CN214145435U - Wellhead double-seal efficient filling device - Google Patents

Abstract

The utility model discloses a high-efficient tucker of well head double containment relates to oil field wellhead assembly and production tree accessory technical field, and it comprises packing gland, compensating spring, packing, translation packing box and seal housing. The utility model discloses a high-efficient tucker of well head double containment, its beneficial effect as follows: the packing box has a reasonable structure, and can achieve the effects of pressing and sealing under the action of the packing and the compensating spring, so that the period and the frequency of replacing the packing are prolonged; when the polished rod is eccentric, the polished rod can be translated and offset-adjusted, so that the problem that the polished rod is easy to break due to bending stress caused by local bending can be solved.

Description

Wellhead double-seal efficient filling device

The technical field is as follows:

the utility model relates to an oil field wellhead assembly and production tree accessory technical field, concretely relates to high-efficient tucker of well head double containment.

Background art:

at present, the solution that well head double containment high-efficient stuffer that uses on oil field wellhead assembly and the oil recovery tree adopted to the eccentric wear between beam-pumping unit polished rod and the well head double containment high-efficient stuffer is that the bulb rotates the tuningout, the problem that exists is, use the bulb to rotate to the part more than it as the center, limited eccentric wear problem between packing and the polished rod of having solved, what come along has caused the polished rod in the bending of this part (like figure 4), the local bending stress has been formed, the life of sucker rod has been reduced, cause disconnected pole easily, and the problem of packing eccentric wear is not fine solution, it is still high to change the frequency.

The utility model has the following contents:

the utility model aims at overcoming the shortcomings of the prior art and providing a wellhead double-sealing high-efficiency filler.

The utility model discloses a well head double containment high efficiency stuffer, it is by packing gland, compensating spring, packing, translation packing box and sealed casing to constitute, the inside of packing gland be equipped with the packing clamping ring, the lower edge of going up the packing clamping ring is equipped with hanging wall root press ring bulge loop, the inside of hanging wall root press ring is equipped with supplementary spring I, the top of supplementary spring I offsets with the packing gland, its bottom offsets with hanging wall root press ring bulge loop, the inner wall of packing gland and the outer wall threaded connection of translation packing box, the inside of translation packing box is equipped with packing I, the inner wall of translation packing box is equipped with translation packing box bulge loop, the top of packing I offsets with hanging wall root press ring, its bottom offsets with packing box bulge loop, on the outer wall of translation packing box, the below of translation packing box bulge loop is equipped with the circular bead, the top of circular bead is equipped with the steel ball groove, the steel ball groove is equipped with the circular bead on the steel ball groove, the inside of spring groove, the spring groove is of a lower opening structure, a replenishing spring II is arranged in the spring groove, a gasket and a framework wear-resistant packing are sequentially arranged at the opening of the spring groove from inside to outside, the top of the replenishing spring II abuts against the inner wall of the spring groove, the bottom of the replenishing spring II abuts against the gasket, a translational sealing backing ring is arranged at the bottom of the framework wear-resistant packing, a sealing shell is arranged at the bottom of the translational sealing backing ring, the outer wall of the sealing shell is in threaded connection with the inner wall of a steel ball pressing cap, the top wall inside the steel ball pressing cap abuts against a steel ball, a sealing shell convex ring is arranged at the inner wall of the sealing shell, the top of the translational sealing backing ring abuts against a framework wear-resistant packing, the bottom of the translational sealing backing ring abuts against the top of the sealing shell convex ring, a lower packing pressing ring is arranged at the lower part of the sealing shell and inside the sealing shell, a packing II is arranged at the lower part of the lower packing pressing ring, a variable buckle joint is in threaded connection with the inner wall of the sealing shell, a variable buckle joint convex ring is arranged at the inner wall of the variable buckle joint, the top of packing II offsets with lower packing pressure ring, its bottom offsets with becoming the joint bulge loop, becomes on the outer wall of joint, the below of joint bulge loop is equipped with the annular groove, is equipped with the bolt on the outer wall of seal housing, and the bolt stretches into in the annular groove.

As a further improvement, O-shaped sealing rings are arranged between the translational sealing gasket ring and the sealing shell and between the variable buckle joint and the sealing shell.

As a further improvement of the utility model, the outer diameter of the spring groove opening part is larger than the outer diameter of the bottom end of the translation sealing gasket ring.

The utility model discloses a high-efficient tucker of well head double containment, its beneficial effect as follows:

1. the packing box has a reasonable structure, and can achieve the effects of pressing and sealing under the action of the packing and the compensating spring, so that the period and the frequency of replacing the packing are prolonged;

2. when the polished rod is eccentric, the polished rod can be translated and offset-adjusted, so that the problem that the polished rod is easy to break due to bending stress caused by local bending can be solved.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the translation gasket ring of the present invention;

fig. 3 is a schematic structural view of the translational packing box ring of the present invention;

FIG. 4 is a schematic diagram of a structure for comparing translation and rotation misalignment;

fig. 5 is a schematic view of the installation of the polish rod of the present invention.

