RU2335626C1 - Facility of well for simultaneous-separate operation of two beds - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: facility includes pipe column, pump, packer and subsurface instrument. According to the invention a facility additionally contains a sleeve communicated with the pipe column; the said sleeve is designed with a side aperture located above the packer and under the pump. In the side aperture of the sleeve there is a pipe installed pressure tight; this pipe is installed with its one end inside the sleeve, while with another - outside the sleeve. The pipe ends are made with thread for cable points. The cable points CP-28 are screwed on the pipe ends. A logging cable is secured on the exterior surface of the pipe column. At the top the logging cable is connected with a secondary instrument, while at the bottom it is connected with the cable point CP-28 on the pipe outside the sleeve. Pressure tight cable points CP-28 are connected with a stub cable inside the pipe. On the pipe inside the sleeve the cable point CP-28 is connected with the stub cable of the logging cable, which below is connected with the subsurface instrument, located in the flow of liquid out of a lower bed.

EFFECT: upgraded reliability and efficiency of characterisation of lower bed at simultaneous-separate operation of beds in well.

1 dwg

Description

The invention relates to the oil industry and can be used in the operation of a well equipped for simultaneous and separate operation of two layers.

Known packer disconnecting installation for the operation of one or more layers of the well, including a pipe string lowered into the wellbore, equipped with at least one packer for separating one or more layers from the pipe cavity and the wellbore, and / or a borehole chamber with removable valves for the flow of the produced or injected medium, and / or a nipple, and / or a pump, and / or a filter, and / or a liner. In the nipple and / or in the borehole chambers, the removable valves are made in the form of a check or receiving valve and / or a downhole device for measuring the physical parameters of the medium flow (Publication number 2004101186, publ. 2005.06.20).

Placing a downhole tool in downhole chambers and / or landing nipples does not lead to reliable information about the lower formation.

The closest to the invention in technical essence is a well installation for simultaneous-separate and sequential operation of several formations in one well, including one or more pipe columns deflated and installed in the well. At least one pipe string is equipped with at least two devices — a packer and a disconnector. The installation has the ability, after lowering into the well and tightly landing in the pipe string, at least one packer, disconnect from the packer and remove from the well, then lowering and installing into the well pipe string larger, smaller, or equal diameter, without or with one , or with several of the devices - a packer, a disconnector, consisting of a removable and non-removable two parts, one or more downhole chambers with removable valves, a telescopic connection and a pump. In this case, the pipe string is lowered either directly into the well, or into a pipe string of a larger diameter and is not connected or is connected hermetically, but not rigidly, through a disconnector, with the corresponding packer. Moreover, the shoe of the pipe string below the packer installed above or below the lower layer is hydraulically disconnected or connected to the bottom of the well. In the borehole chambers and / or landing nipples above and / or below the packer, removable valves are installed in the form of a removable gas-lift starting and / or operating valve for pumping the working agent or bypassing the fluid through them during development and operation of the well, and / or in the form of a downhole device for measuring the parameters of the reservoir (RF Patent No. 2262586, publ. 2005.10.20 - prototype).

The use of an autonomous deep-well device makes it impossible to intervene in the operation of the lower layer, and the use of a remote device is impossible due to the unsolved problem of cable supply and sealing of the cable entry into the borehole chamber or nipple. In addition, the device, placed in the borehole chambers and / or landing nipples, is not able to determine the parameters of the lower layer with sufficient reliability.

The invention solves the problem of increasing the reliability and efficiency of determining the performance of the lower reservoir with simultaneous and separate operation of the reservoirs in the well.

The problem is solved in that the well device for simultaneous and separate operation of two layers, including a pipe string, a pump, a packer and a downhole device, according to the invention, further comprises a pipe communicating with the pipe string, the pipe is made with a side hole located above the packer and under the pump , a tube with one end inside the pipe and the other end outside the pipe is sealed in the side hole of the pipe, the ends of the pipe are threaded for cable lugs, the cable ends are screwed lugs, the geophysical cable is fixed on the outer surface of the pipe string, the geophysical cable is connected to the secondary device on the top, the cable lug on the tube on the outside of the pipe below, the sealed cable lugs inside the pipe are connected by a piece of geophysical cable, the cable lug on the tube inside the pipe is connected to a piece of geophysical cable, which is connected to the bottom of the deep device located in the fluid stream from the lower reservoir.

SUMMARY OF THE INVENTION

The main parameters necessary for regulating the operation of wells equipped with installations for simultaneous separate operation are production rate, water cut, bottomhole and reservoir pressure for each of the reservoirs in operation. In a single-lift installation, direct measurements of the lower reservoir parameters are measured only by self-contained instruments, which deprives the well operator of operational control and decision-making depending on the changing situation.

