Vacuum pump housing and set of cooling elements for a vaccum pump housing

Abstract

A vacuum pump housing comprises a pump housing formed in a pumping chamber. In the pumping chamber, pumping elements are arranged. On a planar outer side of the pump housing, a cooling element is arranged. The cooling element comprises at least one cooling channel which is open towards the outer side of the pump housing. The disclosure further relates to a set of cooling elements comprising a plurality of cooling elements having different outer dimensions.

1 . A core lifter for use in a drilling system, the core lifter comprising:
 a tubular body including an exterior surface and an interior surface; and   a plurality of longitudinally-oriented recesses formed in the exterior surface of the tubular body of the core lifter.   
     
     
         2 . The core lifter as in  claim 1 , wherein the core lifter has a corrugated configuration. 
     
     
         3 . The core lifter as in  claim 2 , further comprising a plurality of longitudinally-oriented recesses formed in the interior surface of the tubular body of the core lifter;
 wherein the corrugated configuration of the core lifter is formed by the plurality of longitudinally-oriented recesses formed in the interior surface of the tubular body and plurality of longitudinally-oriented recesses formed in the interior surface of the tubular body.   
     
     
         4 . The core lifter as in  claim 1 , wherein the tubular body of the core lifter is tapered. 
     
     
         5 . The core lifter as in  claim 1 , wherein the plurality of longitudinally-oriented recesses formed in the exterior surface of the tubular body of the core lifter are tapered. 
     
     
         6 . The core lifter as in  claim 1 , further comprising a plurality of longitudinally-oriented projections formed in the exterior surface of the tubular body of the core lifter. 
     
     
         7 . The core lifter as in  claim 6 , wherein the plurality of longitudinally-oriented recesses and projections formed in the exterior surface of the tubular body of the core lifter alternate. 
     
     
         8 . The core lifter as in  claim 1 , wherein the core lifter has a length; and wherein the plurality of longitudinally-oriented recesses formed in the exterior surface of the tubular body of the core lifter extend along at least 50 percent, 60 percent, 70 percent, 80 percent and/or 90 percent of the length of the core lifter. 
     
     
         9 . The core lifter as in  claim 1 , wherein at least one of a leading edge or a trailing edge of the core lifter is at an oblique angle relative to a central axis of the core lifter. 
     
     
         10 . The core lifter as in  claim 1 , wherein at least one of a leading edge or a trailing edge of the core lifter is perpendicular to a central axis of the core lifter. 
     
     
         11 . A core lifter for use in a drilling system, the core lifter comprising:
 a tubular body including an exterior surface and an interior surface, the interior surface including a gripping surface configured to grip a core sample; and   a raised contact feature that extends inwardly away from the gripping surface.   
     
     
         12 . The core lifter as in  claim 9 , wherein the raised contact feature extends radially inwardly from the gripping surface. 
     
     
         13 . The core lifter as in  claim 9 , wherein the gripping surface has an inner diameter; and wherein the raised contact feature has an inner diameter that is smaller than the inner diameter of the gripping surface. 
     
     
         14 . The core lifter as in  claim 9 , wherein the raised contact feature has a generally rounded shape. 
     
     
         15 . The core lifter as in  claim 9 , further comprising a flared skirt that extends outwardly from the raised contact feature, the flared skirt configured to limit movement of the core lifter relative to a core lifter case. 
     
     
         16 . The core lifter as in  claim 15 , wherein the flared skirt extends radially outwardly from the raised contact feature. 
     
     
         17 . The core lifter as in  claim 15 , wherein the flared skirt is adjacent the raised contact feature. 
     
     
         18 . The core lifter as in  claim 9 , wherein at least one of a leading edge or a trailing edge of the core lifter is at an oblique angle relative to a central axis of the core lifter. 
     
     
         19 . The core lifter as in  claim 9 , wherein at least one of a leading edge or a trailing edge of the core lifter is perpendicular to a central axis of the core lifter. 
     
     
         20 . A core lifter for use in a drilling system, the core lifter comprising:
 a tubular body; and   a flared skirt configured to limit movement of the core lifter relative to a core lifter case.   
     
     
         21 . The core lifter as in  claim 20 , wherein the flared skirt is configured to limit movement of the core lifter relative to a core lifter case by being disposed within and engaging a recess of the core lifter case. 
     
     
         22 . The core lifter as in  claim 20 , wherein the flared skirt includes slots configured to facilitate resilient compression of the flared skirt. 
     
     
         23 . The core lifter as in  claim 22 , wherein the slots are configured to facilitate resilient compression of the flared skirt when a portion of a core sample is disposed within the core lifter and a tapered inner wall of the core lifter case contacts and/or exerts a force against the core lifter. 
     
     
         24 . The core lifter as in  claim 20 , wherein the flared skirt forms a leading edge of the core lifter. 
     
     
         25 . The core lifter as in  claim 20 , wherein the flared skirt forms a trailing edge of the core lifter. 
     
