CN203334997U - Propping-type automatic grouting trapdoor-type float valve - Google Patents

Abstract

The utility model discloses a propping-type automatic grouting trapdoor-type float valve. The propping-type automatic grouting trapdoor-type float valve is characterized in that the float valve is arranged in a float valve connector, and a trapdoor propping device is welded in the float valve. A trapdoor is hinged to a trapdoor valve body seat of the float valve. The elastic force of a torsion spring on the trapdoor and the trapdoor valve body seat can enable the trapdoor to seal the trapdoor valve body seat when the trapdoor is in a free state. According to the principle that a propping spring has certain supporting force (spring force can be adjusted through replacement of the springs in different sizes), the trapdoor propping device can balance the spring force that enables the trapdoor of the trapdoor-type float valve to automatically close and the force that enables fluid in a well to flow into a pipe through inside and outside differential pressure. A propping rod enables the trapdoor of the trapdoor-type float valve to be always in a slightly open state so as to form a channel to achieve automatic grouting. When a well kick or a well blowout happens in the pipe, the trapdoor enables the propping rod to compress the propping spring under the action of liquid flowing into the pipe, the propping rod retracts into a propping box, and then the trapdoor is closed. Consequently, the propping-type automatic grouting trapdoor-type float valve plays a role of a check valve, prevents a well kick accident or a well blowout accident in the pipe from happening, and overcomes the defect that automatic grouting can not be carried out by the adoption of an existing trapdoor-type float valve.

Description

Support top formula automatic grouting valve float valve

Technical field

The utility model relates under oil drilling and not to stop lower brill (lower oil pipe) in (lower oil pipe) process of boring the mode of manual grouting is taked in operation, but automatic grouting.When reaching certain value, plays the flow velocity of the tube fluids such as well kick, blowout the effect of ball-and-seat, the generation of gas blowout accident in pipe in the time of can stopping to pull out of hole.

Background technology

Bore the effect of only playing ball-and-seat in (lower oil pipe) process because of scene valve type float valve commonly used under oil drilling, and the restriction because of its bearing capacity and drilling rod (oil pipe) collapsoing strength, lower brill (lower oil pipe) is to prevent from when valve type float valve from causing losing efficacy because the pressure born is excessive easily causing in pipe well kick even gas blowout accident, anti-drilling rod (oil pipe) are squeezed ruining and causing the reason such as other complex accident during to certain well depth, must stop lower brill (lower oil pipe) operation and pour into mud in drilling rod (oil pipe), to avoid the generation of above-mentioned many complexity and accident.In addition because of the existence of ball-and-seat, in drilling rod (oil pipe) decentralization process for fear of the annular space caused 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, the differential sticking accident caused not in time because of the drilling rod activity while also likely stopping tripping operation toward the interior mud grouting of 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, the purpose of this utility model has aimed to provide a kind of support top formula automatic grouting valve float valve.Its principle be have according to the support top spring that the principle balance of certain support force closes that spring force that the valve type float valve valve closes and borehole fluid inside and outside differential pressure cause automatically toward mobile power in pipe, propping up push rod makes its valve all the time in crack state, form passage, realize the purpose of automatic grouting.Valve push rod compression support top spring under the effect of working fluid in pipe when well kick or blowout occur in pipe, a push rod retraction is propped up in top box, and valve is closed, and plays the purpose of ball-and-seat, prevents from managing interior well kick, gas blowout accident.Avoid existing drawback that can not automatic grouting with valve type float valve.

The purpose of this utility model completes like this:

Support top formula automatic grouting valve float valve comprises float valve joint, float valve and valve support top installation composition.Float valve by upper valve body, upper sealing ring, gasket ring, in sealing ring, valve valve block, valve, torsion spring, lower seal form.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, the internal diameter of the internal diameter of float valve and float valve joint is basically identical, in the float valve inner nosepiece wall, the convex circular bead surface is arranged, float valve is placed in the float valve joint, the lower seal lower end that is enclosed within valve valve block lower end withstands on the convex circular bead surface and forms sealing, when the float valve joint is connected with drilling tool, the small end of tool joint withstands float valve, be hinged with valve on the valve valve block, one end of torsion spring is supported on valve, the other end of torsion spring is supported on the valve valve block, the elastic force of torsion spring can make the closed valve valve block of living of valve during in free state at valve.Be welded with valve in the valve valve block inner chamber of valve hinge opposite side and prop up ejection device, it consists of a push rod, pressure transfer hole, a top box, support top spring, support top lid, check pin.Prop up push rod passes from the support top lid, push rod and support top lid respectively have a shoulder mutually to hang in the support top lid not to be ejected, the support top lid connects with a top box with screw thread, have on the support top lid and screw and loosen the instrument eyelet that the support top lid is used, the eyelet UNICOM of an eyelet and support top box body wherein, check pin prevents that through this eyelet the support top lid from getting loose, the periphery that props up top box and support top lid evenly has several pressure transfer holes, an inner chamber welding of propping up top box and valve valve block when ejection device is propped up in welding.

The beneficial effect of advantage of the present utility model and generation is:

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

3, the utility model has not only reduced post workman's labour intensity, can avoid the lock of tool drilling occurred not in time because stopping the tripping operation activity, accelerates the oil-gas exploration progress simultaneously.

