Split stream oilfield pumping system utilizing recycled, high reid vapor pressure fluid
A split stream oilfield pumping system is provided which utilizes recycled high Reid vapor pressure production fluids. The oilfield system is made up of two separate fluid streams: a first recycled fluid stream and a second new fluid stream. The recycled fluid stream is enclosed to reduce or eliminate vaporization of the recycled fluid, which typically will have a Reid vapor pressure >14 kPa. Wellbore treatment additives are added to the new fluid stream, and the resultant treatment fluid is mixed with the recycled fluid in a common manifold to provide a final wellbore treatment fluid to be delivered to the wellhead.
1. An oilfield pumping system, comprising:
a recycled fluid subsystem enclosed from the atmosphere, the recycled fluid subsystem comprising a recycled fluid source, a recycled fluid supply pump and a high pressure pumping means;
a non-recycled fluid subsystem, the non-recycled fluid subsystem comprising a non-recycled fluid source, a non-recycled fluid supply pump, a proppant blending subsystem, and a non-recycled fluid high pressure pump;
a common mixing manifold; and,
a wellhead connection;
wherein the recycled fluid subsystem provides a recycled fluid to the common mixing manifold, the non-recycled fluid subsystem provides a non-recycled fluid to the common mixing manifold, and wherein a mixed fluid is delivered from the common mixing manifold to the wellhead connection;
wherein the recycled fluid in the recycled fluid subsystem has a Reid vapor pressure of 14 kPa or greater.
2. The oilfield pumping system of claim 1 , wherein the blending subsystem comprises a proppant delivery system, a blender mixing chamber and a discharge pump.
3. The oilfield pumping system of claim 2 , wherein the discharge pump is a progressive cavity pump, a centrifugal pump, or a positive displacement pump.
4. The oilfield pumping system of claim 2 , wherein the blending system is further comprised of a bypass between the non-recycled fluid system and the discharge pump.
5. The oilfield pumping system of claim 4 , wherein the blending subsystem further comprises a means for measuring fluid density, the means being located downstream from the blender mixing chamber.
6. The oilfield pumping system of claim 5 , wherein the oilfield pumping system is incorporated into tractor-trailer combination or truck mount.
7. The oilfield pumping system of claim 1 , wherein the common mixing manifold is proximate to or integral with the wellhead connection.
8. The oilfield pumping system of claim 1 , wherein the recycled fluid source is a wellhead.
9. The oilfield pumping system of claim 1 , wherein the recycled fluid source is a storage tank.
10. The oilfield pumping system of claim 1 , wherein the non-recycled fluid source is a storage tank.
11. The oilfield pumping system of claim 1 , wherein the recycled fluid supply pump is a progressive cavity pump, a centrifugal pump, or a positive displacement pump.
12. The oilfield pumping system of claim 1 , wherein the non-recycled fluid supply pump is a progressive cavity pump, a centrifugal pump, or a positive displacement pump.
13. The oilfield pumping system of claim 1 , wherein the proppant blending subsystem further comprises a chemical additive injector.
14. A method for treating a wellbore with an oilfield pumping system, the system comprising a non-recycled fluid subsystem, a recycled fluid subsystem enclosed from the atmosphere, a common mixing manifold, and a wellhead connection, wherein:
the non-recycled fluid subsystem provides a non-recycled fluid;
the recycled fluid subsystem provides a recycled fluid, wherein the recycled fluid in the recycled fluid subsystem has a Reid vapor pressure of greater than 14 kPa;
the non-recycled fluid is mixed with the recycled fluid in the common mixing manifold to provide a mixed fluid; and the mixed fluid is delivered to the wellhead connection, wherein the wellhead connection is in fluid communication with the wellbore.
15. The method of claim 14 , wherein the common mixing manifold is integral with the wellhead connection.
16. The method of claim 14 , wherein the non-recycled fluid comprises a hydrocarbon, an acid, carbon dioxide, nitrogen or water or mixtures thereof.
17. The method of claim 16 , wherein the non-recycled fluid subsystem further comprises a blending subsystem, the blending subsystem comprising means for introducing wellbore treatment additives into the non-recycled fluid subsystem.
18. The method of claim 17 , wherein the wellbore treatment additives are propping agents.
19. The method of claim 17 , wherein the wellbore treatment additives are wellbore treatment chemicals.