RU147653U1 - DEEP BAR PUMP - Google Patents

Abstract

A plunger deep-well pump comprising a cylinder and a plunger arranged with axial longitudinal displacement, characterized in that cuff devices are installed on both ends of the cylinder and / or couplings are installed on both ends of the plunger; the cuff device is made in the form of a hollow part with axial symmetry consisting of a transfer clutch, on the inside of which a slot is made for alternately placing an end restrictive ring, a sleeve on the inside of which the cuff is placed, and a second restrictive ring, while the first cut communicates with the second a slot with a larger diameter, made with the possibility of alternately placing a nut and a sub in it, and the cuff is made with a gap facing the sub; the coupling is made in the form of a hollow part with axial symmetry and can be installed at the ends of the plunger, while on the surface of the coupling there is a groove in which a split type cuff is placed, a latch in the form of a ring of springy stainless steel is installed on top of the cuff, and on both sides of the groove are located belt holes.

Description

The utility model relates to the oil industry and is intended for oil production in difficult operating conditions - viscous oil and emulsions, the presence of mechanical impurities in the oil, salt and asphalt-resin-paraffin deposits.

Deep sucker-rod pumps are designed for oil production with difficult working conditions - viscous oil and emulsions, mechanical impurities, salt and asphalt-resin-paraffin deposits (paraffin deposits). The pump operates in a wide range of viscosity characteristics (with kinematic viscosity of the oil emulsion - up to 500 cSt) and with a significant content of mechanical impurities.

BACKGROUND PUMP PLUNGER [patent of the Russian Federation No. 2295061, in which the plunger contains a supporting rod, on which are installed with a gap and the possibility of axial movement of the sleeve with conical counter ends forming ring grooves in which the disconnectors, o-rings are known, is known from the prior art. Conical counter ends form grooves expanding in the direction of the bearing rod, and the disconnector and sealing rings are made in one piece in the form of elastic rings of trapezoidal cross section in contact with the wider part of the bearing rod.

The disadvantage of the analogue is the presence of o-rings, which are subject to wear and during long-term operation are not able to withstand the flow of solid suspended particles into the rubbing elements of the pump, which in turn reduces the specified operational characteristics of the pump and reliability of use.

Also known is a Borehole PUMP PUMP [RF patent No. 2213261], comprising a cylinder, a movably hollow plunger placed in it in the form of a rod with radial channels. On the outer lateral surface of the plunger, annular grooves are made, having a cross-sectional trapezoid in cross section, the smaller base of which faces the gap in the cylinder-plunger pair. The larger base is hydraulically communicated through channels with a plunger cavity. In the annular grooves, sealing elements are installed in the form of continuous rings of elastoplastic deformable material with a section in the form of an isosceles trapezoid. Rings are placed in annular grooves with the possibility of interaction along their conical surfaces. The outer surface of the rod is protected by a corrosion-resistant coating with dielectric properties. At both ends of the plunger mud collectors are installed in the form of cup-shaped cuffs installed in the cylinder with an interference fit. The cuff is unloaded with a radial channel. The cylinder can be hardened by plastic deformation of the metal. Additional channels in the plunger cage are oriented to the cup of the upper cuff. The number of seals on the plunger increases with increasing depth of the pump.

The disadvantage of the aforementioned analogue is that it does not provide for the removal of contaminants when filling the dirt collectors during pump operation, after which the contaminants inevitably enter the pump and contribute to increased wear of the rubbing elements.

The closest in technical essence is a STEEP DEPTH PUMP (RF patent No. 2368803) which includes a cylinder and a plunger with grooves placed therein with the possibility of longitudinal movement, while on the inner surface of the cylinder and plunger there are annular grooves in which the lower part has a horizontal wall, and the upper part has a beveled up wall.

The disadvantage of the prototype is that during the reciprocating movement of the plunger, together with the lifting of the liquid, a significant part of the mechanical impurities and various deposits are removed into the gap between the cylinder and the plunger, which complicates the operation of deep pumps and leads to premature wear of the main pump parts: cylinder , plunger, valve pairs.

The purpose of the utility model is to prevent the removal of solids of oil in the gap between the cylinder and the plunger.

The technical result consists in providing the possibility of equipping the cylinder and plunger of the pump with removable dirt collection devices.

The technical result is due to the fact that the prototype, containing the cylinder and placed in it with the possibility of longitudinal axial movement of the plunger, is characterized in that cuff devices are installed on both ends of the cylinder and / or couplings are installed on both ends of the plunger.

The cuff device is made in the form of a hollow part with axial symmetry, consisting of a transfer clutch, on the inside of which a slot is made for alternately placing the end restrictive ring, the sleeve, on the inner side of which the cuff is placed, and the second restrictive ring. The first slot communicates with the second slot of a larger diameter, made with the possibility of alternately placing the nut and the sub in it, and the cuff is made with a gap facing the sub.

