CN202900128U - Oil pumping polished rod deflection adjustment packing box - Google Patents

Abstract

The oil pumping polished rod deviation-adjusting packing box is applied to oil extraction well head sealing in oil field. Is characterized in that: the lower end of the packing shell is arranged at the upper part of the alignment flange, and an annular gasket is arranged between the packing shell and the alignment flange; the lower plane of the centering flange is pressed on the annular base of the packing shell, and the diameter of the central hole of the centering flange is larger than that of the outer wall of the packing shell; the upper screw penetrates through a fixing hole of the centering flange to fix the centering flange and the aligning flange together; the lower part of the alignment flange is provided with a lower joint, and the spherical bulge at the lower part of the alignment flange is arranged in a spherical groove at the upper end of the lower joint. The effect is as follows: the polished rod can be centered without eccentric wear, the friction force is reduced, the sealing effect is improved, the service life of the packing is prolonged, the maintenance times are reduced, and the labor intensity of workers is reduced.

Description

The polished rod deflection-regulating packing box

Technical field

The utility model relates to the oil extraction in oil field technical field, and particularly the sealed packing box of production wellhead is a kind of polished rod deflection-regulating packing box.

Background technology

Oil field machinery oil adopts beam pumping unit to drive polished rod and moves back and forth, and carries out swabbing production.Because production tree is crooked, packing box center line and polished rod center line decentraction make the polished rod eccentric wear, and well head runs oil leakage gas.

At present, known packing box is comprised of packing case, Glan, pressure-pad, screw thread, and it is placed in the middle that well head occurs can not adjusting well head when crooked.The diagonal angle friction is serious up and down along the axial line incline direction for polished rod and packing, and nature can make the packing eccentric wear lost of life, causes well head to run oil, gas leakage contaminated environment, frequent packing.The gap that the problem that polished rod and packing box do not occur between two parties is mainly manifested between packing box and the polished rod is inhomogeneous, and the larger close property in position in gap is relatively poor, and less position, gap is larger to the wearing and tearing of sealed packing, forms eccentric wear.When changing sealed packing, the less position packing in gap is difficult for adding, and has had a strong impact on the normal production of oil well, has increased maintenance load and management difficulty.In addition, eccentric packing box is comprised of flange, levelling flange, levelling joint etc. in packing case, Glan, pressure-pad, the accent, to occur can adjusting well head when crooked placed in the middle when well head, but packing box axial line and horizontal plane out of plumb, two axial lines are overlapped, still there is eccentric wear, do not reach real purpose placed in the middle.

The utility model content

The purpose of this utility model is: a kind of polished rod deflection-regulating packing box is provided, packing box axial line and polished rod axial line are overlapped, and vertical with horizontal plane, it is placed in the middle that polished rod remains, save and adjust the loaded down with trivial details work that oil pumper reaches well head centering, the raising sealing effectiveness of reducing friction.

The technical solution adopted in the utility model is: the polished rod deflection-regulating packing box comprises flange in pressure cap, gland, rubber packing, packing housing, pad, the accent, upper bolt, lower screw, levelling flange and lower contact.The packing housing is cylindrical shape, and there is external screw thread packing housing upper end, and packing housing lower end has outer wall that annular base is arranged; The rubber packing of annular is arranged in the packing housing, in the top center hole of packing housing gland is arranged, the packing case top pressure cap that has been threaded, pressure cap compresses gland; It is characterized in that: the lower end of packing housing has annular gasket on the top of levelling flange between packing housing and levelling flange; Flange is annular in the accent, and the lower plane of flange is pressed on the annular base of packing housing in the accent, and the center-hole diameter of flange is greater than the outer diameter of packing housing in the accent; Flange and levelling flange were fixed together during the fixing hole that upper bolt passes flange in the accent will be transferred; Annular flange is arranged at levelling flange top, and downward hemisphere jut is arranged at levelling flange bottom; Lower contact is arranged at the bottom of levelling flange, and the hemisphere jut of described levelling flange bottom is in the spheric groove of lower contact upper end; Lower contact is that the cylindrical shape upper end has annular flange, and there is external screw thread the lower contact lower end.

In order to improve sealing, the copper backing of spheric is arranged between the hemisphere jut of aligning the flange bottom and lower contact upper end spheric groove.

The operating principle of summary polished rod deflection-regulating packing box.Consult Fig. 1.When production tree crooked well head occurs and misaligns, unclamp respectively bolt 7 and lower screw 8.At first make packing housing 4 center lines and polished rod center line on the same straight line, tighten bolt 7.Then at packing housing 4 interior adding rubber packings 3.Adjust at last the inclination angle of levelling flange 9 and lower contact 10, tighten lower screw 8.Reaching the packing box center line overlaps fully with the polished rod center line.Experimental pressure≤5MPa, operating pressure 3MPa adjusts packing and tilts≤5 °.

