CN210977355U - Control system of injection head clamping device - Google Patents
Control system of injection head clamping device Download PDFInfo
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- CN210977355U CN210977355U CN201921364675.9U CN201921364675U CN210977355U CN 210977355 U CN210977355 U CN 210977355U CN 201921364675 U CN201921364675 U CN 201921364675U CN 210977355 U CN210977355 U CN 210977355U
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Abstract
The utility model provides a fill into first clamping device's control system, include: the first speed acquisition device is connected with a clamping chain of the injection head clamping device; the second speed acquisition device is connected with the guider of the injection head; the first speed acquisition device and the second speed acquisition device are respectively electrically connected with the control device, the control device is connected with the injection head clamping device through the control loop, and the control device adjusts the clamping force of the injection head clamping device on the continuous tube through the control loop. The utility model provides a fill in first clamping device's control system can carry out real-time supervision and adjustment to fill in first clamping device's hydraulic clamping force to whether produce the elephant trunk to carry out real-time supervision to the coiled tubing, can fix the continuous pipe clamp fastening rapidly when detecting the emergence of the elephant trunk condition, prevent the enlargement of the elephant trunk condition.
Description
Technical Field
The utility model belongs to the technical field of coiled tubing unit technique and specifically relates to indicate a fill in head clamping device's control system.
Background
With the popularization and application of the continuous pipe operation machine at home and abroad, the continuous pipe equipment and technology are comprehensively developed. The injection head is used as a first core component in the continuous pipe equipment, is responsible for the operation of clamping the continuous pipe, and the safety and the reliability directly determine the performance of the whole continuous pipe operation machine and the success or failure of construction.
With the requirements of oil field depth (secondary) development, shale (oil) gas, deep well and ultra-deep well working conditions, the design tonnage of the injection head is developed from 40000L B in the early stage to 200000L B which is the largest at present, and the well body is deeper and deeper, and has three high temperatures (high temperature, high pressure and high H content)2S) well conditions are increasingly complex, and the safety of the injection head clamping device is particularly important.
At present, a filling head clamping device on the market basically adopts a hydraulic driving mode and a manual control mode, and particularly controls a horizontal clamping oil cylinder to apply transverse clamping force to left and right clamping chains through manual operation, so that the two clamping chains clamp a continuous pipe positioned between the two clamping chains through clamping blocks arranged on the two clamping chains, longitudinal friction force is generated, and the continuous pipe is driven to move along a guider (gooseneck) to be lifted.
But since the clamping force of the clamping chain is equal to the clamping hydraulic force multiplied by the effective contact friction coefficient between the clamping blocks and the coiled tubing, ideally the clamping hydraulic force is proportional to the coiled tubing lifting or injection force, the coefficient of friction can also vary unexpectedly due to factors such as tubing ovality, tubing surface conditions (oil/grease, paraffin, frac sand, mud, other chemicals, etc.), grip block conditions (wear, smoothness, damage), thus causing certain difficulty to the adjustment of the clamping hydraulic pressure for operators, and continuously supplying high pressure can influence the service life of the injection head clamping device (comprising a clamping chain, a bracket, a bearing, a clamping block and the like) and the continuous pipe, the chute is easy to be caused due to untimely increase and adjustment, and the chute is out of control due to untimely judgment and treatment of the chute, so that the collapse of a well head, the pull of a roller and even serious casualty accidents can be caused.
Under the manual regulation mode, operating personnel must observe the change of load table at any time and adjust and press from both sides tight hydraulic pressure, and the syringe is hung in midair far away from operating personnel forty-five meters, cause the control room shake to perceive and judge whether the elephant trunk through the camera control on the syringe or (when the elephant trunk) continuous tube to the huge pulling force of roller car, and this kind of remote control and perception require very high to operating personnel's operating skill, operating mode discernment and urgent handling capacity, and operating condition and risk discernment rely on operating personnel experience judgement entirely, and operating personnel's cognitive level is uneven, and the risk of operation can be increased in time to tired carelessness or prejudgement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a filling head clamping device's control system can carry out real-time supervision and adjustment to filling head clamping device's hydraulic clamping force to whether produce the elephant trunk and carry out real-time supervision to the elephant trunk, can fix the continuous pipe clamp fastening rapidly when detecting the emergence of the elephant trunk condition, prevent the enlargement of the elephant trunk condition.
