CN211777312U

CN211777312U - Novel coal bed gas well head eccentric wear prevention sealer

Info

Publication number: CN211777312U
Application number: CN201922294963.8U
Authority: CN
Inventors: 邵小平; 金鑫; 陈兴亮; 宋关伟; 蒋仁义; 詹俊
Original assignee: China Petroleum and Chemical Corp; Sinopec East China Co
Current assignee: China Petroleum and Chemical Corp; Sinopec East China Co
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-10-27
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a novel coal bed gas well mouth eccentric wear prevention sealer, including the polished rod. The novel polished rod pressing device is characterized in that U-shaped groove guide wheels are symmetrically distributed on two sides of the polished rod, a pressing cover body is installed at the position of the center line above the U-shaped groove guide wheels in a coincident mode, a fixing support is welded to the outer side of the pressing cover body, the U-shaped groove guide wheels are fixed to the fixing support through guide wheel shaft pins, the distance between the fixing supports is the same as the thickness of the U-shaped groove guide wheels, guide wheel bearings are arranged in the U-shaped groove guide wheels, and the pressing cover body is close to the bottom end of one side of the polished rod and is welded. This novel coal bed gas well head eccentric wear prevention sealer simple structure, convenient operation contain and prevent that eccentric wear part and supplementary adjustment part carry out the doublestage and prevent partially, prevent partially effectually, prevent that eccentric wear part utilizes the U type leading wheel of fixing on the support to guide the up-and-down motion of beam-pumping unit polished rod, can prevent effectively that the polished rod from jumping out U type guide way.

Description

Novel coal bed gas well head eccentric wear prevention sealer

Technical Field

The utility model relates to a coal seam gas well mouth sealing device technical field, concretely relates to novel coal seam gas well mouth eccentric wear prevention sealer.

Background

The well opening production of the gas well of the coal bed gas, basically adopt the beam-pumping unit, drive the sucker rod through the polished rod, the oil-well pump moves up and down and drains off water and produces the gas, the apparatus to realize the sealing of this kind of row and produce the way is but the well head of blowout prevention box of the deflection adjustment, adopt the rubber to realize the well head is sealed, carry on the well head of deflection adjustment through two pairs of adjusting nuts, guarantee the polished rod is placed in the middle, achieve the goal of preventing the eccentric wear, but the Glan diameter of this kind of sealing means is small, and it is small to pack and install the pipe diameter additionally, the blowout prevention box of slight eccentric wear promptly wearing and tearing, and the rubber is apt to wear, the liquid measure is apt to reveal greatly, polished rod eccentric wear well head blowout prevention box and tee bend after the rubber is worn, cause polished rod eccentric wear and thin, the well.

Disclosure of Invention

The utility model aims at solving the problem, providing a novel coal bed gas well mouth eccentric wear prevention sealer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a novel coal bed gas well mouth eccentric wear prevention sealer, includes gland body, leading wheel bearing, U-shaped groove leading wheel, compresses tightly glan, packs, tuningout centralizer, polished rod, leading wheel pivot, fixed bolster, short circuit, adjusting nut, coupling, tee bend, tuningout base.

U-shaped groove guide wheels are symmetrically distributed on two sides of the polish rod, a gland body is coincidently installed at the central line above the U-shaped groove guide wheels, the outer side of the gland body is welded and connected with a fixing bracket, the U-shaped groove guide wheel is fixed on the fixing bracket through a guide wheel shaft pin, the distance between the two fixing brackets is the same as the thickness of the U-shaped groove guide wheel, a guide wheel bearing is arranged in the U-shaped groove guide wheel, the bottom end of one side of the gland body close to the polish rod is welded and connected with a compaction gland, a short joint is arranged outside the middle part of the polish rod, filler is filled in the short joint, an offset adjusting base is arranged below the short joint, an offset-adjusting centralizer is arranged between the offset-adjusting base and the polish rod and is fixed by the adjusting nut, the bottom end of the short joint is in threaded connection with a coupling, and the bottom end of the coupling is in threaded connection with a tee joint.

