Recommended Practice for Drill. Stem Design and Operating Limits. API RECOMMENDED PRACTICE 7G. SIXTEENTH EDITION, AUGUST EFFECTIVE. API RP 7G (R). Recommended Practice for Drill Stem Design and Operation Limits, Sixteenth Edition, Includes Addendum 1 and 2 (). API RP 7G-2 (R). Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition (Identical Adoption of.

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API RP API Rp 4g Cabria. Installation of underground petroleum storage tank. We recognize our responsibility to work with thc public, the government, and others to develop andto use natural resourcesin an environmentally sound manner while protecting the health and safety of our employees and the public.

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API standards are published tofacilitate the broad availability ofproven, sound engineering and operatingpractices.

These standards are not intended to obviate the need for applying sound engineering judgment regarding when and where these standards should be utilized. The formularion rpg7 publication of API standards is not intended in any way to inhibit anyonefrom using any other practices. Any manufactum marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirements of that standard.

API does not represent, warrant, or guarantee that such products do in fact conform to the applicableAPI s t a n d a d AU rights wserved No part of this work may be wpnxhce4 stomd in a retTievaIsystem, or tmnmritted by any m e a ,electronic, mechanical photocopying, receding, or otherwise, without prior written pennisswn m the publisher. Copyright Q Americaa petroleumInstitute.

The purpose of this recommended practice is tostandardize techniques for the procedure of drill stem design and to dehe the operatinglimits of the drill stem. API publications maybe used by anyone desiring to do so. Every effort hasbeen made by the Instituteto assure the accuracy and reliabilityof the data contained in them; however, the Institute makesno representation,w m t yor guarantee in connection withthis publication and hereby expressly disclaims any liabilityor responsibility for loss or damage resulting of any federal,state, or xpi regulation with which this from its use or for the violation publication may conflict Changes h m the previousedition are denoted withbars in themargins.

The bars indicate new content or major editorial changes. Changessection to numben due to reformatting or minor editorial changesare not denoted with bars. This recommended pmctice shall become gective on the date printed on the cover b u may be used voluntarilyfrom the date ofdistribution. Heat Checking of Tool Joints Lateral Contact Forces and Length Collapse of DeepWell Casing. Rotary Shouldered Connection Interchange List Common Fixed Cutter Bit Sizes Theratioofthesection modulus of a rotary shouldered box at the point in the box rp7v the pin ends when made up divided by the section modulus of therotary shouldered pin at the last engaged thread.

This recommended practice involves not only the selection apii drill string members, but also the consideration of hole angle control, drilling fluids, weight and rotary speed, and other operational procedures. Theouterdiameter ofthe contact face of therotary shouldered connection. A sub, usually with2 box connections, thatis used to connect the bit to the drill string. Sections 4, 5, 6, and 7 provide procedures for use in the selection of drill string members.

Sections 8,9, 10, 11, 12, 3.

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A threaded connection on Oil and 15 are related to operating limitations which may reduce Country Tubular Goods OCTG that has internal female the rp7v capability of the drill string.

Section13 contains a threads. A documented system of gauge calibration and control. Section 14 contains statements regarding welding on down hole tools. Section 16 contains a classi3. An API service classification for used drill fication system for rock bits. Plastic deformation of metal at a temperature low enoughto insure or cause permanent strain. See also Appendix B. The loss of carbon from the surface of a ferrous alloy as a result of heatingin a medium that at the surface.

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The distance between the pitch line and root ofthread. A term applied to a sharp change of direction in a wellbore or ditch. Applied also to the permanent bending Of roPe Or Pipe3. A drift is a gauge used to check minimum ID of loops, flowlines, nipples, tubing, casing, drill pipe, and drill collars.

R7pg or tubedesigned to provide stiffness and concentration of weightat thebit. Improper performauce of a device or equipment that prevents completion its of designfunction. The process of progressive localizedpermanent structural rp7v occurring in a material subjected to conditions that producefluctuating stresses and strains at some point or points and that may culminate in cracks or complete frilcture after a sufiicient numberof fluctuations.


A failure whichoriginates as a result of repeated or fluctuating stresses having maximum values less than the tensile strength of the material. Silicak, salt, and phosphate may also be present. Oilbase drilling fluids are differentiated from invert-emulsion drilling fluids both water-in-oil emulsions amounts by the of water used, r;7g of ep7g viscosity and thixotropic is l ,and fluid loss. The pipe ends may or may not be upset.

QuenchhardeningHardening a ferrous alloy by austenitizing and then cooling rapidly enough so that some or allof the austenitetransforms 3. The square or hexagonal shaped steel pipeconnecting the swivel to the drill string.

The kelly moves through 3.

A length classification for A P I Oil Country the rotary table andtransmits torque to the drill string. A connection onto the bottom of the kellyto protect the pin end of the kelly used on drill stringelementswhichhascoarse, tapered operations. The last thread on the pin 3. The stress required to producefracbox or the box engaged withthe pin. An essentially full-opening valve installed immediately below the kelly, with outside diameter parallel and opposite although theirpaths are offset a speciequal to the tool jointoutside diameter.

Valvecan be closed to fied minimum amount. The maximum load divided by the zemove the kelly under pressure and can be stripped in the original cross-sectional area of a section separated by shear.

The sealing shoulder on a of 48 inches alongthe pipe body from the juncture of the tool rotary shouldered connection. The minimum makeup torque is the minimum amount of torque necessary to develop an arbitrarily derived tensile stress in the pin or compressive stress in the box.

This arbitrarily derivedstress level is perceived as being SufEcient in most drilling conditions to prevent downhole make-up and to prevent shoulder separation frombending loads. This process makes thejoint m m flexible andreduces the likelihood of fatigue crachg in this highlystressedarea 3.

Device at thetop of the drill stem whichpermits simultaneous circulation and rotation. The maximum tensile stress which a material is capable of sustaining. A pressure above working pressure uous phase and water the dispersed phase. Such fluids contain a vessel. The formof threadis the thread profde in an axial plane for a length of one pitch. The amount of variation permitted. A heavy coupling element for drill pipe having coarse,t a p e d threads and sealing shoulders designed to sustain the weight of thedrill stem, withstand thestrain of repeated make-up and break-out, resist fatigue, resist additional make-up during drilling, and provide a l e a k – p f seal.

The male section pin is attached to one end of a length of box is attached to the other drill pipe and the female section end Tool joints may be welded to the drill pipe, screwed onto the pipe, or a combination of screwed on and welded. A valve immediately above the kelly that can be closed to confinepressures inside the drill string.

A pipe end with increased wall thickness. The outside diameter may be increased, or the inside diameter may be reduced, or both. Upsets are usually formed by hot forging the pipe end. Gauges used for gaugingproduct threads. The pressure to which a particular piece of equipment is subjected during normal operations. The temperature to which a particular piece ofequipment is subjectedduring normal operatiom.