Weatherford Drilling Acme Mod. Housing

Thread Gauge Training

Instructor: Ian McDonald

MOTOR SECTIONMOTOR SECTION

GAUGES: Gagemaker JSS SystemGAUGES: Gagemaker JSS System

Pin M14-33-2 and Box M14-33-1Pin M14-33-2 and Box M14-33-1

5.925-4-1.25-.100D-.116RW 5.925-4-1.25-.100D-.116RW

What JSS can do for you!

• Eliminate costly ring and plug gauges.• Quantify your connections interferences.• Quantify your ring & plug sizes for wear.• Eliminate delays at vendors due to lack of

gages.• Eliminates inaccurate home made soft gages.• Can inspect used connections for Fatigue and

wear.

Connection Sizes were derived by the crest diameter at the pin shoulder.

5.925-4 Acme Mod. Connectors

Thread Form AssembledPin root and Box crest interfere

and both load flanks

Now lets measure the Pin Connection

The JSS Acme Calculator handles.A. Measure pin no drawingB. Measure box no drawingC. Measure pin with drawingD. Measure box with drawing

Do we have connection drawings that have the following?Pin Crest or Root diameters at the shoulder?

Pin Crest Diameter

Pin Thread Height

A Pin Connection Measured - JSS Ball PD

MIC Under Ball (MUB) acquired from JSS measurement Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft.

Threads Per Inch (TPI) 4 (thds/ in)

JSS Gage Plane (LPP dimension) 0.875 in. Root Diameter of Pin at Shoulder

Measured Mic Under Ball (MUB) @ JSS Gage Plane 5.6397 in. 5.7360 in

B Box Connection Measured - MRP Crest Diameter Resulting Interference -0.005

A&B Dimension acquired from MRP measurement Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft. Projected Crest Diameter at Box Face

Threads Per Inch (TPI) 4.00 (thds/ in) 5.7310

in

Gage Plane (center of MRP shoe location) Calculated 0.875 in.

Measured MRP A & B dimensions A 5.6405 B 0.5625 in.

C Pin Connection - Input from Drawing OutputsCrest Diameter Acquired from Pin Print Inputs Units Root Diameter of Pin at Shoulder

Taper Per Foot (TPF) 1.25 in./ft. 5.7360

Threads Per Inch (TPI) 4 (thds/ in) in

JSS Gage Plane (LPP dimension) 0.875 in. Calculated Mic Under Ball (MUB) @ JSS Gage Plane

Thread Height 0.100 in. 5.6397 in

Crest Diameter of Pin at shoulder 5.936 in.

D Box Connection-Input from Drawing Design interference: -0.005

Crest Diameter aquired from Box Drawing Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft. Crest Diameter at Face of Box

Threads Per Inch (TPI) 4 (thds/ in) 5.7310 in

Gage Plane (center of MRP shoe location) 0.875 in.

Crest Diameter @ Face of Box - NOT THE BLANKING DIM. 5.731 in. MRP A & B Setting Dimensions

If Crest Diameter is not available, typical interference is -0.005" 5.6405 0.5625

Power Section Acme Mod. Calculator for Connections

The JSS Calculator is used to calculate the gauge setting values to measure the pin and box connections with or with out product drawings.

Sizing the pin connection.Rings and JSS pitch diameter gauges both measure

the root diameter.

The LPP template locates a gauge plane .875” off the pin shoulder from which to measure the pitch diameter.

Using the LPP template to locate the gauge plane on a pin.Place the template into the thread and rotate around the pin thread until it

makes contact with the shoulder. Using a sharpie mark the thread next to the notch on the template.

PD-8001 Measuring the root diameter at .875” off the shoulder. Place the fixed ball at the sharpie mark and position the indicator ball down the taper groove.

Now lets measure the Box Connection

The JSS Acme Calculator handles.A. Measure pin no drawingB. Measure box no drawingC. Measure pin with drawingD. Measure box with drawing

Do we have connection drawings that have the following?Box Crest diameters at the face or shoulder?NO Box Blanking diameters.

A Pin Connection Measured - JSS Ball PD

MIC Under Ball (MUB) acquired from JSS measurement Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft.

Threads Per Inch (TPI) 4 (thds/ in)

JSS Gage Plane (LPP dimension) 0.875 in. Root Diameter of Pin at Shoulder

Measured Mic Under Ball (MUB) @ JSS Gage Plane 5.6397 in. 5.7360 in

B Box Connection Measured - MRP Crest Diameter Resulting Interference -0.005

A&B Dimension acquired from MRP measurement Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft. Projected Crest Diameter at Box Face

Threads Per Inch (TPI) 4.00 (thds/ in) 5.7310

in

Gage Plane (center of MRP shoe location) Calculated 0.875 in.

Measured MRP A & B dimensions A 5.6405 B 0.5625 in.

C Pin Connection - Input from Drawing OutputsCrest Diameter Acquired from Pin Print Inputs Units Root Diameter of Pin at Shoulder

Taper Per Foot (TPF) 1.25 in./ft. 5.7360

Threads Per Inch (TPI) 4 (thds/ in) in

JSS Gage Plane (LPP dimension) 0.875 in. Calculated Mic Under Ball (MUB) @ JSS Gage Plane

Thread Height 0.100 in. 5.6397 in

Crest Diameter of Pin at shoulder 5.936 in.

