US20220213890A1 - Fracturing pump assembly - Google Patents
Fracturing pump assembly Download PDFInfo
- Publication number
- US20220213890A1 US20220213890A1 US17/144,039 US202117144039A US2022213890A1 US 20220213890 A1 US20220213890 A1 US 20220213890A1 US 202117144039 A US202117144039 A US 202117144039A US 2022213890 A1 US2022213890 A1 US 2022213890A1
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- United States
- Prior art keywords
- pump
- fracturing
- crankshaft
- assembly
- plunger
- 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.)
- Abandoned
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- 244000309464 bull Species 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 22
- 238000005461 lubrication Methods 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000008646 thermal stress Effects 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 16
- 239000003921 oil Substances 0.000 description 9
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/18—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the effective cross-section of the working surface of the piston
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/2607—Surface equipment specially adapted for fracturing operations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/128—Driving means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/16—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having two or more sets of cylinders or pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
Definitions
- This invention relates to pumps, and in particular, to an improved fracturing pump assembly.
- Drilling and production systems are often employed to access and extract hydrocarbons from subterranean formations. These systems may be located onshore or offshore depending on the location of a desired resource. Further, such systems generally include a wellhead assembly mounted on a well through which the resource is accessed or extracted. These wellhead assemblies may include a wide variety of components, such as various casings, valves, pumps, fluid conduits, and the like, that control drilling or extraction operations.
- Drilling and production operations employ fluids referred to as fracturing or drilling fluids to provide lubrication and cooling of the drill bit, clear away cuttings, and maintain desired hydrostatic pressure during operations.
- Fracturing can include all types of water-based, oil-based, or synthetic-based drilling fluids.
- Fracturing pumps can be used to move large quantities of fracturing from surface tanks, down thousands of feet of drill pipe, out of nozzles in the bit, back up the annulus, and back to the tanks. Operations come to a halt if the fracturing pumps fail, and thus, reliability under harsh conditions, using all types of abrasive fluids, is of utmost commercial interest. Also, portability of these pumps is an issue, so having a versatile pump which can meet the needs of virtually any situation would be desirable.
- An improved fracturing pump is provided.
- the pump is reconfigurable on site.
- the pump uses a bull gear/pinion drive arrangement that increases reliability and efficiency. Internal components of the pump may be varied to meet the requirements of a specific operation.
- the reconfiguration gives the user the ability to increase or decrease the horsepower of the pump.
- a closed loop oil feed system provides constant and reliable lubrication even under heavy loads.
- the sealing system is enhanced to reduce leaks and thermal stresses.
- the pump also has an improved frame and chassis to reduce NVH and enhance reliability.
- FIG. 1 generally depicts a wellsite system, in accordance with one or more implementations described herein.
- FIG. 2 shows a side cutaway view of a prior art pump.
- FIG. 3 shows a perspective view of the fracturing pump assembly of the invention.
- FIG. 4 shows a perspective view of a second embodiment of the fracturing pump assembly of the invention.
- FIG. 5 is a diagram of the closed loop oil feed system of the invention.
- FIG. 6 is a system flowchart depicting operational aspects of the assembly of the invention.
- FIG. 1 illustrates a wellsite system in which the inventive fracturing pump can be employed.
- the wellsite system of FIG. 1 may be onshore or offshore.
- a borehole 11 may be formed in subsurface formations by rotary drilling using any suitable technique.
- a drill string 12 may be suspended within the borehole 11 and may have a bottom hole assembly 100 that includes a drill bit 105 at its lower end.
- a surface system of the wellsite system of FIG. 1 may include a platform and derrick assembly 10 positioned over the borehole 11 , the platform and derrick assembly 10 including a rotary table 16 , kelly 17 , hook 18 and rotary swivel 19 .
- the drill string 12 may be rotated by the rotary table 16 , energized by any suitable means, which engages the kelly 17 at the upper end of the drill string 12 .
- the drill string 12 may be suspended from the hook 18 , attached to a traveling block (not shown), through the kelly 17 and the rotary swivel 19 , which permits rotation of the drill string 12 relative to the hook 18 .
- a top drive system could alternatively be used, which may be a top drive system well known to those of ordinary skill in the art.
- the surface system may also include drilling fluid 26 (also referred to as fracturing) stored in a pit/tank 27 at the wellsite.
- a pump 29 supported on a skid 28 may deliver the drilling fluid 26 to the interior of the drill string 12 via a port in the swivel 19 , causing the drilling fluid to flow downwardly through the drill string 12 as indicated by the directional arrow 8 .
