摘要:
A rotating breech lock rotates tubing to distribute wear caused by a rotating or reciprocating rod of an artificial lift system. The rotating breech lock has a spool that disposes on a wellhead. A bowl element disposes in the spool's bore, and a hanger fits into the spool and lands on the bowl element with a thrust bearing. Above the hanger, a load ring fits against the hanger with a bearing, and a hold-down sleeve and locking pins hold the load ring against the hanger. The spool has a worm that mates with a wheel defined about the hanger so turning the worm by a ratchet or other mechanism rotates the hanger. Internally, the hanger has a bore with opposing shoulders separated by gaps. A mandrel couples to the tubing and disposes up into the hanger. Protrusions or keys on the hanger can selectively align with the gaps and the shoulders depending on how the mandrel is rotated in the hanger bore.
摘要:
Apparatus, methods, and systems for in-line detection of chemical compounds in beer are provided. In these apparatus, methods, and systems, a small sample of wort is removed from a fermentation vessel, heated, analyzed by infrared attenuated total reflectance (IR-ATR) spectroscopy, and returned to the fermentation vessel. The concentrations of one or more chemical compounds in the wort can be ascertained directly from IR-ATR spectroscopy data, or indirectly from applying an algorithm to the IR-ATR spectroscopy data based on known reaction kinetics and stoichiometry. The apparatus, methods, and systems do not destroy the wort sample or contaminate the fermenting wort and so can be employed continuously during fermentation, and are rapid, accurate, and inexpensive.
摘要:
A rotating breech lock rotates tubing to distribute wear caused by a rotating or reciprocating rod of an artificial lift system. The rotating breech lock has a spool that disposes on a wellhead. A bowl element disposes in the spool's bore, and a hanger fits into the spool and lands on the bowl element with a thrust bearing. Above the hanger, a load ring fits against the hanger with a bearing, and a hold-down sleeve and locking pins hold the load ring against the hanger. The spool has a worm that mates with a wheel defined about the hanger so turning the worm by a ratchet or other mechanism rotates the hanger. Internally, the hanger has a bore with opposing shoulders separated by gaps. A mandrel couples to the tubing and disposes up into the hanger. Protrusions or keys on the hanger can selectively align with the gaps and the shoulders depending on how the mandrel is rotated in the hanger bore.
摘要:
A series of bis-acridinyl DNA intercalating agents with anticancer cell activity represented by formula (I), where Z is a linear arrangement of multiple aromatic rings, containing at least three aromatic rings, or at least two alicyclic rings, said rings being linked in a 1,4 or 1,3 manner are provided. Methods of inhibiting cancer cells and treating patients having cancer with these agents are also provided.
摘要:
Apparatus, methods, and systems for in-line detection of chemical compounds in beer are provided. In these apparatus, methods, and systems, a small sample of wort is removed from a fermentation vessel, heated, analyzed by infrared attenuated total reflectance (IR-ATR) spectroscopy, and returned to the fermentation vessel. The concentrations of one or more chemical compounds in the wort can be ascertained directly from IR-ATR spectroscopy data, or indirectly from applying an algorithm to the IR-ATR spectroscopy data based on known reaction kinetics and stoichiometry. The apparatus, methods, and systems do not destroy the wort sample or contaminate the fermenting wort and so can be employed continuously during fermentation, and are rapid, accurate, and inexpensive.