In order to achieve the above object, the present invention provides a control system for an injection head clamping device, wherein the control system for the injection head clamping device comprises a first speed acquisition device, a second speed acquisition device and a control device;
the first speed acquisition device is connected with a clamping chain of the injection head clamping device and is used for monitoring and recording the running speed of the clamping chain;
the second speed acquisition device is connected with a guider of the injection head and is used for monitoring and recording the running speed of the continuous pipe moving along the guider;
the first speed acquisition device and the second speed acquisition device are respectively electrically connected with the control device, the control device is connected with the injection head clamping device through a control loop, and the control device adjusts the clamping force of the injection head clamping device on the coiled tubing through the control loop according to the running speed of the clamping chain and the running speed of the coiled tubing.
The control system of the injection head clamping device, wherein the injection head clamping device of the injection head comprises a plurality of groups of clamping assemblies, each group of clamping assemblies is arranged in parallel, and each group of clamping assemblies is connected with the control circuit.
The control system of the injection head clamping device as described above, wherein each group of the clamping assemblies includes a first pressure cylinder, a second pressure cylinder, a first pipeline and a second pipeline, the first pressure cylinder is internally provided with a first chamber and a second chamber which are independent of each other, the second pressure cylinder is internally provided with a third chamber and a fourth chamber which are independent of each other, a first end of the first pipeline is respectively communicated with the first chamber and the fourth chamber through a tee joint, a first end of the second pipeline is respectively communicated with the second chamber and the third chamber through a tee joint, a second end of the first pipeline and a second end of the second pipeline are respectively communicated with the control circuit, and the clamping force of the injection head clamping device on the coiled tubing is increased in a state that the first pipeline pressurizes the first chamber and the fourth chamber, and the second pipeline pressurizes the second chamber, And in the pressurized state of the third chamber, the clamping force of the injection head clamping device on the continuous tube is reduced.
The control system of the injection head clamping device is characterized in that a clamping energy accumulator, a clamping pressure transmitter and a clamping pressure retaining valve are sequentially arranged on the first pipeline along the direction from the first end of the first pipeline to the second end of the first pipeline.
The control system of the injection head clamping device comprises a main control loop, an emergency clamping control loop and an emergency clamping control loop, wherein the main control loop and the emergency clamping control loop are connected with a power system, and the emergency clamping control loop is connected with a booster pump.
The control system of the injection head clamping device, wherein the main control loop includes a first main pipeline and a second main pipeline, one end of the first main pipeline is respectively communicated with the second ends of the first pipelines of the clamping assemblies, and faces a direction close to the clamping assemblies, a pressure reducing valve, a clamping oil supply pressure transmitter and a clamping switching valve are sequentially arranged on the first main pipeline, one end of the second main pipeline is respectively communicated with the second ends of the second pipelines of the clamping assemblies, a main branch pipeline is arranged on the second main pipeline and is respectively communicated with the pressure reducing valve and the clamping switching valve, and the other end of the first main pipeline and the other end of the second main pipeline are respectively connected with the power system.
The control system of the injection head clamping device, wherein the emergency clamping control loop includes a third main pipeline, one end of the third main pipeline is respectively communicated with the first pipelines of the plurality of groups of clamping assemblies through a plurality of emergency branch pipelines arranged in parallel, the communication position of each emergency branch pipeline and each corresponding first pipeline is located between the clamping pressure transmitter and the clamping pressure retaining valve on each first pipeline, and faces the direction close to each clamping assembly, an emergency main check valve, an emergency accumulator and an electromagnetic valve are sequentially arranged on the third main pipeline, and the other end of the third main pipeline is connected with the power system.
The control system of the injection head clamping device, wherein each emergency branch pipeline is provided with an emergency branch check valve.
