TWM Basic Steps to Acquire 50K Lbs Horseshoe Load Cell �Dynamometer Data.

by

Echometer Company

Echometer How To

Reference: Well Analyzer QuickRefs, http://www.echometer.com/support/quickrefs/index.html

50k HORSESHOE TRANSDUCER�INCLUDES ACCELEROMETER

SAFE, FAST, CONVENIENT, ACCURATE LOAD & POSITION

50K Horseshoe Load Cell Package.

1. The 50K HT is wider than 2” and will work on 2.0 and smaller Polished Rods.

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• Consists of 5 parts: the spool (3 silver pieces), the 5" horseshoe transducer, the hydraulic jack, the pump with hose and the ¼ " thick spacer

Stop the Pumping Unit carefully, near the bottom of the stroke.

For safety purposes when stopping the pumping unit to attach the HT transducer, the operator should disconnect the power and set the break.

Spool & Washers Mounted on Well

1. Permanently Install Spool Assembly on the Well.

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• Spool fits over the polished rod between the carrier bar and the permanent polished clamp.

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• Spool assembly consists of an upper washer, a lower washer and a 5" long (2" OD) steel tube, that separates the two washers.

Connect the cables to Well Analyzer.

Far end on the coiled cable is attached to the 25-foot Y-cable or Straight cable, that is connected into the MAIN INPUT on the Well Analyzer.

Turn on Well Analyzer and wait for GREEN LED.

Turn on the computer.

Start TWM in Acquire Mode

1. Select the Equipment Check tab.

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2. The display of internal battery voltage and battery temperature indicate that the computer is communicating with the well analyzer’s internal electronics and sensor measurements may be acquired.

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Select the Dynamometer Sensor tab.

1. Select the serial number of the 50k HT, Horse Shoe Transducer. Use Create New… if your serial number is not found in the list. Make sure all coefficients are entered as typed on transducer label.  

2. Prior to placing the HT on the Polished Rod verify the transducer output.

Install 5" Horseshoe Transducer �and Hydraulic Jack

1. The horseshoe transducer, HT, and hydraulic jack are placed between the upper and lower washers.

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• The hydraulic jack and 5" HT are attached together by two bolts, so both are installed together.

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• Height of the jack and HT is approximately 4.9". The inner steel tube, which separates the upper washer and lower washer, is 5" in length.

Hydraulic Pump and Jack Lift Rods

1. Hydraulic pump is actuated to raise the horseshoe transducer and place the polished rod load onto the horseshoe transducer.

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• A ¼" spacer plate is inserted between the hydraulic jack and the horseshoe transducer.

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• The load remains on the horseshoe transducer when the pressure in the hydraulic jack is released.

Horseshoe Transducer Hydraulic Jack Assembly Installed on Well

1. After the spacer is inserted, hydraulic pressure on the jack is released as the hydraulic liquid is bled back into the pump

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• The polished rod load is lowered onto the horseshoe transducer, spacer plate, and the hydraulic jack.

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• The entire polished rod load is on the 5" horseshoe transducer and jack.

Use Coiled Cable with Locking Nut

1. Use a coiled cable with a locking nut to prevent the coiled cable from vibrating loose from the HT transducer connector as the polished rod travels up and down.
2. A cable is attached from the Well analyzer to the horseshoe transducer to record accurate polished rod load and also acceleration data.
3. Do NOT allow the horse head to hit the 50K HT at the top of the stroke.

Accelerometer Determines Position

1. An accelerometer is contained within the 5" horseshoe transducer.

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• The acceleration data is processed to obtain position data, so a string position transducer is not required.

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• The accelerometer does not require as much maintenance as a string type position transducer requires and is easier to use.

Acquired Acceleration of Polished Rod

Position of the polished rod is determined by twice integration of measured acceleration data.

Accelerometer is compact, convenient to use, less expensive, and more accurate than conventional string position indicators.

Coiled dynamometer cable can become tangled in wellhead.

1. Support the cable to prevent entanglement with the wellhead connections during polished rod movement.

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• One end of coiled cable is connected to the polished rod transducer and the other end of the coiled cable is suspended on the ladder or fixed object.

This setup is a safe way to protect the dynamometer cable, the cable connectors and the connector on the load cell.

TWM Software – F3 to Select Well

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1. Open Base Well File for the well where data is to be acquired. Use New… to create a Base Well File if one does not exist.

2. For acoustic surveys be sure to enter at least avg. joint length, pump and formation depths.

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Select Wellbore Tab to Verify Data

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1. From the Base Well File select the Wellbore Tab and verify the data is representative for the well.

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2. For PRT surveys be sure to enter Rod Type, Rod Length, Rod Diameter, Pump Plunger Dia., Pump Intake, Poilshed Rod Diameter, fluid gravities, and production rates.

Save Changes to Base Well File

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1. Click Save button to be sure to save changes to the base well file.

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Select Type of Data Acquisition Test

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1. Tap F4 to Select Test type to be acquired.

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2. Click the Dynamometer Tab to indicate that DYNO data will be acquired.

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3. Select F5 to Acquire Data

Click Finish for TWM Automatic Display of Relative Rod Loading

1. Click Alt-D to Record 1.0 Minute of DYNO Data.
2. Click Alt-S to START acquiring data for a specific length of time.
3. Click Alt-Q to STOP acquiring DYNO data.

Click Save Button�to Store TWM Data in File

1. After 1 Minute or Alt-Q button is clicked, TWM prompts user to save recorded test data.
2. Two fields are available for the user to enter description for the session.
3. Click Save button to store acquired data.

Selecting Finish Starts Acquiring Dynamometer �Load, Acceleration, Power, Current Data

DYNAMOMETER SURVEY ANALYSIS �ANSWERS THE FOLLOWING QUESTIONS:

1. Is the well pumped off?
2. What is the pump intake pressure?
3. What is the pump fillage? And pump displacement?
4. What is the current pumping speed?
5. Are the traveling and/or standing valves leaking?
6. Are the maximum and minimum rod loads within limits?
7. What is the polished rod and pump horsepower?
8. Is the gearbox overloaded? Is the unit properly balanced?
9. What movement of the counterweights will balance the unit?
10. Is the downhole gas separator operating effectively?

Dynamometer Surface Card�And Pump Card Analysis:

ROD LOADING WITHIN LIMITS?

Are Traveling And Standing� Valve Loads OK?

After the dynamometer test, the horseshoe transducer, hydraulic jack and spacer are removed in reverse manner leaving the spool on the well for another test when desired.��