CN104453859A - Well completing tester and system thereof - Google Patents

Abstract

The present invention proposes a well completion tester, which includes a first housing with a flow channel cavity formed inside; an isolation device arranged outside the first housing, and the isolation device is used to divide the downhole into an upper cavity and an upper cavity. The lower cavity; the driving device arranged in the flow channel cavity and the sliding rod connected with the driving device, the driving device drives the sliding rod to move axially; the testing device arranged in the first housing, the testing device is located below the sliding rod; A liquid inlet formed at the lower part of the first housing and communicated with both the flow channel cavity and the lower cavity, and a liquid outlet formed at the first housing above the isolation device and communicated with both the flow channel cavity and the upper cavity Liquid port; it can realize the connection or disconnection of the upper cavity and the lower cavity by controlling the axial movement of the sliding rod through the driving device, that is, to realize opening or closing the well; then use the testing device to record the dynamic change process of the downhole pressure, so that The well completion test is completed, and the test process is simple and easy to use; the invention also provides a well completion test system.

Description

Completion tester and its system

technical field

The invention relates to a well completion tester and a system thereof, belonging to the technical field of well completion testing.

Background technique

As we all know, well completion testing is the oil and gas flow testing work on favorable or possible oil and gas bearing formations after well completion. The existing completion testing technology at home and abroad generally adopts the completion testing technology of drill pipe or tubing, which is a testing technology that combines various testing tools according to the testing purpose and the physical properties of the testing interval.

At present, the string conveying type test tool is generally used in China. For example: Annulus Pressure Response (APR) test technology and Multi-Flow Evaluator (MFE) test technology. Both processes connect supporting tools through oil pipes or drill pipes, run them downhole, and control the downhole tools on the ground, so as to achieve the purpose of well completion testing.

Among them, the APR test technology is to realize the control of various supporting tools in the underground by suppressing the annular space on the ground. Specifically, the LPR-N valve achieves the inversion of its internal ball valve through the pressurization and pressure release of the annular space, and then realizes the control of downhole opening and closing; the RD or RDS valve realizes the pressure breaking of the rupture disc through the annular space pressurization The communication between the tubing and the ring sleeve is used to achieve the purpose of well control through circulation killing. During the test, the LPR-N valve and RD or RDS valve need to inject nitrogen, and the injection volume should be calculated according to the construction pressure level. Therefore make its testing process too complicated, not easy to use.

The MFE test technology realizes downhole tool control by raising and lowering the string. Specifically, by lifting and lowering the pipe string on the ground and applying drilling pressure, the downhole tool transposition mechanism is activated, the test valve is opened, and the downhole drilling is realized. After the test is completed, the pipe string is lifted up and lowered. Under the action of the transposition mechanism, the test valve is closed to realize downhole shut-in. During the test, the pipe string in the territory needs to be lifted or lowered through the hoisting system, so it needs to be carried out with the cooperation of downhole operations. Therefore make its testing process too complicated, not easy to use.

To sum up, in the existing well completion testing devices, there are common problems that the testing process is complicated and inconvenient to use.

Contents of the invention

In view of the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a well completion tester whose testing process is simple and easy to use.

The purpose of the present invention is also to provide a well completion testing system, the testing process of which is simple and easy to use.

A well completion tester provided by the present invention includes:

A first housing with a flow channel cavity formed inside;

an isolation device for setting arranged outside the first casing, and the isolation device is used to divide the downhole into an upper cavity and a lower cavity;

a driving device arranged in the flow channel cavity and a sliding rod connected with the driving device, the driving device drives the sliding rod to move axially;

a test device arranged in the first housing, the test device is located below the slide bar;

a liquid inlet formed at the lower part of the first casing and communicating with both the flow channel cavity and the lower cavity, and a liquid inlet formed at the top of the first casing and located above the sealing device a liquid outlet communicating with both the flow channel cavity and the upper cavity;

Wherein, the sliding rod can move upwards driven by the driving device to open the liquid outlet, thereby connecting the upper cavity and the lower cavity through the flow channel cavity;

The slide bar can move downwards driven by the driving device to close the liquid outlet, thereby disconnecting the communication between the upper cavity and the lower cavity.

Optionally, the drive device includes a first separation layer formed by extending the inner wall of the first housing to the axis, and the inner wall of the first housing that is located below the first separation layer in the axial direction A second separation layer formed by extending toward the axis, and a test piston arranged axially between the first separation layer and the second separation layer, and the top of the test piston and the first separation layer A first cavity is formed between them, and a second cavity is formed between the bottom of the test piston and the second separation layer;

The top of the slide rod is connected to the bottom of the test piston, and the slide rod passes through the second separation layer axially downwards and extends into the flow channel cavity;

Wherein, when the pressure in the second cavity is greater than the pressure in the first cavity, the test piston moves upwards, so that the slide bar opens the liquid outlet;

When the pressure in the second cavity is lower than the pressure in the first cavity, the test piston moves downwards, so that the sliding rod closes the liquid outlet.