The invention solves the problem of increasing the reliability and efficiency of determining the performance of the lower reservoir with simultaneous and separate operation of the reservoirs in the well. The problem is solved by the device shown in the drawing.

The drawing shows a well device for simultaneous and separate operation of two layers.

The well device for simultaneous and separate operation of two layers includes a pipe string 1, pump 2, packer 3, a downhole tool 4, pipe 5 in communication with the pump 2 and pipe string 1. The pipe 5 is made with a side hole 6 located above the packer 3 and below pump 2. In the side hole 6 of the pipe 5, a tube 7 is sealed with one end inside the pipe 5 and with the other end outside the pipe 5. The ends of the pipe 7 are threaded (not shown). The cable ends of NK-28 8 and 9 are screwed to the ends of the tube 7. The geophysical cable 10 is fixed on the outer surface of the pipe string 1. At the top, the geophysical cable 10 is connected to the secondary device 11, from the bottom - to the cable lug NK-28 9 on the tube 7 outside the pipe 5 Cable lugs 8 and 9 inside the tube 7 are connected by a segment of the geophysical cable 12. Cable lug 8 on the tube 7 inside the nozzle 5 is connected to a segment of the geophysical cable 13, which is connected to the downhole device 4 from the bottom. The device is located in the hole 14, which opened the upper layer 15 and bottom layer 16.

The device is assembled as follows.

The downhole tool 4 is connected to a piece of geophysical cable 13. A geophysical cable 13 is connected to a cable lug 8 to which a piece of geophysical cable 12 is attached. A cable lug 8 is screwed onto a tube 7 with a piece of geophysical cable 12 placed inside the tube 7. To a piece of geophysical cable 12 attach the cable lug 9 and screw the latter onto the tube 7. Connect the cable lug 9 and the geophysical cable 10. A packer 3 is installed on the pipe 5 below the side hole 6. felling 5 with pump 2 and pipe 1, attach the geophysical cable 10 to the outer surface of the pipe 1. The assembled assembly is lowered into the well 14. The pipe string 1 is built up and the geophysical cable 10 is fixed on the outer surface of each pipe 1. At a given depth, install the pump 2, having the ability to draw fluid through the pipe string 1. Lower the pump plunger 2 and the rod string (not indicated) into the pipe string 1.

The device operates as follows.

When the packer 3 is unpackaged, pump 2 draws liquid from the upper 15 and lower layer 16. The total parameters of the lower 16 and upper layer 15 are continuously or periodically measured by a depth device 4. Information on the geophysical cable 13, through cable lug 8, length of geophysical cable 12, cable lug 9 and the geophysical cable 10 enters the secondary device 11 located on the day surface. Information is read and analyzed. The parameters of the upper layer 15 are measured by other instruments, for example, lowered along the annulus and placed opposite the upper layer 15. The parameters of the upper layer 15 are determined by the difference in the readings.

When the packer 3 is sealed, only the lower formation 16 information is read. When changing the parameters of the lower formation 16 or the upper formation 15, changes are made to the operation of the well 14, for example, the flow rate from the lower formation 16 is limited or intensified.

As the cable lug use a cable lug type NK-28 (TU 41-03-730-82, registration number 2302120 Design Bureau of Geophysical Instrumentation. Kiev. 1982).

To seal the tube 7 in the side hole 6 of the pipe 5, welding can be used, adhesives, sealants are used.

The use of a tight connection of the tube in the hole of the nozzle, cable lugs NK-28, a geophysical cable, placement of a downhole device in a fluid stream from the lower reservoir leads to an increase in the reliability and efficiency of determining the parameters of the lower reservoir during simultaneous and separate operation of the reservoirs in the well.

Claims (1)

The device of the well for simultaneous and separate operation of two layers, including a pipe string, pump, packer and a downhole device, characterized in that it further comprises a pipe in communication with the pipe string, which is made with a side opening located above the packer and under the pump, in the side a tube with one end inside the pipe and the other end outside the pipe is hermetically seated in the hole of the pipe, the ends of the pipe are threaded for cable lugs, the cable ends of NK-28 are screwed onto the ends of the pipe, geoph the cable is attached to the outer surface of the pipe string, the geophysical cable is connected to the secondary device on top, and the NK-28 cable lug on the tube on the outside of the pipe below, the NK-28 sealed cable lugs inside the tube are connected by a piece of geophysical cable, the NK-28 cable lug on the tube inside the pipe, it is connected to a segment of a geophysical cable, which is connected from below to a downhole tool located in a fluid stream from the lower layer.