CN2637707Y - Torque self control type hydraulic oil pipepliers - Google Patents

Abstract

The utility model discloses a hydraulic tubing tong which can control the torque automatically and is used to remove the oil pipe in the rework operation of oil field. The utility model is composed of a hydraulic tubing tong body (1) and a torque valve (3); the torque valve is arranged between a motor (2) and a change valve (4) of the hydraulic tubing tong body (1); the hydraulic tubing tong can produce a torque to unscrew under the maximum system pressure and to screw according to the required torque so long as the screwing torque is adjusted to the required value; the hydraulic tubing tong stops automatically when the required screwing torque is reached. The utility model is easy to operate and avoids that the oil pipes are connected together or made unuseful due to abrasion when the thread is screwed too tight, and improves the efficiency and quality of rework operation.

Description

Moment of torsion autocontrol hydraulic tubing tong

Technical field the utility model relates in a kind of oil well repairing operation, the moment of torsion autocontrol hydraulic tubing tong of oil discharge pipe.

The background technology hydraulic tubing tong is the power-equipment in the oil well repairing operation, this equipment since replacing manually-operated, overcome manually go up, shackle labour intensity is big, efficient is low, and damage disadvantages such as oil pipe easily, become indispensable power tool, be subjected to operation worker's welcome deeply.But along with the raising of market demands and the impact of international market, operation quality requires more and more higher, hydraulic tubing tong deficiency in use also begins to come out, mainly contain: go up, can only be with identical moment of torsion during shackle, so that must be too tight on the oil pipe, considerably beyond the regulation of API international standard, cause the shackle difficulty, a large amount of oil pipes is scrapped because of screw thread heavy wear, even can't be dismantled because of thread gluing in addition and have to cut off, annual loss is all very surprising.

The hydraulic tubing tong that had occurred the carry potential overflow valve afterwards, but during each shackle, the workman will improve the oil pressure relief of hydraulic system, high pulling torque operation when adapting to shackle, again the oil pressure relief of system is turned down during to last button, with the torque wrench moment of guaranteeing to stipulate, each adjusting is all wasted time and energy under the adverse circumstances in the open air, and precision is not high yet.Also have a kind of hydraulic tubing tong of microcomputerized control moment of torsion now, it is easy to operate, regulates accurately, but costs an arm and a leg, and can not adapt to that operation field easily collides with and the adverse circumstances of the many mud of many water, also can't promote the use of now.

The summary of the invention the purpose of this utility model provides the hydraulic tubing tong that a kind of energy is realized upward, the shackle moment of torsion is controlled automatically.Before using torque wrench moment is worth in accordance with regulations and mixes up, on when detaining hydraulic tubing tong just change, stop operating hydraulic tubing tong counter-rotating during shackle, and the moment of torsion under the automatic recovery system maximum pressure automatically after reaching prescribed torque.Easy to operate, compliance good.

For achieving the above object, moment of torsion autocontrol hydraulic tubing tong of the present utility model is made up of hydraulic tubing tong body and moment of torsion valve.The hydraulic tubing tong body with use now roughly the same, the moment of torsion valve is contained between the motor of hydraulic tubing tong body and the reversal valve and with the sealing of O RunddichtringO.The moment of torsion valve is made up of two parts, and one is standing part, has four through holes corresponding with the screw on motor and the reversal valve above, and two oilholes are corresponding with the oilhole of motor and reversal valve in addition.Another part is an overflow valve, described overflow valve can be the pilot-operated type structure, be made up of valve body, main valve plug, spring clip, main spring, cone valve, valve seat, pressure spring, guiding valve, pressure regulating screw, trip bolt, pressure-regulating sleeve, plug screw and O RunddichtringO, all the other Hydraulic Elements all distribute on the straight line in valve body except that trip bolt.Pressure-regulating sleeve connects with valve body with screw thread, and seals with the O RunddichtringO, and guiding valve, pressure spring, pressure regulating screw and cone valve are positioned at pressure-regulating sleeve inside.The overfall of overflow valve communicates by the inner oil pocket of through hole on the valve body and pressure-regulating sleeve on the moment of torsion valve.Valve body internal valve seat is positioned at the main valve plug top, and seal with the O RunddichtringO, there is damping hole at the main valve plug center, a series of through holes are arranged on circumference at the bottom, top is main spring, and the main valve plug below is blocked by spring clip, and at this moment the hole is blocked by valve body, when main valve plug was pulled to top, the oil-in of overflow valve communicated with overfall by the hole of main valve plug bottom.There is a hole upper end of pressure-regulating sleeve, and the cross section of pressure regulating screw head is a triangle, at the head of specified range of regulation internal pressure-regulating screw all the time in the pressure-regulating sleeve hole.Described overflow valve also can be a direct dynamic structure.Valve body and standing part can be whole, also can make separation, couple together with cored screw again.By the oilhole of standing part, on the oil-in of overflow valve and the hydraulic tubing tong during button oil-in higher-pressure region of motor communicate, the overfall of overflow valve during with last the button oil-out low-pressure area of motor communicate.