Optionally, the containment device includes,

A cone, a packing rubber sleeve and a sliding outer casing are sequentially arranged axially downward on the outer wall of the first housing, the cone is fixedly connected to the first housing, the packing rubber sleeve and The sliding sleeves are all socketed and slidably fitted with the first housing, the bottom of the cone is engaged with the top of the sealing rubber tube, and the bottom of the sealing rubber sleeve is connected to the top of the sliding sleeve. snap on top;

The outer wall of the first housing is formed with a guide groove, and the inner wall of the sliding sleeve extends toward the axis to form a guide protrusion that matches the guide groove, and the guide protrusion separates the guide groove and forms a the third cavity and the fourth cavity;

Wherein, when the pressure in the fourth cavity is greater than the pressure in the third cavity, the sliding jacket moves upward, and the cone cooperates with the sliding jacket to squeeze the sealing rubber tube, so that The sealing rubber cylinder is opened outward to realize setting seal;

When the pressure in the fourth cavity is lower than the pressure in the third cavity, the sliding jacket moves downward, so that the sealing rubber tube shrinks inwardly to realize unsealing.

Optionally, the containment device includes,

at least three flukes arranged on the outer wall of the first housing, the upper ends of the flukes are affixed to the outer wall of the first housing, and the lower ends of the flukes are connected to the outer wall of the first housing A gap is formed between the outer walls;

Slidingly fit the cone, the sealing rubber sleeve and the sliding outer sleeve on the outer wall of the first housing in sequence downwards in the axial direction, the bottom of the cone is engaged with the top of the sealing rubber sleeve, The bottom of the sealing rubber tube is engaged with the top of the sliding jacket;

The outer wall of the first housing is formed with a guide groove, and the inner wall of the sliding sleeve extends toward the axis to form a guide protrusion that matches the guide groove, and the guide protrusion separates the guide groove and forms a the third cavity and the fourth cavity;

Wherein, when the pressure in the fourth cavity is greater than the pressure in the third cavity, the sliding sleeve moves upward, so that the cone moves upward and inserts into the gap, and the fluke moves outward. Opening; the cone cooperates with the sliding outer sleeve to squeeze the sealing rubber tube, so that the sealing rubber tube is opened outward to realize setting seal;

When the pressure in the fourth cavity is lower than the pressure in the third cavity, the sliding sleeve moves downward, so that the sealing rubber tube shrinks inward to realize unsealing, so that the cone moves downward out of the gap, and the fluke shrinks inwardly.

Optionally, the number of the flukes is six, and the six flukes are evenly distributed on the outer wall of the first housing in a ring around the axis.

Optionally, the first housing is provided with a first wire-passing pipe that sequentially passes through the first separation layer, the test piston, and the slide rod, and the bottom of the first wire-passing pipe is in contact with the The test device is connected.

A well completion test system provided by the present invention includes an auxiliary controller and the above-mentioned well completion tester;

The auxiliary controller includes a second housing with an installation cavity, and a control circuit device and a hydraulic oil tank arranged axially downward in the second housing;

Wherein, the lower end of the second casing is connected to the upper end of the first casing, the control circuit device is connected to the testing device, and the hydraulic oil tank is connected to the first cavity, the second The cavity, the third cavity and the fourth cavity are connected.

Optionally, a pressure balance device is further arranged in the second housing axially between the control circuit device and the hydraulic oil tank;

The pressure equalization device includes,

a third separation layer formed by extending the inner wall of the second casing toward the axis, a fourth separation layer axially located below the first separation layer and formed by extending the inner wall of the second casing toward the axis, and a balance piston axially disposed between the third separation layer and the fourth separation layer;

A fifth cavity is formed between the top of the balance piston and the third separation layer, and a sixth cavity is formed between the bottom of the balance piston and the fourth separation layer;

A through hole communicating with both the fifth cavity and the upper cavity is formed on the second housing, and the sixth cavity is connected with the hydraulic oil tank.

Optionally, a second wire-passing pipe that passes through the third separation layer, the balance piston, the fourth separation layer and the hydraulic oil tank in sequence is arranged in the second housing along the axial direction, and the The upper end of the second wire passing pipe is connected with the control circuit device, and the lower end of the second wire passing pipe is connected with the first wire passing pipe.

Optionally, the auxiliary controller is also provided with a positioning device for measuring the setting depth.

Compared with the prior art, the well completion tester provided by the present invention can realize the connection or disconnection of the upper cavity and the lower cavity by controlling the axial movement of the sliding rod through the driving device, that is, to realize opening or shutting the well ; Then use the test device to record the dynamic change process of the downhole pressure, so as to complete the well completion test. The test process is simple and easy to use.

In a further technical solution, the driving device adopts a piston structure. By changing the pressure on the top and bottom of the test piston, the control of the test piston is realized and the sliding rod is driven to move in the axial direction, which further simplifies the test process and is more convenient to use.

In a further technical solution, the sealing device adopts a piston structure, and by changing the pressure in the third cavity and the fourth cavity formed by the sliding outer casing and the outer wall of the first shell, the sliding outer casing drives the sealing rubber cylinder to move, The sealing and unsealing are realized through the sealing rubber tube, which is more convenient to operate and use, and further optimizes the testing process.

