CN209817999U - Device of compound coiled tubing running and fishing submersible oil electric pump - Google Patents

Abstract

The utility model is a device for a composite coiled tubing fishing submersible electric pump, which comprises an original well casing, on which a Christmas tree sits, a cable bridge plug is set and sealed on the inner wall of the original well casing, and below the cable bridge plug is a Safety valve, slanted guide shoe, safety valve forced opening tool, perforated pipe, motor, pump, hydraulic/electric bridge channel are installed above the cable bridge plug, and there is a Packer, downhole safety valve and composite coiled tubing are connected to the top of the hydraulic/electric bridge channel, the power cable in the composite coiled tubing is connected to the motor, the hydraulic control pipeline is connected to the downhole safety valve, and the top of the composite coiled tubing is connected to the coiled tubing As for the suspension device, there is a raised flange at the bottom of the Christmas tree, and the coiled tubing suspension device is set and sealed in the raised flange, and the coiled tubing suspension device is connected with a cable plug. The operation process includes a pre-order; a pumping process; a pumping process. The utility model can quickly check the pump without polluting the oil layer.

Description

A device for throwing and fishing submersible electric pump with composite coiled tubing

technical field

The utility model relates to the field of oil and gas exploitation in the petroleum industry, in particular to a device for a submersible electric pump for throwing and fishing composite coiled tubing.

Background technique

The existing electric submersible pump oil recovery technology usually utilizes oil pipes of more than nine meters each to transport the unit to the well. The oil pipes are connected with threads one by one, the lower part of the oil pipes is connected to the electric submersible pump unit, the power cable is fixed on the outer wall of the oil pipes and goes down with the oil pipes, and the unit lifts the formation fluid to flow through the inner cavity of the oil pipes to the ground.

When the unit fails or the power cable fails, before the oil pipe is lifted, it is necessary to use the well killing equipment to pump the well killing fluid into the wellbore to press the formation to prevent the formation fluid from flowing into the wellbore when the oil pipe is lifted, so as to avoid environmental protection, well kick or Blowout and other safety accidents; then the Christmas tree and wellhead blowout preventer need to be disassembled, and the oil pipes need to be pulled out one by one to replace the faulty unit or cable. This operation process takes a long time, costs high, pollutes the oil layer, and directly affects the output of the oil well after pump inspection. Therefore, it is necessary to find a pump inspection technology that can quickly inspect the pump without polluting the oil layer.

Contents of the invention

The utility model aims at solving the deficiencies of the prior art, and provides a device for throwing and fishing a submersible electric pump with a composite coiled tubing.

In order to achieve the above object, the utility model adopts the following technical solutions:

A device for a composite coiled tubing fishing submersible pump, comprising an original well casing, on which a Christmas tree is seated, a cable bridge plug is set and sealed on the inner wall of the original well casing, and a cable bridge plug is placed under the cable bridge plug. There is a slanted guide shoe, a safety valve is connected between the cable bridge plug and the slanted guide shoe, a tool string is provided above the cable bridge plug, and the tool string is provided with safety valves connected in sequence from bottom to top Forced opening tool, perforated pipe, motor, pump, hydraulic/electric bridge channel, a packer is provided between the hydraulic/electric bridge channel and the inner wall of the original well casing, and a suction port is provided on the pump, The liquid/electric bridge channel runs through a liquid outlet pipeline and an electric power pipeline. The liquid outlet of the liquid/electric bridge channel top liquid outlet is connected with a downhole safety valve. The power outlet of the pipeline is connected to the composite coiled tubing through the first connecting slip, and the power cable and the hydraulic control pipeline are prefabricated in the composite coiled tubing, and the power cable in the composite coiled tubing is connected to the motor through a small flat cable. The hydraulic control pipeline in the composite coiled tubing is connected with the downhole safety valve, the top of the composite coiled tubing is connected with a coiled tubing suspension device through the second connecting slip, the bottom of the Christmas tree is provided with a rising flange, and the coiled tubing suspension The device is set in the raised flange, the coiled tubing suspension device is connected with a cable plug, the hydraulic control pipeline in the composite coiled tubing is connected with the ground hydraulic control pipeline, and the original well casing is provided with a four-way device. The second connecting slip is set in the four-way device.

The size of the hydraulic control pipeline is 1/4 inch.

There are 1-2 hydraulic control pipelines.

The safety valve is a gate type safety valve.

