Patent ID: 8100176

Claim:
A device for liquid removal from a drilled hole equipped for gas production from an underground accumulation, comprising: an outer cylindrical liner ( 1 ) secured at the outer cylindrical liner's upper end ( 2 ) and lower end ( 3 ) by means of joints within a gas flow tubing string ( 6 ); a pair of inner cylindrical liners ( 4 , 5 ) secured within the outer cylindrical liner, the inner cylindrical liners comprising: a long lower liner ( 4 ) having a beveled upper end (b) and secured by a junction at a lower end of the long lower liner to the outer cylindrical liner near the lower end of the outer cylindrical liner, thereby forming an accumulation chamber (a) between the lower liner and the outer cylindrical liner; and a short upper liner ( 5 ) having an outwards flared lower end (e) and secured by a junction at an upper end of the long lower liner to the outer cylindrical liner near the upper end of the outer cylindrical liner, the inner cylindrical liners disposed within the outer cylindrical liner to leave a space (d) between the upper end of the lower liner and the lower end of the upper liner, the space communicating with the accumulation chamber; a letter “M”-shaped short-circuiting pipe ( 7 ) passing around the outside of the lower inner liner in the proximity of and below the upper end of the lower inner liner, the short-circuiting pipe comprising short vertical portions (j, k) secured to and communicating at their lower ends with elbows ( 1 , m), of a letter “M”-shaped discharge path ( 8 ) passing around the outside of the lower inner liner, the elbows communicating by short inner vertical portions (p, q) and a short horizontal portion (r), the first elbow (m) further communicating by a first long vertical portion (o) connected to curved end (s) through window (t) in the lower inner liner to the gas flow tubing string, and the second elbow (l) communicating by a second long vertical portion (n) to the accumulation chamber.