RU53737U1 - DEPTH BAR PIPE PUMP WITH REMOVABLE SUCTION VALVE - Google Patents

Abstract

The invention relates to the oil and gas industry. The purpose of the invention is to improve the reliability of the deep-well pump with a removable suction valve. This goal is achieved in that a sucker rod pump with a removable suction valve, comprising a cylinder with an anchor shoe mounted on its lower part under the anchor mandrel with a sealing ring and a suction valve assembly including an anchor nipple, an open suction valve body with longitudinal passageways equally spaced around the grooves, a ball with a saddle, a fishing trunnion located in the cylinder with the possibility of reciprocating movement of a hollow plunger, the upper end of which It is equipped with an open valve body, and the lower end is a pressure valve, consisting of a closed pressure valve body with a ball and a seat, a fishing sleeve attached to a closed pressure valve body, is made so that in the open body of the suction valve there is a central hole for the pusher ending in the upper part of the fishing trunnion and mounted with the possibility of reciprocating movement within the working stroke of the valve and interaction with the latter, moreover, on the fishing tr Pfe at the level of the longitudinal passage equal to the circumference of the grooves of the open casing of the suction valve are provided located in the last protrusions. Using the invention will improve the efficiency of the suction valve and the pump as a whole, the profitability of oil production by reducing underground well repairs associated with their resuscitation.

Description

The invention relates to the oil and gas industry and can be used in downhole sucker rod pump units.

A device is known for ensuring the operation of the suction valve of a deep-well pump (RU 2258837 C2, Bull. No. 23 08/20/2005), designed to produce viscous oil with a high paraffin content, the manifestation of emulsion from deviated wells. In the body of the suction valve there is a valve pusher with the possibility of reciprocating movement within the valve stroke and interacting with the lower end of the plunger on the one hand and on the other hand with a suction valve ball,

However, the suction valve of this pump is rigidly connected to the pump cylinder and is not recoverable.

According to structural and functional features, the closest analogue, prototype, is a deep-well sucker-rod pump with mechanical fastening of a removable suction valve (Catalog “Deep-well sucker-tubes pumps of OJSC“ Izhneftemash ”, rev.2-2001 p. 43), containing a cylinder with a bottom mounted parts with an anchor shoe under the anchor mandrel with a sealing ring and a suction valve assembly including an anchor nipple, an open suction valve body with longitudinal passages equally spaced around the circumference of zami, a ball with a saddle, a fishing pin located in the cylinder with the possibility of reciprocating

of movement a hollow plunger, the upper end of which is equipped with an open valve body, and the lower end is a discharge valve, consisting of a closed discharge valve body with a ball and a seat, a fishing sleeve attached to a closed discharge valve body.

The efficiency of valves, including the suction valve, is significantly reduced and the pump stops working when producing highly viscous with a high content of paraffin oil from deviated wells with the manifestation of an emulsion. The suction valve freezes in the open position, is clogged with paraffin, which leads to premature failure of all the downhole pumping equipment.

The technical problem is posed, which is to increase the reliability of operation of a suction extractable valve of a submersible sucker rod pump.

The problem is achieved in that a deep-well sucker-rod tube pump with a removable suction valve, comprising a cylinder with an anchor shoe mounted on its lower part under an anchor mandrel with a sealing ring and a suction valve assembly including an anchor nipple, an open suction valve body with longitudinal passages equally spaced around the grooves, a ball with a saddle, a fishing trunnion located in the cylinder with the possibility of reciprocating movement of a hollow plunger, the upper end of the cat The second one is equipped with an open valve body, and the lower end is a pressure valve, consisting of a closed pressure valve body with a ball and a seat, a fishing sleeve attached to the closed pressure valve body, is made so that in the open body of the suction valve there is a central hole for the pusher ending at the top of the fishing trunnion and mounted with the possibility of reciprocating movement within the working stroke of the valve and interaction with the latter,

moreover, on the fishing trunnion at the level of the longitudinal passage equal to the circumference of the grooves of the open casing of the suction valve are provided located in the last protrusions.