The control system of the injection head clamping device, wherein the emergency clamping control loop comprises a fourth main pipeline, one end of the fourth main pipeline is respectively communicated with the second end of the first pipeline of each clamping assembly, and the fourth main pipeline is sequentially provided with an emergency clamping supply valve and an emergency check valve in a direction close to each clamping assembly, and the other end of the fourth main pipeline is connected with the booster pump.
The control system of the injection head clamping device as described above, wherein the first speed collecting device includes a first coupler and a first encoder, the first encoder is coaxially mounted on the driven sprocket of the clamping chain of the injection head clamping device through the first coupler, and the first encoder is electrically connected to the control device.
The control system of the injection head clamping device comprises a friction wheel, an elastic pressing mechanism, a second coupler and a second encoder, wherein the second encoder is coaxially connected with the friction wheel through the second coupler, the elastic pressing mechanism presses the wheel surface of the friction wheel onto the outer surface of the coiled tubing, the friction wheel is driven to rotate in the moving process of the coiled tubing, and the second encoder is electrically connected with the control device.
Compared with the prior art, the utility model has the advantages as follows:
the utility model provides a fill in first clamping device's control system can carry out real-time supervision and adjustment to fill in first clamping device's hydraulic clamping force to whether produce the elephant trunk to carry out real-time supervision to the coiled tubing, can fix the continuous pipe clamp fastening rapidly when detecting the emergence of the elephant trunk condition, prevent the enlargement of the elephant trunk condition.
Drawings
The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. Wherein:
FIG. 1 is a schematic structural view of the present invention in a state where some parts are mounted on the injector head;
fig. 2 is a control circuit schematic diagram of a control system of the injector head clamping device provided by the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is an enlarged view of the structure at C in FIG. 1;
fig. 6 is a control flow chart of a control system of the injector head clamping device provided by the present invention;
fig. 7 is another control flow chart of the control system of the injector head clamping device provided by the present invention.
The reference numbers illustrate:
1. an injection head clamping device;
11. clamping the chain;
12. a clamping assembly;
121. a first pressure cylinder;
1211. a first chamber;
1212. a second chamber;
122. a second pressure cylinder;
1221. a third chamber;
1222. a fourth chamber;
123. a first pipeline;
124. a second pipeline;
125. clamping the accumulator;
126. clamping the pressure transmitter;
127. clamping the pressure retaining valve;
2. a guide;
21. a coiled tubing;
3. a frame;
4. a first speed acquisition device;
41. a first coupling;
42. a first encoder;
5. a second speed acquisition device;
51. a friction wheel;
52. an elastic pressing mechanism;
53. a second coupling;
54. a second encoder;
6. a control loop;
61. a main control loop;
611. a first main pipeline;
612. a second main pipeline;
6121. a main branch pipeline;
613. a pressure reducing valve;
614. clamping the oil supply pressure transmitter;
615. clamping the switching valve;
62. an emergency clamping control loop;
621. a third main pipeline;
622. an emergency branch line;
623. an emergency master check valve;
624. an emergency accumulator;
625. an electromagnetic valve;
626. an emergency branch check valve;
63. an emergency clamping control loop;
631. a fourth main pipeline;
632. an emergency pinch supply valve;
633. an emergency check valve;
7. a warning light.
Detailed Description
In order to clearly understand the technical solution, purpose and effect of the present invention, the detailed embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, the injection head includes frame 3, locate frame 3 inside injection head clamping device 1 and locate the director 2 (also called the gooseneck) of frame 3 top, the utility model provides an injection head clamping device control system is used for carrying out real-time supervision and control to injection head clamping device 1, judges the behavior of coiled tubing 21 through real-time supervision, can adjust injection head clamping device 1 fast when the elephant trunk phenomenon appears in coiled tubing 21, and the tight chain 11 of clamp of increase injection head clamping device 1 is to the clamping-force of coiled tubing 21, presss from both sides tight fixedly with coiled tubing 21 to prevent the enlargement of elephant trunk phenomenon.
