CN2627288Y - Hydraulic tuntable rotation sealing arrangement - Google Patents

Abstract

The utility model relates to a mechanical sealing device of hydraulic rotary table in downhole remedial operation, which comprises a rotary table, a screw bolt, as well as a self-sealing pressure plate etc., the rotary table is an inner step-shaped cylindrical cavity, an upper cavity and a lower cavity form a convex shoulder, a self-sealing rubber core is a hollow structure, the upper end outer side is provided with a circular convex table, the self-sealing rubber core is sit on the inner cavity convex shoulder of the rotary table, the self-sealing pressure plate is a hollow structure, the bottom part is pressed on the upper end of the self-sealing rubber core, the other end surface is pressed on the rotary table upper surface, the self-sealing pressure plate is tightly fixed on the rotary table by a screw bolt, the self-sealing rubber core is tightly pressed, the self-sealing rubber core is a rubber product, and the automatic sealing is realized through the cooperation of the self-sealing rubber core and a driving stem. The utility model makes other rotary self-sealing no longer in use during operation, decrease the rotary table height from the ground, and no oil contamination spatters on the rotary table surface, thereby making the downhole remedial operation more smooth, clean, and high efficient.

Description

A kind of hydraulic swivel head rotating sealing device

Technical field the utility model relates to mechanical rotation sealing, the especially rotary seal of hydraulic swivel head in the petroleum works workover eration.

The technical background hydraulic swivel head is that drilling out in the oil well repairing operation, cover mill and the novel well servicing equipment of underground work such as thread making, use this equipment can further enlarge the job area and the ability of well repairing machine, the alternative rotary operation of finishing some drill string of heavy repair task team of light maintenance operation team, easy to use, reduce workover cost.But there is following problem in the hydraulic swivel head that uses at present: 1, do not have seal arrangement between turntable inner chamber and the kelly bar, when workover eration, though oil well sewage through the pod apertures water conservancy diversion, still has part of contaminated water to spill from square bushing by the turntable inner chamber, pollute the well head surrounding environment, influence is carried out production strictly in line with rules and regulations.2, to overcome the above problems, existing way is that add a rotation again in the bottom of hydraulic swivel head self-styled, but add that the plane is with respect to the height rising on ground on the self-styled turntable later on of rotation, operation is very inconvenient, in the workover eration process,, prolonged the activity duration if rise, descend well tool and to rotate self-styled unloading with hydraulic swivel head, otherwise the instrument that can influence passes through, and uses the self-styled cost that increased of rotation simultaneously.Chinese patent ZL95202568.x is to rely on rubber seal and copper sheathing to match and carry out axial seal, and it is the sealings of household electric appliance to motor shaft, is not suitable for the axial seal of petroleum well workover operation hydraulic swivel head.

A kind of hydraulic swivel head rotating sealing device of summary of the invention the utility model technical problem to be solved is exactly the sealing problem that will solve between hydraulic swivel head intermediate station and the kelly bar.The technical solution of the utility model is to realize like this, a kind of hydraulic swivel head rotating sealing device, it is mainly by turntable, bolt, compositions such as self-styled pressing plate, turntable is interior stepped cylindrical cavity, top is the big column cavity, the bottom is the small column cavity, on, following cylindrical cavity forms convex shoulder, self-sealing rubber core is a hollow-core construction, upper outside has round ring boss, and the round ring boss of self-sealing rubber core is sat on the convex shoulder that is contained in the turntable cavity, and self-styled pressing plate lower end is pressed in the upper-end surface of self-sealing rubber core, self-styled pressing plate is a hollow-core construction, and self-sealing rubber core is directly installed in the inner chamber of turntable; Self-sealing rubber core is the hollow glue core of being made by rubber, and self-sealing rubber core can rotate freely, and bolt is fastened on the turntable end face with self-styled pressing plate, and is pressed in the axial freedom of self-sealing rubber core top with the restriction self-sealing rubber core; Self-styled pressing plate is made the inside and outside all directions of matching with the radial engagement place of turntable.

Description of drawings Fig. 1 is a longitudinal sectional drawing of the present utility model, among the figure 1, bolt, and 2, self-styled pressing plate, 3, turntable, 4, self-sealing rubber core.

Embodiment is with reference to Fig. 1, self-sealing rubber core (4) is the hollow rubber goods, its upper outside has an annulus boss, turntable (3) inner chamber be two big, little hollow cylinder structure, the boss of self-sealing rubber core takes a seat on the convex shoulder that is contained in two hollow cylinders formation of turntable inner chamber, be slipper seal between self-sealing rubber core and the turntable, self-sealing rubber core can rotate freely, self-styled pressing plate (2) is a hollow-core construction, its lower end surface is pressed in the upper-end surface of self-sealing rubber core (4), another cylindrical end face is pressed on the upper-end surface of turntable (2), by bolt (1) self-styled pressing plate (2) is fastened on the turntable end face, the axial freedom of restriction self-sealing rubber core (4), the moment of torsion of turntable passes to kelly bar by the square bushing in all directions in the self-styled pressing plate of installing (2) during well workover, for guaranteeing the reliability of self-styled pressing plate (2) transmitting torque, self-styled pressing plate (2) is made the inside and outside all directions of matching with the radial engagement place of turntable (3).

Owing to increase self-sealing rubber core between turntable inner chamber and the kelly bar, when workover eration, oil well sewage is by the pod apertures water conservancy diversion, and the no sewage in place, plane spills on the turntable, has improved and has carried out production strictly in line with rules and regulations, and has protected the well head surrounding environment.Because self-sealing rubber core is installed in the inner chamber of turntable, be made of one with using hydraulic swivel head simultaneously, do not need the setting height(from bottom) size on plane separation ground during operation, operation is convenient.The utility model is to be made of one with hydraulic swivel head rotation is self-styled, does not need to use in addition other rotation self-styled during operation again, and expense reduces production costs.When removing instrument, need not hydraulic swivel head is unloaded, only need unload square bushing, remove downhole tool, drilling rod get final product, saves the activity duration, the raising operating efficiency.

Claims (3)

1, a kind of hydraulic swivel head rotating sealing device, it comprises turntable, bolt, self-styled pressing plate etc., it is characterized in that turntable (3) is interior stepped cylindrical cavity, top is the big column cavity, the bottom is the small column cavity, on, following cylindrical cavity forms a convex shoulder, self-sealing rubber core (4) is a hollow-core construction, upper outside has round ring boss, self-sealing rubber core (4) is sat on the convex shoulder that is contained in the turntable (3) by round ring boss on self, and self-styled pressing plate lower end is pressed in the upper-end surface of self-sealing rubber core (4), and self-styled pressing plate is a hollow-core construction, bolt (1) is fastened on the end face of turntable (3) with self-styled pressing plate (2), and self-sealing rubber core is compressed.

2, a kind of hydraulic swivel head rotating sealing device according to claim 1 is characterized in that self-sealing rubber core is the hollow-core construction glue core that rubber is made.

3, a kind of hydraulic swivel head rotating sealing device according to claim 1 is characterized in that self-styled pressing plate (2) makes the inside and outside all directions of matching with the radial engagement place of turntable (3).