In the figure: 1 packing gland, 2 compensating spring I, 3 packing I, 4 translation packing boxes, 5 steel ball pressure caps, 6 steel balls, 7 compensating spring II, 8 gaskets, 9 skeleton wear-resistant packing, 10 translation sealing backing rings, 11O-shaped sealing rings, 12 sealing shells, 13 lower packing pressure rings, 14 packing II, 15 change buckle joints, 16 upper packing pressure rings, 17 translation packing box convex rings, 18 shoulders, 19 sealing shell convex rings, 20 annular grooves, 21 bolts, 22 upper packing root pressure ring convex rings, 23 change buckle joint convex rings, 24 spring grooves and 25 polished rods.

The specific implementation mode is as follows:

as shown in figure 1, the utility model relates to a well mouth double-seal high-efficiency filler, which comprises a packing gland 1, a compensating spring, a packing, a translational packing box 4 and a sealing shell 12, wherein an upper packing press ring 16 is arranged inside the packing gland 1, an upper packing press ring convex ring 22 is arranged on the lower edge of the upper packing press ring 16, a supplement spring I2 is arranged inside the upper packing press ring 16, the top of the supplement spring I2 is abutted against the packing gland 1, the bottom of the supplement spring is abutted against the upper packing press ring convex ring 22, the inner wall of the packing gland 1 is in threaded connection with the outer wall of the translational packing box 4, a packing I3 is arranged inside the translational packing box 4, a translational packing box convex ring 17 is arranged on the inner wall of the translational packing box 4, the top of the packing I3 is abutted against the upper packing press ring 16, the bottom of the packing I3 is abutted against the translational packing box convex ring 17, a circular bead 18 is arranged on the outer wall of the translational packing box 4 and below the translational packing box convex ring 17, the top of the shoulder 18 is provided with a steel ball groove, the steel ball groove is provided with a steel ball 6, the shoulder 18 is internally provided with a spring groove, the spring groove is of a lower opening structure, a supplementary spring II 7 is arranged in the spring groove, the opening of the spring groove is sequentially provided with a gasket 8 and a framework wear-resistant packing 9 from inside to outside, the top of the supplementary spring II 7 is abutted against the inner wall of the spring groove, the bottom of the supplementary spring II is abutted against the gasket 8, and the bottom of the framework wear-resistant packing 9 is provided with a translational sealing backing ring 10; because the polished rod is in soft contact with the packing I, and the stress area between the polished rod and the packing I assembly is larger than the contact area between the framework wear-resistant packing 9 and the translational sealing backing ring 10, under the condition of the same friction coefficient, when the polished rod is eccentric, the radial force generated between the polished rod and the packing I assembly is larger than the plane radial friction force between the framework wear-resistant packing 9 and the translational sealing backing ring 10, so that the translational motion between the framework wear-resistant packing 9 and the translational sealing backing ring 10 can be ensured to be generated firstly when the polished rod is eccentric, and therefore, the problem that the polished rod is easy to break due to bending stress generated by local bending can be solved by translational motion deviation adjustment; the bottom of a translational seal backing ring 10 is provided with a seal shell 12, the outer wall of the seal shell 12 is in threaded connection with the inner wall of a steel ball pressing cap 5, the top wall inside the steel ball pressing cap 5 abuts against a steel ball 6, the inner wall of the seal shell 12 is provided with a seal shell convex ring 19, the top of the translational seal backing ring 10 abuts against a framework wear-resistant packing 9, the bottom of the translational seal backing ring abuts against the top of the seal shell convex ring 19, the lower part of the seal shell convex ring 19 and the inside of the seal shell 12 are provided with a lower packing press ring 13, the lower part of the lower packing press ring 13 is provided with a packing II 14, the inner wall of the seal shell 12 is in threaded connection with a buckle change connector 15, the inner wall of the buckle connector 15 is provided with a buckle change connector convex ring 23, the top of the packing II 14 abuts against the lower packing press ring 13, the bottom of the packing II is abutted against the buckle connector convex ring 23, an annular groove 20 is arranged on the outer wall of the buckle connector 15 and below the buckle connector convex ring 23, the outer wall of the seal shell 12 is provided with a bolt 21, the bolt 21 extends into the annular recess 20.

O-shaped sealing rings 11 are arranged between the translational sealing gasket ring 10 and the sealing shell 12 and between the buckle changing joint 15 and the sealing shell 12.

