CN2078367U - Torque-limiting device by button-up on liquid-gas large pincers - Google Patents

Abstract

The utility model provides a torque limiting device of liquid gas tongs upper buckle for the liquid gas tongs low fender upper buckle operation in the oil natural well drilling process. The torque limiting device comprises a pneumatic reversing valve, an electromagnetic reversing valve, an electric contact pressure meter, an intermediate relay, a pressure meter, a spill valve and a pressure retaining valve. One end of the liquid gas tongs is connected with the gas supply, and the other end of the liquid gas tongs is connected with the hydraulic oil pipe line from a pump station. When the liquid gas tongs is buckled through the fender upper, the gas pipe line, the oil pipe line and the power of a connection device make use of the optimum upper buckle torque pressure according to the need of different drills to control the upper buckle torque pressure through a protect action of an amplifying circuit, so the pneumatic reversing valve can prevent the torque upper buckle from damaging the drill.

Description

Torque-limiting device by button-up on liquid-gas large pincers

The utility model relates in a kind of Process of Oil Well Drilling, is used for the device of the liquid gas tong restriction torque wrench moment of drilling tool, shackle operation.

Present most popular liquid gas tong is a kind ofly to control with compressed air, be used as power with hydraulic oil, as on the drilling tool, unload the Power Tong of screw thread, be applicable on the drilling tool of different sizes such as ", 4 1/2 " commonly used 3 1/2 in the drilling process, 5 ", 7 ", the shackle operation.When detaining on this liquid gas tong, the tong manual only illustrates and adopts high-grade operation, make the moment of torsion pressure limit in the 10MPa scope of tong regulation.Because the drilling tool that tong is held tightly during last the button is not necessarily straight, the drilling tool screw thread can not be very clean, factors such as the equipment operation is also not necessarily very flexible, so with detaining on the high gear, the frictional resistance of drilling tool screw thread is big, the rotating speed of high gear is slowed down, and impact force reduces, thereby drilling tool does not reach the torque wrench moment value of requirement.Like this, operating personnel often use instead to link on the low gear and connect drilling tool, carry out operation with the low gear pressure of observing tong upward pressure table.But, because the reversal valve of liquid gas tong is subjected to multiple factor affecting not necessarily very flexible, and the sealing that is connected of drilling tool and drilling tool is by the shoulder sealing, and during institute above button in shoulder one contact of two drilling tools, the 10MPa that moment of torsion pressure can rise to the tong maximum once is buckle press upward.Because commonly used 3 1/2 ", 4 1/2 ", 5 ", 7 " etc. several drilling tools best torque wrench moment pressure all be defined in below the 7.5MPa, the torque wrench moment that has so just surpassed drilling tool, cause button on the super moment of torsion and damage tool joint, joint is scrapped, increase the repair amount of drilling tool, cause economic loss.

The purpose of this utility model just provides the device of torque limiting when detaining on a kind of liquid gas tong.It can be when operating personnel do to detain operation on the drilling tool with low gear; according to desired torque wrench moments such as the different size of various drilling tools, different grade of steel, different button-type, different hydrophthalmia sizes; regulate control torque wrench moment pressure; prevent the accident of detaining on the super moment of torsion; to reach the protection tool joint, prolong the drilling tool purpose in application life.

The purpose of this utility model realizes as follows: when operating personnel use the low gear of liquid gas tong to go up the button operation, the reversal valve of source of the gas is shifted onto on the low gear, make the spool of the compressed air promotion rapid-release valve of source of the gas block exhaust opening, when compressed air enters tong low speed air bag, connect and a knob valve control by a pipeline, compressed air is imported this device simultaneously.The Pneumatic reversal valve of compressed air access to plant; promote the cylinder piston motion of valve; make the valve commutation connect the hydraulic circuit of pumping plant; pressure meter demonstrates the pressure of detaining on the tong low gear; after the electro connecting pressure gauge energising simultaneously; under the protective effect of the amplifying circuit of forming by two auxiliary reclays; when torque wrench moment constantly rises; when being raised on the drilling tool that electro connecting pressure gauge sets up button best torque pressure; make the solenoid operated directional valve energising; its coil produces adhesive and promotes the valve commutation, opens the oil return opening release.The pressure meter of while finder, the manual adjustments choke valve makes pressure remain on the best torque force value.Like this, liquid gas tong just can not produce on the super moment of torsion and detain, thereby reaches the purpose of effective control torque wrench moment, prevents that super moment of torsion from damaging the accident generation of drilling tool.

The utility model is installed simple, and is easy to operate, effective, safe and reliable, with low cost.As the gas circuit and the power supply of shearing device, to the shackle of liquid gas tong or still with on the high gear button operation all do not have influence.

Below in conjunction with the performance of accompanying drawing detailed description according to the liquid gas tong torque wrench moment restraint device that the utility model proposes.

