Control system hydraulic drilling rig

 

The invention relates to the operation of drilling equipment, and in particular to control systems hydraulic drilling rig. The technical result is to expand the functionality of the system by regulating the pressure charging of the batteries and energy recovery at reduced power pumps. To achieve the technical result the system includes a rotor and a lifting mechanism with a power cylinder connected via the switchgear line control, fitted with a valve OR with a power supply, made in the form of pumps and accumulators. The first inlet valve OR connected to the battery, and the output from the rotor and lifting mechanism. The system is equipped with drilling key, wedge grip, crane, connected via switchgear control lines with the valve outlet OR power source is supplied by a source of compressed gas, made in the form gatherplace suspension (s), and batteries made pneumohydraulic, and the gas cavity of the plungers are connected through check valves and associated with gas cavities batteries, and hydraulic - pumps. If this is tallicheskie switchgears, and the second valve inlet OR through additional hydraulic valve communicated with the line of the highest pressure of one of the batteries or one of the displacers. 2 C.p. f-crystals, 3 ill.

The invention relates to the operation of drilling equipment, and in particular to control systems hydraulic drilling rig.

Known hydraulic control system for drilling equipment, including hydraulic cylinders, the pump, the hydraulic control device (see A. A. Glanz, B. C. Alekseev. Handbook mechanics of exploration. - M.: Nedra", 1987, page 86).

The known system does not allow you to accumulate energy, and therefore, to maintain the required operating pressure in the system require pumps respective performance.

Known control system hydraulic drilling installation comprising a rotor and a lifting mechanism with a power cylinder connected via the switchgear line control, fitted with a valve OR with a power supply, made in the form of pumps and accumulators, the first inlet valve OR connected to the battery, and the output from the rotor and the lifting mechanism (see the description of the invented is Alenia charging of the battery.

The technical object of the present invention is to expand the functionality of the control system by regulating the pressure charging of the batteries and energy recovery without increasing the capacity of the pumps.

The technical result is achieved that the control system hydraulic drilling installation comprising a rotor and a lifting mechanism with a power cylinder connected via the switchgear line control, fitted with a valve OR with a power supply, made in the form of pumps and accumulators, the first inlet valve OR connected to the battery, and the output from the rotor and lifting mechanism, according to the invention, the system is equipped with drilling key, wedge grip, crane, connected via switchgear control lines with the valve outlet OR power source is supplied by a source of compressed gas, made in the form of gatherplace suspension (s), and batteries made pneumohydraulic, and the gas cavity of the plungers are connected through check valves and associated with gas cavities batteries, and hydraulic - pump, with gas and hydraulic Polesye devices and the second valve inlet OR through additional hydraulic valve communicated with the line of the highest pressure of one of the batteries or one of the displacers.

The power cylinder of the lifting mechanism is connected to the power source through a hydraulic lock double acting, the inputs of which are connected, respectively, with the working cavity of the power cylinder through the check valve from the power source, outputs respectively with the drain line and the working cavity.

The power cylinder of the lifting mechanism is provided with an additional valve, one end of which is directly connected with the working cavity of the power cylinder and the other via the pressure reducing valve.

The proposed control system can operate in manual mode (operation electrohydraulic remote control) and automatic (when equipped with pressure sensors, the position and the microprocessor).

The system allows for low power pumps to obtain the necessary for the operation of the rotor, the lifting mechanism with the power cylinder, drilling key, wedge gripper manipulator flow and pressure are offline, without communication with an external gas source.

The system allows nakapila is her duty (when lifting).

In Fig. 1 presents the principal hydraulic scheme of the rig of Fig. 2 - slice system control the operation of the lifting mechanism with hydraulic lock of Fig.3 - same with the reducing valve.

Control system hydraulic drilling rig includes a rotor 1, the lifting mechanism 2 with the power cylinder, drill key 3, the V-grip 4, the hydraulic crane 5, United through distribution mechanisms 6, 7, 8, 9, 10, accordingly, line 11 control power source. The power source includes a pump 12 and 13, a pneumatic accumulators 14, 15. 16 and the source of compressed gas. A source of compressed gas is made in the form of three plungers 17, 18, 19. Hydraulic cavity of the batteries 14, 15, 16 and plungers 17, 18, 19 is equipped with a hydraulic distribution devices 20, 21, 22 and 23, 24, 25, and the gas cavity - gas distribution devices 26, 27, 28 and 29, 30, 31, respectively. The gas cavity of the plungers 17, 18, 19 are connected through check valves 32 and 33. Line 11 control system provided with a valve 34 OR, one input of which is communicated with the batteries 14, 15, 16, and the other via the auxiliary valve 35 with the control line high pressure (or the battery the power cylinder, drilling key 3, wedge grip 4 and the manipulator 5.

The working volume of the cylinder of the lifting mechanism 1 (see Fig.2) connect with a power source through a check valve 36 and the locking valve cut 37 double-sided or via an additional valve 38 and the pressure reducing valve 39 (see Fig.3).

In Fig.2 the power cylinder of the lifting mechanism 1 is connected to the power source through a hydraulic lock 37 bilateral actions, the inputs of which are connected, respectively, with the working cavity of the power cylinder through the check valve 36 with a power source, and the corresponding outputs from the drain line and the working cavity.