- the drilling fluid 26 may exit the drill string 12 via ports in a drill bit 105 , and circulate upwardly through the annulus region between the outside of the drill string 12 and the wall of the borehole 11 , as indicated by the directional arrows 9 .
- a bottom hole assembly 100 of the wellsite system of FIG. 1 may include logging-while-drilling (LWD) modules 120 and 120 A and/or measuring-while-drilling (MWD) modules 130 and 130 A, a roto-steerable system and motor 150 , and the drill bit 105 .
- LWD logging-while-drilling
- MWD measuring-while-drilling
- FIG. 2 shows a cutaway side view of a prior art fracturing pump, illustrating various components of the power assembly, the portion of the pump that converts rotational energy into reciprocating motion.
- a pump as shown in FIG. 2 could be used as pump 29 of FIG. 1 , although many other fracturing pumps, including those with designs described below in accordance with certain embodiments of the present technique, could instead be used as pump 29 .
- Pinion gears 52 along a pinion shaft 48 drive a larger gear referred to as a bull gear 42 (e.g., a helical gear or a herringbone gear), which rotates on a crankshaft 40 .
- Pinion shaft 48 is turned by a motor (not shown).
- the crankshaft 40 turns to cause rotational motion of hubs 44 disposed on the crankshaft 40 , each hub 44 being connected to or integrated with a connecting rod 46 .
- the connecting rods 46 couple to a crosshead 54 (a crosshead block and crosshead extension as shown may be referred to collectively as the crosshead 54 herein).
- the crosshead 54 moves translationally constrained by guide 57 .
- Pony rods 60 connect the crosshead 54 to a piston 58 . In the fluid end of the pump, each piston 58 reciprocates to move fracturing in and out of valves in the fluid end of the pump 29 .
- pump 100 is a triplex pump and pump 200 is a quintuplex pump.
- the two pumps 100 , 200 function in the same manner except as otherwise noted.
- the pump 100 has a crankshaft 102 , which drives connecting rods 104 , which ultimately cause reciprocating action of the pistons 106 to create pumping action as in the prior art model.
- the conventional style crankshaft 102 is mounted on the power end frame with strong bearing housing to support the self aligned, double—row roller bearings on every frame plate to deliver maximum life.
- the crankshaft 102 is connected to connecting rods vis a bull gear pinion drive arrangement.
- the bull gears & pinion gear are machined to AGMA 10 specification from forged high alloy steel and heat treated for Dura-last service life.
- the gears featuring a helical gear profile are mounted securely to the crankshaft with high strength bolts.
- a closed loop oil feed system 118 is part of an optimized lubrication system which reduces friction between crosshead 116 and crosshead guides 117 . Low operating lube oil temperatures and high mechanical efficiency increase reliability.
- a robust sealing system is provided to improve leak and thermal stresses handling during harsh high temperature Frac operation in the field.
- the interior components of the pump including the plunger 140 , can be interchangeably replaced to increase power output, a key aspect of the invention.
- Stroke length can be varied between 8 and 11 inches, with corresponding variances in output power.
- power generation ranges from 1800HP to 2250HP.
- the pump allows variable high pressure output and high flow rate based on variance of plunger size.
- Crosshead 116 is designed to improve friction issues and reduce wear and noise and integrate with two piece crosshead head as alternative design.
- a closed loop fluid system to increase stroke component life and improve lubrication is described below
- the bull gears and pinion shaft are forged and heat treated, made from alloy steel, with the helix gear machined to AGMA grade 10 .
- the teeth surface of the pinion shaft are surface hardened to BHN 360 .
- the bearings are preferably premium SKF or equivalent with a minimum life of 30,000 hours at rated load.
- Crosshead 116 is made of cast iron and may include an optimized electric lube system. High temperature rubber seals are used throughout to improve sealing and reliability. Adding fluid channels as described and shown in FIG. 5 below allows for better lubrication of components, as well as better lubricant distribution, and reduces thermal stress. Finally, a new sealing design using fluid mechanics applications to eliminate leak and increase sealing life.
- the variation of pump 200 includes a crankshaft 202 and function to operate plungers 204 which effect pumping action.
- the size of plungers 204 can be varied to allow for variable pumping output as in the prior embodiment 100 .
- Power end frame plates 206 are designed and built from high strength grade steel alloy yet optimized for light weight.
- the pump frame and skid are integrated to provide rigidity and reduce deflection of stroke components and increase life cycle and durability.
- FIGS. 5 and 6 show the closed loop lubrication system 140 .
