RU173405U1 - OIL-FILLED CHAINBOARD FOR THE POLISHED STOCK OF THE ROCKING MACHINE - Google Patents

Abstract

The utility model relates to the oil industry and can be used to increase the life of the polished rod of sucker rod pump units. The technical problem, which is to increase the service life of the polished rod of the rocking machine, stuffing box seals, as well as to eliminate the creak of the polished rod, fixing the polished rod during the current and major overhaul of wells, is achieved by the fact that the oil-filled packing follower for the polished rod of the rocking machine consists of a body the oil chamber with oil seals, oil chamber covers, stem seals in the oil chamber cover, while inside the wider part of the oil chamber housing concentrically, with tsevym gap installed glass, formed as a sleeve with cylindrical outer peripheral surface and the inner side of the conical surface at the bottom of the side wall which is provided with radial openings. 2 ill.

Description

The technical field to which the utility model relates.

The utility model relates to the oil industry and can be used to increase the life of the polished rod of sucker rod pump units.

State of the art

Known wellhead stuffing box sucker rod pump installation (RF patent No. 2260672, publ. September 20, 2005, class IPC ЕВВ 33/03), containing a chamber with stuffing box packing and cover for sealing wellhead polished rod associated with the suspension of the rod string, pipe with ball a support located in the socket of the tee of the valve, while on the lower side a freely suspended cylinder is connected to the ball bearing of the nozzle, in which the muffled plunger is located with the possibility of reciprocating motion, while the plunger is connected to the lower side with odveskoy rod string, and a top - with polished rod the wellhead, the inner tube and the above-plunger cavity of the cylinder area are filled with grease and fluidically communicated with the annulus of wellhead through a check valve. The disadvantage of this installation is that the replacement of the seals is possible only when killing or etching the well, and also that when the pressure in the annulus increases, the pressure on the lubricant assembly will increase, which will lead to a quick extrusion of the lubricant into the LHG cavity.

Known working chamber of the wellhead stuffing box (RF patent No. 158204, publication date 20.12.2015, class IPC ЕВВ 33/03), comprising a housing, a pressure nut, a packing follower, a pack of chevron cuffs, a support pressure sleeve, a radial flange compensator, a threaded sleeve for connection to the emergency chamber of the existing wellhead stuffing box, while the packing follower and the support pressure sleeve are filled on the inner surface with a layer of solid polyurethane that acts as guide bushings for the polished rod, the support pressure sleeve has a rectangular protrusion with a the ability to effectively press the chevron cuffs to the surface of the polished rod and the annular cavity in the upper part for filling with non-freezing fluid, in the lower part of the support push sleeve, the elastic element made of polyurethane, which acts as a guide sleeve for the polished rod, is made with the possibility of energy storage during axial compression for pressing chevron cuffs with the ability to automatically compensate for the wear of the sealing edges of the chevron cuffs, which are installed with the possibility of contact with the annular bands liquid filling grease.

The disadvantage of this design of the wellhead stuffing box chamber is that, due to the absence of oil-driven stuffing boxes, the oil-containing fluid will be poured into the atmosphere, replacing the stuffing boxes, the support pressure sleeve is possible only when killing or pickling the well.

Known wellhead seal (patent of the Russian Federation No. 2473778, publication date 01/27/2013, class IPC ЕВВ 33/03), including a tee with a wellhead, a stuffing box with a spherical support, a metal housing, a polished rod, while the tee is equipped with a spherical support, the gland head is made in the form of an upper bearing support with a bore overlapped at the bottom by a bottom and filled with an stuffing box, pressed by a packing follower with an annular support, in which an annular chamber is made hydraulically connected by a channel with a discharge pipe, and an annular the measure is blocked in the upper part by a glass with a sealing element pressed against the polished rod by a compression nut and filled with grease, and the metal case is made detachable, equipped with an adapter with a spherical bore covering the upper and lower spherical supports, with sealing of the spherical supports inside, compressible groovebacks installed with the possibility of contact with the end surface of the adapter.

The disadvantage is that since the stuffing box device is rigidly connected with the fittings, the stuffing box replacement is impossible without killing and corrupting the well, as well as the fact that there is no emergency stuffing box and the grease is not replaced with new.

Known stuffing box (US patent No. 5865245, publication date 02.02.1999, IPC ЕВВ 33/03), including a container, in the lid and bottom there are central cylindrical openings for the rod. The lid of the tank is equipped with an elastomeric stem seal. Through holes made around the perimeter of the tank for refueling, draining, and safety (from transfusion) are equipped with plugs. Inside the tank there is a sleeve with a stepped inner side surface, on the protrusion of which there is an absorbent pad with a pair of wicks for supplying oil from the tank to the side surface of the rod pump rod.

The disadvantage of this design is the large dimensions of the installation and high metal consumption, the complexity of the design (many connecting elements), respectively, the high cost of the design during manufacture and operation.

The closest analogue to the technical result achieved is a device for lubrication of the stuffing box stem (options) (RF patent No. 2205938, publication date 10.11.2002, class IPC ЕВВ 33/03), including:

container with elastomeric packing

the bottom of the tank has a protrusion made in the form of a ring with radial holes located above the bottom of the tank

the top of the tank is equipped with a metal lid having a diametrical section and an axial cylindrical hole with an annular groove,

while the seal is continuous and placed with the possibility of self-installation on the gland rod in the groove under the cover.

The disadvantage of this device is that the oil-seals are not split, but solid, which does not allow them to be replaced without disconnecting the polished rod from the suspension, as well as the large dimensions of the device.

Utility Model Essence

The technical task of the claimed utility model is to provide the possibility of fixing the polished rod during the repair of wells.