In a further technical solution, the isolation device adopts a piston structure, and by changing the pressure of the third cavity and the fourth cavity formed by the sliding outer casing and the outer wall of the first shell, the sliding outer casing drives the sealing rubber cylinder, the cone The body and the anchor fluke move, and the sealing and unsealing are realized through the packing rubber tube, and the anchoring through the anchor fluke can effectively prevent the completion tester from running up; at the same time, it is more convenient to operate and use, and further optimizes the testing process.

In a further technical solution, the number of flukes is six, and they are uniformly distributed in a ring on the outer wall of the first shell, thereby effectively improving the anchoring performance of the flukes and providing sufficient anchoring for the completion tester Force to prevent it from jumping up.

In a further technical solution, the first casing is provided with a first wire-passing tube for placing cables used for data transmission and control, and the first cable-passing tube can protect the cables.

Compared with the prior art, the well completion test system provided by the present invention can realize the connection or disconnection of the upper cavity and the lower cavity by controlling the axial movement of the sliding rod through the driving device, that is, to realize opening or shutting the well ; Then use the test device to record the dynamic change process of the downhole pressure, so as to complete the well completion test. The test process is simple and easy to use.

In a further technical solution, a pressure balance device is provided in the second housing to balance the pressure inside the second housing and the pressure between the upper cavity, thereby effectively avoiding the pressure on the first cavity due to excessive pressure in the upper cavity. Two shells cause damage.

In a further technical solution, a second cable conduit is provided in the second casing for placing cables for transmitting data and control, and is connected to the first cable conduit, and the second cable conduit can be used to protect the cables. to the protective effect.

In a further technical solution, a positioning device is provided on the auxiliary controller, and the setting depth is determined by the positioning device, while preventing the completion tester from setting at the position of the casing collar.

The above technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

Description of drawings

In the following the invention will be described in more detail based on purely non-limiting examples and with reference to the accompanying drawings. in:

Fig. 1 is a schematic structural diagram of the well opening working state of the well completion tester provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of the shut-in working state of the well completion tester provided by Embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of a well completion tester provided in Embodiment 2 of the present invention;

Fig. 4 is a schematic structural diagram of a well completion testing system provided by Embodiment 3 of the present invention.

Description of drawings:

1-first housing, 11-runner cavity, 12-liquid inlet, 13-liquid outlet, 14-guide groove, 15-first wire-passing pipe;

2-packing device, 21-anchor fluke, 22-cone, 23-packing rubber tube,

24-sliding jacket, 241-guide protrusion,

25-the third cavity, 26-the fourth cavity;

3-upper cavity; 4-lower cavity;

5-driving device, 51-first separation layer, 52-second separation layer, 53-test piston, 54-first cavity, 55-second cavity;

6-sliding bar; 7-test device;

8-the second housing, 81-through hole, 82-the second wire-passing pipe;

9-control circuit device, 91-hydraulic oil tank;

10—pressure balance device, 101—third separation layer, 102—fourth separation layer, 103—balance piston, 104—fifth chamber, 105—sixth chamber.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below. All other implementations obtained below fall within the protection scope of the present invention.

Before describing the specific implementation, the directional names appearing in the present invention are defined as follows:

The axis of the completion tester is the drilling axis; the part close to the ground is the upper part, and the part far away from the ground is the lower part; the direction close to the ground is the upper part, and the direction away from the ground is the lower part; One end is the bottom; the side close to the axis is the inner side, and the side away from the axis is the outer side.

Embodiment one:

As shown in Figures 1 and 2, the completion tester provided in this embodiment includes: a first housing 1 with a flow channel cavity 11 formed inside; The isolation device 2, and the isolation device 2 is used to divide the downhole into an upper cavity 3 and a lower cavity 4; the driving device 5 arranged in the flow channel cavity 11 and the slide rod 6 connected with the driving device 5, The driving device 5 drives the slide rod 6 to move axially; the test device 7 is arranged in the first housing 1, and the test device 7 is located below the slide rod 6; it is formed on the lower part of the first housing 1 and is connected with the flow channel cavity 11 and the liquid inlet 12 connected to the lower cavity 4, and the liquid outlet 13 formed on the first shell 1 above the isolation device 2 and communicated with the flow channel cavity 11 and the upper cavity 3; Wherein, the slide bar 6 can move upwards under the drive of the driving device 5 to open the liquid outlet 13, thereby connecting the upper cavity 3 and the lower cavity 4 through the flow channel cavity 11; Driven by 5, it moves downward to close the liquid outlet 13, thereby disconnecting the communication between the upper cavity 3 and the lower cavity 4.

For ease of understanding, the working process of the completion tester is described below:

As shown in Figure 1, when performing a well completion test, the completion tester is lowered downhole as a whole, at this time, the slide rod 6 closes the liquid outlet 13, and the oil and gas flow in the lower cavity 4 enters through the liquid inlet 12. Inside the channel cavity 11.

When the completion tester is lowered to the testing depth, the isolation device 2 is controlled to open, so that the isolation device 2 adheres to the well wall and divides the downhole into an upper cavity 3 and a lower cavity 4, thereby realizing setting.

