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2025
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Invention
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Swivel apparatus. A swivel apparatus (10) for use in a wellbore comprises a housing (12) and a ma... |
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2023
|
Invention
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Percussive drilling apparatus. A wellbore percussive drilling apparatus comprises a support and a... |
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2022
|
Invention
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Swivel apparatus. A swivel apparatus for use in a wellbore comprises a housing and a mandrel exte... |
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Invention
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Downhole torque reducer.
A downhole torque reducer comprises a mandrel defining a circumferentia... |
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Invention
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Downhole torque reducer. A downhole torque reducer comprises a mandrel defining a circumferential... |
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2021
|
Invention
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Downhole drag reduction apparatus.
A downhole drag reducing apparatus 18 comprises a mandrel 20 ... |
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Invention
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Reciprocating drive apparatus.
A reciprocating drive apparatus (10) comprises a housing (12) and... |
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Invention
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Downhole drag reduction apparatus. A downhole drag reducing apparatus (18) comprises a mandrel (2... |
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Invention
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Reciprocating drive apparatus. A reciprocating drive apparatus (10) comprises a housing (12) and ... |
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Invention
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Apparatus for cyclically releasing axial load. An apparatus for cyclically releasing axial load c... |
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Invention
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Swivel.
A swivel (100) is described comprising a first swivel member (112) comprising a first lo... |
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Invention
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Thrust bearing. b). |
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Invention
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Thrust bearing. A thrust bearing is described comprising first and second bearing assemblies (15,... |
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Invention
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Swivel. A swivel (100) is described comprising a first swivel member (112) comprising a first loa... |
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2020
|
Invention
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Thrust bearing. A thrust bearing comprises a mandrel and a bearing assembly mounted axially along... |
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2019
|
Invention
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Downhole retrieval method and apparatus. A method for use in retrieving casing from a wellbore co... |
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Invention
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Jarring apparatus. A jarring apparatus includes first and second jarring assemblies rotatable rel... |
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Invention
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Jarring apparatus. A jarring apparatus includes first and second jarring assemblies which are axi... |
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2018
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Invention
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Jarring apparatus. A downhole jarring apparatus for use in jarring an object in a bore comprises ... |
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2017
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P/S
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Machines, namely, drilling machines, machines for use in well abandonment, pile driving, jarring ... |
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P/S
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Machines and drilling machines, namely, drilling jars and parts thereof, for use in the explorati... |
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P/S
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Machines, machine tools and drilling equipment, drilling
machines and oil and gas well drilling ... |
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2014
|
Invention
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Jarring apparatus. A downhole jarring apparatus for use in jarring an object in a bore includes a... |
