CN1987040B

CN1987040B - Synchronous control device for petroleum drilling rig derrick and base hydraulic lifting

Info

Publication number: CN1987040B
Application number: CN 200610022546
Authority: CN
Inventors: 杨世平; 任杰; 杨平
Original assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Current assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Priority date: 2006-12-20
Filing date: 2006-12-20
Publication date: 2013-03-27
Anticipated expiration: 2026-12-20
Also published as: CN1987040A

Abstract

The invention relates to a synchronous control device for petroleum drilling rig derrick and base hydraulic pressure, belonging to the petroleum drilling rig hydraulic pressure synchronous control device manufacturing technology field. The device applies a synchronizing motor closed-loop control method and designs a lifting device of petroleum drilling rig derrick and base hydraulic pressure used for bidirectional balance adjusting hydraulic pressure hydro-cylinder approach velocity, changes the present method of raising and dropping the derrick and base by using hoisting cable. The device comprises a bidirectional balance mechanism, synchronous closed-loop control mechanism and load-sensitive reversing control mechanism. The device is characterized in that: the device can realize the equal flow of each hydraulic oil in hydro-cylinder to form a closed-loop control, and the arranged bidirectional balance mechanism can control the derrick or dropping speed of the base and avoid topple and fall over the balance position; the device also can realize stepless speed variation and control easily, so that the weight of the derrick base is reduce and the assembling time is also shorten.

Description

Oil-well rig boring tower and base hydraulic lifting sync control device

Technical field: a kind of oil-well rig boring tower and base hydraulic lifting sync control device, be used for hoisting and transferring of oil-well rig boring tower and base, belong to the manufacturing technology field of oil-well rig hydraulic synchronization control device.

Background technology: the mode that present oil-well rig often adopts man-like shelf to wear big lifting rope hoists and transfers derrick and base, through using for many years proof both at home and abroad, adopts this mode of hoisting to have safe and reliable characteristics; Its shortcoming is: because the quality of man-like shelf is heavy, hoist rope only has one to act on the derrick, so need to bear larger pulling force during derrick lifting; Owing to be provided with driller house, man-like shelf and derrick at drilling floor surface, so table top is comparatively crowded, is unfavorable for the operation of derrick lifting; Because the extended distance on the base is larger, therefore the moment of torsion when hoisting is larger, may cause the base less stable in addition.

Summary of the invention: the present invention be directed to the above-mentioned shortcoming of prior art, adopt the mode of syncmotor closed-loop control, design a kind of Bidirectional balanced valve that has, and can realize petroleum rig base and the derrick hydraulic lift of automatic regulator solution compressing cylinder gait of march.

