[12] Patent
[11] Patent No.:GC0007565  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/125998
Date of the Decision to Grant the Patent:15/Apr/2018

[21] Application No.:GC 2013-25746

[22] Filing Date:6/11/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
US
6/11/2012
7/8/2013
61/722,884
13/960,903

[72] Inventor: Ronald G. PETERSON

[73] Owner: UNICO LLC, 3725 Nicholson Road, Franksville, Wisconsin 53126-0505, USA

[74] Agent: Abu-Gazaleh Intellectual Property L.L.C

  

 

  

[51]IPC:
E21B 43/12, 43/16, 47/008

[56] Cited Documents:

-US 2006-0251525 A1 (BECK et al.) 09 November 2006
-US 4,541,274 A (PURCUPILE, JOHN C.) 17 September 1985
-US 2008-0240930 A1 (PALKA et al.) 02 October 2008
-US 2006-0067834 A1 (BOYER et al.) 30 March 2006
-US 6,343,656 B1 (VAZQUEZ et al.) 05 February 2002
 
Examiner: Eng. Saleh M. AlAqil

[54] APPARATUS AND METHOD OF REFERENCING A SUCKER ROD PUMP
[57] Abstract: There is provided a method and system to determine the position of a sucker rod pumping system without a position sensing device during production pumping. A pump control system of the sucker rod pumping system includes a controller coupled to a database, with the controller configured to access an rxless torque value in the database. With the stored rxless torque value representative of toggle points of the crank arm during an initial calibration pumping cycle, the controller further is configured to continuously sample the rxless torque value of the system and determine the crank arm position in relation to the sample rxless torque value. The controller adjusts the pumping system for optimal operations, without a crank arm position sensor during production pumping by identifying a toggle point and setting the crank arm position estimate equal to the value corresponding to the crank position at the identified toggle point.
No. of claims: 10     No. of figures: 10


 

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