RU190612U1 - LINEAR DRILLING DRIVE OF A DEEP ROD PUMP WITH SUPPORT - Google Patents

Abstract

The utility model relates to the field of petroleum engineering, namely, pumping systems for oil production using installations sucker rod pumps (UShGN), more specifically to a linear rack and pinion shaft pump with a support that is designed to install the drive to the well. The technical result of the claimed utility model is to increase the reliability and efficiency of the installation with a stable positioning of the linear drive of the sucker rod pump at the wellhead. A linear rack and pinion drive of a submersible sucker-rod pump with a support in which the support is a tent containing an upper platform to which at least three legs are attached, interconnected by jumpers, each leg being provided with an adjustable screw support that is installed with the possibility of positioning the drive on the wellhead is in a predetermined position, and the upper platform is a platform and is configured to install a drive on it.

Description

TECHNICAL FIELD TO WHICH A USEFUL MODEL RELATES.

The utility model relates to the field of petroleum engineering, namely, pumping systems for oil production using installations sucker rod pumps (UShGN), more specifically to a linear rack and pinion shaft pump with a support that is designed to install the drive to the well.

BACKGROUND

The closest technical solution in its essence and the achieved effect to the claimed utility model is patented by Unico. Inc (USA) invention called “Linear sucker pump device and method of its operation”, protected by US patent number US 8152492 B2, MCP F04B 17/00, publ. 04/10/2012, prior 12.06.2006, which was adopted as a prototype.

This document describes the device of a linear sucker-rod pumping system, which provides a reciprocating vertical movement of a sucker rod column of a deep sucker-rod pump (SHGN), which contains: a linear mechanical drive consisting of: a housing mounted on a flange of a string head; a vertically arranged movable element connected with a rod column USHGN, with the help of which a controlled reciprocating vertical movement of the rod column of a submersible pump is provided; reversible motor having a reversibly rotating element, functionally connected with a vertically movable element. The interaction in a linear mechanical drive is carried out in such a way as to ensure a fixed relationship between the angular position of the rotating element of the electric motor and the movement of the vertically movable element reversibly with the possibility of reversal. The motor alternately rotates first in the forward direction with the first part of the pump stroke (stage of the plunger stroke up), and then in the opposite direction, when the second part of the pump stroke flows (stage of the plunger stroke down).

The linear mechanical drive device includes: a rack-and-pinion gear transmission consisting of a rack with a rack and a pinion gear formed on it adapted to work in the vertical direction to provide a reciprocating movement of the rack along the axis of the pump stroke. The toothed rack interacts with the toothed crown of the pinion gear, and the gear is connected to the rotating shaft of the engine. Thus, the rotation of the electric motor in the forward direction ensures the movement of the rack vertically upwards along the axis of the pump stroke, and the movement of the rack vertically downwards is accompanied by the rotation of the motor in the opposite direction opposite to the forward direction of the pump. The rack rack is functionally connected with the wellhead rod of the rod column to transfer force. The rack has in its upper end of the node for the operational attachment of the rod of the rod column. In the rack there is a longitudinally directed hole, passing along the axis of the pump stroke from the lower end of the rack to the upper part of the rack. The rod has the ability to move inside the rack in the hole.

The linear mechanical actuator device additionally includes a fastening clip (clamp), which provides rigid mounting of the rod of the rod string to the stand. The fastening clip (retainer) provides support and transfers the force to the upper end of the rod string from the rack and pinion drive.

A rack drive rack with a U-shaped cross-section forms a longitudinal opening in the rack, in the form of an open channel located around the axis of the pump stroke, and there are teeth on the outer surface of the central part of the rack opposite from the legs to engage the corresponding teeth the crown of the pinion gear. The linear sucker pump also has one or more roller bearing guides. They are placed longitudinally against the legs of the rack and opposite the gear, to ensure the engagement of the teeth of the rack of the pinion mechanism with the toothed crown of the pinion gear. The device is a linear pump rod, has a pair of guide supports placed from the sides of the legs of the rack, opposite each other, to forcibly hold the rack in a position that allows the rack teeth to engage with the pinion gear.

