摘要:
Cast material rotor (200,300,500,800) with profiled helical outer surface (208,308,508,808). Cast material layer (502,802) can be disposed between core (504,804) and tube (506,806). Profiled helical outer surface (208,308) can be in tube 206 or cast material layer 302, respectively. Method of forming rotor 200 can include filling void between outer surface 212 of core 204 and longitudinal bore 210 of tube 206 having profiled helical outer surface 208 with cast material 202 in fluid state, and solidifying cast material 202. Tube 206 can be disposed within profiled helical bore 714 of mold 700, e.g., before solidifying cast material 202. Method of forming rotor 300 can include filling void between outer surface 312 of core 304 and profiled helical bore 714 in mold 700 with cast material 302 in fluid state, solidifying cast material 302 to impart profiled helical outer surface 308 thereto, and removing mold 700 from cast material 302.
摘要:
Cast material rotor (200,300,500,800) with profiled helical outer surface (208,308,508,808). Cast material layer (502,802) can be disposed between core (504,804) and tube (506,806). Profiled helical outer surface (208,308) can be in tube 206 or cast material layer 302, respectively. Method of forming rotor 200 can include filling void between outer surface 212 of core 204 and longitudinal bore 210 of tube 206 having profiled helical outer surface 208 with cast material 202 in fluid state, and solidifying cast material 202. Tube 206 can be disposed within profiled helical bore 714 of mold 700, e.g., before solidifying cast material 202. Method of forming rotor 300 can include filling void between outer surface 312 of core 304 and profiled helical bore 714 in mold 700 with cast material 302 in fluid state, solidifying cast material 302 to impart profiled helical outer surface 308 thereto, and removing mold 700 from cast material 302.
摘要:
The present invention recites a method of fabricating a stator for a downhole motor, the method comprising the steps of providing a stator tube having an interior surface and applying a bonding agent to the interior surface of the stator tube. Additionally, a mandrel is positioned within the stator tube, the mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator. Furthermore, a reinforcing material is introduced into the stator tube to fill space between the mandrel and the interior surface of the stator tube and subsequently solidified to bond the reinforcing material to the interior surface of the stator tube, The mandrel is then removed from the bonded stator tube and reinforcing material such that a stator is fabricated.
摘要:
A Moineau device includes a stator that interfaces to a rotor whereby fluid flows through cavities between the stator and rotor that progress axially as the rotor is rotated relative to the stator. At least one of the stator and the rotor is realized from a nanocomposite that includes a polymeric matrix with carbon nanotubes dispersed therein.
摘要:
The present application discloses a progressive cavity motor or pump component, either stator or rotor, which provides a high glass transition temperature polymeric surface on the component which becomes resilient at or below the expected operating temperature of the motor or pump, but which remains solid at ambient temperatures, along with a method of fabricating either a stator or a rotor with such surface characteristics. Since the surface becomes resilient, the progressive cavity pump operates efficiently at temperatures above the glass transition temperature of the selected polymeric surface.
摘要:
The present invention recites a method of fabricating a stator for a downhole motor, the method comprising the steps of providing a stator tube having an interior surface and applying a bonding agent to the interior surface of the stator tube. Additionally, a mandrel is positioned within the stator tube, the mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator. Furthermore, a reinforcing material is introduced into the stator tube to fill space between the mandrel and the interior surface of the stator tube and subsequently solidified to bond the reinforcing material to the interior surface of the stator tube, The mandrel is then removed from the bonded stator tube and reinforcing material such that a stator is fabricated.
摘要:
The present application discloses a progressive cavity motor or pump component, either stator or rotor, which provides a high glass transition temperature polymeric surface on the component which becomes resilient at or below the expected operating temperature of the motor or pump, but which remains solid at ambient temperatures, along with a method of fabricating either a stator or a rotor with such surface characteristics. Since the surface becomes resilient, the progressive cavity pump operates efficiently at temperatures above the glass transition temperature of the selected polymeric surface.
摘要:
A skinned rotor 201 or skinned stator 305 of a progressive cavity apparatus is described. A rotor 201 can be skinned by threading a sleeve 210 with a profiled helical outer 212 and profiled helical inner 214 surface onto a core 202 with a profiled helical outer surface 204. A rotor (1301, 1401) can also be skinned by inserting a non-helical core (1302, 1402) into a non-helical longitudinal bore (1314, 1414) of a sleeve (1310, 1410) with a profiled helical outer surface (1312, 1412). A stator 305 can be skinned by threading a tubular liner 310 with profiled helical inner 314 and profiled helical outer 312 surfaces into a profiled helical bore 308 of a tube 306. A stator (2405, 2505) can also be skinned by inserting a tubular liner (2410, 2510) with a non-helical outer surface (2412, 2512) into a non-helical bore (2408, 2508) of a tube (2406, 2506).
摘要:
A skinned rotor 201 or skinned stator 305 of a progressive cavity apparatus is described. A rotor 201 can be skinned by threading a sleeve 210 with a profiled helical outer 212 and profiled helical inner 214 surface onto a core 202 with a profiled helical outer surface 204. A rotor (1301, 1401) can also be skinned by inserting a non-helical core (1302, 1402) into a non-helical longitudinal bore (1314, 1414) of a sleeve (1310, 1410) with a profiled helical outer surface (1312, 1412). A stator 305 can be skinned by threading a tubular liner 310 with profiled helical inner 314 and profiled helical outer 312 surfaces into a profiled helical bore 308 of a tube 306. A stator (2405, 2505) can also be skinned by inserting a tubular liner (2410, 2510) with a non-helical outer surface (2412, 2512) into a non-helical bore (2408, 2508) of a tube (2406, 2506).
摘要:
The rotor of a downhole motor includes a mandrel having at least one radial lobe, and an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement therebetween. The sleeve is compressed about the mandrel through one of various processes, including heat shrinking, vacuum shrinking, and stretching.