Progressing Cavity Pump PCP
Moderator: Production
-
sebasmagri
- Senior member
- Posts: 168
- Joined: Tue May 08, 2007 11:48 pm
- Location: San José de Guanipa
- Contact:
Dear Fanarco could you please send me the information to my mail? I will appreciate a lot. Thanks.
juanitomt@msn.com
juanitomt@msn.com
Guys !!!!!!
Below is some of PCP information :
BENEFITS OF PROGRESSING
CAVITY PUMPS
From the standpoint of flow and pressure range, PC pumps compete
well with any other type of pump design. They can handle
pump flows from fractions of gallons per minute to several thousand
gallons per minute. Pressure capability depends on the number
of stages (leads of the stator), and typically reaches 800-1,000
psi. The range of fluids they can handle is enormous, with viscosities
ranging from waterlike (1 cSt), to fluidlike (clay, cement,
and sludge with viscosities up to 1,000,000 cSt).
Since the rotor and stator have an interference fit (a plated
metallic rotor in an elastomer-lined stator), and low rotating
speed, the internal shear rates are very low. When applied in the
food industry, these pumps are sometimes known to pump cherries
or apples, which move through the internal passages with no
damage. The pulsation-free flow and quiet operation of PC
pumps are additional advantages for shear-sensitive pumpages.
Below is some of PCP information :
BENEFITS OF PROGRESSING
CAVITY PUMPS
From the standpoint of flow and pressure range, PC pumps compete
well with any other type of pump design. They can handle
pump flows from fractions of gallons per minute to several thousand
gallons per minute. Pressure capability depends on the number
of stages (leads of the stator), and typically reaches 800-1,000
psi. The range of fluids they can handle is enormous, with viscosities
ranging from waterlike (1 cSt), to fluidlike (clay, cement,
and sludge with viscosities up to 1,000,000 cSt).
Since the rotor and stator have an interference fit (a plated
metallic rotor in an elastomer-lined stator), and low rotating
speed, the internal shear rates are very low. When applied in the
food industry, these pumps are sometimes known to pump cherries
or apples, which move through the internal passages with no
damage. The pulsation-free flow and quiet operation of PC
pumps are additional advantages for shear-sensitive pumpages.
PC pumps are excellent self-primers and have good suction
characteristics. They are tolerant to entrained air and
gases, and produce minimal churning or foaming.
Another major feature of these machines is their high tolerance
to contamination and abrasion. Often called a "lastresource
pump," PC pumps are often utilized for extremely
abrasive applications, because of a unique property of the elastomer
that lines up the stator tube and resists abrasion. These
elastomers are made from regular rubber (Buna) or more
exotic materials, such as Viton
characteristics. They are tolerant to entrained air and
gases, and produce minimal churning or foaming.
Another major feature of these machines is their high tolerance
to contamination and abrasion. Often called a "lastresource
pump," PC pumps are often utilized for extremely
abrasive applications, because of a unique property of the elastomer
that lines up the stator tube and resists abrasion. These
elastomers are made from regular rubber (Buna) or more
exotic materials, such as Viton
Another reason for PC pumps' larger size is their low
speed, which requires a gear reducer (or a belt drive) between
the motor driver and the pump. This can result in added cost.
However, the recent advent of variable frequency drives
(VFDs) has allowed elimination of gear reducers and, at the
same time, has introduced a new capability to vary flow while
pumping against a given pressure.
Another PC pump limitation is fluid compatibility with the
elastomer. Some chemicals may cause problems with the elastomer
and others may cause swelling. For corrosive applications,
Viton
speed, which requires a gear reducer (or a belt drive) between
the motor driver and the pump. This can result in added cost.
However, the recent advent of variable frequency drives
(VFDs) has allowed elimination of gear reducers and, at the
same time, has introduced a new capability to vary flow while
pumping against a given pressure.
Another PC pump limitation is fluid compatibility with the
elastomer. Some chemicals may cause problems with the elastomer
and others may cause swelling. For corrosive applications,
Viton
THREE MAIN TYPES OF
PROGRESSING CAVITY MACHINES:
PCPs9 DHPs5 AND DHMs
As shown in Figs. 1 and 2, a PC pump basically consists of a hydraulic section (a rotor inside a stator) and a drive frame transmitting the shaft rotation to the hydraulic section by means of a connecting rod. The connection is accomplished by various means: a pin joint, a universal joint (such as Cardan
PROGRESSING CAVITY MACHINES:
PCPs9 DHPs5 AND DHMs
As shown in Figs. 1 and 2, a PC pump basically consists of a hydraulic section (a rotor inside a stator) and a drive frame transmitting the shaft rotation to the hydraulic section by means of a connecting rod. The connection is accomplished by various means: a pin joint, a universal joint (such as Cardan
If such a pump is connected to a generator instead of an electric motor or any other load (e.g., a drill bit), and the rotor FIGURE 1
Typical progressing cavity pump (courtesy Monoflo Pump). is allowed to rotate driven by the differential pressure, the pump essentially becomes a hydraulic motor, per terminology of PD machines. (Note the similarity with centrifugal pumps operating as hydraulic recovery turbines when operated in reverse.) It utilizes the fluid's energy to convert it to the mechanical energy of the rotating shaft
Typical progressing cavity pump (courtesy Monoflo Pump). is allowed to rotate driven by the differential pressure, the pump essentially becomes a hydraulic motor, per terminology of PD machines. (Note the similarity with centrifugal pumps operating as hydraulic recovery turbines when operated in reverse.) It utilizes the fluid's energy to convert it to the mechanical energy of the rotating shaft
petrochemical plants, paper mills, utilities, wastewater treatment plants, etc. They require much less space than the complete "string" of downhole mudmotor applications. A surface pump manufacturer supplies a complete pump unit, often mounted on a base plate and coupled to an electric motor or other driver. The customer or a contractor's millwright crew connects the piping and electric power, and the pump is ready to operate. In the case of mudmotors (DHMs), however, the power section is typically supplied by a subvendor (often the same one who manufactures complete PC pumps and has the facilities and know-how to produce power sections
Power sections (which are actually pumping sections for downhole pumps) are supplied unthreaded by the subvendors, for subsequent completion by the "string" manufacturer. This commercial practice is part of a tradition, history, and culture in the oil industry dating back many years. PC pumps have a low "lobe ratio", such as 1:2 (a one-lobed rotor inside of a twolobed
stator), although 2:3 lobe ratio designs have recently been introduced. Mudmotors usually have multilobe configurations to as high as 9:10. Geometry and space constraints inside the drilled hole require that power sections must be as short as possible (i.e., having fewer stages), with more pressure drop per stage (i.e., more power and torque concentration per unit length).
stator), although 2:3 lobe ratio designs have recently been introduced. Mudmotors usually have multilobe configurations to as high as 9:10. Geometry and space constraints inside the drilled hole require that power sections must be as short as possible (i.e., having fewer stages), with more pressure drop per stage (i.e., more power and torque concentration per unit length).