- the purpose of the closed loop oil lubrication system is to provide cooling to the stroke components, increase the life of the stroke components such as the crosshead, connector rod bearing and crankshaft bearing.
- Efficient lubrication and reduced contamination will increase durability and life of the stroke components. More efficient lubrication circulation and effective contamination reduction will immediately reduce overheating and reduce failure.
- the flow diagram shown in FIG. 5 circulates oil or lubricant to stroke components and the crankshaft bearing of the pumps 100 , 200 .
- the oil loop lines circulate from the oil tank with action of the feed pump 198 .
- Flow regulation is accomplished with check valves 9 , relief valve 7 , and filters 5 , and 6 to eliminate contamination.
- a solenoid (not shown) is to improve and regulate steady pressure to the stroke components as shown in the diagram.
- Oil re-circulated from the pump 100 , 200 is cooled by a heat exchanger 201 before being re-circulated via tank or reservoir 4 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
An improved fracturing pump is provided. The pump is reconfigurable on site. The pump uses a bull gear/pinion drive arrangement that increases reliability and efficiency. Internal components of the pump may be varied to meet the requirements of a specific operation. The reconfiguration gives the user the ability to increase or decrease the horsepower of the pump. A closed loop oil feed system provides constant and reliable lubrication even under heavy loads. The sealing system is enhanced to reduce leaks and thermal stresses. The pump also has an improved frame and chassis to reduce NVH and enhance reliability.
Description
- This invention relates to pumps, and in particular, to an improved fracturing pump assembly.
- Drilling and production systems are often employed to access and extract hydrocarbons from subterranean formations. These systems may be located onshore or offshore depending on the location of a desired resource. Further, such systems generally include a wellhead assembly mounted on a well through which the resource is accessed or extracted. These wellhead assemblies may include a wide variety of components, such as various casings, valves, pumps, fluid conduits, and the like, that control drilling or extraction operations.
- Drilling and production operations, such as fracking, employ fluids referred to as fracturing or drilling fluids to provide lubrication and cooling of the drill bit, clear away cuttings, and maintain desired hydrostatic pressure during operations. Fracturing can include all types of water-based, oil-based, or synthetic-based drilling fluids. Fracturing pumps can be used to move large quantities of fracturing from surface tanks, down thousands of feet of drill pipe, out of nozzles in the bit, back up the annulus, and back to the tanks. Operations come to a halt if the fracturing pumps fail, and thus, reliability under harsh conditions, using all types of abrasive fluids, is of utmost commercial interest. Also, portability of these pumps is an issue, so having a versatile pump which can meet the needs of virtually any situation would be desirable.
- An improved fracturing pump is provided. The pump is reconfigurable on site. The pump uses a bull gear/pinion drive arrangement that increases reliability and efficiency. Internal components of the pump may be varied to meet the requirements of a specific operation. The reconfiguration gives the user the ability to increase or decrease the horsepower of the pump. A closed loop oil feed system provides constant and reliable lubrication even under heavy loads. The sealing system is enhanced to reduce leaks and thermal stresses. The pump also has an improved frame and chassis to reduce NVH and enhance reliability.
- It is a major object of the invention to provide an improved fracturing pump assembly.
- It is another object of the invention to provide a fracturing pump assembly with interchangeable parts.
- It is another object of the invention to provide a fracturing pump assembly with a variable power output.
- It is another object of the invention to provide a fracturing pump assembly with an improved crosshead design.
- It is another object of the invention to provide a fracturing pump assembly having a fluid end with a 45 degree valve seat.
- It is another object of the invention to provide a fracturing pump assembly having an improved frame which utilizes partition support.
- It is another object of the invention to provide a fracturing pump assembly where the pump frame is integrated into the skid chassis.
- It is another object of the invention to provide a fracturing pump assembly with a closed loop lubricating system.
