SU1191567A1 - Turbogenerator unit for independent downhole instruments - Google Patents

Abstract

TURBO-GENERATING UNIT FOR AUTONOMOUS WELL-BASED INSTRUMENTS according to avt.S.№. The body and end seals and the cavity of the increased pressure of the lubricator are made in the internal rod of the lubricator, and the movable hollow brush is disconnected from the piston of the lubricator and has a spring placed between the rotor housing and the inner flange of the stem.

Description

with

O1

05

eleven

The invention relates to the field of oil and gas industry, in particular, to converters of energy from a flush fluid circulating in a well into electrical energy and devices designed to supply electrical energy to downhole autonomous measurement systems and instruments.

The purpose of the invention is to reduce the frequency of refueling the unit with lubricant during operation and reduce its dimensions.

The drawing shows a diagram of the turbogenerator unit and part of the drill string.

The turbogenerator assembly has a water turbine, including a rotor drum 1 with working blades, a drum 2, and a stator housing 3 with stator blades. In the cradle of the drum 2 is placed retractable: a hollow rod 4 with a spring 5 located between the rotor body 1 and the inside of the stem 4, the check valve 6 and the stopper 7. In the inner cavity of the rotor drum 1 there is a plunger piston 8 fixed on the inner movable rod 9, in which I placed the spring 10 of the lubricator.

The hydro turbine is connected via a hollow drive shaft 11 to an alternating current generator consisting of rotor 12 permanent magnets), stator coil 13, housing 14. The hollow drive shaft has two supports — the top 15 in the form of twin angular contact ball bearings and the bottom 16 in the form radial ball bearing placed in the lower housing 17. For sealing the internal cavity, a reinforced rubber-o-ring seal 18, face 19, placed in the nut 20, one-hundred-night 21 and impeller 22 seals made on the rotor drum 1, and abirinty ramjet seal

23.On the body of the generator 14 is installed len oil oil rubber compensator

24, protected by a casing 25. The lubricator 8 sprays the internal oil-filled cavity of the turbogenerator into two cavities: sub-piston A (reduced-pressure cavity) and over-piston B (sub-piston pressure). Nadporshnev cavity B through the channel 26 and the annular groove on the inner movable rod together 672

with a sealed area of the mechanical seal. The piston cavity A through the channel 27 and the adjacent stem bore is connected to the lower part of the lubricator piston 8. To fill the cavity A with oil, the lower body has a plug 28 and a check valve 29. The electricity from the turbogenerator is used through

electrovyuod 30. Turbogenerating unit is installed directly in the string of drill pipe 31. The arrows in the drawing indicate the direction of movement of lubricants

inside the turbogenerator unit.

The cavity A and communicating with it zones are filled with transformer oil through a plug 28, and a check valve 29. The cavity B and communicating

with it, the zones are filled with grease tread grease through a removable hollow rod 4.

Turbogenerator unit work-. melts as follows.

When refueling the unit at the beginning

through the plug 28, transformer oil is poured in, then a grease-tread lubricant is pumped through the rod 4, which affects the

the piston of the lubricator 8 and the rod 4, moves them in different directions and compresses the springs 10 and 5 and inflates the compensator 24. Full upward movement of the rod 4 characterizes the final

unit refueling.

In the process of operation of the turbogenerator unit using the energy of the hydraulic flow of the washing liquid, the compensator 24

performs the buffer transfer of downhole pressure to the oil-filled cavity A of the generator and the sub piston of the lubricator 8 through the channel 27 of the rod 9. The lubricator 8 for

the counting of the spring 10 creates an overpressure cavity B, from where, through the channel 26 of the rod 9, it is transferred to the zone between the lip seal 18 and the mechanical seal 19, in which additional

sealing zones of the type of breathing sealing zones; This leads to a reliable separation of the oil-filled cavities A and B, both among themselves and from the washing liquid. As the lubricant is consumed due to its being pushed by the lubricator 8, the retractable hollow rod 4 is acting 3

The spring 5 moves inward. According to the size of its movement, the presence of the lubricant is monitored and, if necessary, re-injection is carried out.

The placement of the piston of the lubricator 8 in the inner cavity of the rotor drum 1 of the hydraulic turbine, which is several times larger than the shaft shaft 11, allowed a sharp increase in the volume

1 22 2Z 2 20 19 Id 27

// / / / / / / /

;;,. /. X

l V) 7 y-y / / / I / / I i1915674

In addition, since the retractable hollow rod 4 is disconnected from the lubricator piston 8, its movement does not affect the movement of the rod 4 and depends on its dimensions and a predetermined design value. movement, JO, which leads to a reduction in overall dimensions of the unit.

/ 4 12/3 2S 28 / I I I

Claims (1)

(The 5th TURBOGENERATOR UNIT FOR STAND-ALONE BOREHOLES, according to autost No. 100b738, is distinguished by the fact that, in order to reduce the downtime of the well and reduce the dimensions of the generating unit, the lubricator piston is located in the inner cavity of the rotor drum of the turbine turbine channels, messages cavity between the rubber seal and mechanical seals and the cavity of the increased pressure of the lubricator is made in the inner rod of the lubricator, and the movable hollow rod is disconnected from the piston of the lubricator and has a spring located between at the rotor housing and the inner flange of the rod.