Further, the deviation-adjusting centralizer is a powerful woolen nylon centralizer.

Furthermore, the short circuit is one of two types or three types of oil pipes with threads at two ends.

Further, the filler is a mixture of waste belts and rubber which are soaked by engine oil.

The utility model has the advantages that: simple structure, convenient operation, the maintenance of being convenient for contains and prevents partial wear part and supplementary adjustment part and carry out the doublestage and prevent partially, prevents partially effectually, adds the short circuit back packing space big, the sealing material greatly increased that can fill, and the utilization compresses tightly the glan and compresses tightly sealing material, and the leakproofness improves. The sealing material is waste and old belt with small amount of rubber, and the short joint is two or three kinds of oil pipe with two sides processed with screw thread, so as to realize waste utilization and reduce production cost. The eccentric wear prevention part utilizes the U-shaped guide wheels fixed on the support to guide the polish rod of the oil pumping unit to move up and down, when the polish rod shakes or inclines left and right, the two symmetrical U-shaped guide wheels are matched, so that the polish rod can be effectively guided and prevented from jumping out of the U-shaped guide grooves, the polish rod is ensured to be always kept in the pressing cover, the U-shaped groove guide wheels on the two sides and the well head central line to move up and down, and the centering effect is good. The auxiliary deviation-adjusting centralizer is a strong nylon centralizer and has long service life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the gland comprises a gland body, 2, a guide wheel bearing, 3, a U-shaped groove guide wheel, 4, a compression gland, 5, a filler, 6, a deviation-adjusting centralizer, 7, a polish rod, 8, a guide wheel shaft pin, 9, a fixed support, 10, a short joint, 11, an adjusting nut, 12, a coupling, 13, a tee joint, 14 and a deviation-adjusting base.

Detailed Description

The following examples are presented to enable those skilled in the art to more fully understand the present invention, but are not intended to limit the invention in any way.

As shown in fig. 1, the novel coal bed gas wellhead eccentric wear prevention sealer comprises a gland body 1, a guide wheel bearing 2, a U-shaped groove guide wheel 3, a pressing gland 4, a packing 5, an eccentric wear adjustment centralizer 6, a polish rod 7, a guide wheel shaft pin 8, a fixing support 9, a short joint 10, an adjusting nut 11, a coupling 12, a tee joint 13 and an eccentric wear adjustment base 14.

U-shaped groove guide wheels 3 are symmetrically distributed on two sides of the polish rod 7, a gland body 1 is installed at the position of the center line above the U-shaped groove guide wheels 3 in a superposition mode, fixing supports 9 are welded and connected to the outer side of the gland body 1, the U-shaped groove guide wheels 3 are fixed on the fixing supports 9 through guide wheel shaft pins 8, the distance between the two fixing supports 9 is the same as the thickness of the U-shaped groove guide wheels 3, guide wheel bearings 2 are arranged in the U-shaped groove guide wheels 3, a pressing gland 4 is welded and connected to the bottom end, close to the polish rod 7, of one side of the gland body 1, a short circuit 10 is arranged outside the middle of the polish rod 7, a filler 5 is filled in the short circuit 10, a deviation adjusting base 14 is arranged below the short circuit 10, a deviation adjusting centralizer 6 is arranged between the deviation adjusting base 14 and the polish rod 7, and the deviation adjusting centralizer 6 is adjusted, when the packing and the U-shaped wheel are installed, the polished rod coincides with the center line of the gland, the bottom end of the short joint 10 is connected with a coupling 12 in a threaded mode, and the bottom end of the coupling 12 is connected with a tee joint 13 in a threaded mode.

In this preferred embodiment, the deviation-adjusting centralizer 6 is a strong woolen nylon centralizer.

In the preferred embodiment, the short joint 10 is one of two or three types of oil pipes with threads at two ends.

