US 12,241,335 B1
Backflow gas heating and throttling device, and surface throttling system
Jianxin Luo, Chengdu (CN); Wang Yu, Chengdu (CN); and Jun Chen, Chengdu (CN)
Assigned to Southwest Petroleum University, Chengdu (CN)
Filed by Southwest Petroleum University, Chengdu (CN)
Filed on Jul. 29, 2024, as Appl. No. 18/787,595.
Claims priority of application No. 202410064727.X (CN), filed on Jan. 16, 2024.
Int. Cl. E21B 34/02 (2006.01); E21B 36/00 (2006.01)
CPC E21B 34/025 (2020.05) [E21B 36/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A backflow gas heating and throttling device, comprising a gas inlet pipe, a heat pipe, a guide cone, an outer throttle pipe, an annular cover, a tapered pipe, a gas outlet pipe, a throttle plate I, a throttle plate II, and a heating rib, wherein
the gas inlet pipe, the heat pipe, and the outer throttle pipe are arranged coaxially in sequence from the inside to the outside, with right ends of the three being flush and the length of the heat pipe smaller than that of the outer throttle pipe and the gas inlet pipe; the heat pipe and the gas inlet pipe are connected through a support column I, and a left end of the outer throttle pipe is connected to the gas inlet pipe through the annular cover; a heating annulus is formed between the gas inlet pipe and the heat pipe, a throttling annulus is formed between the heat pipe and the outer throttle pipe, and a transition zone is formed between the annular cover and a left end of the heat pipe;
the guide cone is arranged parallel to the tapered pipe, a left end of the guide cone is connected to the right end of the heat pipe, and a left end of the tapered pipe is connected to the right end of the outer throttle pipe; a constant pressure confluence zone is formed between the guide cone and the tapered pipe;
a left end of the gas outlet pipe is connected to a right end of the tapered pipe; and
the throttle plate I, the throttle plate II, and the heating rib are all arranged on an outer wall of the heat pipe, wherein the throttle plate II is arranged on a right side of the throttle plate I, and the heating rib is arranged on a right side of the throttle plate II.