Granted Patent B2

US 10,563,494 · App. 15/801,422 · Granted Feb 18, 2020

Inventors: Curtis J. Graham (Peoria, IL); Christopher A. Kinney (Iuka, MS)

Assignee: Caterpillar Inc.

E21B43/267B23P6/04F04B7/04F04B47/04F04B53/10B23K10/00F04B37/12

Abstract

Claims (23)

1. A method of remanufacturing a fluid end block, the fluid end block including a plurality of segments adapted to receive working fluid, the method comprising:

removing at least one damaged segment from the plurality of segments of the fluid end block;

providing at least one replacement segment at a location of the at least one damaged segment;

providing a seal between a first surface of the at least one replacement segment and a first surface of at least one adjacent segment of the plurality of segments; and

coupling the at least one replacement segment with the at least one adjacent segment to form a remanufactured fluid end block;

wherein the at least one replacement segment is coupled with the at least one adjacent segment by welding;

wherein the coupling of the at least one replacement segment with the at least one adjacent segment by welding comprises:

machining the first surface of the at least one replacement segment to provide a first chamfered edge at the first surface;

machining the first surface of the at least one adjacent segment to provide a second chamfered edge at the first surface; and

providing a weld bead in a channel formed by the first and second chamfered edges.

2. The method of claim 1 further comprising machining the first surface of the at least one adjacent segment before the coupling of the at least one replacement segment with the at least one adjacent segment.

3. The method of claim 1 , wherein the at least one replacement segment includes a circular groove formed on the first surface of the at least one replacement segment, wherein the circular groove is adapted to receive the seal.

4. The method of claim 1 , wherein the seal is a metal seal.

5. A method of remanufacturing a fluid end block, the fluid end block including a plurality of segments adapted to receive working fluid, the method comprising:

removing at least one damaged segment from the plurality of segments of the fluid end block;

providing at least one replacement segment at a location of the at least one damaged segment;

providing a seal between a first surface of the at least one replacement segment and a first surface of at least one adjacent segment of the plurality of segments; and

coupling the at least one replacement segment with the at least one adjacent segment to form a remanufactured fluid end block;

wherein the at least one replacement segment is coupled with the at least one adjacent segment by stich pins;

wherein the coupling of the at least one replacement segment with the at least one adjacent segment by the stitch pins comprises:

providing a plurality of apertures at a contact portion of the at least one replacement segment and the at least one adjacent segment for receiving the stitch pins;

installing the stitch pins in the plurality of apertures; and

machining an excess material of the stitch pins projecting outwards from an outer surface of the remanufactured fluid end block.

Assignments (1)

Continuity (1)

Cited By (19)

US 1,061,623 US 1,113,987 US 12,270,394 US 12,292,120 US 12,292,121 US 12,297,922 US 12,345,253 US 12,345,332 US 12,366,244 US 12,366,245 US 12,404,931 US 12,416,304 US 12,480,489 US 12,498,051 US 12,510,164 US 12,540,673 US 12,650,171 US 12,669,191 US 12,692,945