The present invention is achieved in that and the present invention includes bidirectional balanced valve system, synchronous closed-loop control mechanism and load-sensitive commutation controlling mechanism; Bidirectional balanced valve system is made of two derricks and two base rodless cavity equalizing valves, derrick rod chamber equalizing valve, the first one-way throttle valve and syncmotor loop overflow valves and derrick hydraulic cylinder rod chamber loop overflow valve, the rodless cavity equalizing valve of two derricks and two bases is separately positioned on the rodless cavity loop of two derricks and base hydraulic cylinder, be respectively applied to hoisting and transferring of two bases, two derricks, be provided with derrick rod chamber equalizing valve in the loop of two derrick hydraulic cylinder rod chambers; Be provided with displacement transducer at two base hydraulic oil cylinders and two derrick hydraulic jacks; Being provided with the derrick hydraulic cylinder in the rod chamber loop of two base hydraulic oil cylinders and two derrick hydraulic jacks has rods circuit overflow valve and base hydraulic cylinder that the rods circuit overflow valve is arranged, and hydraulic fluid port directly communicates with the hydraulic cylinder rod chamber; Closed-loop control mechanism comprises two syncmotors, syncmotor overflow valve, the first one-way throttle valve and draining reversal valve synchronously, and the draining reversal valve can be the draining reversal valve by electricity, liquid or gas control system; In order in the process of hoisting, to realize the derrick hydraulic jack displacement synchronous that hoists, make the displacement difference of each oil cylinder automatically maintain in the setting value, pipeline between syncmotor and equalizing valve is parallel with one-way throttle valve and draining reversal valve, the control circuit of draining reversal valve is connected with the PLC controller, accept the instruction of PLC controller, the oil return opening of draining reversal valve is connected with oil return pipe, and displacement transducer is connected with the PLC controller; But but both also manual reverse of direction of automatic reverse of the reversal valve of load-sensitive commutation controlling mechanism comprises first, second, and third reversal valve; The A of first reversal valve, B mouth connect syncmotor by the second one-way throttle valve, stretching of control derrick or base hydraulic oil cylinder, the A of second and the 3rd reversal valve, B mouth lead to respectively two bases or two derrick hydraulic cylinders by the second one-way throttle valve, the hydraulic jack of control base or derrick is parallel with the second one-way throttle valve and draining reversal valve on the pipeline between syncmotor and the equalizing valve separately; During derrick telescoping, the hydraulic oil that oil pump is got enters multi-way reversing mechanism, first reversal valve in the operation multi-way reversing mechanism, pressure oil enters the second one-way throttle valve and flows to syncmotor, by syncmotor the hydraulic oil average mark is made into the equalizing valve that two-way leads to two derrick hydraulic jacks; Enter the rodless cavity of two derrick hydraulic jacks from the first one way valve of equalizing valve, pressure oil is opened the equalizing valve on the rodless cavity loop simultaneously, and the oil return line of rod chamber is connected, and piston rod stretches out, and promotes derrick lifting; In derrick lifting or the process transferred, being arranged on displacement transducer on the derrick hydraulic jack is passed to the displacement information of each hydraulic jack and carries out displacement difference in the PLC controller relatively, the value of gained compares with the numerical value of setting again, surpass the situation of setting numerical value in case find displacement difference, the PLC controller is connected to connection the control circuit of larger one road draining reversal valve of displacement, make displacement larger lead up to draining reversal valve draining, slow down the speed of displacement larger a tunnel, make a road less speed of catching up with displacement of displacement, get back to the value of setting when the displacement error of oil cylinder after, displacement transducer is passed to the PLC controller with the information that obtains, the PLC controller can cut off the circuit of the draining reversal valve that is switched on automatically, make it close no longer draining, be concatenated to form the derrick lifting displacement control of closed loop with this; When derrick lifting also surpasses the equilbrium position of 90 degree to stand up position, the load meeting of derrick telescoping oil cylinder is negative load by positive and negative idling, at this moment the oil pressure of the rodless cavity of derrick hydraulic jack sharply descends, at this moment be arranged on the equalizing valve closing passage under the promotion of spring on the rod chamber, make rod chamber form the oil return line back pressure, this back pressure just can be held piston rod and do not pulled out by derrick and prevent that derrick from toppling over; After derrick lifting puts in place, stamp fixedly derrick of derrick pin, then change oil circuit, make hydraulic oil lead to the base hydraulic oil cylinder, hoist that base puts in place and fixing with same control mode.

Advantage of the present invention and beneficial effect are: the employing syncmotor can make the flow that enters each oil cylinder hydraulic oil equate, displacement transducer access PLC control system can feed back to the displacement information of each cylinder the PLC control system, forms closed-loop control; Because load feedback formula reversal valve is directly proportional with the displacement of spool in the certain situation under shed amount of pressure differential, the size of therefore controlling spool displacement can be controlled the speed of its oil cylinder, reaches the purpose of having controlled the speed of putting base, derrick; The Bidirectional balanced valve that arranges when derrick lifting puts in place and surpass 90 degree equilbrium position, or transfer derrick, when base balanced hydraulic oil cylinder bears negative load, control lowering velocity and prevent that derrick from surpassing the equilbrium position and toppling over and cause damage; The utlity model has and realize stepless speed regulation and hold manageable characteristics, also can significantly reduce the weight of derrick base, shorten the set-up time.