After the setting is completed, as shown in Figure 2, the drive device 5 is used to drive the slide bar 6 to move upwards, so that the liquid outlet 13 is opened, and at the same time, the oil and gas flow in the lower cavity 4 passes through the liquid outlet 13 and flows out of the flow channel cavity 11. Into the upper cavity 3, the test device 7 is tested, so as to realize the well opening and completion test.

When the well completion test is over, as shown in Figure 1, the drive device 5 drives the slide bar 6 to move downward, so that the liquid outlet 13 is closed, and at the same time, the connection between the lower cavity 4 and the upper cavity 3 is disconnected, thereby realizing Shut the well.

Finally, the isolation device 2 is controlled to be closed, so that the isolation device 2 is separated from the well wall, thereby achieving unsealing.

In the well completion tester provided in this embodiment, the connection or disconnection between the upper cavity 3 and the lower cavity 4 can be realized by controlling the sliding rod 6 to move in the axial direction through the driving device 5, that is, opening or closing the well; Then, the test device 7 is used to record the dynamic change process of the downhole pressure, so as to complete the completion test. The test process is simple and easy to use.

Embodiment two:

As shown in FIG. 3 , the completion tester provided in this embodiment includes: a first shell 1 with a flow channel cavity 11 formed inside; a packing for setting outside the first shell 1 device 2, and the isolation device 2 is used to divide the downhole into an upper cavity 3 and a lower cavity 4 (the dotted line in the figure indicates that the isolation device 2 is in an open state and is attached to the well wall); it is set in The drive device 5 in the runner cavity 11 and the slide rod 6 connected to the drive device 5, the drive device 5 drives the slide rod 6 to move axially; the test device 7 arranged in the first housing 1, the test device 7 is located Below the slide bar 6; the lower part of the first casing 1 is formed with a liquid inlet 12 communicating with the flow channel cavity 11 and the lower cavity 4, and the first casing 1 is located above the isolation device 2 and formed with a The liquid outlet 13 that both the channel cavity 11 and the upper cavity 3 communicate with.

Wherein, the driving device 5 includes: a first separation layer 51 formed by extending the inner wall of the first housing 1 toward the axis; The second separation layer 52, and the test piston 53 axially arranged between the first separation layer 51 and the second separation layer 52, and a first cavity is formed between the top of the test piston 53 and the first separation layer 51 54 , a second cavity 55 is formed between the bottom of the test piston 53 and the second separation layer 52 .

The top of the further slide rod 6 is connected to the bottom of the test piston 53 , and the slide rod 6 passes through the second separation layer 52 axially downwards and extends into the flow channel cavity 11 .

Wherein, when the pressure in the second cavity 55 is greater than the pressure in the first cavity 54, the test piston 53 moves upward, so that the slide rod 6 opens the liquid outlet 13, and the upper cavity is opened by the flow channel cavity 11. 3 communicates with the lower cavity 4; when the pressure in the second cavity 55 is lower than the pressure in the first cavity 54, the test piston 53 moves downward, so that the slide rod 6 closes the liquid outlet 13 and the The communication between the upper cavity 3 and the lower cavity 4 is disconnected.

For ease of understanding, the working process of the completion tester is described below:

When performing the completion test, the completion tester is lowered downhole as a whole, at this time, the slide rod 6 closes the liquid outlet 13, and the oil and gas flow in the lower cavity 4 enters the flow channel cavity 11 through the liquid inlet 12 .

When the completion tester is lowered to the testing depth, the isolation device 2 is controlled to open, so that the isolation device 2 adheres to the well wall and divides the downhole into an upper cavity 3 and a lower cavity 4, thereby realizing setting.

After the setting is completed, the pressure in the second cavity 55 is greater than the pressure in the first cavity 54 by injecting hydraulic fluid into the second cavity 55, so that the test piston 53 moves upward and drives the slide rod 6 to move upward , so that the liquid outlet 13 is opened, and at the same time, the oil and gas flow in the lower cavity 4 enters the upper cavity 3 from the flow channel cavity 11 through the liquid outlet 13, and the testing device 7 performs a test, thereby realizing opening and completing the well. Well test.

When the well completion test is over, the pressure in the second cavity 55 is lower than the pressure in the first cavity 54 by injecting hydraulic fluid into the first cavity 54, so that the test piston 53 moves downward and drives the slide rod 6 moves downward, so that the liquid outlet 13 is closed, and at the same time, the connection between the lower cavity 4 and the upper cavity 3 is disconnected, so that the well is shut in.

Finally, the isolation device 2 is controlled to be closed, so that the isolation device 2 is separated from the well wall, thereby achieving unsealing.

In the well completion tester provided in this embodiment, the driving device 5 adopts a piston structure. By changing the pressure on the top and bottom of the test piston 53, the control of the test piston 53 is realized, and then the slide rod 6 is driven to move in the axial direction and realize The connection or disconnection of the upper cavity 3 and the lower cavity 4 realizes opening or closing the well; then the test device 7 is used to record the dynamic change process of the downhole pressure to complete the well completion test. The test process is simple and easy to use.