Figure 1 shows a longitudinal section of a deep rod pump with an extractable suction valve in its closed position (hereinafter - the pump); figure 2 is a section along the line aa in figure 1; figure 3 is a section along the line BB in figure 1; figure 4 is a longitudinal section of the pump in the open position of the suction valve.

At the lower end of the cylinder (not shown), through an extension nipple 1 (Fig. 4) and a sleeve 2, an anchor shoe 3 is installed, which is in the castle connection with the anchor mandrel 4, on which the sealing ring 5 is fixed using the nipple anchor 6. The open housing 7 is removable the suction valve is provided with longitudinal grooves equally spaced around the circumference of the grooves 8 (Fig. 3) for passing the produced fluid and is connected to a nipple anchor 6 fixing the seat 9 of the ball 10 (Fig. 4) of the removable suction valve.

In the open casing 7 of the suction valve, a central hole is made for the pusher 11, ending in the upper part with a fishing pin 12 and mounted with the possibility of reciprocating movement within the valve stroke and interaction with the latter. On the fishing trunnion 12 at the level of the longitudinal passage grooves 8 of the open housing 7 of the suction valve equally spaced around the circumference, protrusions 13 are placed in these grooves (Figs. 2, 4), which prevents the fishing trunnion 12 from turning.

A hollow plunger (not shown) is located in the cylinder with the possibility of reciprocating movement, the upper end of which is equipped with an open valve body, and the lower end is a discharge valve, consisting of a closed discharge valve body with a ball and seat, a fishing sleeve attached to the closed case

pressure valve (catalog No. Deep-well sucker-rod pumps of OAO Izhneftemash, rev.2-2001 p. 43).

The pump operates as follows.

A cylinder connected to the tubing string equipped with an anchor shoe 3 (FIG. 4), a retrievable suction valve assembly with a fishing trunnion 12 under the fishing sleeve mounted on the lower end of the hollow plunger (not shown), is lowered into the well, then the column sucker rods with a plunger. The plunger is adjusted. In the initial position (figure 1), the suction valve 10 and the discharge valve (not shown) are closed. When the plunger moves up, the discharge valve is closed, and the suction valve 10 opens together with the pusher 11 and the fishing pin 12 (Fig. 4) due to the formation of vacuum in the sub-plunger cavity. The produced oil enters the sub-plunger cavity. When the plunger moves down, the suction valve 10 closes (Fig. 1) under the weight of the ball together with the pusher 11 and the fishing pin 12, which creates a positive effect when producing viscous oil. At the same time, under the influence of the fluid flow from the subplunger cavity, the discharge valve opens and the fluid flows into the supraplunger cavity 14. The process is then repeated.

For underground well repair, it is first necessary to remove the suction valve assembly from the anchor shoe 3. To do this, the fishing sleeve installed at the end of the plunger is lowered onto the fishing pin 12, trapping is carried out by turning the string of pump rods in the direction of rotation of the threaded rods with its subsequent lifting upwards, into As a result, the anchor mandrel 4 together with the suction valve assembly breaks off the anchor shoe 3 and a hole is formed for draining the liquid from the tubing string, etc. lifting it out of the hole. The use of the invention will improve the efficiency of the suction

valve and pump as a whole, the profitability of oil production by reducing underground well repairs associated with their resuscitation.

Claims (1)

Deep sucker-rod tube pump with a removable suction valve, comprising a cylinder with an anchor shoe mounted on its lower part under an anchor mandrel with a sealing ring and a suction valve assembly, including an anchor nipple, an open suction valve housing with longitudinal grooves running equally circumferentially circumferentially, a ball with a saddle, a fishing trunnion located in the cylinder with the possibility of reciprocating movement of a hollow plunger, the upper end of which is equipped with an open valve body, and the lower end is a discharge valve, consisting of a closed discharge valve body with a ball and a seat, a fishing sleeve attached to a closed discharge valve body, characterized in that in the open housing of the suction valve there is a central hole for the pusher ending in the upper part of the fishing pin and installed with the possibility of reciprocating movement within the valve stroke and interacting with the latter, moreover, on the fishing trunnion at the level of longitudinal passage the grooves of the open housing of the suction valve equally spaced around the circumference are provided with protrusions located in the latter.