The coupling is made in the form of a hollow part with axial symmetry and with the possibility of installation at the ends of the plunger. A groove is made on the surface of the coupling, in which a split-type cuff is placed, and a clamp in the form of a ring of springy stainless steel is installed on top of the cuff, and hole belts are located on both sides of the groove.

The novelty of the utility model is that, depending on the ratio of the lengths of the cylinder and the plunger, the operated deep-well sucker-rod pumps can be equipped with dirt collection devices. For example, pumps with a short cylinder and a long plunger can be equipped with cuff devices, and pumps with a short cylinder can be additionally equipped with couplings.

For pumps with a short cylinder and a long plunger, cuff devices are installed in the upper and lower parts of the cylinder, in which the cuff is located, which serves to prevent mechanical impurities and paraffin-resinous deposits from entering the working cavity of the cylinder.

The novelty of the design of the pump with a short cylinder is that in this pump the designs of two types of pumps are combined: a standard type sucker rod pump and a sucker rod pump for viscous oily liquids.

Brief Description of the Drawings

In FIG. 1 is a drawing of a cuff device for mounting on top of a cylinder.

In FIG. 2 is a drawing of a cuff device for mounting from below the cylinder.

In FIG. 3 shows drawings of a coupling for mounting on top of a plunger.

In FIG. 4 shows drawings of a coupling for mounting from below the plunger.

In FIG. 5 is a drawing showing an embodiment of the placement of cuff devices on a 25-225 TNM1K pump cylinder with a short cylinder and a long plunger.

In FIG. 6 is a drawing showing an embodiment of coupling arrangement on a plunger of a 25-225 THMUK pump with a short cylinder.

Utility Model Implementation

Each of the cuff devices shown in (Fig. 1, Fig. 2), the upper 1 (Fig. 1) and lower 2 (Fig. 2) consists of a transfer clutch 3 in the slot, which alternately places the end restrictive ring 4, sleeve 5, s the inner side, which is placed on the cuff 6 and the second restrictive ring 7. The second slot of the large diameter adjacent to the first slot in the transfer clutch, in which the nut 8 and the sub 9 is placed.

Each of those shown in FIG. 3, FIG. 4 couplings of the upper 10 and lower 11 consists of a hollow part with axial symmetry 12, in which a groove 13 is made, in which a split cuff 14 is placed. A clamp 15 in the form of a stainless steel ring is located on top of the cuff. On both sides of the groove 13 are respectively ring rings of the holes 16.

The placement of the upper 1 and lower 2 cuff devices (Fig. 5) on the cylinder 17 is shown on the example of a pump 25-225 TNM1K. At the same time, a plunger 18 is located in the pump cylinder 17. A pressure valve housing 19 is installed on top of the cuff device 1, and an extension pipe 20 is installed on the bottom of the cuff device 2, in which the housing of the suction valve 21 is located. The valve body 21 includes a valve seat 22, on top of which pair: ball seat 23 and ball 24.

The housing of the suction valve 21 through the coupling 25 communicates with the housing of the relief valve 26, in which the ring 27 and the relief element 28 are located. The relief valve is designed to drain the formation fluid during the lifting of the tubing string (tubing) (not shown in the drawings).

The housing 26 is adjacent to the seat of the discharge valve 29, on top of which a valve pair is installed: the seat of the ball 30 and the ball 31.

The intake filter 32 is installed at the bottom of the valve seat 29.

The option of placing the upper 10 and lower 11 couplings (Fig. 6) on the plunger 33, which is located in the cylinder 34. The top and bottom of the cylinder 34 are respectively connected to the couplings 35 and 36, which respectively are connected to the extension nipples 37 and 38. The extension nipple 37 is communicated with clutch 39. In clutch 39 is a clutch 40, in which there is a rod 41, which is adjacent to the body of the discharge valve 42, located in the cylinder 34. The valve body 42 includes a valve pair: seat 43 and ball 44.

Bottom of the plunger 33 inside the extension nipple 38 is a suction valve body 45, including a valve pair: ball seat 46 and ball 47.

At the bottom of the extension nipple 38, there is a sleeve 48, which includes a pin valve body 49 including a pin element 50, a ring 51. At the bottom of the pin 48, a pressure valve seat 52 is located, on top of which is a valve pair including a seat 53 and ball 54.

At the bottom of the valve seat 52 is a intake filter 55.

Cuff devices 1 and 2 perform the function of protecting the working surface of the cylinder from mechanical impurities.

Suction and discharge valves are designed to bypass the formation fluid from the suction cavity into the discharge cavity.

