Combined lift plug, pick-up sub and thread protector for rotary drill collars
US D194437 S
Description (OCR text may contain errors)
United States Patent 0 Des. 194,437 Patented Jan. 22, 1963 "ice COMBINED LIFT PLUG, PICK-UP SUB AND THREAD PROTECTOR FOR ROTARY DRILL COLLARS James Kirk Salter, 1301 W. Park Ave., Eunice, La.
Filed July 25, 1961, Ser. No. 66,066
Term of patent 14 years (on. D54-4) FIGURE 1 is a side elevational view of a combined lift plug, pick-up sub and thread protector for rotary drill collars.
FIGURE 2 is a top plan view.
FIGURE 3 is a bottom plan view thereof.
The ornamental design for a combined lift plug, pickup sub and thread protector for rotary drill collars, substantially as shown.
References Cited in the file of this patent Composite Catalog of Oilfield and Pipeline Equipment, 17th (1950) edition, volume II, page 3640, Oilfield Machine & Supply Co. advertisement, Box type thread protcctor, bottom center of page.
Composite Catalog of Oilfield and Pipeline Equipment, 17th (1950) edition, volume I'I, page 3700, Oil Well Mfg. Co. advertisement, Hammer Wing Nut, Upper right corner of page.