CN103742088A - Double spring support pull type automatic filling valve float valve - Google Patents

Abstract

The invention discloses a double spring support pull type automatic filling valve float valve. The automatic filling valve float valve is characterized in that a float valve is arranged in a float valve joint, a valve is hinged to a valve seat of the float valve, the elastic force of a torsion spring which is supported on the valve and the valve seat can enable the valve to be closed up with the valve seat when the valve is in a free state, the principle that the holding force and pulling force of a tension spring are used for balancing the elastic force of the torsion spring when an automatic closing valve type float valve is closed, and the force which flows into a pipe and is caused by liquid column pressure difference inside and outside the pipe can make the valve be always in an ajar state, a fluid flow passage is formed, and the purpose of automatic filling is achieved. When kick or blowout happens in the pipe, the tension spring of the valve is lengthened under the action of flowing liquid in the pipe. The valve is closed, and plays the action of a single flow valve. The problem of being unable to automatically fill of the existing valve type float valve is solved. The tension spring and the torsion spring are replaced and the force and the length of the springs are adjusted before the drilling tool is run into a well every time; the double actions of the double springs avoid the abuse of losing effectiveness of the float valve after the torsion spring is easily broken.

Description

Dual spring props up pull-type automatic grouting valve float valve

Technical field

The present invention relates in brill (lower oil pipe) process, not stop lower brill (lower oil pipe) operation under oil drilling and take the mode of manual grouting, can automatic grouting.When the flow velocity of the tube fluids such as well kick, blowout reaches certain value, play the effect of ball-and-seat, can stop to manage the generation of interior gas blowout accident.

Background technology

Under oil drilling, bore the effect of only playing ball-and-seat in (lower oil pipe) process because of the conventional valve type float valve in scene, and because of the restriction of its bearing capacity and drilling rod (oil pipe) collapsoing strength, lower brill (lower oil pipe) is to prevent that valve type float valve from easily causing even gas blowout accident of well kick in pipe while causing losing efficacy because the pressure that bears is excessive during to certain well depth, anti-drilling rod (oil pipe) is squeezed to be ruined and causes the reasons such as other complex accident, must stop lower brill (lower oil pipe) operation and connect kelly bar toward the interior perfusion of drilling rod (oil pipe) mud, to avoid the generation of above-mentioned many complexity and accident.Easy fatigue fracture under the effect now repeatedly opening and closing through start-stop pump with the torsion spring of valve, loses the effect of ball-and-seat, both well kick and blowouts in uncontrollable pipe.In addition because of the existence of ball-and-seat, in drilling rod (oil pipe) decentralization process for fear of the annular space causing because of drilling rod (oil pipe) row of closing high return that speed causes that excessive surge pressure causes the complex situations such as leakage control drilling rod (oil pipe) lowering velocity.This has not only delayed a large amount of lower brills (lower oil pipe) time, has increased workman's labour intensity, also likely stops tripping operation toward the differential sticking accident causing not in time because of drilling rod activity during mud grouting in drilling rod, retarding oil gas exploration progress.

Summary of the invention

For the problems of the above-mentioned existence of on-the-spot valve type float valve, object of the present invention has aimed to provide a kind of dual spring and has propped up pull-type automatic grouting valve float valve.Its principle is to have certain support force, draw spring to have the valve of the mutual balance valve type float valve of principle of certain support force and pulling force all the time in crack state according to support top torsion spring, forms fluid passage, realizes the object of automatic grouting.Under the effect of repeatedly turn on pump and termination of pumping, also have during the fatigue fracture of support top torsion spring and draw spring to make the valve of float valve in closing or crack state, while now there is well kick or blowout in pipe, valve props up and draws spring to be elongated under the double acting of working fluid in pipe and support top torsion spring, valve is closed, play the object of ball-and-seat, prevent from managing interior well kick, gas blowout accident.Avoid existing can not automatic grouting with valve type float valve drawback and support top torsion spring easily damage after the problem that lost efficacy of float valve.

The object of the invention is to complete like this:

Dual spring props up pull-type automatic grouting valve float valve, comprise float valve joint, float valve and valve prop up drawing device composition, float valve is by upper valve body, upper sealing ring, gasket ring, middle sealing ring, valve valve block, valve sealing ring, valve and lower seal form, valve props up drawing device and is propped up and drawn spring carrier arm by valve, support top torsion spring and Zhi La spring form, float valve is placed in float valve joint, upper valve body and the screwed connection of valve valve block, upper sealing ring, gasket ring, middle sealing ring is enclosed within on upper valve body, valve sealing ring is installed in valve and closes in the groove of place's valve valve block, lower seal is enclosed within the lower end of valve valve block, the place of windowing, centre of valve valve block is hinged with valve, one end of support top torsion spring is supported on valve, the other end is supported on valve valve block, the lower end of windowing of valve hinge the valve valve block is here processed with to prop up draws spring carrier arm, drawing one end of spring to be suspended to draws in the hole of spring carrier arm, the Kong Zhongzhi that the other end is suspended to valve top holds valve.

