SU5196A1 - Continuous sucker rod pump for deep wells - Google Patents

Description

The single-acting sucker-rod pumps that are used in the fields operate by supplying fluid periodically, only during the plunger lift, and when the plunger is lowered, the movement of the fluid stops, which causes jolts and additional pressure in the rods.

In order for them to lift the liquid non-stop both when raising the plunger and when it is launched, it is proposed in the sucker-piston plunger pumps, instead of solid rods to do tubular rods, with a cross-section along the line, take half the area of the pump cylinder.

In FIG. 1 shows a vertical section of the bottom of the pump; FIG. same, top of the pump.

The pump body is made of a long pipe 16, with its sleeves 13 and 20 screwed on the ends. Inside the case, pumping sleeves 15, 15 are inserted and clamped, carefully machined and smoothly ground by caliber, with the latter upper sleeve 15 also having internal polished surface along the entire length of a series of small annular grooves, like grooves on the pistons of heat engines, but on a small scale, to form a maze, in order to reduce oil leakage through the gap between the plunger and the cylinder liners. Inlet or suction double ball valve 14-14 or for small wells not containing sand is inserted at the lower end of the cylinder. Inside the pump cylinder, composed of sleeves 15, the plunger of the pump 19 moves, at the lower end of which a double ball pressure valve 18-18 and the lower end plunger 17. are installed. The plunger is made so long that in the lower position, when immersed in the pump, the upper its end protrudes slightly from the upper coupling of the pump housing. To the protruding end of the plunger, tubular rods of pump 26 are attached. To better direct the plunger, an additional pump 21 branch pipe of slightly larger diameter than the plunger and the length equal to the length of the pump casing is screwed on top; this nozzle ends with a sleeve 23 into which a copper sleeve 24 is inserted on the key, clamped in it

a nut. The sleeve 24 is worn on the first, for this purpose, a rather short tubular rod polished from the outside, and serves to guide the latter during its swinging movement during operation. A spring lamp 22 is centered on the additional pump nozzle 21, centering the position of the pump in the well. An air-gas cap 27 made of a large-diameter pipe, concentrically worn on the tubular bar 26 and secured on the latter, tightly worn at both ends, is attached to the upper end of this polished rod. bushing 28. At the lower end of it in the tubular rod drilled holes 25, connecting ush; s interior of the hollow tubular rods of the pump with the inter tubular space of the gas Foot cap 27, top germetricheski occluded and serving as ordinary air caps pumps for smooth movement of the unstressed supplied, pump fluid. At the top, exit sh, iy from the well, the end of tubular sucker rods is worn with a crosspiece 39 and a transfer sleeve 38 a bell-shaped piece of a large diameter pipe 34, moving it up and down in the gland 36, placed on another short pipe 33 of a slightly larger diameter, serving the receiver housing and the gas emitted from oil 32 at the upper end, and the tee 32 below to drain the tarted oil itself. This receiver, with its bottom 31 in the form of a large nipple, is placed on the lid of the wellhead, made in the form of a flange 30, which is fixed to the well pipes by a packing gland, bolted, as shown in the drawing. Inside the receiver, so that the oil does not fall back into the well, another pipe 35 is installed, which envelops the moving end of the tubular rods 26, which is put in the upper end of the sealing gland 37. A small piece of polished rod 40 is screwed into the upper end of the transfer coupling 38, the column of tubular rods of the pump, together with the movable part of the receiver, is suspended by means of agester 41 to the balance bar and receives a vertical swinging movement transmitted to the pump plunger when the latter is in operation.

Since the plunger has an outer diameter slightly larger than the tubular bars, it will not pass into the sleeve 23 and the pump, therefore, during its descent into the well when installed, will hang on the tubular bars.

To be able to work, it is necessary to install the pump casing firmly in the well at the required depth so that the pump casing does not move during the swinging motion of the plunger. This is achieved by placing under the pump casing at the upper end of the outer receiving tube 1 of the holder - the core 9, consisting of the holder 9 (automatic slip), and its lock 3, with a certain rotation of which, it is possible to force the plates of the holder at any depth to seize for the well pipe; then the pump stops firmly in place. The weight of the body itself, the core and all the bottom pipes is quite sufficient to keep it from lifting while the plunger is operating. If necessary, it is always possible to raise the pump for inspection, since the dies of the core during lifting will slide down the wedge part and will not interfere with the further rise of the pump. Due to the fact that the plunger works only with its lower end, and the oil from the cylinder of the pump sucked in by the sandstone he immediately gets into the interior of the plunger and the tubular rods going up from it, the plunger will not get over the plunger and cannot move if it moves in the cylinder.

During the flow of the plunger, oil from the well flows through the grid.