22. Ensure the complete thread area has no tears,gouges or raised metal.3. Black crested threads within the complete threadarea must not exceed 25% of the circumference oftwo (2) threads.4. Complete thread length is indicated in API RP 5B1.

API Buttress ConfigurationLENGTH TO THE TRIANGLE BASERUNOUTCOMPLETE THREADLENGTHBUTTRESS GENERALBOX10 RUNNING MANUALPIN3 TenarisHydrilIDM Code GDL00382/3 / October 2019TOTAL THREAD LENGTHTRIANGLEAPI Buttress Connections6. Any gouge or tear which traverses from the couplingOD to the face is cause for rejection.Connection Specific Running Guidelines5. Ensure the pin and box have no dents, tears orraised material which would interfere with correctassembly.3

API Buttress ConnectionsConnection Specific Running Guidelines1. The triangle is located at the base of a 1" by 24"white stripe for ease of identification.Thread Compound Application1. Apply a thin coating of thread compound on pinand box connections, fully covering all threads.2. The thread form should be fully visible.TenarisHydrilRUNNING MANUALDOPE4Correct dopingThread

API Buttress ConnectionsConnection Specific Running Guidelines1. Connections must be clean and dry when applyingthread lock.2. Apply a thin coating of thread lock on 50% of thepin threads furthest from the pipe body.3. Do not apply thread compound to pin or box.Make Up2. Make up acceptance criteria is defined based on therelative position of the coupling face compared to thetriangle stamped on the pin end:.Minimum Make up: One full thread turn beforeRUNNING MANUAL1. API Buttress connection is designed to be made upto a final position, there is no final torque specified.triangle base.Maximum Make up: Triangle apex.TenarisHydrilIDM Code GDL00382/3 / October 2019Thread Lock Application5

API Buttress ConnectionsConnection Specific Running Guidelines0.375" (3/8")(9.525 mm)TRIANGLE0.200" (5.08 mm)TOLERANCEMAKE UPADMISSIBLEZONE3. There is no torque specification for API Buttresshowever torque values required to reach an acceptablemake up tend to be similar within the same batch of pipe.4. In order to determine make up torque for the stringto be run:.Make up the first 15 joints to the base of the stampedtriangle, taking note of the required torque for each joint.Calculate the average torque.Use the average torque to make up the string.Ensure all make ups are acceptable by checking theTenarisHydrilRUNNING MANUALcoupling face position within the triangle.65. It may occur that during the make up, the couplingrotates on the mill end. This can be allowed providedthe coupling face on the mill end does not exceed theapex of the triangle stamped on the mill end pin.

API Buttress ConnectionsMILL END1. To avoid cross threading stab pipe in a smoothcontrolled fashion ensuring the pipe is vertical whendoing so, continue to support and stabilise the pipethroughout the stabbing and make up operation.2. Upon commencement of initial rotation use lowRPM (5 RPM or below) in order to ensure the pipe hasnot cross threaded during stabbing.3. If cross threading is evident, immediately reverserotate the pipe slowly, break out and inspect bothconnections.RUNNING MANUAL4. Maximum spin in speed should not exceed 15 RPM.TenarisHydrilIDM Code GDL00382/3 / October 2019RunningConnection Specific Running GuidelinesFIELD END7

API Buttress ConnectionsConnection Specific Running GuidelinesPulling1. Automatic stabbing system or stabber is highlyrecommended to maintain the pipe in a verticalposition.2. Apply the back up tong jaw on the lower part, overmill end, of the coupling.3. Apply power tong in low RPM (3-5 RPM) to breakout the connection, ensuring the pipe is stabilisedduring the break and spin out process.4. Visual inspection is recommended to classify thethread condition. Any rejected connections should beclearly marked and segregated for further investigation.5. Apply clean, dry thread protectors after applyingstorage compound on clean, dry connections.TenarisHydrilRUNNING MANUAL6. Storage / thread compound should always beapplied to connections post job, even rejects.8Tenaris has produced this manual for general information only. While every effort has been made toensure the accuracy of the information contained within this publication, Tenaris does not assume anyresponsibility or liability for any loss, damage, injury resulting from the use of information and dataherein. Tenaris products and services are only subject to the Company’s standard terms and Conditionsor otherwise to the terms resulting from the respective contracts of sale, services or license, as the casemay be. The information in this publication is subject to change or modification without notice. For morecomplete information please contact a Tenaris’s representative or visit our website at www.tenaris.com.This manual supersedes Version 03 / March 2018. Tenaris 2019. All rights reserved.

pin threads furthest from the pipe body. 3. Do not apply thread compound to pin or box. Make Up 1. API Buttress connection is designed to be made up to a final position, there is no final torque specified. 2. Make up acceptance criteria is defined based on the relative position of the coupling face compared to the triangle stamped on the pin end:.

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