The operation process of the device for the above-mentioned composite coiled tubing fishing submersible pump, the specific steps are:

S1. Preamble

After the casing of the original well is completed, sit on the Christmas tree;

S2, lower pump process

After removing the pressure cap of the oil tree, sit on the cable bridge plug: install a slanted guide shoe under the cable bridge plug, connect a ram-type safety valve between the slanted guide shoe and the cable bridge plug, and no longer connect the hydraulic control pipeline , according to the depth of the pump, determine the running depth of the cable bridge plug, and sit the cable bridge plug on the inner wall of the original well casing;

Connecting tool string: The tool string from bottom to top is forced opening tool for safety valve, perforated pipe, motor, pump, hydraulic/electrical bridge channel, and there is a packer outside the hydraulic/electrical bridge channel. The liquid outlet of the bridge channel is connected to the downhole safety valve;

Install the coiled tubing injector and blowout prevention combination, the composite coiled tubing is in place, the power cable and hydraulic control pipeline are prefabricated in the composite coiled tubing, the power outlet of the hydraulic/electric bridge channel is connected with the power cable in the composite coiled tubing, Then the composite coiled tubing and the hydraulic/electric bridge channel are connected together through the first connecting slip, the power cable is connected to the motor through a small flat cable, and the hydraulic control pipeline drawn from the composite coiled tubing passes through the packer from below Connected to the downhole safety valve;

Lowering the coiled tubing: After the tools are connected in series, the composite coiled tubing is lowered. When the safety valve at the bottom of the tool string is forced open and the tool opens the safety valve, calculate the length of the composite coiled tubing from the coiled tubing suspension to the rising flange of the Christmas tree. Fix the composite coiled tubing at the wellhead, cut off the composite coiled tubing, peel off the composite coiled tubing skin, connect the composite coiled tubing and the coiled tubing suspension device with the second connecting slip, and connect the power cable and the hydraulic control tube in the composite coiled tubing Connect the power cable and the hydraulic control pipeline on the coiled tubing suspension device respectively, sit on the coiled tubing suspension device to the raised flange, hoist the coiled tubing injection head, and install the Christmas tree pressure cap;

Connect the cable plug to the power cable jack in the coiled tubing hanger;

Connect the ground hydraulic control pipeline to the raised flange of the Christmas tree, pressurize and open the downhole safety valve;

After connecting the power cables and completing relevant inspections, start pump production;

S3, pump lifting process

Remove the oil tree pressure cap, coiled tubing blowout prevention combination, and put the injection head in place;

The coiled tubing fishing tool fishes the fishing head on the coiled tubing suspension device, lifts the coiled tubing suspension device to the position of the coiled tubing operation window on the drill floor, fixes the lower composite coiled tubing, removes the coiled tubing suspension device, and puts the composite coiled tubing and Composite coiled tubing at the surface is connected together;

Pull out the composite coiled tubing in the well until the first connecting slip outside the composite coiled tubing reaches the operation window of the drilling floor;

Fix the tool string in the well at the wellhead, disconnect the composite coiled tubing, hoist the coiled tubing injector, and then disassemble the tool string in the well.

The beneficial effects of the utility model are: the utility model uses the composite coiled tubing prefabricated with the power cable and the hydraulic control pipeline inside to transport the electric submersible pump unit to the predetermined well depth, and the power cable in the composite coiled tubing is connected to the motor of the unit. Realize power transmission, coupled with the packer and safety tools on the tool string, when the pump is started, the formation fluid flows from the annulus between the composite coiled tubing and the original well casing to the surface, realizing a new electric submersible pump production mode; when the unit or power cable in the well fails, it is only necessary to remove the pressure cap of the Christmas tree, install the wellhead system for the composite coiled tubing operation, and then use the composite coiled tubing to connect the coiled tubing suspension device in the well, and propose to rectify the composite coiled tubing in the well And the unit, replace the faulty parts, and go down to the well again, without cleaning and killing the well and removing the Christmas tree during the whole process.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of liquid/electric bridge channel;

In the figure: 1-slanted guide shoe; 2-safety valve; 3-cable bridge plug; 4-safety valve forced opening tool; 5-pipe with holes; 6-motor; 7-suction port; 8-small flat cable; 9-pump; 10-packer; 11-fluid/electric bridge channel; 12-first connecting slip; 13-hydraulic control pipeline; 14-downhole safety valve; 15-composite coiled tubing; 16-second Connecting slips; 17-cross device; 18-rising flange; 19-coiled tubing suspension device; 20-Christmas tree; 21-original well casing; 22-cable plug;

