CN215979359U - Pull-plug type self-locking control device for precisely pumping formation fluid - Google Patents
Pull-plug type self-locking control device for precisely pumping formation fluid Download PDFInfo
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- CN215979359U CN215979359U CN202121919508.3U CN202121919508U CN215979359U CN 215979359 U CN215979359 U CN 215979359U CN 202121919508 U CN202121919508 U CN 202121919508U CN 215979359 U CN215979359 U CN 215979359U
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Abstract
The utility model provides a pull-plug type self-locking control device for precisely sucking stratum fluid, which comprises: a control seat; the driving device comprises a motor, a speed reducer connected to one end of a driving shaft of the motor, a lead screw connected with the output end of the speed reducer through an overrunning clutch, and a sliding piston sleeved on the lead screw; the sampling device comprises a mud bucket connecting sleeve sleeved at one end of the sliding piston, which is far away from the motor, and a sample storage space for the sliding piston to slide is formed in the mud bucket connecting sleeve; the control valve seat comprises a connector seat and a multi-core jack, wherein a multi-core socket is installed in the multi-core jack, the multi-core socket is connected with the multi-core sealing adapter seat by a cable penetrating through a channel in the connector seat, and the output end of the multi-core sealing adapter seat is connected with a multi-core plug on the motor. The utility model enables one control seat to become an individual with an independent sampling function, not only facilitates the manufacture of the sidewall contact device, but also enables the sampling process to be easier to maintain and process through a detachable structure.
Description
Technical Field
The utility model relates to the field of underground sampling, in particular to a pluggable self-locking precise pumping formation fluid control device which is convenient to independently install and disassemble.
Background
With the development of the oil industry, the oil exploitation and exploration technology is also continuously updated, and a stratum sampling instrument is an important component of exploration equipment in the oil exploration field and is used for measuring various data of current drilling, such as inclination, oil quality, underground oil quantity and the like. Formation sampling instruments are typically mounted on a sidewall ram that can be supported at a desired location downhole at any time.
When underground liquid is sampled, the sampling is realized by a sampling device arranged on a sidewall contact device, one sidewall contact device is often provided with a plurality of sampling devices so as to achieve the purpose of sampling for many times when the underground liquid is put into a well, each sampling device at least has the capability of independent on-off so as to prevent samples from being mixed up, and therefore, the sampling devices are required to be respectively controlled.
The existing sampling device is generally directly arranged into a corresponding sampling short section and is connected with the existing sidewall contact device main body through two ends, and the installation mode can cause the whole sidewall contact device to increase, thereby influencing the control effect; and when the mode of integral connection is adopted to realize multiple times of sampling in one time of going into the well, a plurality of sampling short sections need to be installed, and the complexity of the integral structure of the sidewall contact device can be increased.
In addition, the action of the sampling piston can not be accurately controlled in the sampling process of the existing sampling nipple, the suction in the sampling process can be stopped only by utilizing the forward and reverse rotation of the motor to the non-action state, the suction piston and even the motor are easily abraded by the structure, and the service life of the sampling nipple is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pull-plug type self-locking precise pumping formation fluid control device which is convenient to independently mount and dismount.
Specifically, the utility model provides a pull-plug type self-locking precision pumping formation fluid control device, which comprises:
the control seat is hollow and long-strip-shaped and comprises an arc-shaped fixing surface and a semicircular inserting surface, two sides of the length direction of the inserting surface are connected with two sides of the length direction of the fixing surface, and bolt holes penetrating through the fixing surface and the inserting surface are formed in two axial ends of the control seat;
the driving device is arranged in the control seat and comprises a motor capable of realizing forward and reverse rotation, a speed reducer connected to one end of a motor driving shaft, a lead screw connected with the output end of the speed reducer through an overrunning clutch, and a sliding piston sleeved on the lead screw;
the sampling device is arranged in the control seat and comprises a mud bucket connecting sleeve sleeved at one end of the sliding piston, which is far away from the motor, a sample storage space for the sliding piston to slide is formed in the mud bucket connecting sleeve, and the sample storage space is communicated with a sampling port on the plugging surface through a connecting hole;
the control valve seat is connected with one end of the control seat far away from the sampling device by using the adapter sleeve and comprises a connector seat, a multi-core jack is arranged on one side of the connector seat facing the plugging surface, a multi-core socket is arranged in the multi-core jack, a multi-core sealing adapter seat is arranged at one end of the connector seat connected with the control seat, the multi-core socket is connected with the multi-core sealing adapter seat by using a cable to pass through a channel in the connector seat, and the output end of the multi-core sealing adapter seat is connected with a multi-core plug on the motor.