Additionally, the above-mentioned document discloses the design features of the location of the pinion gear in a linear mechanical drive. Thus, the device may additionally contain a mechanical gearbox (box) placed between the electric motor and the pinion gear and this mechanical gearbox is a bevel-type reduction gear, due to which the axis of rotation of the pinion gear has a perpendicular direction relative to the axis of the pump stroke. The control system (SU) of a linear rack and pinion drive of a pumping unit ensures that the electric motor operates in the “motor” mode while the rack moves up (direct rotation of the electric motor) with the ascending part of the pump stroke, and ensures that the motor operates in deceleration mode (the electric motor operates in the “generator” mode) , when the rack moves down with the downward part of the pump stroke. In addition, the control system includes an energy storage element for storing energy generated in the braking mode of the electric motor operation (when the electric motor is operating in the generating mode), in which the unit for utilizing the stored energy is located, ensuring the transfer of the accumulated energy to the electric motor in the motor loaded) mode. The control system may also include a dissipating element to ensure the dissipation of energy produced by the electric motor in the braking mode of its operation, while the control device is selectively configured to operate one or the other of the energy storage elements and the energy dissipation element. The device may further comprise an oil pan (bath, crankcase) located below the lower end of the rack, and configured to hold a volume of lubricant therein, and to immerse the lower end portion of the rack into it, resulting in lubrication of the rack during its working movement. The bottom of the rack is immersed in the lubricant in the sump for at least part of each pump stroke. The pan (bath, crankcase) is formed by two pipes, hermetically connected below, forming a liquid annular cavity between them, to fill the cavity with a volume of lubricant that is pumped into the upper part of this annular cavity. The inner tubular wall of the pallet is located around the wellhead stem and freely fits inside the rail opening to ensure travel, and the outer wall of the tubular sump is located around the rail. The device may further comprise an elastic element located inside the cavity in the sump, below the lower end of the rack. It ensures the appearance of an upward force in the system applied to the lower end of the rack, in case the lower end of the rack has gone beyond the limits of the allowed normal lower position of the rack during the working stroke. The elastic element can also be made to form an upward force applied to the lower end of the rack during a part of each working stroke of the submersible sucker rod pump. According to the description of the utility model, the elastic element can be made in the form of a pneumatic cylinder, in which the air is compressed during the course of the rack downwards, and expands during the course of the rack upwards. The latter allows you to use the energy released at the stage of the STG stroke down for use when working on the STG stroke stage up.

The disadvantage of the technical solution described above is that it is installed directly on the mouth, which can be tilted at a considerable angle because of which the drive cannot be installed on it.

DISCLOSURE OF USEFUL MODEL

The task, which the claimed utility model is aimed at, is to eliminate the drawbacks of the known technical solutions, as well as to create such a linear actuator of a sucker-rod pump with a support that will allow the actuator to be installed on the well, regardless of the fittings installed on it.

The technical result of the claimed utility model is to increase the reliability and efficiency of the installation with a stable positioning of the linear drive of the sucker rod pump at the wellhead.

The technical result is realized due to such a linear rack and pinion drive design of a submersible sucker-rod pump with a support, in accordance with the claimed utility model, in which the support is a tent containing an upper platform, to which at least three legs are attached, interconnected by means of jumpers, each leg is equipped with an adjustable screw support that is installed with the possibility of positioning the drive at the wellhead in a predetermined position, and the upper platform is an area the puff is made with the possibility of installing a drive on it

According to an embodiment of the utility model, the upper platform can be made multi-layered, which makes it possible to apply greater force on the support, which in turn gives an increase in drive efficiency and a large margin of productivity.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a general view of the inventive linear rack drive of a submersible sucker rod pump with a support, in plan.

FIG. 2 is a front view of a linear rack and pinion drive of a submersible sucker rod pump with a support.

FIG. 3 shows a general view of the support.

FIG. 4 shows a general view of the installation site.

IMPLEMENTATION OF THE USEFUL MODEL

The linear sucker-rod pump is designed for pumping liquids, such as water and / or hydrocarbons, from a subterranean formation or reservoir, and contains a linear-driven sucker-rod pump with a rack and pinion mechanism adapted to attach the sucker-rod depth pump units (UShGN). The toothed rack has a mount for connecting to a polished rod. The rake is engaged with the gear and is driven by an asynchronous motor, setting a reciprocating motion to the rack and pumping mechanism. The drive can be equipped with a recovery system that returns part of the power when the rail moves down under its own weight.

The T-REX linear drive is a mechanical device that has a substantially vertically movable element attached to a polished rod of a rod pump to impart and control vertical movement of the rod string from the rod pump. Asynchronous motor through the control system changes the position of the phases, thereby through the shaft of the gearbox transmits the reciprocating motion to the linear mechanism, thus establishing a fixed relationship between the rotating shaft of the induction motor and the linear position of the vertically moving element.

The T-REKS linear drive device includes a linear mechanical drive device consisting of: a gear rack, a gearbox, an induction motor, and a control station, functionally connected to an induction motor for control.

An asynchronous electric motor is connected to the gearbox, which allows to achieve optimal torque. The output shaft of the gearbox with a key connected to the gear linear actuator.

The control system analyzes the information and controls the asynchronous motor, focusing on the rail position sensor, allowing you to adjust the speed of raising and lowering the gear rack independently, also allows you to provide shutter speed at the upper and lower points of movement of the gear rack for optimal filling of the pump.

