Weatherford Drilling Acme Mod. Housing Thread Gauge Training Instructor: Ian McDonald
Dec 17, 2015
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