The utility model utilizes an independent control seat to install the driving device, the sampling device and the control valve seat, so that one control seat becomes an individual with an independent sampling function, thereby not only facilitating the manufacture of the sidewall contact device, but also leading the sampling process to be easier to maintain and process through a detachable structure. Each part in the control seat is installed in a mode of being inserted into the control seat respectively, so that the installation and the maintenance of each part are convenient; the overrunning clutch can prevent the lead screw from being damaged by overlarge torque force, and meanwhile, the stop position of the sliding piston can be accurately controlled, so that the sampling process is better controlled.
Drawings
FIG. 1 is a cross-sectional view of the interior of a control pod in accordance with one embodiment of the present invention;
FIG. 2 is a schematic diagram of a plug surface structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a mounting groove for mounting a control seat on a sidewall contact device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control device according to an embodiment of the present invention.
Detailed Description
The structure and implementation of the present solution are described in detail below with specific embodiments and accompanying drawings.
As shown in fig. 1 and 2, in one embodiment of the utility model, a pull-plug type self-locking precision pumping formation fluid control device is disclosed, which generally comprises a control seat 1, a driving device 2 installed in the control seat 1, a sampling device 3 and a control valve seat 4.
As shown in fig. 3, the control seat 1 is a hollow strip-shaped structure, and can be directly fixed in a mounting groove 51 arranged on the sidewall contact device 5 as an independent component, and includes a circular arc-shaped fixing surface 11 with the same radian as the outer surface of the sidewall contact device, and a semicircular insertion surface 12 corresponding to the shape of the mounting groove 51 on the sidewall contact device 5, wherein two sides of the insertion surface 12 in the length direction are connected with two sides of the fixing surface 11 in the length direction, and bolt holes 13 penetrating through the fixing surface 11 and the insertion surface 12 are arranged at two axial ends of the control seat 1. The fixing surface 11 forms a complete cylinder with the outer surface of the push-against device after the control seat 1 is buckled on the push-against device, bolt holes 13 are generally arranged at two ends of the control seat 1, and the control seat 1 is fixed with the push-against device 5 by a screw rod penetrating through the bolt holes 13 after being buckled on the push-against device 5. The interior of the control seat 1 is hollow and is used for installing the following components so as to independently realize the underground sampling process.
The driving device 2 is arranged in the control base and provides power for the sampling device 3, and comprises a motor 21 capable of realizing forward and reverse rotation, a speed reducer 22 connected to one end of a driving shaft of the motor 21, a lead screw 24 connected with the output end of the speed reducer 22 through an overrunning clutch 23, and a sliding piston 25 sleeved on the lead screw 24.
The motor 21 is inserted and fixed by the end of the control seat 1 in an inserting way; the overrunning clutch 23 is a device with torque and self-locking functions, and automatically disengages from the reducer 22 when the motor 21 exceeds the moving limit of the sliding piston 25 in the forward and reverse directions to prevent the lead screw 24 from running over the limit, and automatically connects to the reducer 22 to output normal power when the motor 21 runs in the reverse direction (opposite to the original forward and reverse directions). Such as: when the sliding piston 25 moves to an end close to the overrunning clutch 23 under the driving of the lead screw 24, the sampling device 3 finishes sampling, the sliding piston 25 cannot move any more, and the sliding piston 25 is driven by the lead screw 24 to apply pressure to the end by the continuous rotation of the motor 21, which damages the thread between the sliding piston 25 and the lead screw 24 and increases the abrasion, and after the overrunning clutch 23 is adopted, once the motor 21 continues to rotate and the sliding piston 25 reaches the limit position, the rotating force output by the motor 21 is greater than a certain set threshold value, at this time, the overrunning clutch 23 is temporarily separated from the reducer 22, and the rotating force applied by the motor 21 to the lead screw 24 is disconnected, so that the lead screw 24 and the sliding piston 25 are protected; when the rotating force output by the motor is lower than the set threshold value, the overrunning clutch 23 is automatically connected with the speed reducer 22 again.
