Well tubing and tubing collar therefor

Details Well tubing and tubing collar therefor Well tubing and tubing collar therefor

1991-11-18

1994-11-01

Britts, Ramon S.

Wells

With eduction pump or plunger

Having sediment trap or deflector

166242, E21B 4300

Patent

active

053600622

ABSTRACT:
A well tubing includes an insert nipple for receiving a hold-down projection of an insert pump. The tubing includes a tubing collar threadingly interconnecting the upper end of the insert nipple with the next upper tubing section. The tubing collar includes a tapered inner bore which becomes progressively larger in cross-section in the upward direction to provide, around the outside of the hold-down projection, a space of gradually enlarged volume for receiving debris as the insert pump is lifted from the well tubing, thereby preventing the pump from becoming stuck.

REFERENCES:
patent: 3789923 (1974-02-01), Garrett
patent: 4332533 (1982-06-01), Spears
patent: 4440231 (1984-04-01), Martin
patent: 4629402 (1986-12-01), Marshola
patent: 4880062 (1989-11-01), Bland et al.
patent: 5005651 (1991-04-01), Burrows

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