CN211009886U

CN211009886U - Tension adjustment double-roller set deviation rectifying packing box

Info

Publication number: CN211009886U
Application number: CN201922109556.5U
Authority: CN
Inventors: 张立杰; 李想; 王庆森
Original assignee: Mudanjiang Linhai Petroleum Fishing Tool Co ltd
Current assignee: Mudanjiang Linhai Petroleum Fishing Tool Co ltd
Priority date: 2019-11-30
Filing date: 2019-11-30
Publication date: 2020-07-14
Anticipated expiration: 2029-11-30

Abstract

The utility model provides a tension adjustment double-roller group packing box of rectifying, has adopted built-in double-roller group and bulb to turn to structural design, includes: packing box main part, rubber packing, go up the gland, the lower clutch, the bulb connects, annular clamp, the lower gland, first roller train and second roller train, through forcing the centering to the oil recovery polished rod to rectify, improve the sealed effect of oil recovery polished rod and rubber packing, utilize bulb steering structure between top connection and the bulb joint to carry out the circulation control to oil recovery polished rod elastic tension, avoid producing the friction hard spot, alleviate the destruction of oil recovery polished rod surface finish and the friction loss of rubber packing, be applied to in the oil recovery production, both can improve the centering precision of oil recovery polished rod, improve sealed effect, simultaneously can also improve the life of oil recovery polished rod, reduce packing frictional strength, reduce oil recovery production consumption, eliminate the potential safety hazard, practice thrift oil recovery manufacturing cost, improve oil recovery production efficiency.

Description

Tension adjustment double-roller set deviation rectifying packing box

Technical Field

The utility model relates to a packing box, in particular to tension is adjusted two rollers group packing box of rectifying.

Background

The packing box is one of the key parts of the Christmas tree of the mechanical oil production well, and the packing sealing material is filled in the box body to seal the oil production polished rod and prevent oil and water from leaking in the oil production process. At present, in oil field production, the packing box oil leak phenomenon is still comparatively general, leads to this unfavorable phenomenon to take place the existing production tree and builds reasons in the aspects such as precision, packing sealing material quality, also has the influence of oil reservoir pressure situation and crude oil and well fluid chemical properties, but more importantly the polished rod can not accurate centering then be the main reason that leads to the packing box oil leak phenomenon can't solve at all. Under the operating condition, because the donkey head of the oil production tree in the oil field generally is difficult to keep the accurate vertical motion trail, therefore, the oil production polished rod has the radial swing phenomenon of certain degree in the up and down process, can not keep the central position of the packing box aligned all the time, the oil production polished rod has the eccentric wear phenomenon with the packing sealing material, and the packing produces wearing and tearing to the oil production polished rod to reduce sealed effect, lead to the profit to reveal. Although the packing boxes used in the existing production have a certain deviation adjusting function, when the deviation adjusting amount is large, the radial swing motion of the oil extraction polished rod is limited by forced limiting, the oil extraction polished rod is inevitably subjected to elastic tension and accompanied with certain elastic deformation, and the existence of the elastic tension and the deformation can cause the packing boxes to form local friction hard points, so that the friction strength is increased, the damage of the surface smoothness of the oil extraction polished rod in the area and the abrasion of packing materials are caused, the problem of oil-water leakage of the packing boxes cannot be solved, the oil extraction polished rod needs to be frequently stopped for replacing the oil extraction polished rod, the packing materials are frequently replaced, the problems of high cost consumption, high labor intensity, heavy environmental pollution, low operation efficiency and high production cost still exist. Therefore, the structure of the packing box must be improved, so that the centering precision of the oil extraction polished rod is further improved, the service life of the oil extraction polished rod is prolonged, the service cycle of packing materials is prolonged, the labor intensity and potential safety hazards are reduced, the oil extraction production cost is reduced, and the oil extraction production efficiency is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the utility model provides a tension adjustment double-roller group packing box of rectifying improves oil recovery polished rod centering precision, reduces packing frictional strength, improves the sealed effect of packing, reduces oil recovery manufacturing cost, improves oil recovery work efficiency.

The utility model provides a tension adjustment double-roller group packing box of rectifying, includes: packing box main part 2, go up gland 1, rubber packing 7, lower clutch 3, ball joint 4, annular clamp 5, lower gland 6, first roller train 8 and second roller train 9.