As shown in fig. 1 to 5, the present invention provides a control system of a syringe clamping device, also called a syringe chute automatic emergency treatment device, wherein the control system of the syringe clamping device comprises a first speed acquisition device 4, a second speed acquisition device 5 and a control device (not shown in the figure);
the first speed acquisition device 4 is connected with a clamping chain 11 of the injection head clamping device 1, and the first speed acquisition device 4 is used for monitoring and recording the running speed and the running direction of the clamping chain 11;
the second speed acquisition device 5 is connected with the guider 2 of the injection head, and the second speed acquisition device 5 is used for monitoring and recording the running speed and the running direction of the continuous pipe 21 moving along the guider 2;
the first speed acquisition device 4 and the second speed acquisition device 5 are respectively electrically connected with the control device, the running speed of the clamping chain 11 and the running speed of the continuous pipe 21 are fed back to the control device, the control device is connected with the injection head clamping device 1 through the control loop 6, the control device judges whether the pipe slipping phenomenon occurs or not according to the running speed of the clamping chain 11 and the running speed of the continuous pipe 21, when the pipe slipping phenomenon does not occur, the clamping force of the injection head clamping device 1 on the continuous pipe 21 is kept unchanged, and when the pipe slipping phenomenon occurs, the clamping force of the injection head clamping device 1 on the continuous pipe 21 is adjusted through the control loop 6, so that the injection head clamping device 1 clamps and fixes the continuous pipe 21, and the pipe slipping phenomenon stops.
Further, as shown in fig. 2, the present invention provides a control system for an injector head clamping device, wherein, the injection head clamping device 1 comprises a plurality of groups of clamping components 12, each group of clamping components 12 are arranged in parallel along the vertical direction, and each group of clamping assemblies 12 is connected with the control circuit 6, the control circuit 6 can control a plurality of groups of clamping assemblies 12 simultaneously or can control one group of clamping assemblies 12 individually, as shown in fig. 2, the clamping assemblies 12 can be set into an upper group, a middle group and a lower group, can guarantee the centre gripping effect of injection head clamping device 1 to coiled tubing 21, nevertheless need explain that the quantity of clamping component 12 also can not be for three groups, and the technical personnel in the field can be according to the structure of injection head, and factors such as the position space of installing adjust the quantity of clamping component 12, the utility model discloses do not use this as the limit.
Furthermore, as shown in fig. 2, the utility model provides a control system of injection head clamping device, wherein, each group of clamping components 12 includes a first pressure cylinder 121, a second pressure cylinder 122, a first pipeline 123 and a second pipeline 124, the piston in the first pressure cylinder 121 and the piston in the second pressure cylinder 122 can be close to each other and make the injection head clamping device 1 increase the clamping force to the coiled tubing 21 so as to clamp and fix the coiled tubing 21, and the piston in the first pressure cylinder 121 and the piston in the second pressure cylinder 122 can be far away from each other and make the injection head clamping device 1 decrease the clamping force to the coiled tubing 21 so as to loosen the clamping to the coiled tubing 21;
the first cylinder 121 is separated by a piston to form a first chamber 1211 and a second chamber 1212 which are independent of each other, the second cylinder 122 is separated by a piston to form a third chamber 1221 and a fourth chamber 1222 which are independent of each other, the first end of the first pipeline 123 is respectively communicated with the first chamber 1211 and the fourth chamber 1222 through a tee joint, the first end of the second pipeline 124 is respectively communicated with the second chamber 1212 and the third chamber 1221 through a tee joint, the second end of the first pipeline 123 and the second end of the second pipeline 124 are respectively communicated with the control circuit 6, the second chamber 1212 and the third chamber 1221 are respectively communicated with the second chamber 1212 and the fourth chamber 1222 through the first pipeline 123 in a pressurized state, the pressure relief piston in the first cylinder 121 and the piston in the second cylinder 122 are close to each other, the clamping force of the injection head clamping device 1 to the continuous tube 21 is increased, and the pressure relief piston in the second chamber 1212 and the second chamber 1212 is close to the second chamber 1222 through the second pipeline 124, In the pressurized state of the third chamber 1221, the first chamber 1211 and the fourth chamber 1222 are depressurized through the first pipeline 123, the piston in the first pressure cylinder 121 and the piston in the second pressure cylinder 122 are far away from each other, and the clamping force of the injection head clamping device 1 on the continuous pipe 21 is reduced. Preferably, as shown in fig. 2, a clamp accumulator 125, a clamp pressure transmitter 126 and a clamp pressure retaining valve 127 are sequentially provided on the first pipe 123 in a direction from the first end of the first pipe 123 to the second end of the first pipe 123, the clamp accumulator 125 is used for holding pressure while suppressing pressure fluctuation in the first pipe 123, and the clamp pressure retaining valve 127 is used for retaining the pressure in the first chamber 1211 of the first pressure cylinder 121,
The pressure in the fourth chamber 1222 of the second pressure cylinder 122 and in the first conduit 123 between the clamping pressure retention valve 127 and the clamping assembly 12.