In the preferred embodiment, the filler 5 is a mixture of waste belts and rubber which are soaked by engine oil.

The utility model discloses the principle as follows: according to fig. 1, the device is mainly composed of three parts, including an eccentric wear prevention part, a packing sealing part and an auxiliary adjustment part. The eccentric wear prevention portion includes: the gland comprises a gland body 1, a U-shaped groove guide wheel 3, a guide wheel bearing 2, a guide wheel shaft pin 8 and a fixing support 9; the packing seal portion includes: compacting the gland 4, the filler 5 and the short circuit 10; the lower portion is an auxiliary adjustment portion including: the device comprises an offset centralizer 6, an adjusting nut 11, an offset base 7 and a coupling 12. Two symmetrical U-shaped groove guide wheels 3 are arranged in the eccentric wear prevention part, the U-shaped groove guide wheels 3 are symmetrically distributed on two sides of a polished rod 7, the gland body 1 and the two symmetrical U-shaped groove guide wheels 3 are installed in a center line superposition mode, two fixing supports 9 are fixed on the outer side of the gland body 1 through welding and are evenly distributed on two sides of the gland body 1, the U-shaped groove guide wheels 3 are fixed on the fixing supports 9 through guide wheel shaft pins 8, the distance between the two fixing supports 9 is the thickness of the U-shaped groove guide wheels 3, gasket pads are arranged on two sides of a guide wheel bearing 2, the guide wheel bearing 2 is matched with the guide wheel shaft pins 8 to enable the U-shaped groove guide wheels 3 to rotate freely, pins are arranged on two sides of the shaft pins for fixing and positioning, the guide wheel shaft pins 8 cannot move, and the fixing supports 9 guarantee that the center lines of the two symmetrical U-shaped, The central line coincidence of polished rod 7, the radius of the U type cambered surface of U type leading wheel 3 is unanimous with the radius of polished rod 7, thereby guarantee that the cambered surface of U type leading wheel 3 has fine laminating with polished rod 7, guarantee that U type leading wheel 3 fixed on support 9 can effectively guide beam-pumping unit polished rod 7 along well head central line up-and-down motion, when the polished rod rocks or the horizontal tilt, two U type leading wheels 3 of symmetry cooperate, can effectively guide and prevent the polished rod from jumping out U type guide way, guarantee that the polished rod remains the up-and-down motion on gland 1 and well head central line all the time, reach polished rod 7 between two parties, prevent polished rod 7 with the back of packing 5 wearing and tearing, polished rod 7 skew center, wear well head tee bend 13 and oil pipe in. The gland body 1 and the compression gland 4 are welded and processed into a whole, the central line of the gland body 1 coincides with the central line of the compression gland 4, the short circuit 10 and the deviation adjusting base 7 are welded and processed into a whole, the central line of the deviation adjusting base 7 coincides with the central line of the short circuit 10, a packing cavity is formed inside the short circuit 10, sealing materials 5 are filled in the packing cavity, the compression gland 4 is arranged below the gland body 1, the compression gland 4 compresses the packing through rotating the gland 1, and a cavity between the polish rod 7 and the short circuit 10 is sealed, so that no liquid and gas leakage at a well mouth is ensured. The short circuit 10 below is equipped with supplementary tuningout base 7, be equipped with three screw hole that is located 6 half high departments of supplementary tuningout centralizer and radial evenly distributed on supplementary tuningout base 7 and be used for the installation right adjusting nut 11, guarantee polished rod 7 central line and short circuit 10 and gland 1's central line coincidence all the time through adjusting nut 11, make polished rod 7 in-process from top to bottom placed in the middle all the time, realize not wearing the mesh of well head partially to conveniently install filler 5 additional, U type leading wheel 3 easy to assemble. The upper end of the connecting coupling 12 is in threaded connection with the lower portion of the short joint 10, and the lower end of the connecting coupling 12 is in threaded connection with the wellhead tee 13. The short circuit 10 is connected with the deviation adjusting base 7 through welding, the short circuit 10 is long, a filling cavity formed inside the short circuit is large, sealing is achieved by filling a large amount of waste belts soaked by engine oil and a small amount of rubber, the filling amount is large due to the large filling cavity, better and more lasting sealing can be achieved, and the toughness and the wear resistance of the waste belts soaked by the engine oil are improved to some extent. Compress tightly gland 4 and gland 1 processing welding as an organic whole, wherein compress tightly gland 4 and can compress tightly the belt and the rubber of packing intracavity portion, realize better sealed, when belt and rubber received certain wearing and tearing, through screwing gland 1 and compress tightly the realization sealed with compressing tightly gland 4 again, can reduce the number of times of changing belt and rubber. The auxiliary deviation-adjusting base 7 is used for supporting the auxiliary deviation-adjusting centralizer 6, wherein the auxiliary deviation-adjusting base 7 and the short circuit 10 are welded and processed into a whole, the auxiliary deviation-adjusting centralizer 6 is matched with the three centralizing adjusting nuts 11 to use to assist deviation adjustment of a polished rod, so that the deviation-preventing effect is enhanced, and meanwhile, the U-shaped guide wheel, the belt and the rubber are favorably arranged. The upper end of the connecting coupling 12 is in threaded connection with the lower part of the short joint 10, and the lower end of the connecting coupling 12 is in threaded connection with the wellhead tee 13, so that normal drainage and production of the coal bed gas well are realized. All the threaded joints are wound by raw material belts to enhance the sealing performance of the joints. The deviation-adjusting centralizer is a strong nylon centralizer, when a wellhead leaks, the connection between the short joint 10 and the gland 1 is firstly screwed, if the wellhead leaks, the belt and the rubber in the packing cavity are replaced.