The upper part of the packing box main body 2 is fixedly connected with the upper gland 1, an accommodating space of the rubber packing 7 is formed between the packing box main body 2 and the upper gland 1 in a combined mode, and the rubber packing 7 is accommodated in the accommodating space; the lower part of the packing box main body 2 is fixedly connected with the lower joint 3, and the first roller set 8 is arranged in an inner space formed by combining the packing box main body 2 and the lower joint 3; the lower part of the lower joint 3 is connected with the ball joint 4 through the structural matching of the annular hoop 5 and the lower gland 6, the second roller set 9 is arranged in the inner space formed by the combination of the lower joint 3 and the ball joint 4, and the second roller set 9 is installed on the ball joint 4, wherein: lower clutch 3 and annular clamp 5 with ball joint 4 has the connection sphere of mutually supporting, with the help of connect the sphere, lower clutch 3 can be relative in 360 within ranges of horizontal circumference ball joint 4 longitudinal axis direction produces the deflection, 6 ring covers of lower gland are in on the ball joint 4, fixed connection is in on the lower clutch 3, annular clamp 5 is inlayed ball joint 4 with between the lower gland 6, it is right concurrently ball joint 4's the biggest deflection angle retrains spacing effect.

The first roller group 8 and the second roller group 9 have the same design structure and respectively comprise an annular chassis 17, a plurality of fixed limiting frames 16 and rollers 13 with the same number, and the number of the fixed limiting frames 16 and the rollers 13 is preferably 2-6; the fixed limiting frames 16 and the rollers 13 are arranged on the annular chassis 17 at equal intervals along the circumference, wherein the fixed limiting frames 16 are fixedly installed on the annular chassis 17, the rollers 13 are respectively installed between two adjacent fixed limiting frames 16 by using bolt shafts 14, and the rollers 13 can rotate relative to the bolt shafts 14 and are restrained and positioned by the fixed limiting frames 16 in the axial direction; the rollers 13 are uniformly distributed and combined along the circumference, circular arc-shaped concave ring grooves arranged on the annular circumferential surface of the roller body are respectively formed at the axle center positions of the first roller group 8 and the second roller group 9 to form a circular section combined hole 15, the diameter of the circular section combined hole 15 is the same as that of the oil extraction polished rod, when the oil extraction polished rod passes through the circular section combined hole 15, the rollers 13 simultaneously abut against the oil extraction polished rod on the surface, the oil extraction polished rod is limited and corrected in the circumferential direction, the circular section combined hole is in circular line contact with the oil extraction polished rod, the whole package is held on the circumference of the oil extraction polished rod, the oil extraction polished rod is accurately and stably limited and corrected, and the more the rollers 13 are arranged, the higher the limiting and correcting accuracy and stability are.

In order to guarantee the operating conditions of the first roller set 8 and the second roller set 9 and improve the service life, the packing box main body 2 and the inner space formed by combination between the upper gland 1 and the inner space formed by combination between the lower joint 3 and the ball joint 4 are preferably sealed, the upper gland 1 and the connecting surface between the packing box main body 2 are provided with a first sealing ring 10, the packing box main body 2 and the connecting surface between the lower joint 3 are provided with a second sealing ring 11, and the lower joint 3 and the connecting spherical surface between the ball joint 4 are provided with a third sealing ring 12.

In order to increase the dimension of the roller 13 for limiting and correcting the oil extraction polished rod along the circumferential direction, and further improve the accuracy and stability of limiting and correcting, the first roller set 8 and the second roller set 9 are preferably arranged in a staggered manner along the circumference with the central axis as the center of the circle, so that the roller 13 in the first roller set 8 and the roller 13 in the second roller set 9 are arranged in a mutual manner on the longitudinal projection plane, the complementation of the limiting direction of the roller 13 is realized, and the limiting dimension of the oil extraction polished rod is increased by 1 time.