Fig. 1 is a liquid gas tong torque wrench moment restraint device schematic diagram.

As shown in the figure, the utility model is by gas circuit pipeline ［ 1 ］, knob valve ［ 2 ］, Pneumatic reversal valve ［ 3 ］, pipeline ［ 4 ］, overflow valve ［ 5 ］, pressure meter ［ 6 ］, electro connecting pressure gauge ［ 7 ］ and two auxiliary reclays ［ 8 ］, ［ 9 ］, and solenoid operated directional valve ［ 10 ］, choke valve ［ 11 ］, oil circuit pipeline ［ 12 ］, stop valve ［ 13 ］ are formed.On the gas circuit that the rapid-release valve ［ 14 ］ that the air inlet port of Pneumatic reversal valve ［ 3 ］ is connected liquid gas tong by gas circuit pipeline ［ 1 ］ and knob valve ［ 2 ］ and low speed air bag ［ 15 ］ link, the oil-in of the oil-in of Pneumatic reversal valve ［ 3 ］ and solenoid operated directional valve ［ 10 ］ is connected pumping plant ［ 17 ］ by oil circuit pipeline ［ 12 ］ and stop valve ［ 13 ］ and transports on the hydraulic oil oil pipe ［ 18 ］ of liquid gas tong.Pressure meter ［ 6 ］, electro connecting pressure gauge ［ 7 ］, overflow valve ［ 5 ］ all are connected on the pipeline ［ 4 ］, and join with the working hole of Pneumatic reversal valve ［ 3 ］.Electro connecting pressure gauge ［ 7 ］ connects with the circuit of solenoid operated directional valve ［ 10 ］, has passed through to be linked by the amplification holding circuit that auxiliary reclay ［ 8 ］ and auxiliary reclay ［ 9 ］ are formed.The oil return opening of solenoid operated directional valve ［ 10 ］ also is equipped with a choke valve ［ 11 ］ that can play the pressurize effect.

When operating personnel use the low gear of liquid gas tong to carry out detaining operation on the drilling tool, press knob valve ［ 2 ］ and connect gas circuit, at the compressed air of the source of the gas ［ 16 ］ of liquid gas tong when rapid-release valve ［ 14 ］ enters low speed air bag ［ 15 ］, the compressed air of source of the gas ［ 16 ］ is again by gas circuit pipeline ［ 1 ］, knob valve ［ 2 ］ enters the cylinder of Pneumatic reversal valve ［ 3 ］, promote piston motion and make the valve commutation, former working hole of Pneumatic reversal valve ［ 3 ］ and oil return opening are linked become working hole and be connected with oil-in, thereby connect the hydraulic circuit that comes by pumping plant ［ 17 ］, hydraulic oil also has been passed to the oil-in of solenoid operated directional valve ［ 10 ］ simultaneously, and the solenoid operated directional valve ［ 10 ］ of this moment is not opened as yet.The hydraulic oil of device is when transporting to liquid gas tong by the hydraulic oil of pumping plant ［ 17 ］, process stop valve ［ 13 ］ (normally open is just closed when turnaround of unit), oil circuit pipeline ［ 12 ］ input unit.After Pneumatic reversal valve ［ 3 ］ is connected oil circuit, at this moment pressure meter ［ 6 ］ is read the torque wrench moment pressure of liquid gas tong, can regulate pressure arbitrarily according to the desired different torque wrench moment force value of different drilling tools with the electro connecting pressure gauge ［ 7 ］ of pressure meter ［ 6 ］ and connection.So, before the operation of last button, the upper limit pointer ［ 7 of electro connecting pressure gauge ［ 7 ］ ²Transfer at best torque wrench moment force value, lower limit pointer ［ 7 ³Transfer position 0.Connect power supply during device work, the pressure pointer ［ 7 of electro connecting pressure gauge this moment ［ 7 ］ ¹Be and lower limit pointer ［ 7 ³Contact, electric current is through pressure pointer ［ 7 ¹, lower limit pointer ［ 7 ³Lead to auxiliary reclay ［ 9 ］, make its coil adhesive, its constant close contact ［ 9 ¹Disconnect, solenoid operated directional valve at this moment ［ 10 ］ is not switched on.When liquid gas tong began to go up button, the pressure of pressure meter ［ 6 ］ and electro connecting pressure gauge ［ 7 ］ rose simultaneously, and electricity connects the pressure pointer ［ 7 of pressure meter point ［ 7 ］ ¹Leave lower limit pointer ［ 7 ³, the coil blackout of auxiliary reclay ［ 9 ］, its constant close contact ［ 9 ¹Reset.Torque wrench moment pressure continues to rise, in case pressure pointer ［ 7 ¹And upper limit pointer ［ 7 ²When contacting, electric current is again through pressure pointer ［ 7 ¹, upper limit pointer ［ 7 ²And the constant close contact ［ 8 of auxiliary reclay ［ 8 ］ ³, the constant close contact ［ 9 of auxiliary reclay ［ 9 ］ ¹The coil electricity adhesive that enters auxiliary reclay ［ 8 ］, make two constant open contacts ［ 8 of relay ［ 8 ］ in the middle of it ¹, ［ 8 ²Closed simultaneously.At this moment solenoid operated directional valve ［ 10 ］ is connected power supply, energising produces adhesive and promotes the valve commutation, the oil-in and the oil return opening of solenoid operated directional valve ［ 10 ］ are connected, solenoid operated directional valve ［ 10 ］ is opened release behind the oil return opening, meanwhile observe the torque wrench moment pressure that pressure meter ［ 6 ］ shows, adjusting is installed in the choke valve ［ 11 ］ on the oil return pipe of Elactro magnetic commutator ［ 10 ］, makes the force value on the pressure meter ［ 6 ］ be stabilized in the desired torque wrench moment force value of drilling tool.Like this, the button operation just no longer produces super moment of torsion on the liquid gas tong, and reaches desired torque value.