The control system includes sensors for reading one or several parameters of a group of parameters consisting of: the linear position of the toothed rack along the pump axis, the angular position of the linear T-REX drive relative to the deviation from the vertical, engine torque, engine rotational speed, engine acceleration, and power consumption engine

The control system may additionally include a system for recovering energy generated during engine shutdown. The sensing mechanisms in conjunction with the control unit are designed to determine the linear position of the toothed rack twice during each pump cycle, once up and once down. The control system is also implemented, in some embodiments, for detecting a fault condition and applying corrective actions in engine operation.

The linear rack and pinion drive of the submersible sucker-rod pump 1 (see Figs. 1 and 2) consists of the following components: an electrically driven unit, an electric motor 4 with a gearbox 6 on its shaft, formed in a single motor housing, a rack and pinion gear consisting of a rack 5, adapted for operation in the vertical direction to provide reciprocating motion along the axis of the pump stroke, and pinion gear 7 with an axis perpendicular to the stroke of the pump stroke, functionally connected to the output one element of the electric drive unit; mount the mouth of the rod rod; guides, located in the housing at the top and bottom of the gear, for fixing and guiding the rail in a position that allows the teeth of the rail to engage the crown of the pinion gear and the support 2 on which the drive 1 is mounted. Support 2 (see Fig. 3) is a tent containing the upper platform 9, to which at least three legs 10 are attached. The upper platform 9 is a platform and is configured to mount the drive 1. The optimal number of legs 10 is three. It is this number of legs 10, with any effects on them, ensures the stability of the overall structure, and the whole structure does not undergo deformation of the main elements.

The legs 10 are interconnected by means of jumpers 11, which are stiffening ribs, and additionally increase the reliability of fixing the legs and the stability of the tent at the wellhead. Each leg 10 is equipped with an adjustable screw support 12, due to which the tent 2 is installed in a predetermined position, that is, it is positioned along with the actuator 1 at the wellhead.

The upper platform 9 is a multi-layer, consisting of two layers of metal sheet, between which is a channel. In the center of the platform 9, a hole is made for installation of the drive 1 therein. The described construction of the platform 9 is reliable and provides loads up to 20 tons, with a given effect of 14 tons.

This design of the tent 2 allows you to distribute the payload from the sucker rod pump to the surface near the mouth, thereby removing the main load from the flange of the wellhead column, as done in the prototype. Also tent 2 allows positioning, namely, leveling the drive relative to the surface at the mouth and set it at a given angle to adjust the position of the output shaft from the mouth.

This design tent also allows you to mount the drive on a large number of wells.

This design is simple to manufacture, since the guides are formed by a single cylindrical surface, this form is easiest to implement in practice, with at least four in the specified prototype of guiding surfaces.

There is also a bearing unit, which eliminates the torque that occurs when the pump runs from the rods in the well, which eliminates the need for additional guides to fix the rail in a radial direction relative to its axis. On its basis, a linear rail-type drive USGGN with a carrying capacity of 12 tons with a working stroke length of 2.8 m was designed.

The inventive device may additionally contain the following elements: a pallet (crankcase) with lubricant, which provides lubrication of the rack and pinion mechanism by immersing the lower part of the rail in it, the elastic element 8, designed to support the rail in the lower position during stops, repairs, and to prevent it from going the limits of the working range in case of equipment failure, it can also be configured to form an upward force applied to the lower end of the staff during the upstroke. In the rail there may be an open channel through its length, the axis of which is parallel to the axis of the working stroke of the submersible pump, the channel is placed opposite the teeth of the rack and is intended to accommodate a polished rod in it. Variants of the shape of the cross section of the through open channel can be the following: round shape, rectangular shape, having a connection with the outer circular surface of the rack; combination of two merging figures of a circle and a rectangle. The device may contain an electrically driven or a mechanical rotator designed for the forced rotation of the rods, which is mounted on a bearing support.

Additionally, the device 1 can be equipped with a mounting platform 3 (see Fig. 4), designed to service the drive 1.

The design of the drive 1 is unified, so that due to the change in the length of the toothed rack 5 and the change in the power of the induction motor 4, the payload from the depth pump is changed in accordance with Table 1.

Table 1

Claims (2)

1. Linear rack and pinion drive of a submersible sucker-rod pump with a support, characterized in that the support is a tent containing an upper platform, to which at least three legs are attached, interconnected by means of jumpers, each leg being provided with an adjustable screw support installed with the possibility of positioning the drive at the wellhead in a predetermined position, and the upper platform is a platform and is configured to mount the drive on it. 2. A drive with a support according to claim 1, characterized in that the upper platform is made multi-layer.

Images