D Box Connection-Input from Drawing Design interference: -0.005

Crest Diameter aquired from Box Drawing Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft. Crest Diameter at Face of Box

Threads Per Inch (TPI) 4 (thds/ in) 5.7310 in

Gage Plane (center of MRP shoe location) 0.875 in.

Crest Diameter @ Face of Box - NOT THE BLANKING DIM. 5.731 in. MRP A & B Setting Dimensions

If Crest Diameter is not available, typical interference is -0.005" 5.6405 0.5625

Power Section Acme Mod. Calculator for Connections

The JSS Calculator is used to calculate the gauge setting values to measure the pin and box connections with or with out product drawings.

Box Crest at Shoulder

Box Crest Thread Height

Sizing the box connection.MRP-2002 and Working Plug measure the box crest diameter.

Working plug contacts the box thread crest and clears the root.

MRP-2002 gauge is used to measure the box crest diameter at .875” off the face. We do not use ball contacts on the major diameter since the thread crest interferes with the pin roots.

Using a .5625” set block to position the shoe center at .875” off the face.

Insert the gauge into the box and measure the crest diameter.

The Master and Working Plugs are made to the same dimensions.Both are dimensioned to size the box crest at the face.

The Master Plug sizes the Working ring.The Standoff value of the working ring to the master plug is .450”.When the working ring is threaded on to a pin connection the standoff

value is .500”. This creates the .005” interference in the connection.

Below is the order sequence for sizing the final pin and box connections.

Ring and Plug Gauge Calibration

The JSS Calculator is used to calculate the gauge setting values to measure the ring and plug gages with or with out product drawings.

E Plug Gauge Measured - JSS Ball PD

MIC Under Ball (MUB) acquired from JSS measurement Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft. Box Crest Diameter at the face produced by measured plug

Threads Per Inch (TPI) 4 (thds/ in) 5.7310 in

JSS Gage Plane (LPP dimension) 0.875 in.

Measured Mic Under Ball (MUB) @ JSS Gage Plane 5.6347 in. Calculated interference between a pin & box produced by

using these ring & plug gages: -0.005

F Ring Gauge Measured - MRP Crest Diameter

A&B Dimension acquired from MRP measurement Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft.

Threads Per Inch (TPI) 4 (thds/ in) 5.7362 in.

Gage Plane (center of MRP shoe location) Calculated 0.875 in.

Measured MRP A & B dimensions A 5.5936 B 0.5625 in.

OutputsG Plug Gauge - Input from Drawing Calculated Mic Under Ball (MUB) @ JSS Gage Plane

Crest Diameter Acquired from Plug Print Inputs Units 5.6347

Taper Per Foot (TPF) 1.25 in./ft.Root Diameter of Plug at Shoulder and Crest Diameter at Face of Box Produced by this plug

Threads Per Inch (TPI) 4 (thds/ in) 5.7310 in

JSS Gage Plane (LPP dimension) 0.875 in.

Crest Diameter of Plug at shoulder 5.93100 in. Calculated interference between a pin & box produced by -0.005

using these ring & plug gages:

H Ring Gauge - Input from Drawing

A&B Dimension acquired from MRP measurement Inputs Units OutputsTaper Per Foot (TPF) 1.25 in./ft.

Threads Per Inch (TPI) 4 (thds/ in) Root Diameter of Pin Produced by this ring gauge 5.7362

Gage Plane (center of MRP shoe location) 0.875

Crest Diameter @ Face of Ring 5.6841

5.5936 0.5625

MRP A & B Setting Dimensions

Pin Root Diameter at Shoulder - produced by this ring

Power Section Acme Mod. Calculator for Ring & Plugs

Master Ring on Master Plug

Master Plug Gauge

Master Ring Gauge

Working Gauges must have Master Ring and Plugs to calibrate them for wear!

Input the Crest Diameter of Plug at Wear Ring Face = 5.931”.

Subtract (2) thread heights and it produces the box crest at the

shoulder = 5.731”

Input the Crest Diameter at Face of Ring = 5.6841”.

This sizes the pin root at .500” off the shoulder

.050” less standoff to Master Plug is what

creates the connections .005”

interference.

Master Plug calibrates the working ring gauge.

The tool steel block projects the plug gage face outward for the LPP template to contact.

The JSS system can calibrate your plug gauges and measure your pin connections too!

The steel block mimics a pin shoulder, creating a reference point or datum to locate the gage plane for inspection

PD-8001 Measuring the plug gauge root diameter at .875”

MRP-2002 measuring the ring crestdiameter at .875” off the face.

The JSS system can calibrate your ring gauges and measure your box connections.

Level 30 Thread and Gauge Designer figuring all this out. Note the lack of hair!!!!

There has to be a way to explain this

mess!!!

The 8 steps were created!!A New Acme Gauge Setting

Calculator was born!!A. Measure pin no drawingB. Measure box no drawingC. Measure pin with drawingD. Measure box with drawingE. Measure plug no drawingF. Measure ring no drawingG. Measure plug with drawingH. Measure ring with drawing