Hopefully it will be of use to you - whether you're a rookie or a veteran. 0000113159 00000 n This savings reduces tripping time and helps bring forth first oil, earning money for the operator and making a drilling contractors rig more attractive. More information about cookies and your choice can be found in our Privacy Policy. 802.1X. PDF DS Connections - RDT Wi-Fi Networking. 0000087702 00000 n They offer good clearance, but often at the price of alarmingly low tensile and torsional capacity. We have the people, capabilities, and vision to serve the needs of a challenging and evolving industry. Epson WorkForce DS-40 and DS-560 | Wireless Scanner Setup )2ah2B0vYL]7:`P2pwnPUAXeR=TXK;:%-YyGK~=fOvmK3Jtb%(7nlJ`sy4%=[ All the damage on this connection was in the break out direction. Uniform wear and a minimum wall thickness of 80% of original wall thickness. To narrow it down further we are going to look at Rotary Shouldered Connections (RSC). For example. Also, each joint of drill pipe is fitted with a pin (male thread) and box (female threads) tool joints or connectors. We are glad to introduce this refreshed version of the site, with improved accessibility, updated content and new features. Drilling thread types for dummies - Odfjell Technology Threads also see a lot of minor damage from mishandling and depending on the location and severity of that damage in many easily be repaired. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'drillingmanual_com-large-mobile-banner-2','ezslot_15',641,'0','0'])};__ez_fad_position('div-gpt-ad-drillingmanual_com-large-mobile-banner-2-0');The number preceding regular in the name (in, for example, 6-5/8 Regular) refers to the drill pipe size on which the connection was originally to be (but is no longer) used. This secondary torque shoulder is not a seal. 0000058062 00000 n More information about cookies and your choice can be found in our Privacy Policy. Printing to a DNP DS40 Printer - Apple Community Mac OS & System Software / OS X El Capitan Looks like no one's replied in a while. Connection: XT39; Compatible With: OD: 4 7/8" (4.875") ID: 2 11/16" (2.688") Adjusted Weight: 16.46 lb/ft; Average Length: 31.5 ft; Add To Quote Download Full Spec Sheet. j[wS}`O*moP]j~MJlHF}B~ a@`3EbpQ2=E'f= #>l3QC"~5: #),C`a`a`aEb47}$5>r=II}D/DC$!O }hA4Ok_?p 0 67 That rule shouldnt be taken literally and the minimum amount of material should be removed in a single refacing. Both use the same thread form and are interchangeable with their API counterpart connection, as shown in the chart in the specifications tab. On a high torque connection There is an additional torque shoulder/mechanical stop at the end of the pin and back of the box. If there is space enough for a secondary shoulder in the API box, this can be a solution. The tendency for mud or cement trap in crevices are eliminated as well. PDF DRILL PIPE PERFORMANCE DATA SHEET - Complete Group Safety Joints - TTS Drilling Solutions Grant Prideco Double Shoulder and EIS connections offer enhanced performance and interchangeability with API rotary-shouldered connections. This is also a relatively new patented connection. Command Tubular is a manufacturer of Standard API Connections and provides American Petroleum Institute (API) certified connections in a variety of pipe lengths, diameters and steel grades licensed for: In addition to industry API tool joint connections, Command Tubular offers its advanced CET and CDS connections when higher torque is needed. Example 1) I inspected the drilling tools including drill collars, hevi-wate drillpipe, subs and miscellaneous directional tools on a rig drilling horizonal wells in the Edson and Hinton area between August of 2015 to December of 2020. NC means Numbered Connection and the number signifies the Gauge Point Pitch Diameter (GPPD) of the connection. $qi>}Px=fDYI px// hw7b|Z,/Eu{w?$/^%/N&W7G,)KU9:/#jWW4-~<>j1=~M}|cN1/LLZ!paL/.3^d! This additional strength provides the required torque for drilling to extended depths or in more demanding environments. 