The outer diameter D of the opening of the spring groove 24 is larger than the outer diameter D of the bottom end of the translational gasket ring 10 (see fig. 2 and 3). Because the diameter D of the excircle of the translational seal gasket ring 10 is greater than the diameter D of the contact surface between the framework wear-resistant packing 9 and the translational seal gasket ring 10, when the translational seal gasket ring 10 is in a medium with pressure, according to the formula F = P × Δ S (F is the integral stress, Δ S is the seal area difference, and P is the medium pressure), the translational seal gasket ring 10 is subjected to an upward force, so that the translational seal gasket ring 10 in the medium with pressure has a tendency of moving upward under the action of the upward force F, and has a compensation effect on the wear of the framework wear-resistant packing 9.

When the device is installed, the polish rod penetrates through the central hole of the wellhead double-seal high-efficiency filler (see figure 4). When the polished rod is eccentric, the radial force can push the translational packing box 4, the framework wear-resistant packing 9 and components thereof to do contact plane motion with the translational sealing backing ring 10 within a certain range and keep sealing under the action of the framework wear-resistant packing 9, when the framework wear-resistant packing 9 is worn due to translational friction with the translational sealing backing ring 10, the supplementary spring II can release the pretightening force during installation, push the framework wear-resistant packing 9 to feed along the axial direction, and keep the sealing state between the framework wear-resistant packing 9 and the translational sealing backing ring 10, so that the period and the frequency for replacing the framework wear-resistant packing 9 are prolonged; similarly, when packing I has wearing and tearing, supplementary spring I under the pretightning force effect can release the stroke, and the axial is promoting packing I to radial feed, maintains the state that compresses tightly between packing I and the polished rod, keeps sealed effective to the cycle and the frequency of packing are changed in the extension.

Claims (3)

1. A wellhead double-sealing efficient filler is composed of a packing gland (1), a compensating spring, a packing, a translational packing box (4) and a sealing shell (12), and is characterized in that an upper packing press ring (16) is arranged inside the packing gland (1), a convex ring (22) of the upper packing press ring (16) is arranged on the lower edge of the upper packing press ring (16), a supplementing spring I (2) is arranged inside the upper packing press ring (16), the top of the supplementing spring I (2) abuts against the packing gland (1), the bottom of the supplementing spring I (2) abuts against the upper packing press ring convex ring (22), the inner wall of the packing gland (1) is in threaded connection with the outer wall of the translational packing box (4), a packing I (3) is arranged inside the translational packing box (4), a translational packing box convex ring (17) is arranged on the inner wall of the translational packing box (4), the top of the packing I (3) abuts against the upper packing press ring, The bottom of the packing box is abutted against a translational packing box convex ring (17), a shoulder (18) is arranged on the outer wall of the translational packing box (4) and below the translational packing box convex ring (17), a steel ball groove is arranged at the top of the shoulder (18), a steel ball (6) is arranged on the steel ball groove, a spring groove (24) is arranged inside the shoulder (18), the spring groove (24) is of a lower opening structure, a supplementary spring II (7) is arranged in the spring groove (24), a gasket (8) and a framework wear-resistant packing (9) are sequentially arranged at the opening of the spring groove from inside to outside, the top of the supplementary spring II (7) is abutted against the inner wall of the spring groove, the bottom of the supplementary spring II is abutted against the gasket (8), a translational sealing gasket ring (10) is arranged at the bottom of the framework wear-resistant packing (9), a sealing shell (12) is arranged at the bottom of the translational sealing gasket (10), the outer wall of the sealing shell (12) is in threaded connection with the inner wall of the steel ball pressing cap (5), and, The top wall of the inner part of the steel ball pressing cap (5) is abutted against the steel ball (6), the inner wall of the sealing shell (12) is provided with a sealing shell convex ring (19), the top part of the translational sealing backing ring (10) is abutted against the framework wear-resistant packing (9), the bottom part of the translational sealing backing ring is abutted against the top part of the sealing shell convex ring (19), the lower part of the sealing shell convex ring (19) and the inner part of the sealing shell (12) are provided with a lower packing pressing ring (13), the lower part of the lower packing pressing ring (13) is provided with a packing II (14), the inner wall of the sealing shell (12) is in threaded connection with a buckle change joint (15), the inner wall of the buckle change joint (15) is provided with a buckle change joint convex ring (23), the top part of the packing II (14) is abutted against the lower packing pressing ring (13), the bottom part of the packing II is abutted against the buckle change joint convex ring (23), the outer wall of the buckle change joint (15) is provided with an annular groove (20) below the buckle change joint convex ring (23), the outer wall of the sealing shell (12) is provided with a bolt (21), and the bolt (21) extends into the annular groove (20).

2. A wellhead dual-seal high-efficiency filler according to claim 1, characterized in that O-ring seals (11) are arranged between the translational packing ring (10) and the seal housing (12) and between the snap-fit joint (15) and the seal housing (12).

3. A wellhead dual seal high efficiency packer as claimed in claim 1, wherein the outside diameter at the opening of the spring groove (24) is larger than the outside diameter at the bottom end of the translational packing ring (10).

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