Further, as shown in fig. 2, the utility model provides a control system of injector head clamping device, wherein, control circuit 6 includes main control circuit 61, urgent clamp control circuit 62 and urgent clamp control circuit 63, main control circuit 61 and urgent clamp control circuit 62 all meet with driving system (not shown in the figure), urgent clamp control circuit 63 meets with the booster pump; the main control loop 61 is used for providing normal pressure supply for the injection head clamping device 1 in the daily production process, the injection head clamping device 1 is kept clamped to drive the continuous pipe 21 to normally operate, the emergency clamping control loop 62 is used for carrying out emergency braking on the injection head clamping device 1 when the control device judges that the pipe slipping phenomenon occurs in advance, the injection head clamping device 1 is enabled to clamp and fix the continuous pipe 21, and the emergency clamping control loop 63 is used for providing standby power for the injection head clamping device through the booster pump under the condition that the power system fails to normally supply pressure, so that the continuous pipe 21 is clamped and fixed or the normal operation of the continuous pipe 21 is ensured.
Furthermore, as shown in fig. 2, the present invention provides a control system for an injection head clamping device, wherein the main control circuit 61 includes a first main pipeline 611 and a second main pipeline 612, one end of the first main pipeline 611 is respectively communicated with the second end of the first pipeline 123 of each set of clamping assembly 12, and the first main pipeline 611 is sequentially provided with a pressure reducing valve 613, a clamping oil supply pressure transmitter 614 and a clamping switching valve 615 in a direction approaching to each clamping assembly 12, so as to realize the pressurization and pressure relief of the first chamber 1211 of the first pressure cylinder 121 and the fourth chamber 1222 of the second pressure cylinder 122 of each clamping assembly 12 through the first main pipeline 611, specifically, the clamping oil supply pressure is adjusted through the pressure reducing valve 613 under normal conditions during operation, then the pressure supply or pressure relief operation is performed through the clamping switching valve 615, and then the on/off operation is performed through the clamping pressure maintaining valve 127 of each clamping assembly 12, the adjustment of the clamping hydraulic pressure (i.e. the clamping force) of each clamping assembly 12 is completed, one end of the second main pipe 612 is respectively communicated with the second end of the second pipe 124 of each clamping assembly 12, the pressurization and pressure release of the second chamber 1212 of the first pressure cylinder 121 and the third chamber 1221 of the second pressure cylinder 122 of each clamping assembly 12 are realized through the second main pipe 612, the specific process is similar to the pressurization and pressure release process of the first chamber 1211 of the first pressure cylinder 121 and the fourth chamber 1222 of the second pressure cylinder 122, which is not described herein again, the main branch pipe 6121 is arranged on the second main pipe 612 and is respectively communicated with the pressure reducing valve 613 and the clamping switching valve 615, the other end of the first main pipe 611 and the other end of the second main pipe 612 are respectively connected with the power system, and the power system provides pressure to the first main pipe 611 and the second main pipe 612.
