Combining the advantages of the Progress Cavity Pump with the Electric Submersible Pump, ESPCP is especially suitable for those oil extraction in deep well, slant well and horizontal well.

The ground water exploit mainly relies on deep well diving pump for drawing water, that is to say, the cost depends primarily on electricity consumption.

One hydropower station is the second class hydropower station, The hydropower station adopts guide water to generate electricity, The control of dam's gate is made up of the Spillway sluice, Flushing sluice, Breast wall and pump for deep well, Because the original system adopts the routine to control, Dependability is low, Do not accord with the request that the computer monitoring, So It is essential for the original control system to renew.

The equipments of sucker rod oil pumping system are vital important in the whole production of crude oil. And the loss, which is caused by the fault of sucker rod oil pumping equipment, especially those equipments which are in the deep well, is extremely huge.

The relationship between heat flow measurement and earthquake prediction and the state-of-the-art of the heat flow measurement technology are described briefly. Theoretical and experimental results of an optical fibre sensor for deep well groundwater temper erature gradient measurement, which can measure temperature at the accuracyof of 10^5 to 10^- 6 ℃ and can get 10^5 heat flow values at one measurement, are given in detail.

Here we describe how a multiscale analysis can be used to describe the magnetic susceptibility data scaling properties for a deep well (KTB, Germany), down to about 9000 m.

-A 3600 m deep well has been used to conduct large water injection tests in the Rhine Graben.

In-situ fluid-pressure measurements for earthquake prediction: An example from a deep well at Hi Vista, California

By the aid of these instruments microseismic observations were performed for the first time in a north German deep well in 1968.

A deep well seismometer and its auxiliary systems were developed in the Sektion Geowissenschaften der Bergakademic Freiberg.

Groundwater temperature gradient in a deep well precisely reflects heat flow value at that point. The relationship between heat flow measurement and earthquake prediction and the state-of-the-art of the heat flow measurement technology are described briefly. Theoretical and experimental results of an optical fibre sensor for deep well groundwater temper erature gradient measurement, which can measure temperature at the accuracyof of 10^5 to 10^- 6 ℃ and can get 10^5 heat flow values at one measurement,...

Groundwater temperature gradient in a deep well precisely reflects heat flow value at that point. The relationship between heat flow measurement and earthquake prediction and the state-of-the-art of the heat flow measurement technology are described briefly. Theoretical and experimental results of an optical fibre sensor for deep well groundwater temper erature gradient measurement, which can measure temperature at the accuracyof of 10^5 to 10^- 6 ℃ and can get 10^5 heat flow values at one measurement, are given in detail.

This paper makes a break--through in the control method for level and flow inwater service system with deep well pump, which is usually emplemented by PID linear feedback control and conventional bang--bang control. The parameter self--adjusting nonlinear conlrol strategy is proposed for first time and the large capacity frequency converter is developed toreform the constant speed system of deep well pump. The new strategy which overcomes theunfavourable effect resulting from the inherent nonlinearity...

This paper makes a break--through in the control method for level and flow inwater service system with deep well pump, which is usually emplemented by PID linear feedback control and conventional bang--bang control. The parameter self--adjusting nonlinear conlrol strategy is proposed for first time and the large capacity frequency converter is developed toreform the constant speed system of deep well pump. The new strategy which overcomes theunfavourable effect resulting from the inherent nonlinearity of the asynchronous motor and water pump, realizes the high reliability, stronger robustness control for deep well pump with alow cost. These kinds of systems have been put in to operation since July 1992 to replace theconstant speed system. It has been proved that these systems are convenient to use and are reliable. Moreover, it can achieve substantial effects in water--saving and energy--saving.

This paper presents the study and applications of water jet technology in petroleum engineering. A mathematic model of pressure and water power attenuation, under the condition of submergence and non\|freedom, is setup through experiments. A novel method and its model are established to gain maximum hydraulic power at bottomhole and optimize water parameters. In addition, the basic equation and structure model of two kinds of resonating chamber are set up according to transient flow theory and hydro\|acoustics....

This paper presents the study and applications of water jet technology in petroleum engineering. A mathematic model of pressure and water power attenuation, under the condition of submergence and non\|freedom, is setup through experiments. A novel method and its model are established to gain maximum hydraulic power at bottomhole and optimize water parameters. In addition, the basic equation and structure model of two kinds of resonating chamber are set up according to transient flow theory and hydro\|acoustics. Under the impact of drilling biaxial stress, a model of predicting the fracture propagation is founded utilizing rock fracture mechanics. On the base of above models and theories, three new kinds of bits, i.e. extended nozzle roller bit, self\|resonating water jet bit and combined jet and mechanical rock\|cutting bit, are developed. Also, the paper points the prospects of applications of water jet technology in deep\|well drilling, low\|permeability reservoir production, and enhanced oil production. [