Receiving filters 32, 55 are intended for partial protection of the pump from absorbed mechanical impurities - it is installed without fail on all types of deep pumps.

The principle of operation of the pumps shown in FIG. 5 and FIG. 6 is the same as standard deep well sucker rod pumps. Therefore, to demonstrate the operation of the pump, we give an example of the operation of the pump 25-225 TNM1K (Fig. 5).

The basic technological scheme of the operation of deep sucker rod pumps consists in changing the volume of the cavity of the cylinder 17 under the plunger 18 in one cycle twice from minimum to maximum.

Accordingly, the pressure in the closed space of the cylinder 17 changes. Depending on the pressure, the suction 21 or pressure valve 29 will open alternately, bypassing the reservoir fluid into the cylinder 17, and pumping it into the tubing.

This is achieved by moving the plunger 18, which performs a reciprocating movement - from top to bottom and back inside the cylinder 17. In the first half of the cycle, the plunger 18 begins to move down to bottom dead center in the cylinder 17 under the weight of the tubing. This reduces the space under the plunger 18, respectively, the pressure will increase to a maximum. The discharge valve 29 is opened, and the weight of the liquid column under its pressure is perceived by the suction valve 21.

In the second half of the cycle, when the plunger 18 rises up, pumping (raising) of the formation fluid occurs. At the same time, the suction valve 21 opens, filling the cavity of the cylinder 18 with formation fluid from the annulus.

One of the important elements in the design of pumps with a short cylinder (Fig. 5), contributing to the pumping of viscous oil, is the device upper 1 and lower 2, which performs the function of protecting against ingress of mechanical impurities into the working cavity of the cylinder.

During the reciprocating movement of the plunger 18 through a stationary cylinder 17, at the ends of which the upper 1 and lower 2 cuff devices with cuffs 6 are mounted, the plunger 18 is cleaned of mechanical impurities, which makes it possible to significantly reduce the likelihood of them entering the cylinder cavity.

The principle of operation of the couplings 10 and 11 (Fig. 6) is that during the reciprocating movement of the plunger 33 caused by the drive elements of the rocking machine (not shown), the inner surface of the cylinder 34 is cleaned.

Also, during the operation of old tubing, corrosion deposits are often observed. To avoid getting them into the cylinder cavity, the upper sleeve 10 is installed. The sliding (tightened) movement of the cuffs 14 along the inner surface of the cylinder 34 cleans the working area of the cylinder and provides protection against ingress of impurities from the outside.

A positive technical effect of using the utility model is to increase the efficiency of protecting the cylinder and plunger of the pump from ingress of mechanical impurities from oil. Achievable technical result allows the use of pumps for wells with a high content of mechanical impurities in excess of 1.3 g / l, which is the maximum permissible working norm for the content of mechanical impurities in the pumped liquid for conventional deep-well sucker rod pumps.

A positive effect is achieved due to the use of cuff devices and / or couplings in typical deep-well sucker rod pumps, while the problem of removal and penetration of mechanical impurities into the cylinder is solved.

A cuff device, installed on both sides of the cylinder, helps protect the inner surface of the cylinder from mechanical impurities, paraffin and salt deposits, clean the plunger, as well as additional seal and center the plunger at the inlet / outlet of the cylinder.

The installation of couplings on the plunger of the pumps makes it possible to maximize protection of the inner surface of the cylinder from mechanical impurities, which significantly increases the working life of the pump (running hours) compared to analog versions without appropriate protection.

Additional technical effects include the possibility of producing highly viscous oil due to the original cylinder-plunger design (Fig. 6), which provides the maximum self-priming (injection) effect of high-viscosity oil-water emulsion. This circumstance promotes the use of these types of pumps even at depths exceeding 1,500 m, while modern analogues operate on highly viscous oil at depths up to 1,200 m.

Claims (1)

A plunger deep-well pump comprising a cylinder and a plunger arranged with axial longitudinal displacement, characterized in that cuff devices are installed on both ends of the cylinder and / or couplings are installed on both ends of the plunger; the cuff device is made in the form of a hollow part with axial symmetry consisting of a transfer clutch, on the inside of which a slot is made for alternately placing an end restrictive ring, a sleeve on the inside of which the cuff is placed, and a second restrictive ring, while the first cut communicates with the second a slot with a larger diameter, made with the possibility of alternately placing a nut and a sub in it, and the cuff is made with a gap facing the sub; the coupling is made in the form of a hollow part with axial symmetry and can be installed at the ends of the plunger, while on the surface of the coupling there is a groove in which a split type cuff is placed, a latch in the form of a ring of springy stainless steel is installed on top of the cuff, and on both sides of the groove are located belt holes.

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