CN2311599Y - Sucker rod disconnecting and connecting device - Google Patents

Abstract

The utility model discloses a sucker rod disconnecting and connecting tool, which is used for an oil extraction machine in an oilfield to realize the function of the connection and disconnection of a sucker rod and the piston rod of an oil well pump. The utility model comprises a multiple pawl elastic clip, a butt-joint rod, a locking sleeve, a thrust spring, and a screw nut in the prior art. The utility model is characterized in that the shape and the dimension of the ring groove in the multiple pawl elastic clip are the same with the shape and the dimension of an upper convex body on the outer circle of the butt-joint rod. After the ring groove and the upper convex body are connected to the target, the distance between the cone apex of the end of the butt-joint rod and a baffle plate in the inner hole of the multiple pawl elastic clip is not larger than 0.5 mm. The utility model has the same use method with the use method of the prior art, with the advantages of simple structure, difficult damage, etc. compared with the prior art.

Description

A kind of sucker rod on-off connector

The utility model relates to oil recovery machiner, exactly is a kind of mechanical device that is used for realizing docking, throwing off between deep-well oil pump piston rod and the sucker rod function.

At present, to be notification number be CN2048905U, application number are 88216623.9, name is called the sucker rod on-off connector patented technology with a kind of more advanced sucker rod on-off connector that uses in the oil recovery process of oil field of people.This sucker rod on-off connector is to be made of multijaw bullet card, butt joint, lock sleeve, retainer spring, thrust spring and nut, wherein multijaw bullet card is that an endoporus middle part is shaped on a radially body of hollow shelf, be shaped on a plurality of openings vertically on the one end tube wall, form a plurality of elastic claws simultaneously, be shaped on an annular groove in its this end inner chamber, be shaped on the internal thread that is complementary with sucker rod end external screw thread in its other end inner chamber; Lock sleeve is a tubbiness member, and its intracavity diameter and multijaw bullet card cylindrical match, both matched in clearance, and central part is made a through hole at the bottom of its barrel; Butt joint is the shaft-like part that a middle part is shaped on shoulder, this shoulder one side shaft section end is shaped on the external screw thread that matches with oil well pump piston rod end internal thread, its opposite side shaft part cylindrical and multijaw bullet card endoporus are complementary, both movingly, this shaft part end is made cone-shaped, is shaped on an outer convex ring body on this shaft part cylindrical, and the annular groove endoporus in the cylindrical of this outer convex ring body and the above-mentioned multijaw bullet card endoporus is complementary, both matched in clearance, the length of this outer convex ring body are slightly less than this annular groove length; In use, external screw thread one end that is shaped on of extension bar is inserted from lock sleeve bung one end, and pass from its barrel bottom outlet, be nested with above-mentioned thrust spring on its external part cylindrical, this spring is fastening by above-mentioned nut; The assembly of Xing Chenging is by being connected in the piston rod upper end of oil well pump to extension bar one end external screw thread thus; Having in the elastic claw one end inner chamber of multijaw bullet card fixedly installs above-mentioned retainer spring, and this assembly is connected in the sucker rod bottom by the internal thread of multijaw bullet card one end; In the sucker rod folding process, extension bar upper end cone is at first inserted in the lower end endoporus of multijaw bullet card, the elastic claw that is positioned at this end of multijaw bullet card is risen outward, and the promotion lock sleeve moves down, up to the outer convex ring body on the extension bar is entered in the inner groove of multijaw bullet card, at this moment, to under the retainer spring thrust of extension bar in multijaw bullet card chamber and realize axial location between multijaw bullet card, meanwhile lock sleeve is being nested with on the cylindrical of multijaw bullet card under the thrust of thrust spring, thereby realizes connecting between sucker rod and the oil well pump piston rod; When needs are thrown off sucker rod and oil well pump piston rod, carry sucker rod on only needing, make disjointed device with on move, put when place head when moving to the arrow that is arranged between pump barrel and the oil pipe on it, lock sleeve is blocked and moves down, after lock sleeve broke away from multijaw bullet card cylindrical, butt joint just can be shifted out from multijaw bullet card endoporus, can achieve the goal.The subject matter that this sucker rod on-off connector exists is, structure is complicated, and its retainer spring often fractures under to the extension bar impact force action, damages, so use is very inconvenient.

The purpose of this utility model is to provide a kind of sucker rod on-off connector simple in structure, fragile, not easy to use for people.

The purpose of this utility model is to realize like this, it comprises multijaw bullet card 1, to extension bar 2, lock sleeve 3, thrust spring 4, nut 5, be characterized in, radially dividing plate in described multijaw bullet card 1 endoporus is a solid slab, described shape to the annular groove made in the outer convex ring body made on the extension bar cylindrical and the described multijaw bullet card endoporus, measure-alike, both matched in clearance; Should outer convex ring body connect with annular groove be in place after, 0.3-0.5 millimeter apart between the cone apex of described butt joint boom end and the radially dividing plate end face in the described multijaw bullet card endoporus.

After the utility model is realized, be easy to the retainer spring that damages in the prior art,, and reduced its fault rate in use so it is not only simple in structure because it has omitted, make it to use safer, make things convenient for.

Below in conjunction with accompanying drawing embodiment of the present utility model is done explanation in further detail.

Fig. 1 is a structural representation of the present utility model.

As seen from the figure, the utility model is by multijaw bullet card 1, to extension bar 2, lock sleeve 3, thrust spring 4, nut 5 constitutes, be shaped on a radially solid separator in multijaw bullet card 1 endoporus, its left end is shaped on the internal thread that is complementary with sucker rod end external screw thread, makes five openings on its right part tube wall vertically, forms five elastic claws; Make an annular groove in this end endoporus, this left end cylindrical and endoporus end are made chamfering respectively; To extension bar 2 are shaft-like parts that shoulder is made at a middle part, make an outer convex ring body on the shaft part cylindrical of shoulder left side, annular groove shape in shape, size and the above-mentioned multijaw bullet hole clipping of this outer convex ring body, measure-alike, both movingly, this side shaft section cylindrical and multijaw bullet card endoporus are complementary, and both movingly; The right part of shoulder right side shaft part is shaped on the external screw thread that the interior spiral shell section with the oil well pump piston rod end is complementary; Lock sleeve 3 is tubbiness members, makes a through hole at the bottom of its barrel, this hole with extension bar shoulder right side shaft part cylindrical is matched, both matched in clearance, its inner chamber and multijaw bullet card cylindrical match both matched in clearance, left end bucket wall outward flanging is shaped on 3 radial holes on its barrel wall altogether; Employed each part of the utility model is all manufactured by figure, and each part is got all the back ready and got final product by the figure assembling.

Use installation of the present utility model, method of operating, all same as the prior art, this no longer repeats again.

Claims (1)

1, a kind of sucker rod on-off connector, comprise multijaw bullet card (1), to extension bar (2), lock sleeve (3), thrust spring (4), nut (5), it is characterized in that, radially dividing plate in described multijaw bullet card (1) endoporus is a solid slab, described shape to the annular groove made in the outer convex ring body made on the extension bar cylindrical and the described multijaw bullet card endoporus, measure-alike, both matched in clearance; Should outer convex ring body connect with annular groove be in place after, between the cone apex of described butt joint boom end and the radially dividing plate end face in the described multijaw bullet card endoporus, be not more than 0.5 millimeter apart.