CN104963647A - Oil pumping unit wellhead packing box - Google Patents

Abstract

The invention discloses an oil pumping unit wellhead packing box, and belongs to the technical field of oil pumping unit wellhead auxiliary equipment of an oil field. In order to solve problems in the prior art that operating workers need to use screwdrivers and other auxiliary tools to put packing or take the packing out of an annular space between an oil pumping unit polish rod and the packing box when changing the packing, and the packing need great efforts to put in or take out, and the workers easily get injury. Provided is the oil pumping unit wellhead packing box, comprising a gland, a base, an outer cylinder, and a split inner cylinder. The outer cylinder is respectively connected with the gland and the base by threads. The split inner cylinder is in the outer cylinder. The split inner cylinder is formed by a left split inner cylinder basic body and a right split inner cylinder basic body. The middle of the formed split inner cylinder is in a cylindrical shape. The upper end and the lower end of the split inner cylinder are in a circular cone cylindrical shape which inclines inward. The outer side surface of a circular cone cylinder forms a split inner cylinder upper contact surface and a split inner cylinder lower contact surface. The inner wall of the outer cylinder is provided with an outer cylinder contact surface which is abutted against the split inner cylinder upper contact surface. The inner wall of the base is provided with a base contact surface which is abutted against the split inner cylinder lower contact surface. The packing box is used to support the use of installed packing of an oil pumping unit of an oil field.

Description

Oil pumping machine well head packing box

Technical field

The present invention is specifically related to a kind of oil pumping machine well head packing box, belongs to oil-field oil pumper technical field of auxiliary equipment.

Background technology

Packing is also named airtight and watertight padding, usually passes through compression molding by the flexible high molecular material such as rubber or polyurethane, is filled in seal chamber and packing box, thus realizes sealing.In oil-field oil pumper, usual employing is filled in packing in packing box and polished rod closely cooperates to reach the object preventing crude oil leakage, but in actual use, because the packing in packing box needs often to change, the packing box main body of current use mostly is the columnar structured of entirety, operator needs with aids such as screwdrivers, packing to be put into or taken out from the narrow and small annular space oil-extractor polish-rod and packing box, very effort and easily injured.

Summary of the invention

Therefore, the present invention is directed to and to need when operator in prior art changes packing with instruments such as screwdrivers packing to be put into from the annular space oil pumper and packing box or take out, require great effort very much and hold vulnerable problem, a kind of oil pumping machine well head packing box is provided, comprise gland, base, urceolus, split inner core, urceolus is threaded respectively with gland and base, split inner core is placed in outer barrel, split inner core is formed by two, left and right split inner core matrix combination, be cylindrical shape in the middle of split inner core after combination, the upper and lower two ends of split inner core are intilted round platform tubular, the lateral surface of frustum cone cylinder to form on split inner core contact surface under contact surface and split inner core, outer tube inner wall is provided with the urceolus contact surface bonded to each other with contact surface on split inner core, base inner wall is provided with the base contacts face bonded to each other with contact surface under split inner core.

Beneficial effect of the present invention is: use oil pumping machine well head packing box of the present invention, operator can be easy to install or unload packing by the Split type structure of split inner core, during owing to urceolus being put into base and screwing, squeezing action between the upper and lower contact surface of split inner core and urceolus contact surface and base contacts face can make split inner core left and right two parts combine closely, thus ensureing the close contact between packing and packing box and polished rod, the overall structure of urceolus can ensure that the overall performance of packing box is as unaffected in vertical centering etc.

Accompanying drawing explanation

Fig. 1 is the structural representation of oil pumping machine well head packing box of the present invention;

Fig. 2 is the structural representation of split inner core;

Fig. 3 is the top view of Fig. 2.

Reference numeral is as follows:

1, gland;

2, base;

3, urceolus;

4, split inner core;

5, split inner core matrix;

6, contact surface on split inner core;

7, contact surface under split inner core;

8, urceolus contact surface;

9, base contacts face;

10, packing;

11, oil-extractor polish-rod.

Detailed description of the invention

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described:

As Fig. 1, shown in Fig. 2 and Fig. 3, a kind of oil pumping machine well head packing box, comprise gland 1, base 2, urceolus 3, split inner core 4, urceolus 3 is threaded respectively with gland 1 and base 2, it is inner that split inner core 4 is placed in urceolus 3, split inner core 4 is combined by two, left and right split inner core matrix 5, be cylindrical shape in the middle of split inner core 4 after combination, split inner core about 4 two ends are intilted round platform tubular, the lateral surface of frustum cone cylinder to form on split inner core contact surface 7 under contact surface 6 and split inner core, outer tube inner wall is provided with the urceolus contact surface 8 bonded to each other with contact surface on split inner core, base inner wall is provided with the base contacts face 9 bonded to each other with contact surface under split inner core.

When taking out waste and old packing 10, first gland 1 outwards being screwed out to appropriate location, rotating urceolus 3 to disengaging base 2, and be fixed to appropriate location on oil-extractor polish-rod 11, then taken away by split inner core 4, waste and old packing 10 is completely outside exposed, it is taken off one by one with hand or pliers.New packing 10 is installed more simple, whole packing 10 to be socketed on oil-extractor polish-rod 11 and to be placed on base 2, two the split inner core matrixes 5 forming split inner core 4 are surrounded outside packing 10, split inner core 4 is placed in base 2, under split inner core, contact surface 7 contacts with base contacts face 9 and split inner core 4 can be made to obtain preliminarily stabilised, urceolus 3 to be enclosed within outside split inner core 4 and to screw with low seat 2, squeezing action between split inner core about 4 contact surface and urceolus contact surface 8 and base contacts face 9 can make split inner core about 4 two parts combine closely, finally screw in gland 1 to suitable tightness, gland 1 pair of packing 10 plays squeezing action.

As preferred embodiment, split inner core 4 is combined by two, the left and right separated along shaft section shape identical split inner core matrix 5, and such mating face is minimum, and oil leakage phenomenon can be avoided to occur, and installing/dismounting is also easy simultaneously.

As preferred embodiment, on split inner core, under contact surface 6 and split inner core, the angle of inclination of contact surface 7 is 30 degree to 60 degree, in the scope of 30 degree to 60 degree, the squeezing effect that the Contact due to contact surface produces is best, and packing 10 is combined the tightst with packing box.

As preferred embodiment, two split inner core matrix bonding surface places are provided with weather strip, can prevent the leakage of oil of bonding surface place.

The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (4)

1. an oil pumping machine well head packing box, comprise gland, base, urceolus, split inner core, urceolus is threaded respectively with gland and base, split inner core is placed in outer barrel, it is characterized in that, described split inner core is formed by two, left and right split inner core matrix combination, be cylindrical shape in the middle of split inner core after combination, the upper and lower two ends of split inner core are intilted round platform tubular, the lateral surface of frustum cone cylinder to form on split inner core contact surface under contact surface and split inner core, described outer tube inner wall is provided with the urceolus contact surface bonded to each other with contact surface on split inner core, described base inner wall is provided with the base contacts face bonded to each other with contact surface under split inner core.

2. oil pumping machine well head packing box as claimed in claim 1, it is characterized in that, described split inner core is formed by two, the left and right separated along shaft section shape identical split inner core matrix combination.

3. oil pumping machine well head packing box as claimed in claim 1, is characterized in that, on described split inner core, under contact surface and split inner core, the angle of inclination of contact surface is 30 degree to 60 degree.

4. oil pumping machine well head packing box as claimed in claim 1, it is characterized in that, described two split inner core matrix bonding surface places are provided with weather strip.