The installation and the working principle of the tension adjusting double-roller-group deviation rectifying packing box are as follows: the upper gland 1, the packing box main body 2 and the lower joint 3 are fixedly connected into a whole, a circular section combined hole 15 in the first roller set 8 is controlled to be precisely aligned with a central hole formed in the rubber packing 7, the lower end of the ball joint 4 is fixedly arranged on a wellhead device of a production well, the upper end of the ball joint is movably connected with the spherical surface of the lower joint 3, the second roller set 9 is arranged on the ball joint 4, the second roller set 9 is kept at the central position of the connecting spherical surface, and the circular section combined hole 15 of the second roller set 9 is controlled to be in alignment with the circular section combined hole 15 in the first roller set 8 and the central hole formed in the rubber packing 7 and precisely aligned with each other; during oil extraction, the oil extraction polish rod sequentially penetrates through the rubber packing 7, the first roller set 8 and the second roller set 9 are forced to center and correct deviation in a limiting mode, elastic tension can be generated and accompanied with certain elastic deformation, when the deviation correction amount is large, the generated elastic tension is large, under the action of the elastic tension, the lower joint 3 and the packing main body 2 and the upper gland 1 which are connected with the lower joint 3 into a whole can generate adaptive deflection by taking a connecting spherical surface as an axis, the elastic tension is adjusted, the elastic tension of the oil extraction polish rod and the elastic deformation formed along with the elastic tension are released and restored, a hard friction point between the oil extraction polish rod and the rubber packing 7 is avoided, and the damage of the oil extraction polish rod and the friction loss of the rubber packing 7 are obviously reduced, the service life is prolonged, the replacement frequency is reduced, when the elastic tension is released or reduced, the elastic deformation is reduced, the lower joint 3, the packing main body 2 and the upper gland 1 are driven by the oil extraction polished rod to return to the initial positions, and the automatic circulation adjustment of the elastic tension of the oil extraction polished rod is realized; in the automatic circulation adjusting process, because the second roller set 9 is located at the center point of the deflection spherical surface, the two circular section combination holes 15 on the first roller set 8 and the second roller set 9 and the center hole on the rubber packing 7 can be always kept on the same straight line, that is, the oil extraction polish rod always keeps an accurate centering and deviation rectifying state, and the dynamic sealing between the oil extraction polish rod and the rubber packing 7 is good.

The utility model has the advantages that: the design of a built-in double-roller group and a ball head steering structure is adopted, the double-roller group is utilized to forcibly center and correct the oil extraction polished rod, the ball head steering structure between an upper joint and a ball head joint is utilized to automatically and circularly adjust the elastic tension of the oil extraction polished rod, the elastic tension on the oil extraction polished rod and the associated elastic deformation are periodically released and restored while the alignment and the correction are always kept, a friction hard spot is avoided, the damage to the oil extraction polished rod and the abrasion of a rubber packing are reduced, the centering precision of the oil extraction polished rod and the rubber packing can be improved when the double-roller group and ball head steering structure are applied to oil extraction production, the sealing effect between the oil extraction polished rod, the rubber packing, a packing box main body, an upper gland and the rubber packing can be improved, the service life of the oil extraction polished rod can be prolonged, the service cycle of the, eliminates potential safety production hazards, saves the production cost of oil extraction and improves the production efficiency of oil extraction.

Drawings

Fig. 1 is a schematic structural diagram of a tension-adjusting double-roller-group deviation-rectifying packing box.

Fig. 2 and a sectional view of a section a-a in fig. 1.

Fig. 3, a schematic view of a roller group structure.

Detailed Description

The following takes a tension adjusting and deviation rectifying packing box with two roller sets formed by combining 4 rollers as an example, and the technical scheme of the utility model claimed is further explained by combining the accompanying drawings.

A tension adjustment double-roller-group deviation rectifying packing box is shown in figure 1 and comprises a packing box main body 2, an upper gland 1, a rubber packing 7, a lower joint 3, a ball joint 4, an annular clamp 5, a lower gland 6, a first roller group 8 and a second roller group 9.

The upper part of the packing box main body 2 is fixedly connected with the upper gland 1 through threads, the lower part of the packing box main body 2 is fixedly connected with the lower joint 3 through threads, and the lower part of the lower joint 3 is connected with the ball joint 4 through the structural matching of the annular clamp 5 and the lower gland 6, wherein the annular clamp 5 is embedded and clamped between the lower joint 3 and the lower gland 6, and the lower gland 6 is fixedly connected with the lower joint 3 through threads; meanwhile, a first sealing ring 10 is arranged on a connecting surface between the upper gland 1 and the packing box main body 2, a second sealing ring 11 is arranged on a connecting surface between the packing box main body 2 and the lower joint 3, and a third sealing ring 12 is arranged on a connecting spherical surface between the lower joint 3 and the ball joint 4.