Adopt after such structure, when detaining on the hydraulic tubing tong, the hydraulic oil that enters motor communicates with the import of overflow valve, the overflow valve overflow of working, and system pressure is stabilized in setting and no longer raises.The pressure differential that the size of hydraulic tubing tong output torque and motor are imported and exported is directly proportional, so torque wrench moment also just has been stabilized in setting and no longer raises.When wanting shackle, the reversal valve effect changes with the overfall of overflow valve the hydraulic oil that enters motor and communicates, overflow valve is inoperative, system pressure can not reduce, the shackle moment of torsion also just recovered the high moment of torsion of regulation automatically, thereby reached automatically torque wrench moment and the shackle torque adjustment purpose to setting.Easy to operate, compliance is strong.

Description of drawings is described in further detail the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is the elevation of a kind of embodiment of the utility model moment of torsion autocontrol hydraulic tubing tong.

Fig. 2 is system's johning knot composition of the utility model moment of torsion autocontrol hydraulic pipe wrench.

Fig. 3 is the front view of moment of torsion valve in the embodiment shown in Figure 1.

Fig. 4 is the lateral view of moment of torsion valve shown in Figure 3.

The specific embodiment is shown in Figure 1, and this moment of torsion autocontrol hydraulic tubing tong is made up of hydraulic tubing tong body 1 and the moment of torsion valves 3 that are fixed on its motor 2 and reversal valve 4 centres.

Shown in Figure 2, hydraulic oil in tractor hoist or the workover rig oil tank 5 is after oil pump 6 pressurizations, by the 7 regulating system pressure of the overflow valve on the car, pass on the reversal valve 4 of hydraulic pipe wrench by snap joint 8 and high-pressure rubber pipe 9 then, what the flow direction that changes hydraulic oils by reversal valve 4 realized hydraulic tubing tong goes up button and shackle, and moment of torsion valve 3 is connected on the oil circuit between motor 2 and the reversal valve 4.

Shown in Figure 3 is the sectional view of moment of torsion valve 3, and screw is tightened in the screw of motor 2 after passing the through hole 12 of the fixing hole of reversal valve 4 and moment of torsion valve 3, and moment of torsion valve 3 is pressed between motor 2 and the reversal valve 4, and is inner with the sealing of O RunddichtringO.-oilhole 10 communicates with the overfall 17 of overflow valve, and oilhole 11 communicates with the oil-in 27 of overflow valve, and oilhole 10,11 is again simultaneously the passage of hydraulic oil from reversal valve 4 turnover motors 2, and the step groove 13 of oilhole one side is used for placing the O RunddichtringO.Overflow valve adopts the pilot-operated type structure, when being hydraulic oil in the oilhole 11, hydraulic oil enters main valve plug 25 tops by the damping hole on the main valve plug 25 28, and to cone valve 22 generations thrust upwards, when thrust during greater than the thrust of pressure spring 16, cone valve 22 is opened, main valve plug 25 top pressure reduce, because the effect of damping hole 28 makes the pressure of main valve plug 25 belows greater than top pressure, main valve plug 25 is pushed upwardly, and the hole 26 of main valve plug 25 bottoms communicates with overfall 17, and hydraulic oil overflows into return line by hole 26, the pressure of system is reduced, remain on setting.The size of pressure is by the degree of tightness decision of pressure spring 16, and when tightening pressure regulating screw 19, guiding valve 15 is descending, and pressure spring 16 is compressed, and oil pressure relief is also just along with raising.When being hydraulic oil in the oilhole 10, hydraulic oil enters pressure-regulating sleeve 21 inside and cone valve 22 is produced downward thrust from through hole 24, cone valve 22 is pressed on the valve seat 23, the main valve plug hydraulic fluid pressure that two ends are subjected to about in the of 25 is identical, main valve plug 25 just is pressed on the spring clip 29 by main spring 18, and hole 26 is shut, and hydraulic oil can't overflow, system pressure has kept maximum value, thereby has guaranteed the peak torque of hydraulic tubing tong when shackle.