In this embodiment, since the isolation device 2 needs to isolate the test formation during the well completion test, that is, the downhole is divided into an upper cavity 3 and a lower cavity 4 by the isolation device 2, so the isolation device 2 Reliability is paramount. To this end, this embodiment provides two specific implementations of packaging devices.

In the first embodiment, when the isolation device 2 isolates the downhole, the isolation device 2 will be subjected to a large downhole pressure. If the pressure is too high, the completion tester will move upward as a whole, thereby causing damage to the isolation device. The damage of 2 may cause the cable in the completion tester to be coiled, stuck, entangled or even broken. Therefore, an anchoring component should be added to the isolation device 2.

To this end, as shown in FIG. 3 , the isolation device 2 includes at least three flukes 21 arranged on the outer wall of the first shell 1, the upper ends of the flukes 21 are affixed to the outer wall of the first shell 1, and the anchors A gap is formed between the lower end of the claw 21 and the outer wall of the first housing 1; the cone 22, the sealing rubber tube 23 and the sliding outer sleeve which are sleeved on the outer wall of the first housing 1 are sequentially slid and fitted axially downward. 24. The bottom of the cone 22 is clamped with the top of the sealing rubber tube 23, and the bottom of the sealing rubber tube 23 is clamped with the top of the sliding jacket 24; the outer wall of the first shell 1 is formed with a guide groove 14, and the sliding jacket 24 The inner wall of the inner wall extends toward the axis to form a guide protrusion 241 that matches the guide groove, and the guide protrusion 241 separates the guide groove 14 and forms a third cavity 25 and a fourth cavity 26; wherein, when the fourth cavity 26 When the pressure inside is greater than the pressure in the third cavity 25, the sliding jacket 24 moves upward, so that the cone 22 moves up and is inserted into the gap, and the fluke 21 is opened outward; the cone 22 is matched with the sliding jacket 24 to squeeze Press the sealing rubber tube 23, so that the sealing rubber tube 23 is opened to the outside to realize setting; when the pressure in the fourth cavity 26 is lower than the pressure in the third cavity, the sliding jacket 24 moves downward, so that the sealing rubber tube 23 shrinks inwardly to realize unsealing, so that the cone 22 moves down out of the gap, and the fluke 21 shrinks inwardly.

It should be noted that the length of the socket between the upper and lower parts of the sliding jacket 24 and the first housing 1 should be long enough, that is, when the sliding jacket 24 moves upwards or downwards, the sliding jacket 24 will not slide from the first casing. 1, so as to ensure that the third cavity 25 and the fourth cavity 26 will not communicate with the lower cavity 4.

In use, when the completion tester is lowered into place, hydraulic fluid is injected into the fourth cavity 26, so that the pressure in the fourth cavity 26 is greater than the pressure in the third cavity 25, so that the sliding outer casing 24 moves upward And drive the sealing rubber tube 23 and the cone 22 to move upward together. When the cone 22 is inserted into the gap formed between the lower end of the fluke 21 and the outer wall of the first shell 1, the cone 22 pushes the lower end of the fluke 21 upward to The outer side is opened to realize anchoring; when the fluke 21 is opened to a certain extent to the outside (that is, the anchoring is completed when the fluke 21 is attached to and abuts against the downhole wall), the cone 22 will no longer move upward. The sliding jacket 24 continues to move upwards and cooperates with the cone 22 to compress the sealing rubber cylinder 23, so that the sealing rubber cylinder 23 is opened outward, thereby realizing setting.

When the completion test is over, the pressure in the fourth cavity 26 is lower than the pressure in the third cavity 25 by injecting hydraulic fluid into the third cavity 25, so that the sliding jacket 24 moves downward and drives the sealing The rubber tube 23 and the cone 22 move downward together. At this time, the sealing rubber tube 23 shrinks inward to realize unsealing, and at the same time the cone 22 moves down out of the gap, and the anchor fluke 21 shrinks inward to release the anchor.

The isolation device 2 adopts a piston structure, and by changing the pressure of the third cavity 25 and the fourth cavity 26 formed by the sliding outer casing 24 and the outer wall of the first shell 1, the sliding outer casing 24 drives the sealing rubber cylinder 23, the cone Body 22 and anchor fluke 21 move, and the sealing and unsealing are realized through the sealing rubber tube 23, and the anchoring through the anchor fluke 21 can also effectively prevent the completion tester from running up; at the same time, it is more convenient to operate and use, and further Optimized the testing process.

In this embodiment, the number of further flukes 21 is six, and the six flukes 21 are evenly distributed on the outer wall of the first housing 1 in a ring around the axis. Adopting this design can effectively improve the anchoring performance of the anchor fluke 21, thereby providing sufficient anchoring force for the completion tester and preventing it from jumping up.

In the second embodiment, when the isolation device 2 isolates the downhole, when the downhole pressure is relatively small, no anchoring component is needed.

It should be noted that the general structure of the isolation device 2 provided in this embodiment is similar to that of the isolation device 2 provided in the first embodiment, so reference can be made to the isolation device 2 shown in FIG. 3 .