0000057993 00000 n 0000038446 00000 n Heavy Weight Drill Pipe - Command Tubular As the most balanced drill pipe connection we have ever put to market, Delta offers a cost of maintenance comparable to that of an API connection while providing improved performance. Access multiple NOV applications and services with one login. Downloads. TSC Drill Pipe | A Division of Texas Steel Conversion| Drill Pipe In addition, monitoring of the first 108,000 connection inspections showed Delta requires 3.1 times fewer recuts than XTmeaning cheaper repair bills, fewer pipe movements for repair, and simply less pipe needed as contingency. FAQs. Also, the 6-5/8 FH was officially reinstated in 1993, no doubt because of its increasing popularity on 6-5/8 inch D/P. As the pin and box connections are being screwed together in theory there should be no weight or tension on the connection. Interchangeability means that the connections will mate together, make up, and function; however, the performance properties will be limited to those of an API connection. 3 0 obj bKun"`e7{8+;Z Delta Drill Pipe Connection | NOV This is a patented design for tool joint pins. Products TSC's Drill Pipe product range includes sizes from 2-7/8" diameter pipe to 6-5/8" diameter pipe. We hope to hear from you soon, and feel free to . 0000112955 00000 n Torque advantage over API and runs easier than the competition, providing the optimum solution to reach total depth as fast as possible. In summary, the Delta connection offers: Extreme torque (with as much as 20% more than XT) for drilling more extended-reach wells Enhanced hydraulics (~30-40% reduction in pressure losses compared to API) to promote faster drilling with more downhole tool power and improved hole cleaning 0000087264 00000 n 5 Drill Pipe Range II - DS50 Connection. 0000097810 00000 n GPDS and EIS are not interchangeable with each other. Since this firewall blocks incoming connections you may need open a port through it for certain games and applications. 5 Drill Pipe Range II - NC50 Connection. We have the people, capabilities, and vision to serve the needs of a challenging and evolving industry. It is also a good idea to monitor the damage to the top drive saver sub working pin it will tell you if there is a problem by its wear pattern. There are 17 NC connections with pitch diameters ranging from 1.1/16 (NC-10) to 7.3/4 inches (NC-77). WEP Settings or WPA Settings: Enter the wireless connection's security key. Whenever I start scanning, the software EPSON scanner works fine but it will . Allows D/P with a minimum wall thickness of 65% with all wear on one side so long as the cross-sectional area is the same as premium class, that is to say, based on notmore than 20% uniform wall reduction. Non-API Drill Pipe Connection Thread Types H-90 Connections Connections - Command Tubular By the way, our official name and address is Elsie Publishing Institute (EPI), PO Box 811, East Lansing, MI 48826, ph 517-371-5257, fax 517-371-5200, www.LConline.org. That means that they have an extra torque shoulder in the nose of the pin and in the bottom of the box. 3 0 obj Rejected a total of 1 hevi-wate drillpipe for excessive thread or seal damage. It is simply an NC connection with an additional torque shoulder at the pin tip. For example, a 5 drill pipe can be described as 5, #19.5, E, XH, NC50, Premium. Let's take a look at how this works. Learn how to connect your Epson WorkForce DS-40 and DS-560 scanners to a wireless network. Examples of this are Vam Eis, DSTJ, GPDS, etc. VAM Services endobj PDF DS-40 User's Guide Largest supplier of lacrosse equipment in Mid-Michigan. To start the conversation again, simply ask a new question. With print speeds as fast as 8.9 seconds and a unique roll-fed printing method, the DS40 can print up to 400 4"x6" prints before a media reload is . Secondly you see much more minor thread damage now because of the shear weight of the top drive. The machine has USB 3.0 and the latest driver is downloaded from EPSON website which is compatible with Windows 10 64-bits. AC3000 High Power Wi-Fi Tri Band Router. Athlete's Connection/Teamlax, Lansing, Michigan. 35 likes. Innovative thread design Similar collar ID and OD to standard API NC connections Developed to eliminate twist offs and reduce NPT and maintenance costs associated with downhole failures, the XPC* extreme-profile single shoulder connection significantly increases fatigue life over standard API NC connections. 58 0 obj <>stream 5 Drill Pipe Range II- VX46 Connection. In Michigan for a project and working across multiple universities. Access multiple NOV applications and services with one login. Scanning. D-Link Technical Support One thing I do though is when it comes to galled seals with raised burrs that do not meet the requirements to be refaced, manufacturers recommend not filing the gall flat but to reface the seal instead (raising repair costs). 