Claims
- 1. For use on the lower end of a string of tubing suspended in a casing in a borehole in an oil well, an improved apparatus for reducing the entrance of sand into a bottom hole pump, comprising:
- a seating nipple secured at its upper end to the lower end of a string of tubing, the seating nipple having an interior configuration to receive and support a sucker rod actuated bottom hole pump therein, the seating nipple having internal threads at the lower end thereof;
- a mud anchor having external threads on the upper end thereof threadably engaging said seating nipple lower internal threads whereby the mud anchor is secured to the lower end of said seating nipple and extends coaxially downwardly therefrom, the mud anchor being tubular and of internal diameter greater than the external diameter of a bottom hole pump to be received and supported in said seating nipple, the mud anchor having perforations therein through which fluid flows;
- spacers affixed in spaced apart relationship to the external surface of the lower end of said seating nipple;
- a tubular sand shield secured at its inner periphery of its upper end to said spacers affixed to the lower end of said seating nipple whereby the sand shield extends coaxially downwardly from said seating nipple, the sand shield coaxially receiving said mud anchor therein and having an internal diameter greater than the external diameter of said mud anchor providing a vertical annular area therebetween, the vertical annular area having an upper portion, the lower end of the sand shield being below the lowest perforations in said mud anchor whereby fluid from the well borehole must flow upwardly in said annular area to enter into said mud anchor and thence into a pump operated within the mud anchor, the upper end of said annular area being open between said spacers providing communication between the upper portion of said annular area with the interior of said casing for the passage of gas directly upwardly therethrough.
CROSS-REFERENCE
This is a continuation-in-part of application Ser. No. 422,706 filed Sept. 24, 1982, entitled "Sand Shield For Bottom Hole Pumps", now abandoned.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
422706 |
Sep 1982 |
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