CA2169544A1 - Equipment to reduce torque on a drill string - Google Patents

Equipment to reduce torque on a drill string

Info

Publication number
CA2169544A1
CA2169544A1 CA002169544A CA2169544A CA2169544A1 CA 2169544 A1 CA2169544 A1 CA 2169544A1 CA 002169544 A CA002169544 A CA 002169544A CA 2169544 A CA2169544 A CA 2169544A CA 2169544 A1 CA2169544 A1 CA 2169544A1
Authority
CA
Canada
Prior art keywords
drill string
sleeve
mandrel
drill
equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002169544A
Other languages
French (fr)
Other versions
CA2169544C (en
Inventor
George Swietlik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilot Drilling Control Ltd
Original Assignee
George Swietlik
Pilot Drilling Control Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB939317128A external-priority patent/GB9317128D0/en
Application filed by George Swietlik, Pilot Drilling Control Limited filed Critical George Swietlik
Publication of CA2169544A1 publication Critical patent/CA2169544A1/en
Application granted granted Critical
Publication of CA2169544C publication Critical patent/CA2169544C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

A drill string torque-reducing sub-assembly is disclosed comprising: a hollow longitudinally-extending mandrel (1) capable of being coupled between adjacent first and second drill pipes in the drill string; and a sleeve (2) capable of freely rotating about the mandrel (1), the sleeve having an external diameter (18) intended to be larger than that of any connection component of the first or second drill pipe, and the sleeve (2) being prevented by means (16) mounted internally of the sleeve from longitudinal displacement relative to the mandrel (1). The sub-assembly can induce torque in a drill string, by reducing frictional losses between the wellbore and the rotating components in the drill string.
CA002169544A 1993-08-17 1994-08-15 Equipment to reduce torque on a drill string Expired - Lifetime CA2169544C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9317128.8 1993-08-17
GB939317128A GB9317128D0 (en) 1993-08-17 1993-08-17 Equipment to reduce torque on a drill string
PCT/GB1994/001778 WO1995005521A1 (en) 1993-08-17 1994-08-15 Equipment to reduce torque on a drill string

Publications (2)

Publication Number Publication Date
CA2169544A1 true CA2169544A1 (en) 1995-02-23
CA2169544C CA2169544C (en) 2005-11-01

Family

ID=35429190

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002169544A Expired - Lifetime CA2169544C (en) 1993-08-17 1994-08-15 Equipment to reduce torque on a drill string

Country Status (1)

Country Link
CA (1) CA2169544C (en)

Also Published As

Publication number Publication date
CA2169544C (en) 2005-11-01

Similar Documents

Publication Publication Date Title
CA2412153A1 (en) Drilling and lining method using a spoolable tubing
CA2455518A1 (en) Tubing expansion
CA2308180A1 (en) Expandable downhole tubing
CA2131456A1 (en) Downhole tool for controlling the drilling course of a borehole
CA2060008A1 (en) Tubing connector
CA2443007A1 (en) Bore-lining tubing
MY115843A (en) Friction-reducing drill pipe component
CA2316796A1 (en) Downhole apparatus
CA2550981A1 (en) Continuous circulation drilling method
NO971039L (en) Multifunction well tool
CA2351270A1 (en) Drilling method and measurement-while-drilling apparatus and shock tool
AU7002696A (en) A method in piling tubular bases, a combined drilling and piling rig, as well as use of the drill hammer of said rig
CA2356144A1 (en) Method and apparatus for expanding an isolation tubing
BR9509996A (en) Drilling process and drill set to carry out the process
CA2238334A1 (en) Autonomous downhole oilfield tool
CA2167491A1 (en) Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
CA2469361A1 (en) Tubing expansion
CA2141510A1 (en) Tubing String Hanging Apparatus
CA2409872A1 (en) Sealed lateral wellbore junction
CA2217899A1 (en) Dual-member pipe joint for a dual member drill string
CA2391584A1 (en) Method for expanding a tubular element in a wellbore
GB2329208A (en) Indexing percussive drilling bit
AU659731B2 (en) Drill string component
WO2004011776A3 (en) Method of forming a mono diameter wellbore casing
CA2320558A1 (en) Motion compensator for drilling from a floater

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20140815