The beneficial effect of advantage of the present invention and generation is:

1, the present invention is simple in structure, adopts conventional part assembling, is easy to processing, reasonable and compact in structure, operation sequence is simple, easy-to-use, effectively prevented drilling fluid, landwaste and high-pressure oil gas stream is by refluxing in drilling tool, avoid managing the risk of interior blowout, and cost is low, safe and reliable.

2, after field trial of the present invention success, while applying, not only do not stop lower brill (lower oil pipe) the operation operation of being in the milk, because not being the row of closing, reduced pressure excitement, can accelerate drilling rod (oil pipe) lowering velocity, save a large amount of lower brills (lower oil pipe) time.

3, the present invention has not only reduced post workman's labour intensity, and the while can be avoided the lock of tool drilling occurring not in time because stopping tripping operation activity, accelerates oil-gas exploration progress.

Accompanying drawing explanation

Fig. 1 is sectional view of the present invention.

The specific embodiment

As shown in Figure 1, a kind of dual spring props up pull-type automatic grouting valve float valve, comprise float valve joint 1, float valve and valve prop up drawing device composition, float valve is by upper valve body 2, upper sealing ring 3, gasket ring 4, middle sealing ring 5, valve valve block 6, valve sealing ring 7, valve 9 and lower seal 11 form, valve props up drawing device and is propped up and drawn spring carrier arm 6a by valve, support top torsion spring 8 and Zhi La spring 10 form, float valve is placed in float valve joint 1, upper valve body 2 and the 6 use screwed connections of valve valve block, upper sealing ring 3, gasket ring 4, middle sealing ring 5 is enclosed within on upper valve body 2, valve sealing ring 7 is installed in valve 9 and closes in the groove of place's valve valve block 6, lower seal 11 is enclosed within the lower end of valve valve block 6, the place of windowing, centre of valve valve block 6 is hinged with valve 9, one end of support top torsion spring 8 is supported on valve 9, the other end is supported on valve valve block 6, the lower end of windowing of valve 9 hinges the valve valve block 6 is here processed with to prop up draws spring carrier arm 6a, drawing one end of spring 10 to be suspended to draws in the hole of spring carrier arm 6a, the Kong Zhongzhi that the other end is suspended to valve 9 tops holds valve 9.

The internal diameter of the external diameter of float valve and float valve joint 1 is basically identical, three sealing rings of upper, middle and lower of float valve form with it sealing, at the inwall of float valve joint 1, there is convex circular bead surface, float valve is placed in float valve joint 1, the lower end that lower seal 11 is enclosed within valve valve block 6 withstands on the convex circular bead surface of float valve joint 1, and when float valve joint 1 is connected with drilling tool, the small end of drilling tool male joint withstands float valve it can not be moved up.

Should reach the object of automatic grouting, also will be in generator tube well kick, even play the action principle of ball-and-seat during blowout: the elastic force of support top torsion spring 8 at valve 9, can make during in free state valve 9 closed live valve valve block 6, draw the length of spring 10 and pulling force energy balance to live the power of support top torsion spring 8 and fluid column and be applied on valve 9 power of 0.6MPa at most and make valve 9 all the time in crack state.After 8 fatigue fractures of support top torsion spring, also have to prop up and draw spring 10 to support and hold valve 9 in crack state, reach the object of automatic grouting.When there is well kick and blowout, toward fluid pressure action mobile in pipe, the power on valve 9 can overcome easily and props up a pulling force that draws spring 10, and valve 9 is fully contacted with float valve end face, plays the effect of ball-and-seat.

Claims (1)

1. a dual spring props up pull-type automatic grouting valve float valve, comprise float valve joint (1), float valve and valve prop up drawing device composition, it is characterized in that float valve is by upper valve body (2), upper sealing ring (3), gasket ring (4), middle sealing ring (5), valve valve block (6), valve sealing ring (7), valve (9) and lower seal (11) form, valve props up drawing device and is propped up and drawn spring carrier arm (6a) by valve, support top torsion spring (8) and draw spring (10) to form, float valve is placed in float valve joint (1), upper valve body (2) and screwed connection for valve valve block (6), upper sealing ring (3), gasket ring (4), middle sealing ring (5) is enclosed within on upper valve body (2), valve sealing ring (7) is installed in valve (9) and closes in the groove of place's valve valve block (6), lower seal (11) is enclosed within the lower end of valve valve block (6), the place of windowing, centre of valve valve block (6) is hinged with valve (9), one end of support top torsion spring (8) is supported on valve (9), the other end is supported on valve valve block (6), the lower end of windowing of valve (9) hinge the valve valve block (6) is here processed with to prop up draws spring carrier arm (6a), drawing one end of spring (10) to be suspended to draws in the hole of spring carrier arm (6a), the Kong Zhongzhi that the other end is suspended to valve (9) top holds valve (9).

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