The problem is solved in that the oil-filled packing follower for the polished rod of the pumping unit consists of an oil chamber body with oil-seals installed inside it, an oil chamber cover connected to the compression sleeve, concentric with an annular gap inside the wider part of the oil chamber housing, a glass is installed, made in the form of a sleeve with an external lateral cylindrical surface and a lateral internal conical surface, in the lower part of the side wall of which there are squo knowing radial holes, while the glass is made with the possibility of installing three split crackers in it along its inner conical surface.

Brief Description of the Drawings

In FIG. 1 shows an oil filled core box in a working embodiment. In FIG. Figure 2 shows an oil-filled packing follower for the option for overhaul of wells (SHGN does not work).

Utility Model Implementation

An oil-filled packing follower includes an oil chamber housing 1 (Fig. 1), made in the form of a sleeve with a tapering cylindrical stepped outer and inner surface. The lower end of the tapering part of the housing 1 is made closed, with a Central hole in the tapering part for the passage of the rod of the pumping unit. Inside the wider part of the chamber 1 concentrically, with an annular gap 2, a glass 3 is installed, made in the form of a sleeve with an outer lateral cylindrical surface and a lateral inner conical surface. At least 4 through radial holes 4 are made in the lower part of the side wall of the glass 3.

In the working version, oil-gland seals 5 are installed in the upper part of the cup 3, through the central through holes of which a polished rod 6 passes. made stepped. In the upper, narrower part of the cover 7, a central through threaded hole is made, into which a compression sleeve 8 is installed, with a central through passage for passing the polished rod 6. In the central part of the compression sleeve 8, from the outer end, a through hole is made into which it is pressed centralizer 9 polished rod 6, made in the form of a non-metallic cylindrical sleeve.

A thread 10 is made on the lower side surface of the tapering part of the housing of the oil chamber 1, with which it is connected to the housing of the stuffing box 11.

When stopping the operation of the rod pump, to fix the polished rod 6, use crackers 12 (Fig. 2).

An oil-filled packing follower for a polished rod of a rocking machine works as follows.

The housing of the oil chamber 1 is connected by a threaded connection 10 with the stuffing box 11. Inside the housing of the oil chamber 1, a cup 3 with a uniform annular gap 2 is installed concentrically. Then, oil is filled into the housing of the oil chamber 1 in a volume of about 200 ml, which fills the gap through the through radial holes 4 2. In the upper part of the glass 3 install oil-driven oil seals 5, the outer diameter of which is not less than the inner diameter of the glass 3.

A cover 7 is installed on the outer side surface of the wider part of the oil chamber housing 1 on the threaded connection. On the threaded part of the cover 7, a compression sleeve 8 is installed on the threaded connection for pressed oil-oil seals 5 to the inner surface of the cup 3 to prevent oil leakage from the housing 1.

When the rocking machine is operating, the polished rod 6 passes through the central hole of the centralizer 9, the pinch sleeve 8, oil-seals 5, the space in the housing 1 filled with oil, the central hole of the closed end of the housing of the oil chamber 1, and then through the stuffing box. The centralizer 9 provides additional vertical stability of the polished rod 6 as a result of its reciprocating motion.

When reciprocating, the polished rod 6, passing through the oil-filled chamber 1, is arbitrarily lubricated with oil, which reduces the wear of the rod surface due to friction. When moving upward, excess oil from the rod is discharged by oil-driven oil seals 5. When the polished rod 6 is moved downward, oil from the polished rod 6 is discharged by stuffing box packing 11.

To maintain the oil level in the housing of the oil chamber 1, the rocking machine is stopped, the assembly is turned off, including the cover 7 with a compression sleeve 8 and a cylindrical sleeve 9, after which the oil is added to the required level. After filling, the node is installed in the reverse order and the rocking machine is launched.

The proposed design of an oil-filled packing follower for a polished rod of a rocking machine is used at LUKOIL-PERM LLC with a positive result. Topping up oil for an oil chamber body with a volume of about 200 ml is produced no more than 1 time in 3 days in a volume of 50-100 ml, while the stopping time is 3-5 minutes.

An oil-filled packing follower for a polished rod of a rocking machine during routine or major overhaul (TKRS) works as follows (Fig. 2).

In order to prepare for the current or major overhaul of the well, the rocking machine is stopped by cranks in the upper position (50 minutes by hours), then the cover 7 is unscrewed together with the compression sleeve 8 and the cylindrical sleeve 9, oil-oil seals 5 are removed, and instead, along the inclined walls of the glass 3, install three split crackers 12 so that their inner ribbed surfaces form a through channel through which the polished rod 6 passes.

After installing the split crackers 12, the cover 7 together with the compression sleeve 8 and the cylindrical sleeve 9 are installed in place, after which the crackers 12 are pressed by the compression sleeve 8, fixing the motionlessly polished rod 6. Next, the rocking machine is put by cranks in the upper position (60 hours min), the rope suspension is unloaded, the polished rod 6, fixed by the crackers 12, is disconnected. Next, work is carried out on the current or capital repair of the well.

An oil filled filling box for a polished rod of a rocking machine is used at the Shagirtsko-Gozhanskoye field of LLC LUKOIL-PERM.

Claims (1)

An oil filled filling box for a polished rod of a rocking machine, consisting of an oil chamber housing with oil seals, an oil chamber cover, a compression sleeve, characterized in that a cup made in the form of a sleeve with a ring is installed inside the wider part of the oil chamber housing concentrically, with an annular gap an outer lateral cylindrical surface and a lateral inner conical surface, in the lower part of the side wall of which through radial holes are made, while the glass is made with the possibility of Strongly installation therein three biscuits split along its inner conical surface.

Images