TY - JOUR
AU - Khlebopros, D.
AB - The well head has four branches, two of which are intended for attachment to pumping units. The other two branches carry a sampling valve to connect the pipes with the atmosphere, the safety valve, and a manom- eter. The space between the well-head housing and the pump and compressor tubes is hermetically sealed with a rubber collar which allows the lowering and lifting of pipes with couplings without dehermetization of the well. The pipe head has three branches, two of which are connected to the pumping aggregates. The third branch carries a sampling valve to connect the pump and compressor pipes to the atmosphere. A pipe with a coupling is screwed from the to~ ~_nto the pipe head so that it can be caught by the lifting gear. The pipe finishes in a quick-assembly joint for connection of the distributor with the manometer. The shut-off fittings represent easily operable sampling valves with a cylindrical plug. The well fittings are assembled from individual portable units by means of quick-assembly joints. The fittings are universal and can be used for the hydraulic rupture of formations, hydrosand-blasting operations, acid treatment, well cementation in major overhauls, and the flushing of sand plugs. The 
TI - Bellows-operated control valve
JF - Chemical and Petroleum Engineering
DO - 10.1007/BF01143802
DA - 2005-01-28
UR - https://www.deepdyve.com/lp/springer-journals/bellows-operated-control-valve-OpGK0aqA6h
SP - 295
EP - 297
VL - 14
IS - 4
DP - DeepDyve
ER -