In addition, when the sidewall contact device works in the underground, the sidewall contact device can also encounter the problem that hydraulic oil cannot enter an oil storage space 27 in time, at the moment, the pressure in the oil storage space 27 is smaller than the external pressure, and a phenomenon of down-hole liquid backflow can be formed in the sample storage space 32, at the moment, even if the motor 21 does not work at the moment, the sliding piston 25 can drive the screw rod 24 to move towards one side of the motor 21 under the pushing of down-hole external liquid, and the moving process can also cause damage to the motor 21, so that the overrunning clutch 23 can also disconnect the connection between the screw rod 24 and the speed reducer 22 in the state, and further protect the motor 21. The overrunning clutch 23 is a mature product in the market, and a product with corresponding functions can be selected according to different requirements, and the internal structure of the overrunning clutch is not described in detail here.
The sampling device 3 is also installed in the control base 1 and comprises a mud bucket connecting sleeve 31 sleeved inside the control base 1, a sample storage space 32 for the sliding of the sliding piston 25 is formed inside the mud bucket connecting sleeve 31, and the sample storage space 32 is communicated with a sampling port 34 on the insertion surface 12 through a connecting hole 33. The mud bucket connecting sleeve 31 adopts an independently installed structure, so that the mud bucket can be conveniently taken out from the control seat 1 after later sampling is finished; when the sliding piston 25 is driven by the screw 24 and located at one end of the screw 24 far from the motor 21, the sliding piston extends into the sample storage space 32, and when the sliding piston 25 moves to one end of the screw 24 close to the motor 21, a suction force is formed in the sample storage space 32 in the movement process, so that downhole fluid is pumped into the sample storage space 32.
In the present embodiment, the components of the drive device 2 and the sampling device 3 are sequentially mounted in the control stand 1.
The control valve seat 4 is installed at one end of the control seat 1 far away from the sampling device 3, is connected with the control seat 1 by an annular adapter sleeve 4, and comprises a connector seat 41, a multi-core jack 42 is arranged at one side of the connector seat 41 facing the plugging surface 12, a multi-core socket 43 is installed in the multi-core jack 42, and when the control seat 1 is buckled in a mounting groove 51 on the push rod 5, the multi-core socket 43 is plugged with a multi-core interface 52 in the mounting groove 51 so as to receive a control signal of the push rod 5.
The multi-core sealing adapter 44 is installed at one end of the connector base 41 connected with the control base 1, the multi-core socket 43 is connected with the multi-core sealing adapter 44 by a cable 431 through a channel 45 in the connector base 41, the multi-core plug 211 is installed at one end of the motor 21 close to the multi-core sealing adapter 44, and after the connector base 41 is installed on the control base 1, the output end of the multi-core sealing adapter 44 is connected with the multi-core plug 211 on the motor 21.
The adapter sleeve 46 is screwed to the joint base 41 through an internal thread and to the end of the control base 1 through an external thread, and sealing grooves 461 having sealing rings 462 are provided on the inner and outer surfaces of the adapter sleeve 46, respectively. An axial concave key 212 is arranged at the position of the motor 21 for installing the multi-core plug 211, a convex key 441 correspondingly spliced with the concave key 212 is arranged on the multi-core sealing adapter 44, and the splicing alignment of the multi-core sealing adapter 44 and the multi-core plug 211 can be facilitated through the matching of the concave key 212 and the convex key 441. Furthermore, the passage 45 in the joint base 1 is filled with hydraulic oil, so that the pressure resistance of the entire passage 45 can be improved, and the wall thickness can be made thinner as compared with a gas-filled passage, thereby providing a larger space for mounting components.