The following will be described in detail in conjunction with the embodiments of the present invention with reference to the accompanying drawings.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figures 1 to 2, a device for a composite coiled tubing electric submersible pump includes an original well casing 21, on which a Christmas tree 20 sits, and on the inner wall of the original well casing 21 A cable bridge plug 3 is set for sealing. A slanted guide shoe 1 is provided below the cable bridge plug 3. A safety valve 2 is connected between the cable bridge plug 3 and the slanted guide shoe 1. Above the cable bridge plug 3 A tool string is provided, and the tool string is provided with a safety valve forced opening tool 4, a perforated pipe 5, a motor 6, a pump 9, a liquid/electric bridge channel 11 connected in sequence from bottom to top, and the liquid/electric bridge A packer 10 is provided between the inner wall of the original well casing 21 and the original well casing 11, the pump 9 is provided with a suction port 7, and the liquid/electric bridge channel 11 is penetrated with a liquid outlet pipeline 23 and an electric power pipeline 24 The liquid outlet of the liquid outlet pipeline 23 at the top of the liquid/electric bridge channel 11 is connected with a downhole safety valve 14, and the power outlet of the power pipeline 24 at the top of the liquid/electric bridge channel 11 is connected through the first connecting slip 12. There is a composite coiled tubing 15, the composite coiled tubing 15 is prefabricated with a power cable and a hydraulic control pipeline 13, the power cable in the composite coiled tubing 15 is connected to the motor 6 through a small flat cable 8, and the composite coiled tubing 15 The hydraulic control pipeline 13 inside is connected with the downhole safety valve 14, the top of the composite coiled tubing 15 is connected with a coiled tubing suspension device 19 through the second connecting slip 16, and the bottom of the Christmas tree 20 is provided with a raised flange 18, the The coiled tubing suspension device 19 is set and sealed in the raised flange 18, the coiled tubing suspension device 19 is connected with a cable plug 22, the hydraulic control pipeline 13 in the composite coiled tubing 15 is connected with the ground hydraulic control pipeline, and the original casing The pipe 21 is provided with a four-way device 17 , and the second connecting slip 16 is set in the four-way device 17 .

The size of the hydraulic control pipeline 13 is 1/4 inch.

The number of said liquid control pipelines 13 is 1-2.

The safety valve 2 is a gate type safety valve.

The operation process of the device for the above-mentioned composite coiled tubing fishing submersible pump, the specific steps are:

S1. Preamble

After the original well casing 21 is completed, the Christmas tree 20 is seated;

S2, lower pump process

After removing the pressure cap of the christmas tree 20, sit on the cable bridge plug 3: install a slanted guide shoe 1 under the cable bridge plug 3, and connect a ram-type safety valve 2 between the slanted guide shoe 1 and the cable bridge plug 3, No longer connect the hydraulic control pipeline, determine the running depth of the cable bridge plug 3 according to the depth of the pump 9, and sit the cable bridge plug 3 on the inner wall of the original well casing 21;

Connecting tool string: The tool string from bottom to top is the safety valve forced opening tool 4, the perforated pipe 5, the motor 6, the pump 9, the hydraulic/electric bridge channel 11, and the hydraulic/electric bridge channel 11 is equipped with a seal device 10, connected to the downhole safety valve 14 on the liquid outlet of the liquid/electric bridge channel 11;

Install the coiled tubing injector and blowout prevention combination, the composite coiled tubing 15 is in place, the power cable and the hydraulic control pipeline 13 are prefabricated in the composite coiled tubing 15, the power outlet of the hydraulic/electric bridge channel 11 and the composite coiled tubing 15 The power cable is connected, and then the composite coiled tubing 15 and the hydraulic/electric bridge channel 11 are connected together through the first connecting slip 12, the power cable is connected with the motor 6 through the small flat cable 8, and the composite coiled tubing 15 is drawn out from the inside The hydraulic control pipeline 13 passes through the packer 10 from below and is connected to the downhole safety valve 14;

Lowering the coiled tubing: After the tools are connected in series, the composite coiled tubing 15 is lowered. When the safety valve at the bottom of the tool string is forced to open the tool 4 and the safety valve 2 is opened, calculate the composite continuous The value of the length of tubing 15 is to fix the composite coiled tubing 15 at the wellhead, cut off the composite coiled tubing 15, peel off the outer skin of the composite coiled tubing 15, and connect the composite coiled tubing 15 and the coiled tubing suspension device 19 with the second connecting slip 16, Connect the power cables and hydraulic control pipelines 13 in the composite coiled tubing 15 to the power cables and hydraulic control pipelines 13 on the coiled tubing suspension device 19 respectively, sit on the coiled tubing suspension device 19 into the raised flange 18, and hoist the continuous Tubing injection head, install the Christmas tree pressure cap;