Furthermore, as shown in fig. 2, the present invention provides a control system for a clamping device of an injector, wherein the emergency clamping control circuit 62 includes a third main pipeline 621, one end of the third main pipeline 621 is connected to the first pipelines 123 of a plurality of groups of clamping assemblies 12 through a plurality of emergency branch pipelines 622 connected in parallel, each emergency branch pipeline 622 is connected to each clamping assembly 12 one by one, the communication position of each emergency branch pipeline 622 and each corresponding first pipeline 123 is located between the clamping pressure transmitter 126 and the clamping pressure maintaining valve 127 on each first pipeline 123, and faces the direction close to each clamping assembly 12, the third main pipeline 621 is sequentially provided with an emergency main check valve 623, an emergency energy accumulator 624 and an electromagnetic valve 625, each emergency branch pipeline 622 is provided with an emergency branch check valve 626, each emergency main check valve 623 and each emergency branch check valve 626 are check valves capable of only supplying one-way fluid to each clamping assembly 12, the hydraulic energy accumulated by the emergency accumulator 624 stands by at any time, when the control device judges that a pipe chute occurs, a signal is sent to the electromagnetic valve 625 immediately, the electromagnetic valve 625 is powered on and conducted, the hydraulic pressure of each clamping assembly 12 is rapidly improved (namely the clamping force of each clamping assembly 12 is improved) by the emergency accumulator 624 through each emergency branch one-way valve 626, an operator adjusts the proper clamping force through the main control circuit 61, after the operation speed of the clamping chain 11 and the operation speed of the continuous pipe 21 synchronously operate for a certain time, each component of the emergency clamping control circuit 62 is reset, the emergency clamping state is automatically released, the other end of the third main pipeline 621 is connected with the power system, and the power system provides pressure for the third main pipeline 621.
Furthermore, as shown in fig. 2, the present invention provides a control system for an injector head clamping device, wherein, the emergency clamping control circuit 63 includes a fourth main pipe 631, one end of the fourth main pipe 631 is respectively communicated with the second end of the first pipe 123 of each clamping assembly 12, and faces to the direction close to each clamping assembly 12, an emergency clamping supply valve 632 and an emergency one-way valve 633 are sequentially arranged on the fourth main pipe 631, the other end of the fourth main pipe 631 is connected with a booster pump (not shown in the figure), the booster pump may be a pneumatic booster pump, when the power system fails and can not supply pressure normally, the emergency clamp supply valve 632 of the emergency clamp control circuit 63 can be switched to an open position, and the pressure of the pneumatic booster pump is supplied to each clamp assembly 12 through the emergency check valve 633 for one-way backup hydraulic power to clamp the coiled tubing 21 or keep the coiled tubing 21 in continuous operation.
Preferably, as shown in fig. 1 and 5, the utility model provides a control system of injector head clamping device, wherein, first speed acquisition device 4 includes first shaft coupling 41 and first encoder 42, and first encoder 42 is installed on the driven sprocket of the tight chain 11 of clamp of injector head clamping device 1 through a shaft coupling coaxial, and first encoder 42 converts the angular velocity (and the direction) of driven sprocket into the linear velocity (and the direction) of the tight chain 11 of clamp, and first encoder 42 is connected with controlling means electricity.
Preferably, as shown in fig. 1, 3 and 4, the utility model provides a control system for an injection head clamping device, wherein, the second speed collecting device 5 includes a friction wheel 51, an elastic pressing mechanism 52, a second coupling 53 and a second encoder 54, the second encoder 54 is coaxially connected with the friction wheel 51 through the second coupling 53, the elastic pressing mechanism 52 presses the wheel surface of the friction wheel 51 on the outer surface of the continuous tube 21, so as to ensure that the wheel surface of the friction wheel 51 is reliably contacted with the surface of the continuous tube 21, the continuous tube 21 drives the friction wheel 51 to rotate during the movement process, the second encoder 54 converts the rotation speed (and the rotation direction) of the friction wheel 51 into the linear speed (and the direction) of the continuous tube 21, and the second encoder 54 is electrically connected with the control device.
