US2009057028A1PendingUtilityA1

Downhole Draw Down Pump and Method

45
Individually held — no corporate assignee on recordPriority: Sep 10, 2003Filed: Nov 12, 2008Published: Mar 5, 2009
Est. expirySep 10, 2023(expired)· nominal 20-yr term from priority
Inventors:Danny T. Williams
E21B 43/13E21B 17/18E21B 43/006
45
PatentIndex Score
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Cited by
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Claims

Abstract

An apparatus for drawing down a fluid level in a wellbore. The apparatus comprises a first tubular disposed within the wellbore so that a wellbore annulus is formed. The apparatus further includes an annular nozzle operatively attached to the first tubular, and wherein the annular nozzle comprises: an annular adapter; and, a suction tube that extends from the annular member into an inner portion of the first tubular. The apparatus further comprises a second tubular concentrically disposed within the first tubular so that a micro annulus is formed therein. The apparatus may further contain a jetting device for delivering an injected medium injected from the micro annulus into the wellbore annulus, and a stabilizer that stabilizes the second tubular within the first tubular. A method of drawing down a fluid level is also disclosed.

Claims

exact text as granted — not AI-modified
1 . An apparatus for use in a wellbore, the apparatus comprising:
 a first tubing member disposed within the wellbore so that a wellbore annulus is formed therein, the first tubing member having a suction tube device at a first end, and wherein said suction tube device extends into an inner portion of said first tubing member;   a second tubing member disposed within said first tubing member so that a micro annulus is formed therein, wherein a first end of said second tubing member is positioned about said suction tube device, and wherein said suction tube is in communication with said wellbore annulus.   
   
   
       2 . The apparatus of  claim 1  further comprising stabilizer means, disposed about said second tubing member, for stabilizing said second tubing member within said first tubing member. 
   
   
       3 . The apparatus of  claim 2  further comprising jet means, disposed within said first tubing member, for delivering an injected medium from said micro annulus into the wellbore annulus. 
   
   
       4 . The apparatus of  claim 3  further comprising:
 means, disposed at the surface, for injecting the injection medium into said micro annulus.   
   
   
       5 . The apparatus of  claim 4  further comprising an inner tubing restriction sleeve disposed within said second tubing member and wherein said suction tube device extends into said inner tubing restriction sleeve. 
   
   
       6 . The apparatus of  claim 5  wherein said injection medium is selected from the group consisting of gas, air, or fluid. 
   
   
       7 . The apparatus of  claim 5  wherein said wellbore intersects and extends past a coal bed methane gas seam so that a sump portion of the wellbore is formed. 
   
   
       8 . The apparatus of  claim 7  wherein the apparatus is placed at a position below the coal bed methane gas seam. 
   
   
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