Multi-stage hydraulic jet pump
a jet pump and multi-stage technology, applied in the field of jet pumps, can solve the problems of choking flow condition, severe eroded pump, and current and prior art jet pumps are not cure-alls for every instance of low bore pressure, so as to reduce cavitation, increase production, and reduce the effect of pressure potential
Inactive Publication Date: 2014-01-30
ZACHARIAH DAVID
View PDF3 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The patent describes a pumping system that uses two stages to increase the pressure of fluid. The first stage increases the pressure of the fluid using a jet pump, which allows the second stage to maintain the fluid at a higher pressure. This results in produced fluid with a higher pressure potential than could be achieved by a single-stage pump without risk of cavitation. Using a two-stage pump can also allow for increased production from oil wells or dewatering of gas wells. Additionally, the patent suggests that increasing the efficiency of the overall system by boosting the inlet pressure to the second stage can reduce the amount of pressure and energy required to use hydraulics to produce a given well.
Problems solved by technology
However, current and prior art jet pumps are not a cure-all for every instance of low bore pressure.
This state will result in a choked flow condition.
Additionally, the downstream collapse of the cavitation bubbles can severely erode the pump.
The increased mismatch between power fluid velocity and produced fluid velocity makes the shear zone between them more severe, which in turns increases the intensity of the turbulent vortices formed at the interface between the two fluids.
Subsequent downstream collapse of these bubbles can cause erosion of the pump, even though the overall pressure level is not low enough to cause the choked flow condition.
Another consequence of oversizing the pump is that it will operate well below its efficiency peak.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025]Referring to FIG. 1, a cross-sectional view of one embodiment of a multi-stage jet pump of the present invention is shown. In a preferred embodiment, bottom hole assembly 210 of FIG. 2 is utilized to position the multi-stage jet pump 10 of FIG. 1, and to split the power fluid received at power fluid intake 212 into first stage power fluid conduit 214 and second stage power fluid conduit 216. (See FIG. 3B).
[0026]Referring to FIGS. 1 and 3B, power fluid in first stage power fluid conduit 214 continues down to first stage power fluid inlet 18. The pressure of first stage power fluid flow 14 may be reduced by a restrictor, such as orifice plate 20. The pressure of first stage power fluid flow 14 is “converted” to velocity by reducing its cross section at first stage reduction 22.
[0027]Power fluid in the first stage then passes through first stage jet inlet 24 and first stage jet 26, then into first stage mixing chamber 28. Bottom hole production fluid enters the multi-stage jet pu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A multi-stage hydraulic jet pump for use in downhole environments is described.
Description
FIELD OF THE INVENTION[0001]The invention pertains to jet pumps, such as those used to enhance production in downhole environments.BACKGROUND OF THE INVENTION[0002]Single hydraulic jet pumps are well known and documented in the oil and gas industry. Such pumps are used to increase the recovery of fluids such as oil and gas when the downhole fluid pressure is lower than desired. For example, U.S. Pat. No. 7,255,175 (“the '175 patent”) to Jackson, et al. discloses a jet pump for use with a fluid recovery system.[0003]Similarly, U.S. Pat. No. 5,372,190 (“the 190 patent”) to Coleman discloses a jet pump that is similar in design to that of the '175 patent. The disclosures of both the '190 and the '175 patents note that jet pumps have significant advantages over other types of prior art pumps, such as the ability to handle more solid materials in the flow stream.[0004]Current art jet pumps allow the operator to pump a power fluid down the wellbore, pass the power fluid through a first co...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): F04F5/54
CPCF04F5/54
Inventor ZACHARIAH, DAVID
Owner ZACHARIAH DAVID