When the control seat 1 of the embodiment is used, the driving device 2 and the sampling device 3 are sequentially connected, the control valve seat 4 is installed, the whole control seat 1 is buckled on the sidewall contact device and fixed, the multi-core socket 43 of the buckled control seat 1 is plugged with a control interface on the sidewall contact device to receive a control instruction of the sidewall contact device, a signal is transmitted to the motor 21 through the multi-core sealing adapter seat 44 and the multi-core plug 211, the driving motor 21 rotates forwards or backwards, the rotation force of the motor 21 is transmitted to the lead screw 24 through the reducer 22 and the overrunning clutch 23, the rotation of the lead screw 24 drives the sliding piston 25 to move back and forth on the lead screw 24, and suction and discharge force is formed in the sample storage space 32 of the mud bucket connecting sleeve 31.
When the motor 21 rotates forward, the sliding piston 25 moves towards the motor 21 to generate suction force in the sample storage space 32, and at the moment, external slurry (sample) can be sucked into the sample storage space 32 through the sampling port 14 on the control seat 1; when the motor 21 rotates in the reverse direction, the sliding piston 25 moves in the direction of the sample storage space 32, and at this time, the slurry in the sample storage space 32 is discharged out of the sample storage space 32 through the sampling port 14 of the control console 1.
When the sampling is completed, the sidewall contact device is lifted to the well, the control seat 1 can be detached separately, and then the slurry barrel connecting sleeve 31 is taken out to process the sample therein. The control seat 1 in the embodiment can independently complete the sampling and storage of downhole liquid, so that a plurality of control seats 1 can be simultaneously installed on the sidewall contact device to achieve the purposes of one-time downhole and respective sampling at different depths, the sampling efficiency can be improved, and the complexity of the structure of the sidewall contact device can be reduced.
The embodiment utilizes an independent control seat to install the driving device, the sampling device and the control valve seat, so that the control seat becomes an individual with an independent sampling function, the manufacturing of the sidewall contact device is facilitated, and the sampling process is easier to maintain and process through a detachable structure. Each part in the control seat is installed in a mode of being inserted into the control seat respectively, so that the installation and the maintenance of each part are convenient; the overrunning clutch can prevent the lead screw from being damaged by overlarge torque force, and meanwhile, the stop position of the sliding piston can be accurately controlled, so that the sampling process is better controlled.
In order to conveniently detach the mud bucket connecting sleeve 31, a sealing plug 15 which limits the mud bucket connecting sleeve 31 in the control seat 1 is arranged at one end of the control seat 1 where the mud bucket connecting sleeve 31 is arranged; the end of the mud bucket connecting sleeve 31 facing the sliding piston 25 is an open structure, the end contacting the sealing plug 15 is a closed end 311, the sealing plug 15 is screwed on the end of the control base 1 by screw threads, and then the screw rod penetrating through the axle center of the mud bucket connecting sleeve 31 is connected with the closed end 311 of the mud bucket connecting sleeve 31, so that the mud bucket connecting sleeve 31 can be prevented from rotating radially. The passage of the sample storage space 32 connected to the sampling port 14 is provided at the closed end 311.
As shown in fig. 4, in an embodiment of the present invention, the driving device 2 further includes an inner connecting sleeve 26 disposed between the sliding piston 25 and the inner surface of the control base 1, the inner connecting sleeve 26 is a ring-shaped tube structure, a concave axial sliding slot 261 is disposed on the inner surface of the inner connecting sleeve 26, and a limiting block 251 is disposed on the outer surface of the sliding piston 25 and is clamped into the axial sliding slot 261; the cooperation of the axial sliding grooves 261 and the stop block 251 prevents the sliding piston 25 from rotating radially when moving on the threaded spindle 24.
