US 12,270,281 B2
Wiper dart having a bi-diameter wiper cup with protruding ring
Shobeir Pirayeh Gar, Houston, TX (US); Lonnie Carl Helms, Houston, TX (US); Gavin Graff, Houston, TX (US); and Xiaoguang Allan Zhong, Singapore (SG)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Oct. 24, 2023, as Appl. No. 18/493,468.
Application 18/493,468 is a continuation in part of application No. 18/466,159, filed on Sep. 13, 2023.
Prior Publication US 2025/0084732 A1, Mar. 13, 2025
Int. Cl. E21B 37/04 (2006.01)
CPC E21B 37/045 (2013.01) 20 Claims
OG exemplary drawing
 
1. A wiper dart comprising:
an inner mandrel; and
a wiper cup located circumferentially around the outside of the inner mandrel, wherein the wiper cup has a first outer diameter and a second outer diameter, wherein the first outer diameter is different from the second outer diameter, wherein a protruding ring is located circumferentially around the wiper cup at the first outer diameter, wherein the first outer diameter seals and wipes an inside of a tool joint and the second outer diameter seals and wipes an inside of a pipe section, and wherein patterned, circumferentially spaced folds are created adjacent to the second outer diameter when the wiper cup passes through the tool joint.