The isolation device 2 includes a cone 22, an isolation rubber sleeve 23 and a sliding sleeve 24 arranged axially downward on the outer wall of the first shell 1, the cone 22 is fixedly connected to the first shell 1, and the seal The isolation rubber tube 23 and the sliding outer sleeve 24 are both sleeved and slidably fitted with the first housing 1, the bottom of the cone 22 is engaged with the top of the isolation rubber sleeve 23, and the bottom of the isolation rubber sleeve 23 is connected to the sliding outer sleeve 24. The outer wall of the first housing 1 is formed with a guide groove 14, and the inner wall of the sliding sleeve 24 extends toward the axis to form a guide protrusion 241 that matches the guide groove, and the guide protrusion 241 separates the guide groove 14 and A third cavity 25 and a fourth cavity 26 are formed; wherein, when the pressure in the fourth cavity 26 is greater than the pressure in the third cavity 25, the sliding jacket 24 moves upward, and the cone 22 cooperates with the sliding jacket 24 Squeeze the sealing rubber tube 23, so that the sealing rubber tube 23 is opened to the outside to realize setting; when the pressure in the fourth cavity 26 is lower than the pressure in the third cavity, the sliding jacket 24 moves downward, so that the sealing rubber The barrel 23 shrinks inwardly to realize unsealing.

It should be noted that the length of the socket between the upper and lower parts of the sliding jacket 24 and the first housing 1 should be long enough, that is, when the sliding jacket 24 moves upwards or downwards, the sliding jacket 24 will not slide from the first casing. 1, so as to ensure that the third cavity 25 and the fourth cavity 26 will not communicate with the lower cavity 4.

In use, when the completion tester is lowered into place, hydraulic fluid is injected into the fourth cavity 26, so that the pressure in the fourth cavity 26 is greater than the pressure in the third cavity 25, so that the sliding outer casing 24 moves upward And drive the sealing rubber tube 23 to move upward together and cooperate with the cone 22 to compress the sealing rubber tube 23, so that the sealing rubber tube 23 opens outward, thereby realizing setting.

When the completion test is over, the pressure in the fourth cavity 26 is lower than the pressure in the third cavity 25 by injecting hydraulic fluid into the third cavity 25, so that the sliding jacket 24 moves downward and drives the sealing The rubber tube 23 moves downward together, and at this time, the sealing rubber tube 23 shrinks inward to realize unsealing.

The isolation device 2 adopts a piston structure, and by changing the pressure of the third cavity 25 and the fourth cavity 26 formed by the sliding outer casing 24 and the outer wall of the first housing 1, the sliding outer casing 24 drives the sealing rubber cylinder 23 to move, And the sealing and unsealing are realized through the sealing rubber tube 23, which is more convenient to operate and use, and further optimizes the testing process.

In this embodiment, since the completion tester needs to transmit data with the ground, and the electronic control components in the completion tester need to transmit control signals from the ground, the completion tester is provided with wires for data transmission and control. cable. However, during the testing process, downhole oil and gas flows through the first housing 1. Therefore, in order to ensure the safety and reliability of the cable, the first housing 1 is provided with the first separation layer 51, the test piston 53 and the slide. The first wire passing pipe 15 of the rod 6 , and the bottom of the first wire passing pipe 15 is connected with the testing device 7 . It utilizes the first cable conduit 15 to place cables for data transmission and control, which can effectively protect the cables.

Embodiment three:

As shown in Figure 4, a well completion testing system is provided in this embodiment, including an auxiliary controller and the completion tester described in the second embodiment above; the auxiliary controller includes a second housing 8 with a mounting cavity , and the control circuit device 9 and the hydraulic oil tank 91 arranged in the second housing 8 in sequence along the axial direction; wherein, the lower end of the second housing 8 is connected to the upper end of the first housing 1, and the control circuit device 9 is connected to the upper end of the first housing 1. The testing device 7 is connected, and the hydraulic oil tank 91 is connected with the first cavity 54 , the second cavity 55 , the third cavity 25 and the fourth cavity 26 respectively.

The specific working process and beneficial effects of the well completion tester in the well completion test system provided in this embodiment have been fully described in Embodiment 2, and will not be described again.

The control circuit device 9 in the auxiliary controller is used to receive the test data in the test device 7, and is used to control the hydraulic oil tank 91 to control the first cavity 54, the second cavity 55, the third cavity 25 and the fourth cavity respectively. The body 26 performs injection and recovery of hydraulic fluid. Specifically, when the hydraulic oil tank 91 injects hydraulic fluid into the second cavity 55, the test piston 53 moves up and squeezes the first cavity 54, and the hydraulic fluid in the first cavity 54 flows back into the hydraulic oil tank 91, when When the hydraulic oil tank 91 injects hydraulic fluid into the first cavity 54, the test piston 53 moves down and squeezes the second cavity 55, and the hydraulic fluid in the second cavity 55 flows back into the hydraulic oil tank 91; When the hydraulic fluid is injected into the fourth cavity 26, the sliding jacket 24 moves up and squeezes the third cavity 25, the hydraulic fluid in the third cavity 25 flows back into the hydraulic oil tank 91, and when the hydraulic oil tank 91 flows into the third cavity When hydraulic fluid is injected into 25 , the sliding jacket 24 moves down and squeezes the fourth cavity 26 , and the hydraulic fluid in the fourth cavity 26 flows back into the hydraulic oil tank 91 .