It should be noted that, in addition to the above-mentioned detection method by using the encoder in a contact manner, the running speed of the clamping chain 11 and the running speed of the continuous tube 21 may also be detected in real time by using a non-contact manner (ray, laser) to detect the direction and speed, which is not limited by the present invention.
Preferably, the control device can be a P L C control device or a special control device, the acquired signal can be a digital signal or an analog signal, the installation part can be positioned on the injection head or other parts of the continuous pipe 21 operation machine, in addition, a warning lamp 7 can be arranged to be electrically connected with the control device, and when the control device judges that the phenomenon of pipe slipping occurs, the warning lamp 7 is lightened, so that a worker can find and process the phenomenon in time.
As shown in fig. 6, the control process of the control system of the injector head clamping device provided by the present invention is as follows:
monitoring the running speed of the clamping chain 11 of the injection head clamping device 1;
monitoring the running speed of the continuous tube 21 on the guide 2 of the injection head;
comparing the running speed of the clamping chain 11 with the running speed of the continuous pipe 21, when the difference between the running speed of the clamping chain 11 and the running speed of the continuous pipe 21 is larger than a predetermined difference (specifically, when the running direction or speed of the clamping chain 11 is not consistent with the running direction or speed of the continuous pipe 21), determining that the pipe slipping phenomenon occurs, increasing the clamping force of the clamping chain 11 on the continuous pipe 21, and clamping and fixing the continuous pipe 21.
Further, as shown in fig. 7, monitoring the running speed of the clamping chain 11 of the injector head clamping device 1 comprises:
converting the angular velocity of the driven sprocket into the linear velocity of the clamping chain 11 of the injector head clamping device 1 by means of a first encoder 42 coaxially connected to the driven sprocket of the clamping chain 11;
and monitoring the running speed of the continuous tube 21 on the guide 2 of the injection head, comprising:
the rotational speed of the friction wheel 51 is converted to the linear speed of the continuous pipe 21 by a second encoder 54 coaxially mounted on the friction wheel 51 in frictional contact with the continuous pipe 21.
Compared with the prior art, the utility model has the advantages as follows:
the utility model provides a fill in first clamping device's control system can carry out real-time supervision and adjustment to fill in first clamping device's hydraulic clamping force to whether produce the elephant trunk to carry out real-time supervision to the coiled tubing, can fix the continuous pipe clamp fastening rapidly when detecting the emergence of the elephant trunk condition, prevent the enlargement of the elephant trunk condition.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.
Claims (11)
1. The control system of the injection head clamping device is characterized by comprising a first speed acquisition device, a second speed acquisition device and a control device;
the first speed acquisition device is connected with a clamping chain of the injection head clamping device and is used for monitoring and recording the running speed of the clamping chain;
the second speed acquisition device is connected with a guider of the injection head and is used for monitoring and recording the running speed of the continuous pipe moving along the guider;
the first speed acquisition device and the second speed acquisition device are respectively electrically connected with the control device, the control device is connected with the injection head clamping device through a control loop, and the control device adjusts the clamping force of the injection head clamping device on the coiled tubing through the control loop according to the running speed of the clamping chain and the running speed of the coiled tubing.
2. The control system of an injector head clamping device according to claim 1, wherein the injector head clamping device of the injector head comprises a plurality of sets of clamping assemblies, each set of clamping assemblies being arranged in parallel and each set of clamping assemblies being connected to the control circuit.
3. The control system of an injector head clamping device according to claim 2, wherein each group of the clamping assemblies comprises a first pressure cylinder, a second pressure cylinder, a first pipeline and a second pipeline, the first pressure cylinder is internally provided with a first chamber and a second chamber which are independent of each other, the second pressure cylinder is internally provided with a third chamber and a fourth chamber which are independent of each other, a first end of the first pipeline is respectively communicated with the first chamber and the fourth chamber through a tee joint, a first end of the second pipeline is respectively communicated with the second chamber and the third chamber through a tee joint, a second end of the first pipeline and a second end of the second pipeline are respectively communicated with the control circuit, and the clamping force of the injector head clamping device on the continuous pipe is increased under the state that the first pipeline pressurizes the first chamber and the fourth chamber, and under the state that the second pipeline pressurizes the second chamber and the third chamber, the clamping force of the injection head clamping device on the continuous pipe is reduced.