The sliding piston 25 of the present embodiment is a tubular structure, the whole is sleeved on the outer surface of the screw 24 through an internal thread, a protruding closed ring 252 is arranged at one end of the sliding piston 25 close to the motor 21, the outer surface of the closed ring 252 is in contact with the inner surface of the inner connecting sleeve 26, and the limiting block 251 is arranged on the outer surface of the closed ring 252; the other end of the sliding piston 25 is a solid block 253, the diameter of the solid block 253 is consistent with the inner diameter of the sample storage space 32 of the mud bucket connecting sleeve 31, and the solid block 253 can extend into the sample storage space 32 to move when the sliding piston 25 moves, so that suction and discharge force is formed in the sample storage space 32. An oil storage space 27 for storing hydraulic oil is reserved between the sliding piston 25 and the overrunning clutch 23, and an oil storage space 27 for storing hydraulic oil is also reserved between the sliding piston 25 and the inner connecting sleeve 26, so that the sliding piston 25 is positioned in the hydraulic oil when driven by the screw rod 24 to move; storing hydraulic oil in the space of the sliding piston 25 can increase the pressure resistance of the inner space, thereby reducing the wall thickness, not only reducing the overall weight, but also providing a more ample space for component installation. The oil storage space 27 communicates with the oil passage port 16 on the control stand 1 through an internal pipe.
In addition, through the setting of internal connecting sleeve 26, can reduce the wearing and tearing to control seat 1, when the problem appears, only need change internal connecting sleeve 26 can, greatly reduced the cost. For the same reason, a decelerator connecting sleeve 221 is installed between the decelerator 22 and the inner surface of the control base 1, and the inner surface of the decelerator connecting sleeve 221 is threadedly engaged with the outer surface of the decelerator 22.
In order to control the screw 24, a convex limiting ring 241 is provided at one end of the screw 24 close to the overrunning clutch 23, a supporting bearing 28 is installed at one side of the limiting ring 241 close to the overrunning clutch, a locking spiral 281 is used for fixing the supporting bearing at the end, and a protective sleeve 282 is installed between the supporting bearing 28 and the inner surface of the control base 1. The protective sleeve 282 is inserted into the control base 1, and can only move along the axial direction of the control base 1 but can not rotate radially, and the outer surface of the support bearing 28 contacts with the inner surface of the protective sleeve 282, when the screw 24 rotates, the support bearing 28 can limit the screw 24 on a corresponding axial line, and the inner ring can also rotate synchronously with the screw 24; the locking ring 281 is screwed into the end of the spindle 24 by means of an internal thread in order to clamp the support bearing 28 between the stop rings 241.
In one embodiment of the present invention, the multi-core insertion hole 42 on the connector base 41 is a hollow cylinder protruding toward the plugging surface 12, and a plurality of sealing grooves with sealing rings are arranged on the outer circumference; the height of the multi-core jack 42 is lower than the bottom surface of the plugging surface 12; the structure not only facilitates the connection and the sealing of the multi-core plug 43 and the socket on the sidewall contact device, but also can not bear the weight of the whole control seat.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the utility model have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the utility model may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the utility model. Accordingly, the scope of the utility model should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. The utility model provides a pull out formula of inserting accurate suction stratum fluid controlling means of auto-lock which characterized in that includes:
the control seat is hollow and long-strip-shaped and comprises an arc-shaped fixing surface and a semicircular inserting surface, two sides of the length direction of the inserting surface are connected with two sides of the length direction of the fixing surface, and bolt holes penetrating through the fixing surface and the inserting surface are formed in two axial ends of the control seat;
the driving device is arranged in the control seat and comprises a motor capable of realizing forward and reverse rotation, a speed reducer connected to one end of a motor driving shaft, a lead screw connected with the output end of the speed reducer through an overrunning clutch, and a sliding piston sleeved on the lead screw;
the sampling device is arranged in the control seat and comprises a mud bucket connecting sleeve sleeved at one end of the sliding piston, which is far away from the motor, a sample storage space for the sliding piston to slide is formed in the mud bucket connecting sleeve, and the sample storage space is communicated with a sampling port on the plugging surface through a connecting hole;
the control valve seat is connected with one end of the control seat far away from the sampling device by using the adapter sleeve and comprises a connector seat, a multi-core jack is arranged on one side of the connector seat facing the plugging surface, a multi-core socket is arranged in the multi-core jack, a multi-core sealing adapter seat is arranged at one end of the connector seat connected with the control seat, the multi-core socket is connected with the multi-core sealing adapter seat by using a cable to pass through a channel in the connector seat, and the output end of the multi-core sealing adapter seat is connected with a multi-core plug on the motor.