In the well completion test system provided in this embodiment, the connection or disconnection between the upper cavity 3 and the lower cavity 4 can be realized by controlling the sliding rod 6 to move in the axial direction through the driving device 5, that is, opening or closing the well; Then, the test device 7 is used to record the dynamic change process of the downhole pressure, so as to complete the completion test. The test process is simple and easy to use.

In this embodiment, when the second casing 8 goes deep into the well, the downhole pressure will cause greater pressure on the second casing 8 , in order to avoid damage to the second casing 8 caused by the downhole pressure.

A pressure balance device 10 can also be arranged axially between the control circuit device 9 and the hydraulic oil tank 91 in the second housing 8; The separation layer 101, the fourth separation layer 102 axially located below the first separation layer 51 is formed by extending the inner wall of the second housing 8 to the axis, and the third separation layer 101 and the fourth separation layer are arranged axially A balance piston 103 between 102; a fifth cavity 104 is formed between the top of the balance piston 103 and the third separation layer 101, and a sixth cavity 105 is formed between the bottom of the balance piston 103 and the fourth separation layer 102; A through hole 81 communicating with both the fifth cavity 104 and the upper cavity 3 is formed on the second housing 8 , and the sixth cavity 105 is connected with the hydraulic oil tank 91 .

When in use, when the completion test system goes deep downhole, the oil flow in the upper cavity 3 is introduced into the fifth cavity 104 through the through hole 81, and hydraulic fluid is injected into the sixth cavity 105 through the hydraulic oil tank 91 at the same time, Therefore, the pressure of the hydraulic fluid in the sixth cavity 105 is used to balance the pressure in the fifth cavity 104, thereby balancing the pressure inside the second housing 8 and the pressure between the upper cavity 3, thereby effectively avoiding the pressure caused by the upper cavity. The pressure inside the body 3 is too high to cause damage to the second housing 8 .

In this embodiment, since the auxiliary controller needs to perform data transmission with the completion tester, and the electronic control components in the completion tester need to transmit control signals from the ground, the auxiliary controller may be equipped with data transmission and control cables. However, during the test, there is downhole oil and gas flow passing through the second casing 8, so in order to ensure the safety and reliability of the cable, the second casing 8 is provided with the third separation layer 101 and the balance piston along the axial direction. 103, the fourth separation layer 102 and the second wire-passing pipe 82 of the hydraulic oil tank 91, and the upper end of the second wire-passing pipe 82 is connected to the control circuit device 9, and the lower end of the second wire-passing pipe 82 is connected to the first wire-passing pipe 15 connected. It utilizes the second cable conduit 82 to place the cables used for data transmission and control, which can effectively protect the cables.

In this embodiment, during the lowering of the completion test system, if the setting position of the isolation device 2 is just at the position of the collar of the downhole casing, the isolation will not be tight, and the completion test cannot be carried out normally. . For this reason, a positioning device for measuring the setting depth can also be provided on the auxiliary controller. Specifically, the positioning device can adopt a magnetic positioning device, and the setting position of the completion test system is determined by the magnetic positioning device during the lowering process, thereby effectively avoiding the setting of the packing device 2 at the casing collar, and further Effectively guarantee the completion test.

Finally, it should be noted that: the above embodiments and examples are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments and examples, those of ordinary skill in the art It should be understood that it is still possible to modify the technical solutions described in the foregoing embodiments or examples, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the embodiments of the present invention. Or the spirit and scope of the technical solutions of the embodiments.

Claims (10)

