Patent Publication Number: US-3874446-A

Title: Tubing hanger releasing and retrieving tool

Description:
United States Patent 1191 Crowe TUBING HANGER RELEASING AND RETRIEVING TOOL [75] Inventor:  
 [73] Assignee: Baker Oil Tools, Inc., Los Angeles,  
 Calif.  
 [22] Filed: June 3, 1974 [2]] Appl. No.: 475,427  
 Related US. Application Data [62] Division of Ser. No. 275,91 l, July 28, I972, Pat. No. 3,830,295, which is a division of Ser. No. 243,806, April 13, I972, Pat. No. 3,771,603.  
 Talmadge L. Crowe, Houston, Tex.  
 [52] US. Cl 166/129, 166/182, 166/189, [66/237 [511 Int. Cl ..E2lb 23/00 [58] Field of Search 166/123, 124, 125, 181, 166/182, 212, 237, I89  
 [56] References Cited UNITED STATES PATENTS 3,!99906 8/1965 Chenoweth 166/125 E :l01 44a 41/ i i m z 445- 3 N t Z 2 2 t 4 \r} j -446 W427 452 1330 L 2s 2 ,3  
 ie x C?! 1111 3,874,446 Apr. 1, 1975 7/l97l Brown et al. [66/125 7/1972 Crockwell et al &#34;16/123 [57] ABSTRACT A tool for releasing and retrieving a tubing hanger, and the like, anchored in a well casing disposed in a well bore, the tool being connectible to a running string for lowering into the well casing toward the tubing hanger and being oriented upon engaging the tubing hanger to a predetermined rotational position, latch means of the tool being coupled to the tubing hanger, enabling an upward pull to be taken on the running string and tool for application to the tubing hanger to effect its release from the well casing and its retrieval from the well casing.  
 11 Claims, 47 Drawing Figures APR&#39; 1 ms 3.874.446  
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