-
FIG. 1 generally depicts a wellsite system, in accordance with one or more implementations described herein. -
FIG. 2 shows a side cutaway view of a prior art pump. -
FIG. 3 shows a perspective view of the fracturing pump assembly of the invention. -
FIG. 4 shows a perspective view of a second embodiment of the fracturing pump assembly of the invention. -
FIG. 5 is a diagram of the closed loop oil feed system of the invention. -
FIG. 6 is a system flowchart depicting operational aspects of the assembly of the invention. - Generally speaking,
FIG. 1 illustrates a wellsite system in which the inventive fracturing pump can be employed. The wellsite system ofFIG. 1 may be onshore or offshore. In the wellsite system ofFIG. 1 , aborehole 11 may be formed in subsurface formations by rotary drilling using any suitable technique. Adrill string 12 may be suspended within theborehole 11 and may have abottom hole assembly 100 that includes adrill bit 105 at its lower end. A surface system of the wellsite system ofFIG. 1 may include a platform andderrick assembly 10 positioned over theborehole 11, the platform andderrick assembly 10 including a rotary table 16, kelly 17,hook 18 androtary swivel 19. Thedrill string 12 may be rotated by the rotary table 16, energized by any suitable means, which engages the kelly 17 at the upper end of thedrill string 12. Thedrill string 12 may be suspended from thehook 18, attached to a traveling block (not shown), through thekelly 17 and therotary swivel 19, which permits rotation of thedrill string 12 relative to thehook 18. A top drive system could alternatively be used, which may be a top drive system well known to those of ordinary skill in the art. - In the wellsite system of
FIG. 1 , the surface system may also include drilling fluid 26 (also referred to as fracturing) stored in a pit/tank 27 at the wellsite. Apump 29 supported on askid 28 may deliver thedrilling fluid 26 to the interior of thedrill string 12 via a port in theswivel 19, causing the drilling fluid to flow downwardly through thedrill string 12 as indicated by thedirectional arrow 8. Thedrilling fluid 26 may exit thedrill string 12 via ports in adrill bit 105, and circulate upwardly through the annulus region between the outside of thedrill string 12 and the wall of theborehole 11, as indicated by thedirectional arrows 9. In this manner, thedrilling fluid 26 lubricates thedrill bit 105 and carries formation cuttings up to the surface, as thedrilling fluid 26 is returned to the pit/tank 27 for recirculation. Thedrilling fluid 26 also serves to maintain hydrostatic pressure and prevent well collapse. Thedrilling fluid 26 may also be used for telemetry purposes. Abottom hole assembly 100 of the wellsite system ofFIG. 1 may include logging-while-drilling (LWD)modules modules motor 150, and thedrill bit 105. -
FIG. 2 shows a cutaway side view of a prior art fracturing pump, illustrating various components of the power assembly, the portion of the pump that converts rotational energy into reciprocating motion. A pump as shown inFIG. 2 could be used aspump 29 ofFIG. 1 , although many other fracturing pumps, including those with designs described below in accordance with certain embodiments of the present technique, could instead be used aspump 29.Pinion gears 52 along apinion shaft 48 drive a larger gear referred to as a bull gear 42 (e.g., a helical gear or a herringbone gear), which rotates on acrankshaft 40.Pinion shaft 48 is turned by a motor (not shown). Thecrankshaft 40 turns to cause rotational motion ofhubs 44 disposed on thecrankshaft 40, eachhub 44 being connected to or integrated with a connectingrod 46. By way of the connectingrods 46, the rotational motion of the crankshaft 40 (andhub 44 connected thereto) is converted into reciprocating motion. The connectingrods 46 couple to a crosshead 54 (a crosshead block and crosshead extension as shown may be referred to collectively as thecrosshead 54 herein). Thecrosshead 54 moves translationally constrained byguide 57.Pony rods 60 connect thecrosshead 54 to apiston 58. In the fluid end of the pump, eachpiston 58 reciprocates to move fracturing in and out of valves in the fluid end of thepump 29. - Referring now to
FIGS. 3-4 two embodiments of thepump pump 100 is a triplex pump and pump 200 is a quintuplex pump. The twopumps pump 100 has acrankshaft 102, which drives connecting rods 104, which ultimately cause reciprocating action of the pistons 106 to create pumping action as in the prior art model. Theconventional style crankshaft 102 is mounted on the power end frame with strong bearing housing to support the self aligned, double—row roller bearings on every frame plate to deliver maximum life. In a key aspect of the invention, thecrankshaft 102 is connected to connecting rods vis a bull gear pinion drive arrangement. The bull gears & pinion gear are machined toAGMA 10 specification from forged high alloy steel and heat treated for Dura-last service life. The gears featuring a helical gear profile, are mounted securely to the crankshaft with high strength bolts. - By increasing the size of key components such as the
crossheads 116, andcrankshaft 102 thepump 100 can handle greater loads. A closed loop oil feed system 118 is part of an optimized lubrication system which reduces friction betweencrosshead 116 and crosshead guides 117. Low operating lube oil temperatures and high mechanical efficiency increase reliability. - A robust sealing system is provided to improve leak and thermal stresses handling during harsh high temperature Frac operation in the field. As previously stated, the interior components of the pump, including the plunger 140, can be interchangeably replaced to increase power output, a key aspect of the invention. Stroke length can be varied between 8 and 11 inches, with corresponding variances in output power. In a preferred embodiment power generation ranges from 1800HP to 2250HP. Also, the pump allows variable high pressure output and high flow rate based on variance of plunger size.
