RU2706499C1 - Pile structure of pumping units foundation - Google Patents

Abstract

FIELD: construction.SUBSTANCE: invention relates to construction, namely to pile foundations, and can be used in oil and gas industry for installation of pump units on weak and subsidence soil or in winter conditions, and also can be used in swampy terrain and permafrost soil. Pile structure of pumping units foundation includes piles made in the form of metal tubular bodies with thrusts and tips on lower end in form of cone-shaped auger, grillage frames, piles fixed on top, with holes for attachment of pump unit frame and angles with which piles are fixed relative to each other. Edge of screw of tip is sharpened at angle of 20°–90°, and each pile is equipped in lower part with drain hole.EFFECT: providing simplification of screw penetration into soil, reduction of groundwater ejecting forces.1 cl, 3 dwg

Description

The invention relates to pile foundations and can be used in the oil and gas industry for installing pumping units on weak and subsiding soil or in winter conditions, and can also be used in marshy terrain and on permafrost soil.

Foundations for pumping units must meet the following basic requirements: strength and stability, inadmissibility of sediments, deformations that violate normal operating conditions, creating strong vibrations.

Monolithic concrete and reinforced concrete foundations greatly increase the cost of construction due to the depth of freezing of the soil and the need to perform a large amount of earthwork.

From the prior art, a metal pile foundation for a rocking machine of a well pumping unit is known (RU 150462, IPC E02D 27/44, published on 02.20.2015 in Bull. No. 5), including piles made in the form of vertically arranged pipes, at least two of which are rigidly connected to each other by a connecting beam, and the foundation consists of four pairs of pipes vertically spaced apart, not connected to each other, but each pair is rigidly connected to each other by a connecting beam to install the base of the rocking machine, and the waiting beam is made in the form of a channel for mounting it on top of the piles, and plates welded to the channel from two ends in its upper part with holes for connecting them to piles with bolts, and the ends of each pile are made in the form of a screw, at least with one revolution, and with a pointed end, while to the upper parts of four pairs of unconnected, vertically arranged pipes and to the upper parts of the second, third and fourth pairs of pipes, rigidly interconnected by connecting beams, two intersecting corner welds are welded fillet, which are welded to each other with plates for fastening these vertical pipes, and plates with holes for centering bolts and adjusting the base of the rocking machine are welded to the first and fourth beams, and the beams are equipped with additional clamping beams with longitudinal grooves, studs and nuts for tightening the beams, the base of the rocking machine and pressure beams.

The disadvantages of this foundation are the difficulty of screw penetration into the soil due to the lack of sharpening along the outer edge and the large buoyant forces acting on the hollow rods (due to the "Archimedes force"), in the presence of groundwater.

The technical task of the invention is the creation of a construction of a pile foundation of pumping units, which allows to simplify the insertion of augers into the soil due to the presence of sharpening and to reduce the buoyancy forces of groundwater acting on the piles, by equipping them with drainage holes in the lower part.

The technical problem is solved. Pile construction of the foundation of pumping units, including piles made in the form of metal tubular bodies with stops and tips at the lower end in the form of a cone-shaped screw, grillages mounted on top of piles, with holes for mounting the frame of the pumping unit and corners, which piles are fixed relative to each other.

What is new is that the tip screw edge is sharpened at an angle of 20 ° -90 °, and each pile is equipped with a drainage hole at the bottom.

The proposed pile foundation for the pump unit is illustrated by the drawings shown in FIG. 1-3.

In FIG. 1 shows a construction of a pile foundation for a pumping unit, side view;

In FIG. 2 is a front view;

In FIG. 3 is a section AA, FIG. one.

The pile foundation for the pumping unit consists of piles (2) having an anticorrosive coating and made of metal pipes, with pointed tips (4) in the form of cone-shaped screws. The tip of the tubular support element of the metal support structure may be either a welded or cast tip. The ratio of the diameter of the pile to the diameter of the screw is 0.6-0.9, and the pitch of the screw to its diameter is 0.4-0.8.

Piles are interconnected by corners (7, 9) and grillages (1). For high-quality welding of corners, plates (6) are welded to piles. Side corners (9) are interconnected by plates (8).

For the convenience of controlling the screwing depth, the piles have stops (3).

The pile foundation has grillages (1) with holes for installing and fixing the frame of the pump unit. The fixing of grillages to piles is reinforced with corner plates (5).

The edges of the tip screws (4) are sharpened at an angle of 20 ° -90 ° to improve the penetration of piles (2) into the ground.

To reduce the buoyancy forces of groundwater piles in the lower part have drainage holes (10, Fig. 3).

Assuming the construction of the pile foundation of pumping units, it is possible to simplify the insertion of augers into the soil due to the presence of sharpening and to reduce the buoyancy forces of groundwater acting on the piles by equipping them with drainage holes in the lower part.

Claims (1)

The pile construction of the foundation of pumping units, including piles made in the form of metal tubular bodies with stops and tips at the lower end in the form of a cone-shaped screw, grillages fixed on top of piles, with holes for mounting the frame of the pumping unit and the corners with which the piles are fixed relative to each other, characterized in that the edge of the screw of the tip is sharpened at an angle of 20 ° -90 °, and each pile is equipped in the lower part with a drainage hole.

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