Those skilled in the art will appreciate that the above embodiments are merely exemplary embodiments and that various changes, substitutions and alterations can be made without departing from the spirit and scope of the invention.

Claims

1. A novel coal bed gas well mouth eccentric wear prevention sealer is characterized by comprising a gland body (1), a guide wheel bearing (2), a U-shaped groove guide wheel (3), a compaction gland (4), a filler (5), an offset centralizer (6), a polish rod (7), a guide wheel shaft pin (8), a fixed support (9), a short joint (10), an adjusting nut (11), a coupling (12), a tee joint (13) and an offset base (14);

u-shaped groove guide wheels (3) are symmetrically distributed on two sides of the polished rod (7), a gland body (1) is installed at the position of the center line of the upper portion of each U-shaped groove guide wheel (3) in a coincident mode, a fixing support (9) is welded on the outer side of each gland body (1), the U-shaped groove guide wheels (3) are fixed on the fixing support (9) through guide wheel shaft pins (8), the distance between the two fixing supports (9) is equal to the thickness of the U-shaped groove guide wheels (3), guide wheel bearings (2) are arranged in the U-shaped groove guide wheels (3), one side bottom end, close to the polished rod (7), of each gland body (1) is welded and connected with a compression gland (4), a short joint (10) is arranged outside the middle of the polished rod (7), a filler (5) is filled in the short joint (10), and a deviation adjusting base (14) is arranged below the short, an offset-adjusting centralizer (6) is arranged between the offset-adjusting base (14) and the polished rod (7), the offset-adjusting centralizer (6) is fixed through the adjusting nut (11), the bottom end of the short joint (10) is in threaded connection with a coupling (12), and the bottom end of the coupling (12) is in threaded connection with a tee joint (13).

2. The novel coalbed methane well mouth anti-eccentric seal device as claimed in claim 1, characterized in that the eccentric centralizer (6) is a strong woolen nylon centralizer.

3. The novel coal-bed gas well mouth eccentric wear prevention sealer as claimed in claim 1, characterized in that the filler (5) is a mixture of waste belts and rubber soaked by engine oil.