US 12,467,576 B2
Multi-diameter cleaning pig
Marcelo Da Cruz Rodrigues, Rio de Janeiro (BR); Eduardo Teixeira Da Silva, Rio de Janeiro (BR); Andre Luiz Guedes Maricato, Rio de Janeiro (BR); Volney Soares Lopes, Rio de Janeiro (BR); Ricardo Risso Chaves, Itajubá (BR); Marcos Aurélio De Souza, Itajubá (BR); and Marcelo Tai, Jr., Itajubá (BR)
Assigned to PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and UNIVERSIDADE FEDERAL DE ITAJUBÁ—UNIFEI, Itajubá (BR)
Filed by PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and UNIVERSIDADE FEDERAL DE ITAJUBÁ—UNIFEI, Itajubá (BR)
Filed on May 25, 2023, as Appl. No. 18/324,055.
Claims priority of application No. 10 2022 010400 0 (BR), filed on May 27, 2022.
Prior Publication US 2023/0400140 A1, Dec. 14, 2023
Int. Cl. F16L 55/44 (2006.01); B08B 9/043 (2006.01); F16L 55/28 (2006.01); F16L 101/12 (2006.01)
CPC F16L 55/44 (2013.01) [B08B 9/0436 (2013.01); F16L 55/28 (2013.01); F16L 2101/12 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A multi-diameter cleaning pig, comprising:
a plurality of seals;
a nose connected to a first seal of the plurality of seals;
a rigid coupling pipeline connected between the first seal and a second seal of the plurality of seals;
a first mechanical module and a second mechanical module, wherein each of the first and second mechanical modules comprises six centralizing arms arranged in two sets of three arms positioned in two different planes along a shaft, wherein an end of each centralizing arm is coupled to a cleaning tool, wherein the first mechanical module is connected to a third seal of the plurality of seals and wherein the second mechanical module is connected to a fourth seal of the plurality of seals;
a first and second flexible coupling pipeline, wherein the first flexible coupling pipeline is connected to the second seal and the third seal, and wherein the second flexible coupling pipeline is connected to the first mechanical module and the fourth seal.