Methane Gas Wellhead

Abstract

A methane gas wellhead, having: a body having a pair of side outlets and a top outlet; a mandrel dimensioned to be received into the top outlet; and a cover plate dimensioned to be received over the mandrel, and to hold the mandrel in the top outlet when the cover plate is secured to the top of the body; or a body having a pair of side outlets and a top outlet; and a mandrel dimensioned to be received into the top outlet, wherein the mandrel is a negative pressure mandrel, and wherein the top outlet and the mandrel are dimensioned to receive an O-ring seal therebetween.

1 . A methane gas wellhead, comprising:
 a body having a pair of side outlets and a top outlet;   a mandrel dimensioned to be received into the top outlet; and   a cover plate dimensioned to be received over the mandrel, and to hold the mandrel in the top outlet when the cover plate is secured to the top of the body.   
   
   
       2 . The methane gas wellhead of  claim 1 , wherein the mandrel is a positive-pressure mandrel. 
   
   
       3 . The methane gas wellhead of  claim 1 , wherein the mandrel is a negative-pressure mandrel. 
   
   
       4 . The methane gas wellhead of  claim 1 , wherein the body has a bottom threaded end. 
   
   
       5 . The methane gas wellhead of  claim 1 , wherein the interior of the side outlets is threaded. 
   
   
       6 . The methane gas wellhead of  claim 2 , wherein the positive pressure mandrel comprises:
 at least one O-ring disposed around the mandrel.   
   
   
       7 . The methane gas wellhead of  claim 6 , wherein the at least one O-ring is a pair of O-rings. 
   
   
       8 . The methane gas wellhead of  claim 2 , wherein the positive pressure mandrel comprises:
 a pair of openings passing therethrough, the pair of openings comprising a first opening dimensioned to connect to a water line, and a second opening dimensioned to connect to electrical connections.   
   
   
       9 . The methane gas wellhead of  claim 1 , wherein the cover plate is a two piece cover plate. 
   
   
       10 . The methane gas wellhead of  claim 1 , wherein the body comprises a ring groove dimensioned to receive an O-ring therein, when an O-ring is positioned between the top of the body and the cover plate. 
   
   
       11 . The methane gas wellhead of  claim 1 , wherein the body comprises a plurality of radial apertures, and further comprising a plurality of radial fasteners dimensioned to be received into the radial apertures. 
   
   
       12 . The methane gas wellhead of  claim 11 , wherein the radial fasteners and the mandrel are dimensioned such that the radial fasteners are received into a notch on the side of the mandrel. 
   
   
       13 . The methane gas wellhead of  claim 1 , further comprising:
 a plurality of bolts passing through holes in the top of the body and the cover plate, thereby bolting the cover plate onto the top of the body.   
   
   
       14 . The methane gas wellhead of  claim 1 , wherein each of the pair of side outlets are threaded. 
   
   
       15 . The methane gas wellhead of  claim 1 , wherein each of the pair of side outlets are flanged. 
   
   
       16 . The methane gas wellhead of  claim 1 , wherein the top outlet is flanged. 
   
   
       17 . The methane gas wellhead of  claim 1 , wherein the wellhead is designed for use with a low pressure, oxygen free coal bed methane source. 
   
   
       18 . A methane gas wellhead, comprising:
 a body having a pair of side outlets and a top outlet; and   a mandrel dimensioned to be received into the top outlet, wherein the mandrel is a negative pressure mandrel, and wherein the top outlet and the mandrel are dimensioned to receive an O-ring seal therebetween.   
   
   
       19 . The methane gas wellhead of  claim 18 , wherein at least one of the bottom end or side outlets is threaded. 
   
   
       20 . The methane gas wellhead of  claim 18 , wherein the negative pressure mandrel comprises:
 a pair of openings passing therethrough, the pair of openings comprising a first opening dimensioned to connect to a water line, and a second opening dimensioned to connect to electrical connections.   
   
   
       21 . The methane gas wellhead of  claim 18 , further comprising:
 a plurality of bolts passing through holes in the top of the body and the negative pressure mandrel, thereby bolting the negative mandrel onto the top of the body.   
   
   
       22 . The methane gas wellhead of  claim 18 , wherein each of the pair of side outlets are threaded or flanged.