4-1/2" 16.60# S-135 DRILL PIPE WITH DS40 CONNECTIONS The technical information contained herein, including the product performance/spec sheets and other attached documents, have been generated from material provided by the manufacturer. When evaluating the condition of a seal I use API and manufacturers standards as to the acceptability of the seal and when to reface the seal if required. Keep in mind for example a 4 1/2XH pin like the one bellow has over 4 meters worth of threads if they were stretched out. 789 0 obj <>/Filter/FlateDecode/ID[<52A05280C9E5CD4FA9AA3257B6CE4E14>]/Index[780 105]/Info 779 0 R/Length 70/Prev 913645/Root 781 0 R/Size 885/Type/XRef/W[1 2 1]>>stream Drill Pipe; Heavyweight Drill Pipe . For more information on the DS-40, visit: http://bit.ly/2CYTMgg Show more Show more Epson WorkForce. - Be LIBERAL with the thread compound in the box, the base of the box, and on the pin using a copper-based or a compatible thread compound. Rotary Shoulder Connections - B.h.a. Inspection Services Ltd. 0000038377 00000 n hb```b``f`f``dcd@ AV Hd1sR$I>:5Ox,TdxL~8cS Ghsu2_kGP#o endobj 0000086109 00000 n 0000088304 00000 n On this page I will briefly go over the mechanics of a rotary shoulder connection and the type of damage that is found and what I believe is the cause of that damage and the actions that I take to correct that damage if possible. 0000028548 00000 n With the Grant Prideco Delta connection, you no longer have to sacrifice performance for cost. At Odfjell Well Services we constantly hear from people who ask us why certain drill pipes don't go together. 0 With regularly scheduled field inspections of your bottom hole assembly that includes minor repairs to threads and seals there is no reason why a string of drilling tools shouldnt last until the drilling program is complete with minimal rejects. Dell EMC Configuration Guide for the S4048T-ON System 9.14.2.6 0000002034 00000 n Dlink DSL-2640B routers include a very basic firewall that helps protect your home network form unwanted access from the internet. 2. Since downhole stress can be additive to makeup stress, PAC connections are that much closer to failure even as they pass through the rotary. I determine the refaceability of a connection by referencing the pin or box bench mark and if a bench mark is not present (some machine shops dont re-apply bench marks when recutting) I measure the pin length or box counterbore length to assess refaceability. DPM-DS pin and box connection made up to a smooth bore, without gap or change in ID transition at the secondary make-up shoulder. Once the opposing seals/primary torque shoulders and thread load shoulders on the pin and box connections come into contact with each other torque is then applied until recommended makeup torque is achieved. This type of damage is easily repaired and actually must be repaired before a thread profile inspection can be performed accurately. <>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> It is also my observation that if you can keep a connection in the field working the thread flanks and torque shoulders will harden up from the cold working that occurs every time the connection is made up making them more resistant to mechanical damage. Notices. Custom screen There are no suggestions because the search field is empty. On a high torque connection There is an additional torque shoulder/mechanical stop at the end of the pin and back of the box. Removed 11 cracked drilling tools from service. The original high-performance rotary-shouldered connections. GPDS and EIS are not interchangeable with each other. HW |?_?g[w9_~ppEY$EfLJWJ"?g)=k#C?j{q9\%u>>zpx_~}}o_?q^iH(?bt^%=S"f|\\[~l+s9XY 6i;i'@?g#wcbH56M2MJe fe;.s ?T}DAL0[HG;2poGTR'GWw1!'7 Before you try to screw different connections together, do the following. description date rev. Contact your Grant Prideco representative about our uLtimate Series connections for more detailed information. P/KhD%tPQ`l] uvc)-\@NHBjzCIh~D*L;JJAgUor2xr8SWm$~F PDF DS Connections - rdt-usa.co Welcome to VAM. 4 0 obj They were originally a proprietary product of Hughes Tool Company and are easily recognized by their shallow 90 degree thread angle. Turn off the scanner. Welcome | Lesbian Connection Magazine As Voltaire so eloquently put it: "One day everything will be well, that is our hope. Choose the Dynamic IP Address option from the WAN Settings pull-down menu. D-LINK DSL-2640T USER MANUAL Pdf Download | ManualsLib AC2600 High Power Wi-Fi Router. Page 38 DSL-2640T ADSL 2+ Router User Guide To configure a Dynamic IP Address connection for the WAN, follow these steps: 1. Powered by ASTOUNDZ, 7-1 and 7-2 (ISO 10424-1:2004 and ISO 10424-2:2007), Best in class performance and optimized operational characteristics required of high torque connections to drill the well designs of today, Available on all sizes of drill pipe, heavy-weight drill pipe and collars for use on work strings, slimhole drillstrings and frac strings, 5 turns to make-up is the fastest of any high torque connection, 170% 200% of the torsional strength of API connections, Provides increased torque with the addition of an optimized secondary torque shoulder, Reduces the amount of repairs required to less than 1% per well drilled, Cuts rig NPT during tripping operations by 50% over competitive high torque connections, A smooth ID through the connection, which can be made with smaller ODs and larger IDs than standard connections while maintaining higher torque capacities. I have been using this tool since starting BHA in 1993 with no problems. Drilling Equipment. 0000057580 00000 n Command Tubulars CET and CDS connections offers technically advanced solutions for even the most demanding drilling conditions. Yes, some connections go together with other types under given circumstances. Join our global family and become part of the company thats leading innovation within the upstream oil and gas industry. 0000009762 00000 n Our goal is, quite simply, to connect the lesbian community worldwide. wW}Mdtx}~rOjJ|9us|0p With the same outside diameter and inside diameter, our DT connection torque capacity is about 40% higher than the API connection. Scanner Basics. Delta delivers improved overall performance compared to our XT connection but with the ease of use and lower cost of maintenance of an API connection. endstream endobj 5 0 obj <> endobj 6 0 obj <>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/Type/Page>> endobj 7 0 obj <>stream ! The CDS connection can be made up with API numbered connections and some other available double shoulder connections. %PDF-1.6 % Grade E D/P has a yield strength of 75,000 psi. There is no gap or change in the ID from the box to the pin, creating a smoother fluid flow with less turbulence and eliminating the opportunity for trapped cement and cuttings. The most common damage is to see a raised burr form on the thread crest and minor galling on the stabbing flank side of the threads. Thanks to the financial capital provided by our investors, we're able to continue developing innovative products and solutions to the oil and gas industry that lead a safer, more environmentally friendly future. With up to 50% faster makeup than the XT connection, Delta saves up to 4 seconds on each connection makeup and breakout. PDF T000293 - DS BOX FIELD INSPECTION DIMENSIONS - Complete Group These are single shoulder connections: They only have one torque shoulder on both pin and box. 4.5 Drill Pipe Range III - DS40 Connection. 0000086367 00000 n 4" Drill Pipe, S-135, XT39 Connection - Saltire Energy The Grant Prideco Double Shoulder (GPDS) and EIS connections are high-performance rotary-shouldered tool joint connections available for drill pipe ranging in size from 2 to 6 in. Click Transmit. 0000057067 00000 n High-strength connections designed for demanding drilling applications. One the world cant live without. %%EOF That is a legitimate question. I also have the capability to reface DS40 and CET43 connections using custom built refacing tools from Tubular inspection Products that are based on the Drilco tool. 4 0 obj <> endobj The user is fully responsible for . 0000033645 00000 n Thread stretch is a normal part of making up any rotary shoulder connection as long as the point of elasticity is not passed. It is much less susceptible to shock and vibration than bearing stages. 0000001631 00000 n <>/Metadata 932 0 R/ViewerPreferences 933 0 R>> Throughout every region in the world and every area of drilling and production, our family of companies provides the expertise, equipment, and operational support necessary for successnow and in the future. All rights reserved. Feel free to use this compatibility matrix as a guide when trying to figure out what goes together with what: So until a genius invents the perfect quick connection, we just have to accept the status quo and live with it. However, the 5 1/2 FH was officially resurrected about 10 years later. 0000104695 00000 n PDF Diesel Generator Set MTU 4R0113 DS40 - mtu Solutions The load flank which once the connection is made up takes all the load along with the torque shoulder(s). 