2. The pluggable and lockable precise pumping formation fluid control device according to claim 1,
the adapter sleeve is in threaded connection with the joint base through internal threads and is in threaded connection with the end part of the control base through external threads.
3. The pull-plug type self-lockable precision pumping formation fluid control device according to claim 2,
an axial concave key is arranged at the position of the motor for installing the multi-core plug, and a convex key which is correspondingly inserted with the concave key is arranged on the multi-core sealing adapter.
4. The pull-plug type self-lockable precision pumping formation fluid control device according to claim 2,
the multi-core jack on the joint seat is a hollow cylinder protruding towards the direction of the plug surface, the height of the multi-core jack is lower than the bottom surface of the plug surface, and a plurality of sealing grooves with sealing rings are arranged on the outer circumference of the multi-core jack.
5. The pluggable and lockable precise pumping formation fluid control device according to claim 1,
and a sealing plug for limiting the connecting sleeve of the mud bucket in the control seat is screwed at one end of the connecting sleeve of the mud bucket on the control seat.
6. The pluggable and lockable precise pumping formation fluid control device according to claim 1,
the driving device further comprises an inner connecting sleeve arranged between the sliding piston and the inner surface of the control seat, an inwards concave axial sliding groove is formed in the inner surface of the inner connecting sleeve, and a limiting block clamped into the axial sliding groove is arranged on the outer surface of the sliding piston.
7. The pluggable self-lockable precision pumping formation fluid control device according to claim 6,
the screw rod is provided with a convex limiting ring at one end close to the overrunning clutch, a supporting bearing and a locking spiral ring for fixing the supporting bearing at one end close to the overrunning clutch are arranged on the limiting ring, and a protective sleeve is arranged between the supporting bearing and the inner surface of the control seat.
8. The pluggable and lockable precise pumping formation fluid control device according to claim 7,
the sliding piston is of a hollow tubular structure, the sliding piston is integrally sleeved on the outer surface of the lead screw through internal threads, a protruding closed ring is arranged at one end, close to the motor, of the sliding piston, the outer surface of the closed ring is in contact with the inner surface of the inner connecting sleeve, and the limiting block is arranged on the outer surface of the closed ring; the other end of the sliding piston is a solid block, the diameter of the solid block is consistent with the inner diameter of the mud bucket connecting sleeve, and the solid block can extend into the mud bucket connecting sleeve when the sliding piston moves and generates power for sucking and discharging mud.
9. The pluggable and lockable precise pumping formation fluid control device according to claim 1,
the overrunning clutch only starts a power transmission function when the motor works normally, but automatically disengages from the speed reducer when the positive and negative rotation of the motor exceeds the movement limit of the sliding piston so as to prevent the lead screw from running in an overrun way, and automatically connects the speed reducer to output normal power when the motor runs in the opposite direction.
10. The pluggable and lockable precise pumping formation fluid control device according to claim 1,
the control seat is buckled in the mounting groove through one side of the plugging surface and is fixed on the backup device through bolts penetrating through bolt holes at two ends of the control seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121919508.3U CN215979359U (en) | 2021-08-16 | 2021-08-16 | Pull-plug type self-locking control device for precisely pumping formation fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121919508.3U CN215979359U (en) | 2021-08-16 | 2021-08-16 | Pull-plug type self-locking control device for precisely pumping formation fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215979359U true CN215979359U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121919508.3U Active CN215979359U (en) | 2021-08-16 | 2021-08-16 | Pull-plug type self-locking control device for precisely pumping formation fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215979359U (en) |
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2021
- 2021-08-16 CN CN202121919508.3U patent/CN215979359U/en active Active
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