Connect the cable plug 22 to the power cable jack in the coiled tubing suspension device 19;

Connect the ground hydraulic control pipeline on the raised flange 18 of the Christmas tree 20, pressurize and open the downhole safety valve 14;

After connecting the power cables and completing relevant inspections, start pump production;

S3, pump lifting process

Remove the oil tree pressure cap, coiled tubing blowout prevention combination, and put the injection head in place;

The coiled tubing fishing tool fishes the fishing head on the coiled tubing suspension device 19, lifts the coiled tubing suspension device 19 to the position of the coiled tubing operation window on the drill floor, fixes the lower composite coiled tubing 15, removes the coiled tubing suspension device 19, and removes the coiled tubing suspension device 19 in the well. The composite coiled tubing 15 and the composite coiled tubing 15 on the ground are connected together;

Pull out the composite coiled tubing 15 in the well until the first connecting slip 12 outside the composite coiled tubing 15 arrives at the drilling floor operation window;

Fix the tool string in the well at the wellhead, disconnect the composite coiled tubing 15, hoist the coiled tubing injector, and then disassemble the tool string in the well.

The utility model uses the composite coiled tubing 15 prefabricated with the power cable and the hydraulic control pipeline 13 inside to transport the electric submersible pump unit to the predetermined well depth, and the power cable in the composite coiled tubing 15 is connected with the motor 6 of the unit to realize power transmission. Coupled with the packer 10 and safety tool on the tool string, when the pump is started, the fluid produced in the formation flows from the annular space between the composite coiled tubing 15 and the original well casing 21 to the surface, realizing a new electric submersible pump production mode ; When the unit or power cable in the well fails, it is only necessary to remove the pressure cap of the Christmas tree, install the wellhead system for the composite coiled tubing 15 operation, connect the riser and the coiled tubing blowout preventer, release the pressure in the control pipeline, and unseal the seal in the well Then use the composite coiled tubing 15 to connect back to the coiled tubing suspension device 19 in the well, propose to rectify the composite coiled tubing 15 and the unit in the well, replace the faulty parts, and go down to the well again. Christmas tree 20 works.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as various improvements of the method concept and technical solutions of the utility model are adopted, or directly without improvement Those applied to other occasions are all within the protection scope of the present utility model.

Claims (3)

1. A device for pulling electric submersible pumps with composite coiled tubing, is characterized in that it comprises an original well casing (21), and an oil tree (20) is seated on the original well casing (21), and the original well casing (21) A cable bridge plug (3) is set on the inner wall, and a slanted guide shoe (1) is provided under the cable bridge plug (3), and the cable bridge plug (3) and the slanted guide shoe (1) A safety valve (2) is connected between them, and a tool string is provided above the cable bridge plug (3), and the tool string is provided with a safety valve forced opening tool (4), a perforated pipe ( 5), motor (6), pump (9), liquid/electric bridge channel (11), a packer is provided between the liquid/electric bridge channel (11) and the inner wall of the original well casing (21) (10), the pump (9) is provided with a suction port (7), the liquid/electric bridge channel (11) runs through a liquid outlet pipeline (23) and a power pipeline (24), and the liquid/ The liquid outlet of the liquid outlet pipeline (23) at the top of the electric bridge channel (11) is connected with a downhole safety valve (14), and the power outlet of the power pipeline (24) at the top of the liquid/electric bridge channel (11) passes through the first The connecting slips (12) are connected with composite coiled tubing (15), and power cables and hydraulic control pipelines (13) are prefabricated in the composite coiled tubing (15), and the power cables in the composite coiled tubing (15) pass through The small flat cable (8) is connected with the motor (6), the hydraulic control pipeline (13) in the composite coiled tubing (15) is connected with the downhole safety valve (14), and the top of the composite coiled tubing (15) passes through the The second connecting slip (16) is connected with a coiled tubing suspension device (19), and the bottom of the Christmas tree (20) is provided with a raised flange (18), and the coiled tubing suspension device (19) is set and sealed on the raised flange (18). Inside, the coiled tubing suspension device (19) is connected with a cable plug (22), the hydraulic control pipeline (13) in the composite coiled tubing (15) is connected with the surface hydraulic control pipeline, and the original well casing (21 ) is provided with a four-way device (17), and the second connecting slip (16) is set in the four-way device (17). 2. the device of a kind of composite coiled tubing fishing electric submersible pump according to claim 1, is characterized in that, the size of described hydraulic control line (13) is 1/4 inch. 3. The device for throwing and fishing electric submersible pumps with composite coiled tubing according to claim 2, characterized in that there are 1-2 hydraulic control pipelines (13).