Implosion device on cable for inspection of oil and gas well layers

FIELD: measuring equipment.

SUBSTANCE: invention is related to hydrodynamic research of oil and gas wells, and may be used to study physical properties of their layers. Device comprises implosion chamber, packer module, moisture gauge, resistivity metre, sampler, module of samplers, slide valve unit, additional pressure sensor arranged over packer module. Besides slide valve unit is equipped with valves and installed over module of samplers with the possibility to switch flow of samples over to implosion chamber arranged in upper part of device, and to module of samplers through sampler, which comprises differential pistons, and sampler and implosion chamber are connected to well bore zone via vertical channel, where moisture metre, resistivity metre, sensor of layer pressure and temperature sensor are installed.

EFFECT: improved accuracy of research of hydrodynamic characteristics of oil and gas wells and improved quality of formation fluid samples at various depth due to elimination of well fluid effect at results of samples analysis and taking.

3 cl, 3 dwg

 

The invention relates to hydrodynamic studies of oil and gas wells and can be used to study the physical properties of their beds.

The closest to the proposed device is a device containing an Electromechanical actuator, a sampler of implosion chamber, a packer module, spool hub, the pressure sensor of the reservoir and the temperature sensor (patent RF №2199009, IPC EV 49/00, publ. 2003.02.20).

The disadvantages of this device are the design complexity and low reliability due to the presence of multiple shear elements. In addition, in the process of research and sampling is not controlled by the quality of insulation of the reservoir interval packer module, in a single run takes only one sample, taken from the first portion of the liquid received in the implosion chamber, and investigated only two parameters - pressure and temperature of the fluid. There is no quality control sampling for the presence of hydrocarbons and water samples collected notoriously poor. This reduces the accuracy of the study of hydrodynamic characteristics of the formations of oil and gas wells.

The objective of the invention is to improve the accuracy of the study of the hydrodynamic characteristics of the formations of oil and gas wells and improving the quality of sampling place the new fluids at different(Oh) intervals (depth) due to the exclusion of influence of the well fluid on the results of the study and sampling.

The problem is solved in that the apparatus includes an Electromechanical actuator, a sampler of implosion chamber, a packer module, spool hub, the pressure sensor reservoir, located under the packer module and the temperature sensor is further provided with a moisture meter, resistivity meter, module prosobonia, an additional pressure sensor located above the packer module, and emergency boss to capture and retrieval apparatus in emergency situations, above the implosion of the camera, when the spool Assembly is provided with valves and is located above the module prosobonia switchable flow of samples to the implosion chamber located in the upper part of the device, and the module prosobonia through the sampler, which contains the differential pistons, and the sampler and implosion chamber is connected with the near-wellbore area through the vertical channel, which has a moisture meter, resistivity meter, pressure sensor reservoir and the temperature sensor.

Figure 1 shows the diagram of the inventive device.

The device includes a housing 1, a hollow stem 2, which is the actuator 3 thrust 4, valves 5 and 6, the spool site 7, located at the end of the hollow rod 2, the hydraulic booster 8, shear washer 9, a piston 10, the sampler 11, a differential piston 12, soobsheni the through channel 13 to the well, probability 14, communicated through radial channels 15 with the cavity And the sampler 11, packer module, consisting of two packers 16 and 17, each of which consists of a fixed 18 and 19 rolling flanges, rubber cuff 20 hard and soft 21 located on the outer surface of the housing 1, the plunger 22 rigidly mounted on the hollow shaft 2, channel 23, which tells the sampler 11 through valves 5 and 6, with well implosion chamber 24 connected through the channel 25 and the valves 5 and 6, with well Electromechanical actuator 26 by screws 27, rigidly fixed to the shaft 2, the emergency site, consisting of a casing 28, adjustably mounted on a Electromechanical actuator 26, shear washer 29, the stop 30, the vertical channel 31 which is connected with the hydraulic booster 8, pressure sensors 32, 33, 34 and the temperature sensor 35, the hygrometer 36, resistivity meter 37, the cable 38, which is conductive and the load-carrying element of the device, the remote control 39 control and receive information from sensors 32, 33, 34, 35, 36, 37, emergency lug 40 to capture and retrieval of the device in case of emergency situations, the cavity B, formed between thrust 4 and the hollow shaft 2, the cavity, where the atmospheric pressure, and the cavity G, where high pressure (liquid filled), the mount 41 of the cable 38 to the housing 1.

The device works in the following way (figure 2).

