rotary sub-thread checking procedure-jssbrochure[1]

8/2/2019 Rotary Sub-thread Checking Procedure-JSSbrochure[1]

1/4www.gagemaker.com

CONNECTION PERFORMANCE

ROTARY SHOULDERED CONNECTIONS

THREAD INSPECTION SYSTEM


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THREAD LEAD

THREAD FORM

INSERT IDENTIFICATION

Gagemakers Joint Strength System (JSS) is a revolutionarybeakthrough in accurately gauging the quality of rotary

shouldered connections. Why? The answer lies in the mosimportant measurement used to accept or reject a connectorsqualitypitch diameter. Pitch diameter is the controldiameter used in the design of a connector. Historically, pitchdiameter is one feature on a connector that has been left tointerpretation by the fit of a ring or plug gage. A ring orplug gage will not directly detect variation in pitch diameter

Gagemakers Join

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Insert Identification

The first step in the quality process is toensure the tooling being used is correctfor the job. Use the JSS Thread Insert

Identifier Templates to quickly verify thatthe correct threading insert has beenselected. A quick mating of the insert tothe template ensures the insert is correct

for the job. JSS insert identifiers havemultiple notches on each template and areavailable for all API thread forms.

Thread Form

Thread form accuracy is important if twoconnectors are to make-up properly.Using a JSS Thread Profile Gage and a JSS

Thread Addendum Gage provide a quickcheck of the thread to ensure that the formis correct. Thread form verification ensuresform accuracy.

Thread Lead

Verifying thread lead is within toleranceis a required inspection according to APspecification. Application of the JSS Lead

Gage to a setting standard and then to theproduct confirms that the lathe is cuttingproperly. Lead variation has a direct effecon pitch diameter and how two connectors

go together when made up.

JSS Six Step Inspection ProcessMost threaders are already performing four of the six steps in this inspection process.

STEP 3STEP 2STEP 1


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THREAD HEIGHT

PITCH DIAMETER

THREAD TAPER


Thread Taper

Thread taper is another inspectionrequired by API Spec 7. For accurate taperinspections, use the JSS Taper Gages to

verify that the pin and box connectors willhave matching tapers. As connectors aremade up, taper errors induce high stressesthat eventually can lead to connection

failure.

Thread Height

Proper thread height maximizes theperformance of the connection. Threadheight is also an API requirement.

The JSS Thread Height Gages provideimmediate feedback on how the threadheight compares to the specificationrequirements. A shallow thread height

may allow the connection to pull apartunder critical loads.

Pitch Diameter

Pitch diameter is the most criticalmeasurement in machining threads. TheJSS Pitch Diameter Locating Templates

and JSS Pitch Diameter Gages give youcontrol over your threading quality. Whenpitch diameters dont meet specification itallows the connection to flex while drilling,

ultimately causing galling and connectionfailure.

If you have a large investment in ring and plug gages, youcan still use them, just make sure the part is JSS good before

you thread that ring or plug gage onto the part. So whetheyou are looking for an alternative to or averification of ring and plug gages, choosejoint strength over connection failure bychoosing the Joint Strength System.

With the basic JSS gage package, you will be able to inspectany rotary shouldered connector without the use of a ring or

plug gage. Right hand or left hand, it doesnt matter, thesegages dont care. Also, JSS provides a method to control allthe features that make a connector perform properly. Thesystem checks thread cone taper, thread lead, thread height,thread form, and pitch diameter at the pitch plane. If you dohave a problem, youll know where to find it.

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Strength System

STEP 4 STEP 5 STEP 6


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TDWIN TAPER is the perfect accessory to the JSS . It is theonly software program dedicated to the manufacturing andinspection of downhole tubular connections. It has everythinyou need to machine, inspect, and document tubularconnection threads.

TDWIN TAPER displays connection drawings, inspection gaginformation, and setup and inspection reports. Simply, it is amust have for any machine shop.

Maintain the highest quality. Save time and money bycalibrating gages in-house. Our MIC TRAC calibration

packages are perfect for any and all in-house calibrationneeds. The MT-3000 is excellent for the shop floor, while

the MT-4000 can meet higher precision requirements.

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Gagemaker LP, P.O. Box 87709, Houston, Texas 77287-7709712 East Southmore Ave., Pasadena, Texas 77502

Phone: 713-472-7360 Fax: 713-472-7241Email: [email protected]


rotary sub-thread checking procedure-jssbrochure[1]

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