     
         26 . The core lifter as in  claim 20 , further comprising:
 a gripping surface of the tubular body of the core lifter, the gripping surface being configured to grip a core sample; and   a raised contact feature that extends inwardly away from the gripping surface.   
     
     
         27 . The core lifter as in  claim 26 , wherein the raised contact feature extends radially inwardly from the gripping surface. 
     
     
         28 . The core lifter as in  claim 26 , wherein the gripping surface has an inner diameter; and wherein the raised contact feature has an inner diameter that is smaller than the inner diameter of the gripping surface. 
     
     
         29 . The core lifter as in  claim 26 , wherein the raised contact feature has a generally rounded shape. 
     
     
         30 . The core lifter as in  claim 26 , wherein the flared skirt includes slots configured to facilitate resilient compression of the flared skirt and the raised contact feature. 
     
     
         31 . The core lifter as in  claim 30 , wherein the slots are configured to facilitate resilient compression of the flared skirt and the raised contact feature when a portion of the core sample is disposed within the core lifter and a tapered inner wall of the core lifter case contacts and/or exerts a force against the core lifter. 
     
     
         32 . The core lifter as in  claim 20 , wherein at least one of a leading edge or a trailing edge of the core lifter is at an oblique angle relative to a central axis of the core lifter. 
     
     
         33 . The core lifter as in  claim 20 , wherein at least one of a leading edge or a trailing edge of the core lifter is perpendicular to a central axis of the core lifter. 
     
     
         34 . A method of forming a core lifter for use in a drilling system, the method comprising:
 forming a tubular body of the core lifter by stamping a sheet of material.   
     
     
         35 . The method as in  claim 34 , wherein the sheet of material comprises a metallic sheet. 
     
     
         36 . The method as in  claim 34 , further comprising:
 forming a plurality of longitudinally-oriented recesses in an exterior surface of the tubular body of the core lifter by stamping the sheet of material.   
     
     
         37 . The method as in  claim 34 , further comprising:
 forming a plurality of longitudinally-oriented recesses in an exterior surface of the tubular body of the core lifter by stamping the sheet of material; and   forming a plurality of longitudinally-oriented recesses in an interior surface of the tubular body of the core lifter by stamping the sheet of material.   
     
     
         38 . The method as in  claim 34 , wherein forming a tubular body of the core lifter includes:
 forming a corrugated configuration of the tubular body of the core lifter by stamping the sheet of material.   
     
     
         39 . The method as in  claim 34 , further comprising:
 forming a gripping surface on an exterior surface of the tubular body of the core lifter by stamping the sheet of material, the gripping surface being configured to grip a core sample; and   forming a raised contact feature of the core lifter by stamping the sheet of material, the raised contact feature extending inwardly away from the gripping surface.   
     
     
         40 . The method as in  claim 39 , further comprising:
 forming a flared skirt of the core lifter by stamping the sheet of material, the flared skirt extending outwardly from the raised contact feature, the flared skirt configured to limit movement of the core lifter relative to a core lifter case.   
     
     
         41 . The method as in  claim 40 , wherein the flared skirt extends radially outwardly from the raised contact feature. 
     
     
         42 . The method as in  claim 40 , wherein the flared skirt is adjacent the raised contact feature. 
     
     
         43 . The method as in  claim 40 , further comprising:
 forming slots in the flared skirt of the core lifter by stamping the sheet of material, the slots configured to facilitate resilient compression of the flared skirt and the raised contact feature.   
     
     
         44 . The method as in  claim 43 , wherein the slots are configured to facilitate resilient compression of the flared skirt and the raised contact feature when a portion of the core sample is disposed within the core lifter and a tapered inner wall of the core lifter case contacts and/or exerts a force against the core lifter. 
     
     
         45 . The method as in  claim 34 , further comprising:
 forming a flared skirt of the core lifter by stamping the sheet of material, the flared skirt configured to limit movement of the core lifter relative to a core lifter case.   
     
     
         46 . The method as in  claim 45 , further comprising:
 forming slots in the flared skirt of the core lifter by stamping the sheet of material, the slots configured to facilitate resilient compression of the flared skirt.   
     
     
         47 . The method as in  claim 46 , wherein the slots are configured to facilitate resilient compression of the flared skirt when a portion of a core sample is disposed within the core lifter and a tapered inner wall of the core lifter case contacts and/or exerts a force against the core lifter. 
     
     
         48 . The method as in  claim 34 , wherein at least one of a leading edge or a trailing edge of the core lifter is at an oblique angle relative to a central axis of the core lifter. 
     
     
         49 . The method as in  claim 34 , wherein at least one of a leading edge or a trailing edge of the core lifter is perpendicular to a central axis of the core lifter. 
     
     
         50 . The method as in  claim 34 , further comprising:
 applying a wear-resistant coating to at least a portion of the core lifter.   
     
     
         51 . The method as in  claim 50 , wherein the wear-resistant coating comprises a metal and micro-diamond composite coating. 
     
     
         52 . The method as in  claim 51 , wherein the wear-resistant coating is bonded to the core lifter via an immersive electro-chemical process.