Together be connected the auxiliary overflow that overflow valve ［ 5 ］ on the pipeline ［ 4 ］ is mainly used in this device with pressure meter ［ 6 ］, electro connecting pressure gauge ［ 7 ］, the pressure that the oil pressure relief that overflow valve ［ 5 ］ is set up is set up a little more than electro connecting pressure gauge ［ 7 ］.Like this, in case the circuit of device breaks down, overflow valve ［ 5 ］ will be in the pressure underflow stream of setting up, thereby the super moment of torsion of restriction is protected drilling tool.

After linking closely on the drilling tool torque value on request, operating personnel move the reversal valve of the source of the gas ［ 16 ］ on the liquid gas tong, the exhaust opening of rapid-release valve ［ 14 ］ is opened, the Pneumatic reversal valve ［ 3 ］ of device resets, the working hole of Pneumatic reversal valve ［ 3 ］ disconnects with oil-in and connects with oil return opening, and pressure descends.The pressure pointer ［ 7 of electro connecting pressure gauge ［ 7 ］ ¹Drop to 0, with lower limit pointer ［ 7 ³Contact, the coil blackout of auxiliary reclay ［ 8 ］ makes two constant open contact ［ 8 ¹, ［ 8 ²Reset simultaneously, cutting off the power supply of solenoid operated directional valve ［ 10 ］, solenoid operated directional valve ［ 10 ］ resets and cuts off its oil return opening.At this moment, operating personnel can handle the reversal valve of liquid gas tong, aim at the breach of tong, unclamp the drilling tool of holding tightly and withdraw from tong, finish and once go up the button operation.With detaining on a kind of drilling tool, when this device was only detained on the first time, the adjusting of making a torque limited got final product.

This device only is used for detaining operation on the low gear of liquid gas tong, detains if still use on the high gear, and this device is inoperative.When tong carries out the shackle operation with low gear, mention the gas circuit that knob valve ［ 2 ］ cuts off access to plant, device can not worked.When this device needs maintenance, mention knob valve ［ 2 ］ and cut off gas circuit, close stop valve ［ 13 ］ and cut off oil circuit, cut off the electricity supply, can carry out.

The fuel tank of ［ 19 ］ expression pumping plants ［ 17 ］ among the figure in addition, also need be described.

Claims (1)

1, a kind of by rapid-release valve [14], low speed air bag [15], source of the gas [16] and hydraulic oil pumping plant compositions such as [17] be used for oil drilling tools, the liquid gas tong of shackle operation, the torque wrench moment restraint device that it is characterized in that this liquid gas tong is by knob valve [2], Pneumatic reversal valve [3], overflow valve [5], pressure meter [6] electro connecting pressure gauge [7], auxiliary reclay [8], auxiliary reclay [9], solenoid operated directional valve [10], choke valve [11], stop valve compositions such as [13], overflow valve [5], pressure meter [6], electro connecting pressure gauge [7] is connected on the pipeline [4], and link with the working hole of Pneumatic reversal valve [3], in the circuit connection process of electro connecting pressure gauge [7] and solenoid operated directional valve [10], passed through to connect by the amplifying circuit that auxiliary reclay [8] and auxiliary reclay [9] are formed, choke valve [11] is installed in the oil return opening of solenoid operated directional valve [10], the air inlet port of Pneumatic reversal valve [3] is by gas circuit pipeline [1], on the gas circuit that the rapid-release valve [14] that knob valve [2] is connected liquid gas tong and low speed air bag [15] link, the oil-in of the oil-in of Pneumatic reversal valve [3] and solenoid operated directional valve [10] is by oil circuit pipeline [12], stop valve [13] is connected pumping plant [17] and transports on the hydraulic oil oil pipe [18] of liquid gas tong.

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