公开(公告)号：WO2021262011A1

公开(公告)日：2021-12-30

申请号：PCT/NO2021/050156

申请日：2021-06-25

Applicant: ARCHER OILTOOLS AS

Inventor： TORVESTAD, Bjørn Tore ,  BERGESEN, Thomas

IPC: E21B29/00 ,  E21B31/16 ,  E21B31/20 ,  E21B23/01 ,  E21B29/005

Abstract: A method for cutting off a tubular in a subterranean well and removing a cut-off section of said tubular from the subterranean well, wherein the method comprises: - providing a downhole tool assembly (10) on a work string (20) wherein a through-bore (19) extends through said work string (20) and said tool assembly (10), the tool assembly (10) comprising, from top to bottom: - a pull tool (14), - an anchor tool (11) for anchoring the pull tool (14) to a first tubular (1), - a space-out drill pipe string (21), - a spear tool (12) for anchoring the pull tool (14) to a second tubular (2), at least partially surrounded by the first tubular (1), - a packer tool (15), - a valve tool (16) for controlling fluid communication in the through-bore (19), wherein a first fluid conduit (161) extends between the valve tool (16) and the packer tool (15), - a cutter tool (13) for cutting said second tubular (2), - running the tool string into the desired portion of the second casing, cutting, pulling and releasing the anchor tool (11) - pulling the entire tool assembly (10) with the cut-off section of the second tubular (2) out of the well.

公开(公告)号：WO2020071920A1

公开(公告)日：2020-04-09

申请号：PCT/NO2019/050202

申请日：2019-10-01

Applicant: ARCHER OILTOOLS AS

Inventor： BERGESEN, Thomas ,  SØRHUS, Atle Johnny

IPC: E21B17/10

Abstract: The invention is a petroleum well wear bushing install and retrieve system comprising - a wear bushing (1), - for being arranged in a wellhead (4), and - being of large bore for a drill pipe string (O, OL, OU) carrying a drill bit or other well tool below to pass through it, and - said wear bushing (1) provided with two or more internal, upward-closingJ-slots (10) with upward bottoms (11), - a running tool (2), - said running tool arranged for being run as part of said drill pipe string (0, 0U, 0L) at least extending above said running tool (2) and having a through-bore tool mandrel (20), - said running tool having radially extending ribs (22) with an outer diameter allowing to pass said J-slots, characterized in that said ribs (22) having radially extending spring-loaded dogs (21) arranged for controlled engagement with said internal J-slots (10), - each said radial dogs (21) having an upward directed key profile (210) for engaging with a corresponding lock profile (110) in said upward bottom (11), - shear pins (3) arranged for initially, for running in said wear bushing (1) to said wellhead (4), said shear pins (3) connecting said radial ribs (21) to said wear bushing (1); so as for allowing running in said wear bushing (1) on said running tool (2) and inserting it in said wellhead (4), and for then putting weight on said drill pipe string (0U) to shear out said shear pins (3) and pass said running tool (2) further downwardly for further operations below said wear bushing (1) or retrieving said running tool (2) upwardly.