0000113251 00000 n DIR-2640-US. DS-40 User's Guide Thanks, Background Gas In Drilling Oil & Gas Wells, D Exponent Calculation & Correction Equation, Drill Pipe API Specifications, Thread Types &Tables, Cementing Calculations- 7 Steps & Spreadsheets. Contact your Grant Prideco representative for hydraulic-optimized configurations and for further OD and ID combinations. Every day, the oil and gas industrys best minds put more than 150 years of experience to work to help our customers achieve lasting success. Printing to a DNP DS40 Printer - Apple Community Each joint of drill pipe consists of the tube body and the Tool Joint (connection). <> eY.{=o;N2Y,T,4 B i>=^^rV6_EOUj?-oZP.p>nu4k#J+JXcw;!qbZ[:@|hRccM5s/?7?+o]ek_G|t`k09sdFh^ 9OfBHQ)BpPfr%f:fI'x'-F BSCGi+{t_ 2 7/8IF, 3 1/2IF, 4FH, 4 1/2XH, 4 1/2FH, 4 1/2IF, 4 1/2REG, 6 5/8REG, 4H90,4 1/2H90, 5H90, and 7H90. Only comedy club in town with the nation's top comedians PROVEN to make you laugh! Example2) I inspected the drilling tools on this rig drilling horizontal wells in the Edson and Hinton area between August of 2017 to April of 2021. Each description item is explained in more detail below.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'drillingmanual_com-box-4','ezslot_8',634,'0','0'])};__ez_fad_position('div-gpt-ad-drillingmanual_com-box-4-0'); Which is simply the plain end (tube) outside diameter. D-Link Technical Support As the grade (minimum yield strength) increases the actual weight increases because the upset has more metal in it. SST boxes are identical to NC boxes of the same size. Specifications: Select a Size Connection Loading. Below are photos of a DS40 pin connection that I completed minor repairs on and then was subsequently used to drill four horizontal wells. 4 0 obj But take the necessary precautions. I HAD PING FROM THE PC TO THE SILEX NETWORK ADAPTOR WITHOUT . That is a refacing rate of about under 10% and reject rate for machine shop recuts due to mechanical damage of under 1%. This improvement is achieved at higher cost, reduced availability and sacrificed field repairability. 0000018152 00000 n The longest & major section of the Drill String Componentsis the Drill Pipe. In addition to industry API tool joint connections, Command Tubular offers its advanced CET and CDS proprietary high torque double shoulder connections when higher torque is needed. Feel free to send your remarks or ask your questions to Mr Help. What might come as a surprise to many is that no API RSC is pressure rated with regards to gases and liquids. RSC's can endure high pressures under favourable conditions. 0000057331 00000 n I do not file seals but I do dress seals using a file wrapped with emery cloth to remove minor raised galls. Power tools that are not specifically designed for seal refacing should never be used to dress a seal. MTU 4R0113 DS40 Diesel Generator Set 40 kWe/60 Hz/Standby/208 - 600V Reference MTU 4R0113 DS40 (40 kWe) for Prime Rating Technical Data . 2 0 obj The minimum OD varies with what grade and weight the drill pipe is. Every time that seal is refaced takes life away from that connection. endstream endobj 129 0 obj <>stream For drill pipe connections, Delta is the difference. Wide variety of thread connections Safety Joints Safety Joints are designed for high bending flexibility. /h3ZSx "B>cS_7A1B5D=$BCkx7=`[k2}C?X^2AtM,*. Refacing should be a last resort when repairing minor seal damage. Some premium connections are compatible with API connections, even though one of them has a double shoulder and the other not. Frode Bjrheim is a specialist in drill pipe standards and lifting equipments with more than 30 years' experience in the oil & gas industry, both offshore and onshore. 0000009508 00000 n uGPDS is an enhanced version of the GPDS connection that enables either higher torque capacity or further enhanced hydraulics. In order for this to work the thread profiles need to match each other. The same drill pipe with a CDS40 connection will have a premium minimum OD of 4 3/4. The reason for their popularity habit and the belief that changing to NCs would cost more than it would be worth. The actual weight for grade G pipe is 21.92 lb/ft.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'drillingmanual_com-leader-1','ezslot_11',635,'0','0'])};__ez_fad_position('div-gpt-ad-drillingmanual_com-leader-1-0'); Drill Pipe Grade states the minimum yield strength of the metal which is the tensile stress that will result in 0.5% strain. M-DS40-XYZ XYZ Linear Stage - Newport All this damage is being caused on the drilling floor and by evaluating the mechanical damage to connection threads and seals you should be able to determine the cause of the mechanical damage and make corrections. The D/P is inspected periodically to detect cracks, pits,reduction in wallthicknessandother defects. 