In order to prevent operative employee's regulated at will torque wrench moment at the scene, the cross section of pressure regulating screw 19 heads is processed into triangle, and process a hole 14 on the top of pressure-regulating sleeve 21, in regulating the moment of torsion process, the head of adjustment screw 19 does not exceed pressure-regulating sleeve 21, so just can guarantee to regulate moment of torsion with instruments such as general spanner, pliers at the scene, have only special-purpose pressure regulation spanner to regulate, also can prevent the danger that pressure regulating screw 19 is collided simultaneously.After torque adjustment is finished, trip bolt 20 is tightened, to guarantee the accurate of torque wrench moment.

This moment of torsion valve 3 adopts the pilot-operated type structure, has advantages such as adjustable range is big, the pressure loss is little, and open and shut characteristic is good, and volume is little.When the overflow valve in the moment of torsion valve also can be Direct Action Type certainly, standing part also can separate with overflow valve in the moment of torsion valve, couples together with cored screw during assembling, and such conversion is all within protection domain of the present utility model.

Claims (3)

1, be used in a kind of oil well repairing operation, the moment of torsion autocontrol hydraulic tubing tong of oil discharge pipe, it is made up of hydraulic tubing tong body (1) and moment of torsion valve (3), it is characterized in that: hydraulic tubing tong body (1) is identical with common hydraulic tubing tong; The through hole (12) that screw passes on the moment of torsion valve (3) is fixed on moment of torsion valve (3) between the motor (2) and reversal valve (4) of hydraulic tubing tong body (1), the centre seals with zero RunddichtringO, oilhole (10) on the moment of torsion valve (3) and oilhole (11) are the hydraulic oil channels between motor (2) and the reversal valve (4): the oil-in (28) of the overflow valve on the moment of torsion valve (3) by on oilhole (1) and the hydraulic tubing tong during button oil-in higher-pressure region of motor (2) communicate, the overfall of overflow valve (17) by oilhole (10) during with last button motor (2) oil-out low-pressure area communicate.

2, moment of torsion autocontrol hydraulic tubing tong according to claim 1, it is characterized in that: the overflow valve on the moment of torsion valve (3) is by guiding valve (15), pressure spring (16), main spring (18), pressure regulating screw (19), trip bolt (20), pressure-regulating sleeve (21), cone valve (22), valve seat (23), main valve plug (25), spring clip (29), zero RunddichtringO (30), plug screw (31), valve body compositions such as (32), Hydraulic Elements distribute on the straight line in moment of torsion valve (3), pressure-regulating sleeve (21) connects with valve body (32) with screw thread, and with zero RunddichtringO (30) sealing, guiding valve (15), pressure spring (16), pressure regulating screw (19), cone valve (22) is positioned at pressure-regulating sleeve (21) inside; The overfall (17) that moment of torsion valve (3) is gone up overflow valve communicates with the inner oil pocket of pressure-regulating sleeve (21) by through hole (24); The interior valve seat of valve body (32) (23) is positioned at main valve plug (25) top, and seals with zero RunddichtringO (30); There is damping hole (28) at main valve plug (25) center, and bottom porose (26), top are main spring (18), and the main valve plug below is blocked by spring clip (29), and at this moment hole (26) are blocked; The oil-in (27) of main valve plug (25) overflow valve when being pulled to top communicates by hole (26) and overfall (17); There is a hole (14) upper end of pressure-regulating sleeve (21), and the cross section of pressure regulating screw (19) head is a triangle, at the head of specified range of regulation internal pressure-regulating screw (19) all the time in the hole (14) in pressure-regulating sleeve (21).

3, moment of torsion autocontrol hydraulic tubing tong according to claim 1, it is characterized in that: the overflow valve of moment of torsion valve (3) is a direct-acting overflow valve.

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