CN2151244Y - Multifunctional joint - Google Patents

Abstract

The utility model relates to a downhole oil production tool which is a connecting-tripping device connected in a sucker rod column in a mechanical oil production oil well. The utility model is mainly provided with the pawl spring body of the control block of a drip, a spring and a lock sleeve which are sheathed on a core axle and a rolling ball disconnecting protector installed below the core axle. Using the connecting-tripping device by matching with the drip with a ball locking channel not only can enable the sucker rod column to trip or connect with each other but also can prevent the sucker rod column from breaking and tripping, and in addition, the connecting-tripping device can be utilized to control the on-off of the drip, achieving the effect of multiple purposes on one object. The utility model has the advantages of reliable operating performance, simple structure, easy fabrication, easy use of downhole operation and multiple reuse.

Description

Multifunctional joint

The utility model relates to a kind of down-hole oil production instrument, is to be connected in the device that has multiple function in the rod string in a kind of mechanical oil recovery oil well, mainly can make the beam hanger post connect easily or throw off in the down-hole.

In oil pumper mechanical oil recovery process, the work that matches with the caliber of down-hole deep well pump of the caliber of general requirements down-hole oil tube, for the production fluid amount that improves oil well after having adopted large diameter deep well pump, the plunger sectional area of deep well pump increases, then require to adopt large diameter oil pipe cooperating, weight and cost for oil production that this must increase oil pipe cause the waste in the production.In order to address this problem, with oil pipe and large-diameter deep well pump cooperating than minor diameter, at sucker rod and deep well pump plunger connection place an on-off connector is installed at present, this on-off connector is a grafting locking type structure, the deep well pump plunger is with after the on-off connector mandrel connects, under deep-well pump barrel elder generation lower going-into-well, the spring detent that is linked together with sucker rod is again in the lower going-into-well, the on-off connector mandrel connects automatically with spring detent in the down-hole, sucker rod and deep well pump plug engages together, thus realize carrying out the purpose of big pump diameter oil pumping with minor diameter tubing.The on-off connector of this connected structure of current use, box cupling on its mandrel and mandrel are thread connection, prevent to thread off although mandrel and box cupling restrict with screw, and the phenomenon that in use should locate the generation dropout is still very serious.Because its project organization, the intracavity diameter of spring detent is bigger with mandrel reduced diameter section gap on the footpath reaches axially with the locking section, when the bigger biased spacing of moving upwards takes place for mutual butt joint rear axle, footpath.So, when the deep well pump plunger is worked, can not remain on the same central axis each other, and produce certain radial effect power.Therefore, evil is relatively gone through in the wearing and tearing of mandrel and spring detent, throws off voluntarily when serious and spring detent takes place by the phenomenon that fractures, and influences the normal pumping of deep well pump.

When the rod-pumped well workover treatment, do not leak outside well for guaranteeing the crude oil in the oil pipe, then a bleeder need be installed above the deep well pump of down-hole, as present oil field autocontrol bleeder commonly used.This bleeder be utilize in the sliding sleeve of controll block from bleeder be connected on the rod string by the time, produce the elastic force friction with three springs control pawls of its upper and lower side respectively and drive sliding sleeves and move, reach the purpose of opening or closing the draining hole.This kind bleeder not only bigger use scope of external diameter is restricted, and sliding sleeve opens the draining hole by rod collar bump easily, and the normal oil pumping of influence is produced.

In the rod string of rod-pumped well, realize for preventing the normal anti-dropping device of installing of rod string dropout.But anti-dropping device commonly used is two single direction thrust ball bearing rotational structures, and not only self diameter is bigger, and live load is less, can not satisfy the oil pumping requirement of oil field oil pipe commonly used and the big big pump of machine.

The novel purpose of this usefulness is for a kind of reliable working performance is provided, sucker rod on-off connector simple in structure, and have anti-dropping device and bleeder function.Use this kind sucker rod on-off connector, both can make rod string throw off or be connected to together, can prevent also that rod string is disconnected takes off, and can also utilize the switch of its control bleeder.

Technical solution of the present utility model is: a kind of down-hole oil production instrument, by pawl spring body, be installed in the multi-functional on-off connector of sucker rod that interior mandrel of lock tube and bleeder constitute with screw thread, and its special character is:

(1), have cannelure on the step on the pawl spring external surface, tensioner ring is installed in the groove, constitutes the controll block of ball lock rollaway type bleeder, jump ring body inside has and mandrel top vestibule and taper hole movingly, and the bottom of pawl spring body is a pawl spring;

(2), helical spring, lock tube be sleeved on the bottom of mandrel successively, baffle ring is installed on the mandrel by screw thread, has boss and groove on the mandrel;

(3), go up on the raceway body lower surface and have the ring raceway groove, last raceway body connects with dwang by screw thread, and is locked by lock nut, the dwang bottom is rod connector;

(4), down the raceway body connects with the mandrel lower end by screw thread, following raceway body upper surface has the ring raceway groove, between the raceway body ball is installed up and down.