4. A control system for a injector head clamping device according to claim 3, wherein a clamp accumulator, a clamp pressure transmitter and a clamp pressure retaining valve are provided in sequence on the first conduit in a direction from the first end of the first conduit to the second end of the first conduit.
5. The control system of an injector head clamping device as claimed in claim 4, wherein the control circuit comprises a main control circuit, an emergency clamping control circuit and an emergency clamping control circuit, the main control circuit and the emergency clamping control circuit are connected with the power system, and the emergency clamping control circuit is connected with the booster pump.
6. The control system of an injection head clamping device according to claim 5, wherein the main control loop comprises a first main pipeline and a second main pipeline, one end of the first main pipeline is respectively communicated with the second end of the first pipeline of each group of the clamping assemblies, and faces a direction close to each clamping assembly, a pressure reducing valve, a clamping oil supply pressure transmitter and a clamping switching valve are sequentially arranged on the first main pipeline, one end of the second main pipeline is respectively communicated with the second end of the second pipeline of each clamping assembly, a main branch pipeline is arranged on the second main pipeline and is respectively communicated with the pressure reducing valve and the clamping switching valve, and the other end of the first main pipeline and the other end of the second main pipeline are respectively connected with the power system.
7. The control system of an injection head clamping device according to claim 5, wherein the emergency clamping control loop comprises a third main pipeline, one end of the third main pipeline is respectively communicated with the first pipelines of a plurality of groups of clamping assemblies through a plurality of emergency branch pipelines arranged in parallel, the communication position of each emergency branch pipeline and each corresponding first pipeline is located between the clamping pressure transmitter and the clamping pressure retaining valve on each first pipeline, the third main pipeline is sequentially provided with an emergency main check valve, an emergency accumulator and an electromagnetic valve in the direction close to each clamping assembly, and the other end of the third main pipeline is connected with the power system.
8. A control system for a injector head clamping device according to claim 7, wherein each emergency branch line is provided with an emergency branch check valve.
9. The control system of an injector head clamping device according to claim 5, wherein the emergency clamping control circuit comprises a fourth main pipeline, one end of the fourth main pipeline is respectively communicated with the second end of the first pipeline of each clamping assembly, the fourth main pipeline is sequentially provided with an emergency clamping supply valve and an emergency one-way valve in the direction close to each clamping assembly, and the other end of the fourth main pipeline is connected with the booster pump.
10. The injector head clamping device control system according to claim 1, wherein the first speed acquisition device comprises a first coupling and a first encoder, the first encoder being coaxially mounted on a driven sprocket of a clamping chain of the injector head clamping device by the first coupling, the first encoder being electrically connected to the control device.
11. The control system of an injection head clamping device according to claim 1, wherein the second speed collecting device comprises a friction wheel, an elastic pressing mechanism, a second coupler and a second encoder, the second encoder is coaxially connected with the friction wheel through the second coupler, the elastic pressing mechanism presses a wheel surface of the friction wheel onto the outer surface of the coiled tubing, the coiled tubing is driven to rotate during movement, and the second encoder is electrically connected with the control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921364675.9U CN210977355U (en) | 2019-08-21 | 2019-08-21 | Control system of injection head clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110500051A (en) * | 2019-08-21 | 2019-11-26 | 中国石油天然气集团有限公司 | A kind of control system and control method of injection head clamping device |
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Effective date of registration: 20230705 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Patentee after: CNPC JIANGHAN MACHINERY RESEARCH INSTITUTE Co.,Ltd. Patentee after: BEIJING PETROLEUM MACHINERY Co.,Ltd. Address before: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee before: CHINA NATIONAL PETROLEUM Corp. Patentee before: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Patentee before: CNPC JIANGHAN MACHINERY RESEARCH INSTITUTE Co.,Ltd. |