The beneficial effects of the utility model: the utility model polished rod deflection-regulating packing box, can make between two parties eccentric wear not of polished rod, reduce friction, improve sealing effectiveness, prolong packing application life, reduced maintenance frequency, reduced employee's labour intensity.Overcome production tree crooked after, can only transfer packing and polished rod placed in the middle, can not make the packing box axial line vertical with horizontal plane, namely two axial lines do not overlap, and still have the eccentric wear phenomenon.By original every day of tight packing, packing of a replacing in month.And present 7 days tight one time packing was changed a packing in six months, had prolonged packing 5-6 service time doubly, had reduced maintenance frequency, had improved oil-well time-rate.

Description of drawings

Fig. 1 is the utility model polished rod deflection-regulating packing box structural profile schematic diagram.

Among the figure, the 1-pressure cap, the 2-gland, the 3-rubber packing, 4-packing housing, the 5-pad, flange during 6-transfers, the upper bolt of 7-, screw under the 8-, 9-aligns flange, 10-lower contact.

The specific embodiment

Embodiment 1: take a polished rod deflection-regulating packing box as example, the utility model is described in further detail.

Consult Fig. 1.The utility model polished rod deflection-regulating packing box comprises flange 6, upper bolt 7, lower screw 8, levelling flange 9 and lower contact 10 in pressure cap 1, gland 2, rubber packing 3, packing housing 4, pad 5, the accent.

Packing housing 4 is cylindrical shape, and there is external screw thread packing housing 4 upper ends, and packing housing 4 lower ends have outer wall that annular base is arranged.The rubber packing 3 of annular is arranged in the packing housing 4, in the top center hole of packing housing 4 gland 2 is arranged, packing housing 4 screw top are connected with pressure cap 1, and pressure cap 1 compresses gland 2.The center-hole diameter of rubber packing 3 is 38mm.

The lower end of packing housing 4 has annular gasket 5 on the top of levelling flange 9 between packing housing 4 and levelling flange 9.Flange 6 is annular in the accent, and the lower plane of flange 6 is pressed on the annular base of packing housing 4 in the accent, and the center-hole diameter of flange 6 is greater than the outer diameter 8mm of packing housing 4 in the accent.Flange 6 and levelling flange 9 were fixed together during the fixing hole that upper bolt 7 passes flange 6 in the accent will be transferred.Annular flange is arranged at levelling flange 9 tops, and downward hemisphere jut is arranged at levelling flange 9 bottoms.Lower contact 10 is arranged at the bottom of levelling flange 9, and the hemisphere jut of described levelling flange 9 bottoms is in lower contact 10 upper end spheric grooves.Lower contact 10 has annular flange for the cylindrical shape upper end, and there is external screw thread lower contact 10 lower ends.The red copper pad that spheric is arranged between the hemisphere jut of aligning flange 9 bottoms and lower contact 10 upper end spheric grooves.

Claims (2)

1. A packing box for adjusting the deflection of an oil pumping polished rod, including a pressure cap (1), a gland (2), a rubber packing (3), a packing shell (4), a gasket (5), and a centering method flange (6), upper bolt (7), lower screw (8), adjusting flange (9) and lower joint (10); the packing shell (4) is cylindrical, and the upper end of the packing shell (4) There are external threads, the lower end of the packing shell (4) has an outer wall and a ring-shaped base; the packing shell (4) has a ring-shaped rubber packing (3), and the top center hole of the packing shell (4) has a pressure The cover (2), the top of the packing shell (4) is threadedly connected with a pressure cap (1), and the pressure cap (1) presses the gland (2); it is characterized in that: the lower end of the packing shell (4) is adjusted On the upper part of the positive flange (9), there is an annular gasket (5) between the packing shell (4) and the adjusting flange (9); the adjusting flange (6) is circular, and the adjusting flange ( 6) is pressed against the annular base of the packing shell (4), and the center hole diameter of the centering flange (6) is larger than the outer wall diameter of the packing shell (4); the upper bolt (7) passes through the The fixing hole of the middle flange (6) fixes the middle flange (6) and the adjustment flange (9) together; the upper part of the adjustment flange (9) has an annular flange, and the lower part of the adjustment flange (9) has a downward The lower joint (10) is arranged at the bottom of the adjustment flange (9), and the spherical protrusion at the bottom of the adjustment flange (9) is in the spherical groove at the upper end of the lower joint (10); the lower joint (10) ) is that the cylindrical upper end has an annular flange, and the lower joint (10) lower end has external threads. the 2. The deflection adjustment packing box for oil pumping polished rods according to claim 1, characterized in that there is a spherical protrusion between the lower spherical protrusion of the adjustment flange (9) and the spherical groove at the upper end of the lower joint (10). copper gaskets. the

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