The utility model has the advantages that three kinds of different down-hole oil production instruments of effect organically are combined as a whole, both dwindled size, reduced the connection between them again, simple in structure, be convenient to processing and manufacturing, and easy to use when underground work, realized the multi-functional effect of a thing.

Fig. 1 is a section of structure of the present utility model.

Be further described below in conjunction with accompanying drawing: the top of pawl spring body 1 has the sucker rod screw thread, on the boss of pawl spring body 1, has the twice groove, tensioner ring 2 is installed in the groove, constitute the controll block of bleeder by boss and tensioner ring 2, the bottom of pawl spring body 1 is 6 pawl springs, the lower end of pawl spring has inside and outside chamfering, and the endoporus middle part of pawl spring body 1 has and mandrel 3 upper ends aperture and taper hole movingly.With helical spring 8, lock tube 7 is sleeved on the mandrel 3, is installed on the mandrel 3 spacingly to lock tube 7 by screw thread with baffle ring 6, has boss 4 and groove 5 on the mandrel 3.The lower end of pawl spring body 1 promotes the upper end of lock tube 7, helical spring 8 is compressed, when the lower end of pawl spring body 1 reaches groove 5 places, lock tube 7 is boosted by helical spring 8,6 pawl springs are pinned, it can not be opened, reach purpose of connecting, this moment, the upper end of mandrel 3 extend in the vestibule at middle part in the pawl spring body 1, and vestibule internal diameter and mandrel upper end are for movingly.Have the ring raceway groove on the lower surface of last raceway body 11, its cross section is a circular arc, and last raceway body 11 is installed on the dwang 15 by screw thread, uses nut 9 with its locking; And nut 9 is fixed with screw 10.The inner chamber of mandrel 3 lower ends is put in the upper end that installs the dwang 15 of raceway body 11, nut 9, screw 10, and the ball 12 of packing into, raceway body 13 down is installed in the lower end of mandrel 3 by screw thread, be fixed with screw 14.The upper surface of following raceway body 13 has the ring raceway groove, and its diameter is identical with the ring raceway groove diameter of last raceway body, and its cross section is a circular arc, and the bottom of following raceway body 13 is a flattened round.The bottom of dwang 15 is the rod connector form, and promptly the lower end is the sucker rod screw thread, and screw thread top is a shoulder, and shoulder top is four directions and arc transition.

The utility model and the supporting use of ball lock rollaway type bleeder main body.Pawl spring body 1 upper end is connected with sucker rod by screw thread, the bleeder main body below that pawl spring body 1 is in be installed in the tubing string.Dwang 15 lower ends connect sucker rod or oil pump plunger piston.When the oil well operation, on carry rod string, this multi-functional on-off connector is up thereupon, pawl spring body 1 is during by bleeder main body inner chamber, tensioner ring 2 drives on the sliding sleeve of bleeders and moves, and opens bleeder.Carry rod string in the continuation, pawl spring body 1 is by the bleeder main body, and lock tube 7 is blocked by the bleeder sliding sleeve, and compression helical spring 8 is and descending, and when the lower end of pawl spring body 1 was deviate from the upper end of lock tube 7, the pawl spring sheet opened, and breaks away from mandrel 3.

Claims (1)

1, a kind of down-hole oil production instrument by the pawl spring body with screw thread, is installed in the multi-functional on-off connector of sucker rod that interior mandrel of lock tube and bleeder constitute, and it is characterized in that:

(1), have cannelure on the step on the pawl spring external surface, tensioner ring is installed in the groove, constitutes the controll block of bleeder, have in the pawl spring body and mandrel top vestibule and taper hole movingly, the bottom of pawl spring body is a pawl spring;

(2), helical spring, lock tube be sleeved on the bottom of mandrel successively, baffle ring is installed on the mandrel by screw thread, has boss and groove on the mandrel;

(3), go up on the raceway body lower surface and have the ring raceway groove, last raceway body connects with dwang by screw thread, last raceway body is locked by lock nut, the dwang bottom is rod connector;

(4), down the raceway body connects with the mandrel lower end by screw thread, following raceway body upper surface has the ring raceway groove, between the raceway body ball is installed up and down.

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