0000097385 00000 n PDF DP/LS Performance Sheet - Workstrings International by revisions ds box field inspection dimensions connection a box depth b c'bore c min wall d bevel dia. 0000112599 00000 n They are the load flank and the stabbing flank. As an example a 4 G105 15.7 lbs/ft drill pipe with 5 x 2 7/16 NC40 connections has a premium class minimum OD of 5. If I see mechanical damage to threads that I believe can be prevented by adjustments on the rig floor I report this to the rig manager. Delta belongs to the same torque segment as our XT connection and offers the same hydraulic performance. 0000087289 00000 n Removed 1 cracked drilling tools from service. The result is that drilling tools arent being inspected as often as they used to be allowing minor mechanical damage to get worse. trailer PDF DP-MASTER DS DOUBLE SHOULDER CONNECTION - Sub-Drill With more relaxed inspection criteria and 50% more opportunity to reface the connection, Delta shows a very low recut rate and requires 30% less material to recut the connection. %PDF-1.7 Tubular Rentals | Star Valley Oilfield Services %PDF-1.5 ` 0000097048 00000 n 2 0 obj 0000088212 00000 n Our award-winning DS40 is a compact, affordable and powerful digital photo printer that uses a high-resolution dye-sublimation processor to produce photos with impressive full-color details. They are manufactured with a proprietary thread designed to prevent unwanted back-off failures. I won't be talking about connections for casing or tubing. Tool Joint / Connection Specifications. Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM) Access Control Lists (ACLs) Bidirectional Forwarding Detection (BFD) Border Gateway Protocol (BGP) These included the NC-50 (old 4.1/2 IF) the NC-46 (old 4.1/2 XH) and NC-38 (old 3.1/2 IF). stream To accept cookies from this site, please click the I Accept button below. High-strength connections designed for demanding drilling applications. RSC's come in two sub-categories: Study the schematic for drill pipe tool joints below to gain a better understanding of what we are talking about: > Read also: How to choose the right drill pipe. Therefore, in this article we shall discuss API drill pipe specifications (specs), description, classification & drill pipe connection thread types. Thread Type Compatibility | PipeandHose.com Fully Interchangeable with API and some DS connections, Extended by being able to wear to a smaller OD while maintaining a torsional capacity greater than 80% of the drill pipe tube. The API has established guidelines for drill pipe classification classes in API RP7G. Get help by chat, email or phone. I refaced a total of 66 seals. hbbd``b`]$7 x $ K@JHu3012c`aQbh^ Tool joint upset type is a part of the drill pipe specifications (specs). 0000113309 00000 n Connection/Tube Torsional Ratio Tool Joint Connection Type DS40 OD mm Material Yield Strength MPa 896 Tensile Yield Strength kdaN OD mm 133.4 Torsional Yield Strength ft-lbs ID mm 68.3 Recommended Makeup Torque ft-lbs Pin Shoulder Angle deg 18 Pin Tool Joint Length mm 356 Box Tool Joint Length mm 356 Drill Pipe Assembly Shoulder-Shoulder Length . Specifications The Grant Prideco Double Shoulder (GPDS) and EIS connections are high-performance rotary-shouldered tool joint connections available for drill pipe ranging in size from 2 to 6 in. Makeup Torque Guidelines - Good COPPER-BASED thread compound is recommended for rotary-shouldered drill pipe connections by the OEM. All Full Hole connections were made obsolete by API in 1968, to be superseded by NCs. 0000001728 00000 n That is a refacing rate of about 2% and reject rate for machine shop recuts due to mechanical damage of less than 1%. Our DS is interchangeable with the following API thread connections: DS38 NC38DS40 NC40DS46 NC46DS50 NC50DS55 5 1/2 FH High TorqueConnections DT Connections DT connections are double shoulders connections with API thread pro les. The API bore back box stress relief feature is standard for the box connection on Heavy Weight Drill Pipe with NC38 and larger connections, helping to extend the service life of the connection; Cold rolling the thread roots on all Heavy Weight Drill Pipe connections increases the connection's ability to resist fatigue cracking;

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