-
Crosshead 116 is designed to improve friction issues and reduce wear and noise and integrate with two piece crosshead head as alternative design. A closed loop fluid system to increase stroke component life and improve lubrication is described below - The bull gears and pinion shaft are forged and heat treated, made from alloy steel, with the helix gear machined to
AGMA grade 10. The teeth surface of the pinion shaft are surface hardened to BHN 360. The bearings are preferably premium SKF or equivalent with a minimum life of 30,000 hours at rated load.Crosshead 116 is made of cast iron and may include an optimized electric lube system. High temperature rubber seals are used throughout to improve sealing and reliability. Adding fluid channels as described and shown inFIG. 5 below allows for better lubrication of components, as well as better lubricant distribution, and reduces thermal stress. Finally, a new sealing design using fluid mechanics applications to eliminate leak and increase sealing life. - Referring now to
FIG. 4 a quintuplex variation of thepump 200 is shown. The variation ofpump 200 includes acrankshaft 202 and function to operateplungers 204 which effect pumping action. The size ofplungers 204 can be varied to allow for variable pumping output as in theprior embodiment 100. - Power
end frame plates 206 are designed and built from high strength grade steel alloy yet optimized for light weight. - In a key aspect of the invention, the pump frame and skid are integrated to provide rigidity and reduce deflection of stroke components and increase life cycle and durability.
-
FIGS. 5 and 6 show the closed loop lubrication system 140. The purpose of the closed loop oil lubrication system is to provide cooling to the stroke components, increase the life of the stroke components such as the crosshead, connector rod bearing and crankshaft bearing. - Efficient lubrication and reduced contamination will increase durability and life of the stroke components. More efficient lubrication circulation and effective contamination reduction will immediately reduce overheating and reduce failure.
- The flow diagram shown in
FIG. 5 circulates oil or lubricant to stroke components and the crankshaft bearing of thepumps feed pump 198. Flow regulation is accomplished withcheck valves 9, relief valve 7, and filters 5, and 6 to eliminate contamination. A solenoid (not shown) is to improve and regulate steady pressure to the stroke components as shown in the diagram. Oil re-circulated from thepump - It is to be understood that the present invention is not limited to the sole embodiment described above, but encompasses any and all embodiments within the scope of the following claims:
Claims (2)
1. A fracturing pump assembly comprising: a frame having a plurality of bores formed therethrough; and a plurality of crossheads disposed in the plurality of bores, respectively, and adapted to reciprocate therein;
a crankshaft for imparting motive power to a plunger, said plunger situated in the fluid handling end of the pump and connected to a piston, whereby rotation of said crankshaft causes reciprocating movement of said plunger which causes fluid to be expelled from the fluid handling end of the pump, and where said crankshaft is coupled to said piston via a bull gear/pinion drive arrangement.
2. The assembly of claim 1 wherein said plunger may be varied in size for a variable power output.
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US17/144,039 US20220213890A1 (en) | 2021-01-07 | 2021-01-07 | Fracturing pump assembly |
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US17/144,039 US20220213890A1 (en) | 2021-01-07 | 2021-01-07 | Fracturing pump assembly |
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2021
- 2021-01-07 US US17/144,039 patent/US20220213890A1/en not_active Abandoned
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US20120234539A1 (en) * | 2011-03-16 | 2012-09-20 | Halliburton Energy Services, Inc. | Lubrication system for a reciprocating apparatus |
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US20160208794A1 (en) * | 2015-01-19 | 2016-07-21 | Baker Hughes Incorporated | Pump assembly and method for assessing valve conditions in pump |
US20180045331A1 (en) * | 2015-03-09 | 2018-02-15 | Schlumberger Technology Corporation | Automated operation of wellsite equipment |
US20170051732A1 (en) * | 2015-08-18 | 2017-02-23 | Baker Hughes Incorporated | Pump system and method of starting pump |
US20170082101A1 (en) * | 2015-09-17 | 2017-03-23 | Schlumberger Technology Corporation | Apparatus and Methods for Identifying Defective Pumps |
US20170292513A1 (en) * | 2016-04-07 | 2017-10-12 | Schlumberger Technology Corporation | Pump Assembly Health Assessment |
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