SU791953A1 - Device for controlling running operations in drillrigs - Google Patents

Description

co-lifting operations, a containing control unit, including a tool descent unit CKOt-OCTM and an electromagnetic brake excitation current controller, an electromagnetic brake excitation winding and a speed feedback generator, are introduced. in addition to the switching unit, the wedge locking position control unit , control unit for tire-pneumatic clutches, control unit for positioning the drive of the band brake and the indicator of the state of the mud pumps, one of the outputs of the indicator of the state of the pump pumps connected to the input of the regulator of the excitation current of the electromagnetic brake, and the other output to one of the inputs of the instrument descent speed setting unit, the other two inputs of which are connected respectively to the output of the tachogenerator, speed feedback and the output of the control unit for the drive of the braking drive, at the same time, one of the inputs of the switching unit is connected to the control unit of the smart pneumatic

clutches, another input - to the control unit

the position of the wedge grip, and the output of the switching unit is connected to the input of the control unit, the output of which is connected to the excitation winding of the electromagnetic brake.

The drawing shows a block diagram of the proposed device for controlling sousco-lifting operations on drilling rigs.

The device contains a thyristor control unit 1 of an electromagnetic powder brake with a block 2 setting the tool descent speed with a tachogenerator 3 feedback on the speed of the tool descending and regulator 4 of the excitation current of the electromagnetic powder brake 5. Additionally, the switching unit 6 is installed, block 7 controlling the position of the wedge grip 8 and block 9 of the control of tire-pneumatic clutches 10 of the winch drive. I. At the same time, one of the inputs of the switching unit 6 is connected to the output of the control 9 unit of tire-pneumatic couplings, and the other input to the block 7 of the counter position of the wedge grip. The output of the switching unit 6 is connected to the control unit 1. At one of the inputs of the unit 2 of the tool descent speed setting, a speed feedback signal is sent from the tachogenerator 3, to the other - from the position control drive unit 12 of the 13 belt brake 14, In the drive of mud pumps or In the drilling fluid circulation system, a signalizer of the 15 state of drilling .ijacos is installed, the output of which is connected to the third input of the unit 2 of the descent speed of the tool, LrugoL, the output of the conditioner of the drilling drill 15

The pumps are connected to the input of the field current controller in the winding 16 of the electromagnetic powder brake 5.

The operation of the device is as follows.

In the process of lowering the tool, the electromagnetic brake 5 operates in one I

Braking or nomin of modes

Demagnetization. The latter mode is used when descending and lifting an empty elevator. Switches in the circuit required for transferring the brake to one of the indicated modes are performed by the switching unit 6, which is controlled by the signals from the wedge grip positioning units 7 and the tire-pneumatic drive winch control unit 9. Braking is activated only if the wedge the grip 8 is raised, and the tire-pneumatic clutch 10 of the drive of the winch 11 is disconnected. During the instrument descent, the speed feedback from the tachogenerator 3 operates, which maintains the automatically set speed down. The signals from block 12 of the position control of the actuator 13 of the band brake 14 supplied to the block 2 of the speed settings provide changes in the setpoint of the set descent speed depending on the position of the actuator 13. Position sensors (for example, limit switches) are installed in block 12 so that when fully folded The drive 13 actuated the sensor, which included the maximum speed of descent. When the actuator handle 13 is moved downwards, the other sensors of the block 12 alternately trigger and the set point of the descent speed decreases,

At the beginning of the contact of the TOE EZNYY tapes with brake pulleys, the minimum setpoint speed is turned on. When turning on the winch drive to lift simultaneously with. switching on the tire-pneumatic clutches 10 signal from block 9 (G arriving at the switching unit b, transfers the brake to work in re-demagnetization

Wherein

Claims (2)

the residual moment of the brake is minimal. When switching from tripping to drilling at the moment the drill pumps are turned on, the signal transmitter 15 closes the circuit of the brake excitation regulator 4, and the current reaches the preset value in accordance with the tool weight. As the weight increases, a smooth adjustment of the excitation current in the winding is made. 16 by the regulator 4, After disabling the drilling sump, the detector 15 breaks the circuit of the regulator 4, thereby eliminating the need to output the current regulator 4 to the zero position and back again when going from drilling to descent. Another signal (contact) of the detector 15 is introduced into the chain of the unit 2 for setting the descent speed so that when the mud pumps are switched on, the minimum possible speed of descent is switched on. This rotational speed coupling is effective when drilling and operating an electromagnetic powder brake as a bit feed adjuster, which improves the accuracy of maintaining the load on the bit. The use of the launch control device improves productivity. A decrease in the number of control bodies leads to a decrease in the number of operator-initiated switchings and to a reduction in the cycle time for one candle to descend. Automation of the control process eliminates the possibility of erroneous operations, which increases the reliability and durability of the brake with a corresponding reduction in repair costs. Redistributing the load between the main belt and auxiliary electromagnetic brakes, making more use of the possibilities of the electromagnetic brake, reduces the amount of effort that the driller must apply to the handle of the belt brake, and greatly simplifies his work environment. Claims An apparatus for controlling tripping operations on drilling rigs, comprising a control unit, including a tool descent speed setting unit and an electromagnetic brake field current regulator, an electromagnetic brake field winding and a feedback tachogenerator, characterized in that increasing the performance of tripping operations; it is equipped with a switching unit, a tire-pneumatic clutch control unit, a wedge grip position control unit. the counter position control unit of the mosaic belt torus drive and the state of the drill pump status indicator, with one of the outputs of the state pump of the state of the drilling pumps connected to the input of the electromagnetic brake excitation current regulator and the other output to one of the inputs of the tool lowering speed setting unit, the other two inputs of which are connected respectively to the output of the tachogenerator feedback in speed and to the height of the unit for controlling the position of the drive of the band brake, one of the inputs of the switching unit connecting It is connected to the output of the control unit of tire-pneumatic couplings, the other input is to the control unit of the position of the wedge grip, and the output of the combi-mutating unit is connected to the input of the control unit, the output of which is connected to the excitation winding of the electromagnetic brake. Sources of information taken into account in the examination 1. A. A. Koshcheev and others. Handbook of the electrician of drilling rigs. M., Nedra, 1974. 2. Machines and oil equipment, 9, M., 1976.