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A kind of mud pulse generator oil filling device and using method

A pulse generator and mud pulse technology, applied in the field of wireless inclinometer while drilling, can solve the problems of inability to transmit signals, long oil filling time, pulse damage, etc., to save drilling and maintenance costs, prolong maintenance period, and oil filling Efficient effect

Active Publication Date: 2018-08-21
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the downhole high temperature and high pressure environment, the volume change rate of silicone oil is small, but the volume change rate of air is very obvious. If the oil filling effect is not ideal and there is too much residual air in the cavity, the pulse generator will not work normally after thermal expansion, and the signal Unable to transmit, directly affecting the normal use of downhole instrument strings
The oil filling device of the conventional mud pulse generator takes a long time to fill the oil, and it relies on beating and piercing to assist gas removal. The manual workload is large, and it is easy to cause damage to the pulse during the oil filling stage.

Method used

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  • A kind of mud pulse generator oil filling device and using method
  • A kind of mud pulse generator oil filling device and using method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, see attached figure 1 , a mud pulse generator oil filling device, which includes: a vacuum oil cup 3, a breather filter 4, a circulation pump 9, an oil storage tank 10, a vacuum pump 11 and a negative pressure assembly 13, and the peripheral equipment is a pulse generator 14;

[0019] See attached figure 2 , the negative pressure assembly 13 includes: a housing 15 provided with a quick joint 16 and a slow air release valve 17; the housing 15 is installed outside the compensating membrane of the pulse generator 14 through a rubber sleeve 18 and a clamp 19;

[0020] The overall connection relationship of the oil filling device is: on the one hand, the vacuum pump 11 is connected to the quick connector 16 of the negative pressure assembly 13 through the first solenoid valve 7-1, and on the other hand, it is connected to the second solenoid valve 7-2 and the ventilation filter 4 in turn. To the vacuum oil cup 3; the vacuum oil cup 3 is provided with a pressu...

Embodiment 2

[0023] Embodiment 2, the use method of the mud pulse generator oil filling device, it uses the mud pulse generator oil filling device as described in embodiment 1;

[0024] In the initial state, all solenoid valves are closed;

[0025] The liquid level sensor 5 monitors the oil position inside the vacuum oil cup 3. When the oil in the vacuum oil cup 3 is lower than the set value, the liquid level sensor 5 feeds back a signal to the circuit control assembly, and the circuit control assembly controls the second electromagnetic The valve 7-2 and the vacuum pump 11 are opened, and the vacuum pump 11 vacuumizes the vacuum oil cup 3; when the pressure gauge 6 detects that the pressure in the vacuum oil cup 3 reaches the requirement, the circuit control assembly closes the vacuum pump 11 and the second solenoid valve 7 -2, open the third solenoid valve 7-3 at the same time, supply oil to the vacuum oil cup 3 through the oil storage tank 10, when the oil inside the vacuum oil cup 3 re...

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Abstract

The invention belongs to the technical field of measurement while drilling inclinometers, and particularly relates to an oil feeding device. The mud pulse generator oil feeding device comprises a vacuum oil cup, a vent filter, a circulating pump, an oil storage tank, a solenoid valve, a vacuum pump and a negative pressure assembly, and peripheral equipment is a pulse generator. One end of the vent filter is chained with the vacuum pump, the other end of the vent filter is chained with the vacuum oil cup, and oil is effectively prevented from being sucked into the vacuum pump. A liquid level sensor is installed inside the vacuum oil cup, and controls the amount of oil inside the vacuum oil cup. The negative pressure assembly is installed outside a compensation film of the pulse generator, and the upper portion of the negative pressure assembly is provided with a slow release valve and a connector chained with the vacuum pump. A circuit control assembly controls the operation of the vacuum pump and the circulating pump and turning on and off of the solenoid valve, so that repeated oil feeding into the pulse generator is achieved. The mud pulse generator oil feeding device is easy to operate, can effectively remove air left inside a pulse cavity through repeated oil feeding, is high in oil feeding efficiency, prolongs the maintenance period of the pulse generator and saves well drilling and maintenance cost.

Description

technical field [0001] The invention belongs to the technical field of wireless inclinometers while drilling, and in particular relates to an oil filling device. Background technique [0002] The pulse generator is an essential part of the wireless inclinometer while drilling (MWD), responsible for the generation of pulse signals of downhole instruments. In order for the pulse generator to work normally in the well, it is necessary to fill the working chamber of the pulse mechanical movement with oil to lubricate and balance the pressure. In the downhole high temperature and high pressure environment, the volume change rate of silicone oil is small, but the volume change rate of air is very obvious. If the oil filling effect is not ideal and there is too much residual air in the cavity, the pulse generator will not work normally after thermal expansion, and the signal Failure to transmit directly affects the normal use of downhole instrument strings. The oil filling device...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16N7/40F16N17/06F16N23/00F16N29/02F16N39/00E21B47/02E21B47/18
CPCE21B47/02E21B47/18F16N7/40F16N17/06F16N23/00F16N29/02F16N39/002F16N2250/18F16N2280/02
Inventor 马朝选林坤王洁冰侯永伟亢楠楠郭嗣杰
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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