1. A completion tester comprising: A first housing with a flow channel cavity formed inside; an isolation device for setting arranged outside the first casing, and the isolation device is used to divide the downhole into an upper cavity and a lower cavity; a driving device arranged in the flow channel cavity and a sliding rod connected with the driving device, the driving device drives the sliding rod to move axially; a test device arranged in the first housing, the test device is located below the slide bar; a liquid inlet formed at the lower part of the first casing and communicating with both the flow channel cavity and the lower cavity, and a liquid inlet formed at the top of the first casing and located above the sealing device a liquid outlet communicating with both the flow channel cavity and the upper cavity; Wherein, the sliding rod can move upwards driven by the driving device to open the liquid outlet, thereby connecting the upper cavity and the lower cavity through the flow channel cavity; The slide bar can move downwards driven by the driving device to close the liquid outlet, thereby disconnecting the communication between the upper cavity and the lower cavity. 2. The completion tester according to claim 1, wherein the driving device comprises a first separation layer formed by extending the inner wall of the first housing to the axis, and is located axially on the first separation layer. a second separation layer formed by extending the inner wall of the first housing to the axis under a separation layer, and a test piston axially disposed between the first separation layer and the second separation layer, and A first cavity is formed between the top of the test piston and the first separation layer, and a second cavity is formed between the bottom of the test piston and the second separation layer; The top of the slide rod is connected to the bottom of the test piston, and the slide rod passes through the second separation layer axially downwards and extends into the flow channel cavity; Wherein, when the pressure in the second cavity is greater than the pressure in the first cavity, the test piston moves upwards, so that the slide bar opens the liquid outlet; When the pressure in the second cavity is lower than the pressure in the first cavity, the test piston moves downwards, so that the sliding rod closes the liquid outlet. 3. The well completion tester according to claim 1 or 2, characterized in that, the isolation device comprises a cone, an isolation device arranged axially downward on the outer wall of the first housing The rubber sleeve and the sliding sleeve, the cone is fixedly connected to the first housing, the sealing rubber sleeve and the sliding sleeve are both sleeved and slidably fitted with the first housing, and the cone The bottom is engaged with the top of the sealing rubber cylinder, and the bottom of the sealing rubber cylinder is engaged with the top of the sliding jacket; The outer wall of the first housing is formed with a guide groove, and the inner wall of the sliding sleeve extends toward the axis to form a guide protrusion that matches the guide groove, and the guide protrusion separates the guide groove and forms a the third cavity and the fourth cavity; Wherein, when the pressure in the fourth cavity is greater than the pressure in the third cavity, the sliding jacket moves upward, and the cone cooperates with the sliding jacket to squeeze the sealing rubber tube, so that The sealing rubber cylinder is opened outward to realize setting seal; When the pressure in the fourth cavity is lower than the pressure in the third cavity, the sliding jacket moves downward, so that the sealing rubber tube shrinks inwardly to realize unsealing. 4. The well completion tester according to claim 1 or 2, wherein the isolation device comprises, at least three flukes arranged on the outer wall of the first housing, the upper ends of the flukes are affixed to the outer wall of the first housing, and the lower ends of the flukes are connected to the outer wall of the first housing A gap is formed between the outer walls; Slidingly fit the cone, the sealing rubber sleeve and the sliding outer sleeve on the outer wall of the first housing in sequence downwards in the axial direction, the bottom of the cone is engaged with the top of the sealing rubber sleeve, The bottom of the sealing rubber tube is engaged with the top of the sliding jacket; The outer wall of the first housing is formed with a guide groove, and the inner wall of the sliding sleeve extends toward the axis to form a guide protrusion that matches the guide groove, and the guide protrusion separates the guide groove and forms a the third cavity and the fourth cavity; Wherein, when the pressure in the fourth cavity is greater than the pressure in the third cavity, the sliding sleeve moves upward, so that the cone moves upward and inserts into the gap, and the fluke moves outward. Opening; the cone cooperates with the sliding outer sleeve to squeeze the sealing rubber tube, so that the sealing rubber tube is opened outward to realize setting seal; When the pressure in the fourth cavity is lower than the pressure in the third cavity, the sliding sleeve moves downward, so that the sealing rubber tube shrinks inward to realize unsealing, so that the cone moves downward out of the gap, and the fluke shrinks inwardly. 5. The completion tester according to claim 4, characterized in that, the number of the flukes is six, and the six flukes are evenly distributed on the outer wall of the first housing in a ring around the axis . 6. The well completion tester according to any one of claims 1 to 5, characterized in that, the first housing is provided with a device that sequentially passes through the first separation layer, the test piston and the slide rod. The first wire-passing pipe, and the bottom of the first wire-passing pipe is connected with the test device. 7. A well completion testing system, comprising an auxiliary controller and the well completion tester as claimed in claim 6; The auxiliary controller includes a second housing with an installation cavity, and a control circuit device and a hydraulic oil tank arranged axially downward in the second housing; Wherein, the lower end of the second casing is connected to the upper end of the first casing, the control circuit device is connected to the testing device, and the hydraulic oil tank is connected to the first cavity, the second The cavity, the third cavity and the fourth cavity are connected. 8. The well completion testing system according to claim 7, characterized in that, a pressure balance device is arranged axially between the control circuit device and the hydraulic oil tank in the second housing; The pressure equalization device includes, a third separation layer formed by extending the inner wall of the second casing toward the axis, a fourth separation layer axially located below the first separation layer and formed by extending the inner wall of the second casing toward the axis, and a balance piston axially disposed between the third separation layer and the fourth separation layer; A fifth cavity is formed between the top of the balance piston and the third separation layer, and a sixth cavity is formed between the bottom of the balance piston and the fourth separation layer; A through hole communicating with both the fifth cavity and the upper cavity is formed on the second housing, and the sixth cavity is connected with the hydraulic oil tank. 9. The well completion testing system according to claim 8, characterized in that, the second housing is provided with axially disposed through the third separation layer, the balance piston, the fourth separation layer and The second wire-passing pipe of the hydraulic oil tank, and the upper end of the second wire-passing pipe is connected with the control circuit device, and the lower end of the second wire-passing pipe is connected with the first wire-passing pipe. 10. The well completion testing system according to any one of claims 7 to 9, characterized in that, the auxiliary controller is also provided with a positioning device for measuring the setting depth.