Description of drawings:

Fig. 1 is control loop schematic diagram of the present invention.

The specific embodiment: provide embodiments of the invention as an example of two base hydraulic cylinders and two derrick hydraulic cylinders example below in conjunction with accompanying drawing: the present invention includes bidirectional balanced valve system 9, synchronously closed-loop control mechanism 14 and load-sensitive commutation controlling mechanism 16; Bidirectional balanced valve system 9 is by two derricks and two base rodless cavity equalizing valves 6 and 24, two derrick rod chamber equalizing valves 10, the first one

way valve

11 and 12, syncmotor loop overflow valve 23, the derrick hydraulic cylinder has rods circuit overflow valve 2 and 8, displacement transducer 25 consists of, two derrick rodless cavity equalizing valves 6 and two base rodless cavity equalizing valves 24 are separately positioned on two derrick hydraulic jacks 5,7 and base hydraulic oil cylinder 1, on 3 the rodless cavity loop, two derrick rodless cavity equalizing valves 6 and two base rodless cavity equalizing valves 24 are respectively applied to the load of base and derrick balance derrick and base when transferring, be provided with derrick rod chamber equalizing valve 10 in the loop of two derrick hydraulic jack rod chambers, the backflow of rod chamber hydraulic oil when being used for derrick lifting, being provided with the derrick hydraulic cylinder in the rod chamber loop of two bases and two derrick hydraulic jacks has rods circuit overflow valve 2 and 8, is provided with displacement transducer 25 at two base hydraulic oil cylinders and two derrick hydraulic jacks; Synchronously closed-loop control mechanism 14 comprises two syncmotors 22, syncmotor loop overflow valve 23, the first one

way valve

11,12 and two draining

reversal valves

20 and 13, be parallel with the first one-

way throttle valve

11,12 and draining

reversal valve

13 and 20 on the pipeline between syncmotor 22 and the equalizing valve 6, draining reversal valve 13 is connected with PLC controller 4 with the control circuit of being connected, accept the instruction of PLC controller 4, draining reversal valve 13 is connected with oil return pipe 19 with the oil return opening of being connected, and displacement transducer 25 is connected with PLC controller 4; Load-sensitive commutation controlling mechanism 16 comprises first reversal valve 17 and second, the 3rd reversal valve 15, but but both also manual reverse of direction of automatic reverse, control, put the speed of service of commutation and control hydraulic jack, the A of first reversal valve 17, B mouth link to each other with syncmotor 22 by the second one way valve 21; The A of second, third sheet reversal valve, B mouth lead to respectively base or derrick hydraulic jack by the first one

