Downhole jet pump

a jet pump and downhole technology, applied in the field of pumps, can solve the problems of affecting the operation of the well, so as to achieve the effect of reducing the pressure of the well, and preventing the accumulative fluid from falling o

Inactive Publication Date: 2006-10-12
MSE TECH APPL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] The jet pump can be comprised of a plurality of subparts which connect to form the jet pump. One or more pins and pin openings can be provided for enabling proper alignment of the subparts. In one embodiment, pressurized gas is p

Problems solved by technology

Increasing production demands and the need to extend the economic life of oil and gas wells have long posed a variety of problems.
In time, the bottom hole pressure will decrease to such an extent that the pressure will be insufficient to lift the accumulated fluids to the surface.
In such cases, the well bore may log off and possibly be plugged prematurely for economic reasons.
The most common method is the use of a pump jack (reciprocating pump), but pump jack systems have given rise to additional problems.
Pump jack systems require a large mass of steel to be installed on the surface and comprise several moving parts, including counter balance weights, which pose a significant risk of serious injury to operators.
Additionally, this type of artificial lift system causes wear to well tubing due to pumping rods that are constantly moving up and down inside the tubing.
Consequently, pump jack systems have significant service costs, which negatively impact the economic viability of a well.
This adds significant costs to the production of hydrocarbons from the well.
In addition, plunger lift systems eventually become ineffective due to lower reservoir pressures than are required to lift the piston to the surface to evacuate the built up liquids.
While this design does not have the above-described drawbacks inherent in the pump jack and plunger lift systems, it still includes moving parts (impeller / turbine blades) which increases the potential for wear and malfunction.

Method used

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Embodiment Construction

[0033] The term “tubing” as used throughout the specification and claims is intended to include all elongated elements having at least one opening extending the length of said element. As such, the term “tubing” includes any and all pipes, tubes, extruded hollow members, cast hollow members, collars, nipples, reducers, couplers, and the like, as well as combinations and multiples thereof. The term “tubing string” as used throughout the specification and claims is intended to include one or more pieces of tubing.

[0034] The present invention is a novel downhole pump for use in the removal of fluids from wells, especially, but not limited to, wells that have insufficient bottom hole pressure to lift the well liquids out of the well bore and to the surface. In its typical use, the pump is disposed downhole in a well adjacent the bottom of the well or the hydrocarbon-producing formation. Referring now to FIGS. 1A-1C, there is shown a preferred embodiment of the pump assembly 10 of prese...

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Abstract

A downhole jet pump wherein pressurized gas from an outside portion of a string of tubing is directed through a nozzle having a venturi which causes fluids to be sucked from an outside portion of the string of tubing and ejected through an inside portion of the sting of tubing.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority to and the benefit of the filing of U.S. Provisional Patent Application Ser. No. 60 / 645,806, entitled “Downhole Well Pump”, filed on Jan. 21, 2005, and the specification and drawings thereof are incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention relates generally to a pump for removing fluids from a cased hole, i.e. a well bore. More particularly, the present invention relates to a novel downhole, gas-driven pump, with no moving parts, particularly suitable for removing fluids from hydrocarbon producing wells. BACKGROUND OF THE INVENTION [0003] Increasing production demands and the need to extend the economic life of oil and gas wells have long posed a variety of problems. For example, as natural gas is produced, from a reservoir, the pressure within the reservoir decreases over time and some fluids that are entrained in the gas stream with higher pressures, break out du...

Claims

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Application Information

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IPC IPC(8): E21B43/00
CPCE21B43/124
InventorJOHNSON, KENNETH G.LYONS, WILLIAMJOHNSON, STEVEN E.KUJAWA, STEPHAN T.SIMMONS, GLOYD A.NIKOLIC-TIRKAS, BOJANA
OwnerMSE TECH APPL