The first roller group 8 and the second roller group 9, as shown in fig. 2 and fig. 3, are respectively composed of a chassis 17, a bolt shaft 14, a fixed limiting frame 16 and rollers 13, the bolt shaft 14, the fixed limiting frame 16 and the rollers 13 are all provided with 4, the rollers 13 are uniformly distributed and combined along the circumference, circular arc-shaped concave ring grooves provided on the annular circumference surface of the roller body respectively form a circular section combined hole 15 at the axial center positions of the first roller group 8 and the second roller group 9, the diameter of the circular section combined hole 15 is the same as that of the oil extraction polished rod, when the oil extraction polished rod passes through the circular section combined hole 15, the 4 rollers 13 abut against the surface of the oil extraction polished rod, the oil extraction polished rod is limited and corrected in the circumferential direction, and line contact with the oil extraction polished rod is formed, the packing and holding characteristics are strong, and the correction precision and the correction stability are sufficient; meanwhile, the first roller set 8 and the second roller set 9 are arranged along the circumference in a staggered manner by 45 degrees by taking the central shaft as the center of a circle, so that the rollers 13 in the first roller set 8 and the second roller set 9 are arranged on the section projection of the oil extraction polished rod at intervals, the integral limiting and deviation rectifying dimension is improved from 4 dimensions to 8 dimensions, the complementation of a limiting structure is achieved, and the limiting and deviation rectifying accuracy and stability are further improved.

Claims

1. The utility model provides a tension is adjusted double-roller group and is rectified packing box which characterized in that includes: the packing box comprises a packing box main body (2), a rubber packing (7), an upper gland (1), a lower joint (3), a ball joint (4), an annular hoop (5), a lower gland (6), a first roller set (8) and a second roller set (9);

the upper part of the packing box main body (2) is fixedly connected with the upper gland (1), a containing space of a rubber packing (7) is formed between the packing box main body (2) and the upper gland (1) in a combined mode, and the rubber packing (7) is contained in the containing space; the lower part of the packing box main body (2) is fixedly connected with the lower joint (3), and the first roller group (8) is installed in an inner space formed by combining the packing box main body (2) and the lower joint (3); lower joint (3) lower part, through annular clamp (5) with the structure cooperation of lower gland (6), with ball joint (4) link together be provided with in the inner space that the combination formed between lower joint (3) and ball joint (4) second roller train (9), second roller train (9) are installed on ball joint (4), wherein: lower clutch (3) and annular clamp (5) with ball joint (4) have the connection sphere of mutually supporting, gland (6) ring cover is in down on ball joint (4), fixed connection is in on lower clutch (3), inlay annular clamp (5) ball joint (4) with down between gland (6), it is spacing restriction is carried out in ball joint (4).

2. The packing box of claim 1, wherein the tension adjusting double-roller set deviation rectifying device comprises: the first roller group (8) and the second roller group (9) respectively comprise an annular chassis (17), a plurality of fixed limiting frames (16) and rollers (13) with the same number, the fixed limiting frames (16) and the rollers (13) are uniformly arranged on the annular chassis (17) at intervals along the circumference, wherein the fixed limiting frames (16) are fixedly arranged on the annular chassis (17), the rollers (13) are respectively arranged between two adjacent fixed limiting frames (16) by utilizing bolt shafts (14), the rollers (13) can rotate relative to the bolt shafts (14), and are restrained and positioned by the fixed limiting frames (16) in the axial direction; the rollers (13) are uniformly distributed and combined along the circumference, and circular arc-shaped concave ring grooves arranged on the annular circumferential surface of the roller body are respectively formed into a circular section combined hole (15) at the axle center positions of the first roller group (8) and the second roller group (9).

3. The packing box of claim 2, wherein the tension adjusting double-roller set deviation rectifying device comprises: the first roller group (8) and the second roller group (9) are arranged along the circumference in a relative staggered certain angle by taking the central axis as the center of a circle, so that the rollers (13) in the first roller group (8) and the rollers (13) in the second roller group (9) are arranged on the longitudinal projection plane mutually.

4. The packing box of any one of claims 1 to 3, wherein the tension adjusting double-roller set deviation rectifying packing box comprises: go up gland (1) with be provided with first sealing washer (10) on the connection face between packing box main part (2) with be provided with second sealing washer (11) on the connection face between lower clutch (3) with be provided with third sealing washer (12) on the connection sphere between bulb joint (4).