The accompanying drawing explanation

Fig. 1 is the utility model sectional view.

Fig. 2 is that the utility model props up the ejection device enlarged drawing.

The specific embodiment

As shown in Figure 1, a kind of support top formula automatic grouting valve float valve comprises float valve joint 1, float valve and valve support top installation composition.Float valve by upper valve body 2, upper sealing ring 3, gasket ring 4, in sealing ring 5, valve valve block 6, valve 7, torsion spring 8, lower seal 9 form.Upper valve body 2 is used screwed connection with valve valve block 6, upper sealing ring 3, gasket ring 4, middle sealing ring 5 is enclosed within on upper valve body 2, the internal diameter of the internal diameter of float valve and float valve joint 1 is basically identical, at float valve joint 1 inwall, the convex circular bead surface is arranged, float valve is placed in float valve joint 1, lower seal 9 lower ends that are enclosed within valve valve block 6 lower ends withstand on the convex circular bead surface and form sealing, when float valve joint 1 is connected with drilling tool, the small end of tool joint withstands float valve, be hinged with valve 7 on valve valve block 6, one end of torsion spring 8 is supported on valve 7, the other end of torsion spring 8 is supported on valve valve block 6, the elastic force of torsion spring 8 can make the closed valve valve block 6 of living of valve 7 during in free state at valve 7.Be welded with valve in valve valve block 6 inner chambers of valve 7 hinge opposite side and prop up ejection device, it consists of a push rod 10, pressure transfer hole 11, a top box 12, support top spring 13, support top lid 14, check pin 15.Prop up push rod 10 passes from support top lid 14, push rod 10 and support top lid 14 respectively have a shoulder mutually to hang in support top lid 14 not to be ejected, support top lid 14 use screw threads connect with a top box 12, the instrument eyelet that screws and loosen support top lid 14 use is arranged on support top lid 14, the eyelet UNICOM of an eyelet and top box 12 bodies wherein, check pin 15 prevents that through this eyelet support top lid 14 from getting loose, the periphery that props up top box 12 and support top lid 14 evenly has several pressure transfer holes 11, when ejection device is propped up in welding, only propping up top box 12, with the inner chamber of valve valve block 6, welds.

Several pressure transfer holes 11 that the periphery of top box 12 and support top lid 14 is opened can make a push rod suffered mutual balance of hydraulic pressure 10 Shang Xia, guarantee to prop up the impact that push rod 10 is not subject to ambient pressure environment.Have the instrument eyelet that screws and loosen support top lid 14 use on top cover 14, process the special tool that screws and loosen support top lid 14 being convenient for changing accessory in an ejection device, regulate support top power and the upkeep operation of an ejection device.

Assemble valve and prop up ejection device, then valve is propped up in valve valve block 6 inner chambers that ejection device is welded to valve 7 hinge opposite side, only a welding top box 12.The position when welding position that valve props up ejection device is acted on after the force compresses on valve the top of propping up push rod 10 and closes a little less than valve 7 by the minimum fluid pressure refluxed in pipe with a push rod 10, fully contact with the float valve end face to guarantee valve 7.

When propping up ejection device, the welding valve only the welding of the inner chamber of a top box 12 and valve valve block 6, carrys out the suitable aperture of governor valve 7 to be convenient for changing support top spring 13 and a push rod 10.Should reach the purpose of automatic grouting, also will be in generator tube well kick, even play the effect of ball-and-seat during blowout.

Claims (1)

1. a support top formula automatic grouting valve float valve comprises float valve joint (1), float valve and valve support top installation 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 (7), torsion spring (8), lower seal (9) forms, upper valve body (2) is used screwed connection with valve valve block (6), upper sealing ring (3), gasket ring (4), middle sealing ring (5) is enclosed within on upper valve body (2), the internal diameter of the internal diameter of float valve and float valve joint (1) is basically identical, at float valve joint (1) inwall, the convex circular bead surface is arranged, float valve is placed in float valve joint (1), lower seal (9) lower end that is enclosed within valve valve block (6) lower end withstands on the convex circular bead surface and forms sealing, float valve joint (1) while being connected with drilling tool the small end of tool joint withstand float valve, be hinged with valve (7) on valve valve block (6), one end of torsion spring (8) is supported on valve (7), the other end of torsion spring (8) is supported on valve valve block (6), the elastic force of torsion spring (8) can make the closed valve valve block (6) of living of valve (7) during in free state at valve (7), be welded with valve in valve valve block (6) inner chamber of valve (7) hinge opposite side and prop up ejection device, it is by a push rod (10), pressure transfer hole (11), prop up top box (12), support top spring (13), support top lid (14), check pin (15) forms, prop up push rod (10) passes from support top lid (14), push rod (10) and support top lid (14) respectively have a shoulder mutually to hang in support top lid (14) not to be ejected, support top lid (14) connects with a top box (12) with screw thread, the instrument eyelet that screws and loosen support top lid (14) use is arranged on support top lid (14), the eyelet UNICOM of an eyelet and top box (12) body wherein, check pin (15) prevents that through this eyelet support top lid (14) from getting loose, the periphery that props up top box (12) and support top lid (14) evenly has several pressure transfer holes (11), when propping up ejection device, welding only a top box (12) and the inner chamber of valve valve block (6) are welded.

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