way valve

11 and 12; During derrick telescoping, the hydraulic oil that oil pump 18 is got enters load-sensitive commutation controlling mechanism 16, operation first reversal valve 17, make pressure oil flow to syncmotor 22 by the second one way valve 21, by syncmotor 22 the hydraulic oil average mark is made into the equalizing valve 6 that two-way leads to two derrick hydraulic jacks; Enter the rodless cavity of two derrick hydraulic jacks 5 and 7 from the first one way valve of equalizing valve 6, pressure oil is opened the equalizing valve 10 on the rod chamber loop simultaneously, and the drainback passage of rod chamber is connected, and piston rod stretches out, and promotes derrick lifting; In derrick lifting or the process transferred, being arranged on displacement transducer 25 on the derrick hydraulic jack is passed to the displacement information of each road hydraulic jack and carries out displacement difference in the PLC controller 4 relatively, the value of gained compares with the numerical value of setting again, surpass the situation of setting numerical value in case find displacement difference, PLC controller 4 is connected to connection the control circuit of larger one road draining reversal valve 13 of displacement or 20, make draining reversal valve commutation draining, slow down the speed of displacement larger a tunnel, make displacement less a road catch up with the speed of service, get back to the value of setting when the displacement error of two oil cylinders after, displacement transducer 25 is passed to PLC controller 4 with the information that obtains, the draining reversal valve 13 that the automatic cut-out of PLC controller 4 meetings is switched on or 20 control circuit, make it close no longer draining, be concatenated to form the derrick lifting displacement control of closed loop with this; When derrick lifting also surpasses the equilbrium position of 90 degree to stand up position, the load meeting of derrick lifting oil cylinder is negative load by positive and negative idling, at this moment the oil pressure of the rodless cavity of derrick hydraulic jack sharply descends, at this moment be arranged on equalizing valve 10 on the rod chamber and under the promotion of spring, close the asphalt channel of rod chamber, make rod chamber form the oil return line back pressure, this back pressure just can be held piston rod and do not pulled out by derrick, prevent that derrick from toppling over, after derrick lifting puts in place, stamp fixedly derrick of derrick pin, then change oil circuit, make hydraulic oil lead to the base hydraulic oil cylinder, same control mode hoists that base puts in place and is fixing; In the derrick telescoping process, if be connected to the unexpected stuck or obstruction of two equalizing valve 10 spools of hydraulic jack rod chamber, the hydraulic oil of hydraulic jack 5 or 7 rod chambers just can not reflux, pressure will sharply rise, make hydraulic jack 5 or 7 that plastic strain occur, and therefore cause the accident, for fear of the accident, the overflow valve 8 that is arranged on hydraulic jack 5 and the 7 rod chamber loops also boosts simultaneously, when pressure reaches the oil pressure relief of setting, overflow valve 8 is opened release, and reports to the police, and prevents that cylinder barrel from swelling and having an accident; When PLC controller 4 cisco unity malfunction, in order to guarantee hoisting or transferring and to continue of derrick and base, at this moment can use second, the 3rd reversal valve 15 of manual operation, under artificial control, continue to adjust the flexible of two derrick hydraulic jacks 5 and 7 or two base hydraulic oil cylinders 1 and 3, finish hoisting or transferring of derrick and base; The first reversal valve 17 that arranges and second, the 3rd reversal valve 15 are in the situation that pressure is certain, its flow is directly proportional with the displacement of spool, therefore as long as the size of control spool displacement just can be controlled the size of flow, thereby the speed of service of control hydraulic jack, finally reach and controlled speed, the displacement of putting base, derrick, make its operation more steady.

Claims

1. an oil-well rig boring tower and base hydraulic lifting sync control device comprise bidirectional balanced valve system, synchronously closed-loop control mechanism and load-sensitive commutation controlling mechanism, it is characterized in that:

A. described bidirectional balanced valve system is by two derricks and two base rodless cavity equalizing valves, two derrick rod chamber equalizing valves, the first one-way throttle valve, syncmotor loop overflow valve and derrick hydraulic cylinder rod chamber loop overflow valve, displacement transducer consists of, two derricks and two base rodless cavity equalizing valves are separately positioned on the rodless cavity loop of two derricks and two base hydraulic oil cylinders, be provided with derrick rod chamber equalizing valve in the loop of two derrick hydraulic jack rod chambers, be provided with displacement transducer at two base hydraulic oil cylinders and two derrick hydraulic jacks, be provided with derrick hydraulic cylinder rod chamber loop overflow valve and base hydraulic cylinder rod chamber loop overflow valve in the rod chamber loop of two bases and two derrick hydraulic cylinders;

B. described synchronous closed-loop control mechanism comprises two syncmotors, syncmotor loop overflow valve, the first one-way throttle valve and draining reversal valve, the control circuit of draining reversal valve is connected with the PLC controller, the oil return opening of draining reversal valve is connected with oil return pipe, and displacement transducer is connected with the PLC controller;

C. described load-sensitive commutation controlling mechanism comprises first, second, and third reversal valve, the A of first reversal valve, B mouth link to each other with syncmotor by the second one-way throttle valve, the A of second, third sheet reversal valve, B mouth lead to respectively two bases or two derrick hydraulic jacks by the first one-way throttle valve, are parallel with the second one-way throttle valve and draining reversal valve on the pipeline between syncmotor and the equalizing valve.