The implosion device to study the reservoir is in oil and gas wells on the cable 38 is lowered into the borehole to the desired depth and fix packer module 16, 17 on the roof of the studied reservoir. For this to remote control and receive information 39 serves current straight polarity, the motor 26. The screw 27 is moved upward together with the hollow shaft 2, the plunger 22 correspondingly moves upward the movable flange 19, a rubber cuff 20 and 21 are deformed and increase in cross-section, since they are limited on the other side of the fixed flange 18, reach the borehole wall (rock) and isolate the annular space of the well between the casing 1, the barrel (breed) and packers 16, 17. The motor 3 serves current straight polarity, and the rod 4 together with the valve 5 is moved up. The channels 23 and 25 are connected with each other. The fluid in the isolated annular space B, rushes in implosion chamber 24, where the pressure is atmospheric, clay crust formed on the barrel wall (rock), is destroyed, and the reservoir fluids are in implosion chamber 24. At this time, the pressure sensor 34 detects a pressure drop in the channel 23, it means the beginning of the study and sampling. 15-20 to stop the flow of fluids in the implosion chamber 24, to which the actuator 3 serves a current of reverse polarity, rod 4 together with the valves 5 and 6 moves down and closes the channels 23 and 25. The temperature sensor 35 measures the temperature of the reservoir fluid throughout the process of research. The sensor 34 detects pressure, then measure the fractional composition and content of hydrocarbons with sensors 36 and 37, the testimony is fixed on the panel 39. The sensors 32 and 33 fixed pressure in the well above and below the packer module in the process of research and sampling. In an unpressurized landing packer 16 or when there is hydraulic connection of the isolated section of the formation to the well (through the cracks) sensor 32 indicates a pressure decrease, and if the packer 17 is planted negerlein or there is a hydraulic connection pedacinho area well insulated space B through the bottomhole formation zone, the sensor 33 shows the decrease in pressure. Then again open the channels 23 and 25 with electric drive 3 with the purpose of the formation fluids in the implosion chamber 24, and then measure the fractional composition and the content of hydrocarbons in them and the pressure of the reservoir through sensors, respectively, 36, 37, 34. Positive dynamics in the evidence sample is taken in probobally 14. For this purpose, the motor 3 serves a current of reverse polarity, rod 4 moves the valves 5 and 6 up, the channel 23 is opened and the channel 25 is closed, and the reservoir fluids through the channel 23 and the space B is held in the cavity And the sampler 11, a differential piston 12 moves up speed as its completion, as it weighs g grotticelle pressure of the well through the channel 13, at the same time, the sensor 34 measures the pressure of the reservoir dynamics in the sampling process. After you restore reservoir pressure (based on sensor readings 34) the collected sample is sent to probobally 14. For this purpose Electromechanical actuator 26 serves a current of reverse polarity, the screw 27 is moved down together with the hollow shaft 2, the spool node 7 goes down and opens the radial channel 15, reservoir fluids from the cavity And the sampler 11 flow into probobally 14 where the pressure is less than the reservoir, and fill it. When the movement of the hollow rod 2 down the plunger 22 with a movable flange 19 also moves downward, the rubber cuff 20 and 21 take the starting position. For examining and taking samples from the subsequent interval of the reservoir device is being pushed down by the value of h equal to the distance between the two packers 16 and 17, planted on the roof of the studied reservoir, and then all the operations are repeated. When abnormal, emergency situations, the capture device for emergency lug, located in the upper part, above the implosion of the camera, and then removed from the well.

In case of emergency in case of failure of the electric drive 3 or breaking of the cable 38 breakdown packer module or removing the entire apparatus is as follows.

Creates a force on the cable 38 with the mouth, shear washer 29 is destroyed, oguh 28 is moved upward relative to the housing 1 until it stops 30, the vertical channel 31 is communicated with the well cavity, while the hydrostatic well pressure acts on the hydraulic booster 8, which creates a high pressure in the cavity, Under this pressure, the piston 10 moves down and destroys the shear washer 9, the hollow body 1 is displaced by the distance L down together with the plunger 22, the rubber cuff 20 and 21 take the starting position, the packer module is plucked from the walls of the reservoir (figure 3), and the apparatus is removed upward from the well.

In the case when the machine caught the rock is extracted as follows.

Creates a force on the cable 38 from the wellhead, the apparatus when it is terminated at the location of the mount 41, further down the outer Rublevka on the tubing string or drill pipe. Rublevka captures the apparatus for the boss 40 and creation efforts aimed up, destroyed shear washer 9. The plunger 22, hard rubber cuff 20, rubber soft sleeve 21 together with a movable flange 19 are shifted down relative to the housing 1, the packer module is plucked from the walls of the reservoir, and the apparatus is removed from the well.

The proposed solution provides a qualitative study of the formation and capture of high-quality samples by excluding the effects of borehole fluid on the results of the study and samples. Samples taken at different sites do not mix with other the slaves twisted, that ensures the quality of the studied fluids. The design of the device allows for a single run of the device to carry out a study of the reservoir and the sampling manifold and to take as many samples as there are prosobonia in the module. The proposed device allows to investigate the dynamics of the fluid on the basis of which a conclusion is made about the intensity of the return oil from the reservoir, and to take samples. When using the proposed system reduces the time for tripping operations excluded because of repeated and multiple runs on the study of reservoirs and sampling that reduces costs, ensures the production of layers in a cost-effective mode. Provided high quality research and sampling, reflecting the true state of the reservoir, and high-quality operation of the reservoir.

1. The implosion device on the cable for the study of formations of oil and gas wells, comprising an Electromechanical actuator, a sampler of implosion chamber, a packer module, spool hub, the pressure sensor reservoir, located under the packer module and the temperature sensor, wherein the apparatus is further provided with a moisture meter, resistivity meter, module prosobonia and additional pressure sensor located above the packer and the adulam, when the spool Assembly is provided with valves and is located above the module prosobonia switchable flow of samples to the implosion chamber located in the upper part of the device, and the module prosobonia through the sampler, which contains the differential piston and the sampler and implosion chamber is connected with the near-wellbore area through the vertical channel, which has a moisture meter, resistivity meter, pressure sensor reservoir and the temperature sensor.

2. The implosion device on the cable for the study of formations of oil and gas wells according to claim 1, characterized in that it is equipped with an emergency boss to capture and retrieval apparatus in emergency situations, above the implosion chamber.

3. The implosion device on the cable for the study of formations of oil and gas wells according to claim 1, characterized in that the rubber seal packer module made with different hardness and elasticity.



 

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