In Fig.3 one additional output of the distributor 38 is directly connected with the working cavity of the power cylinder of the lifting mechanism 1, and the other via the pressure reducing valve 39.

The control system operates as follows.

When preparing the system for use gas under pressure is injected from a gas pipeline or cylinder in the gas cavity of the batteries 14, 13, 16 and plungers 17, 18, 19 through the gas distribution device 26, 27, 28 and 29, 30, 31, respectively. At the beginning of the drilling length of the drill pipes is negligible, so that the working pressure in the system is low and pistons of vytesnitelya 17, 18, 19 fill in from pump 12 and 13 through the open hydraulic distribution device 20, 21, 22 and 23, 24, 25, respectively.

To ensure the necessary high pressure gas source, namely the plungers 17, 18, 19, additional gas pressure pumps 12 and 13 (from the pipeline or cylinder) with open gas distribution devices 23, 24, 25, 29 and closed- 30, 31, 26, 27, 28, 35. The gas from separator 17 through the check valve 32 is supplied to the displacer 18 and from the latter through the check valve 33 in the displacer 19, whereupon the gas pressure in the displacer 19 has a maximum value.

About 20% of the time during operation of the drilling rig is the operation of the lifting mechanism 1, for the making of which is consumed 80% power, with the remaining 80% of the time is spent on the other actuators, namely the drilling of the key 3, the rotor 1, V-grip 4, the manipulator 5, which do not require maximum power.

Working pressure necessary for operation of the rotor 1, the lifting mechanism 2 with the power cylinder, drilling key 3, V-grip 4, the manipulator 5 is supported in line 11 of the pump control 12 and 13 through the open switchgear 6, 7, 8, 9, 10, accordingly the hydraulic distribution devices 20, 21, 22.

Depending on the required output pressure can be maintained simultaneously by two batteries 15, 16 through devices 21 and 22 and the valve 34 OR, in the battery 14 is stored maximum.

When the lifting mechanism 2, when you need maximum power, the fluid in line 11, the control system is fed from the pumps 12 and 13 and/or accumulators 14, 15, 16.

During operation of the drilling key 3, the rotor 1, V-grip 4 and the manipulator 5 of the fluid from the pumps 12 and 13 along the line 11 of the control system enters the distribution device or 7, or 8, or 9, or 10, respectively, and a portion injected into the battery 14, 13, 16, with an additional valve 35 is closed.

Increasing the length of the column, and hence its weight, increase the operating pressure in the line 11 to the control system, pumping gas from the displacer or 17, or 18, or 19 through the open gas distribution device or 29 or 30 or 31 in the gas cavity of the batteries 14, 15, 16 through the open gas distribution device 26, 27, 28, respectively, depending on the required quantity, increasing the pressure refueling and support the working pressure corresponding to the weight of the column.

When umulation 14, 13, 16 plungers 17, 18, 19 and periodically dumping fluid from the plungers 17, 18, 19 through devices 23, 24, 25. The batteries 14, 13, 16 refuel fluid supplied by the pumps 12 and 13 through the hydraulic distribution device 20, 21, 22, respectively. Thus, when the lifting mechanism 2, the pressure in the gas cavity of the batteries 14, 15, 16 is controlled in accordance with the weight of the column and the pumps 12 and 13 are constantly having less power.

During the descent of the column when the pressure in the working cavity of the cylinder 36 of the lifting mechanism 2 is less than the pressure in the line 11 to the control system, the working fluid from the cavity through the locking valve cut 37 is supplied on the drain.

With the increase in the weight of the column when the pressure in the working cavity of the cylinder 36 more pressure in the line 11 to the control system, locking valve cut 37 is switched to the left position and the liquid flows in line 11 of the control system and further to the liquid cavity of the batteries 14, 13, 16, donapaula the latter, i.e., is the accumulation of energy for other actuators.

At round-trip operations, namely in the work of the wedge gripper 4, when pressure in the battery 15, 16 is not enough, an additional valve 35 and itcosts 19 or battery 14).

When installing the pressure reducing valve 38, the working cavity of the cylinder of the lifting mechanism 2 is directly connected to the valve 6 during the ascent and descent of the column, while drilling the pressure reducing valve 38, providing a constant pressure.

Claims

1. Control system hydraulic drilling installation comprising a rotor and a lifting mechanism with a power cylinder connected via the switchgear line control, fitted with a valve OR with a power supply, made in the form of pumps and accumulators, the first inlet valve OR connected to the battery, and the output rotor and the lifting mechanism, wherein the system includes drilling key, wedge grip, crane, connected via switchgear control lines with the valve outlet OR power source is supplied by a source of compressed gas, made in the form gatherplace of plungers, batteries made pneumohydraulic, and the gas cavity of the plungers are connected through check valves and associated with gas cavities batteries, and hydraulic - pump, with gas and hydraulic the separating device, and the second valve inlet OR through additional hydraulic valve communicated with the line of the highest pressure of one of the batteries or one of the displacers.

2. Control system under item 1, characterized in that the power cylinder lifting mechanism is connected to the power source through a hydraulic lock double acting, the inputs of which are connected respectively with the working cavity of the power cylinder through the check valve from the power source, outputs respectively with the drain line and the working cavity.

3. Control system under item 1, characterized in that the power cylinder lifting mechanism is provided with an additional valve, one end of which is directly connected with the working cavity of the power cylinder and the other via the pressure reducing valve.

 

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