TUDOR VIOREL (RO)
MOIANU VASILE (RO)
ALEXANDRU IONEL (RO)
BORIC DAN-GABRIEL (RO)
TUDOR VIOREL (RO)
MOIANU VASILE (RO)
ALEXANDRU IONEL (RO)
BORIC DAN GABRIEL (RO)
| RO116665B1 | 2001-04-30 |
| Downhole piston pump for hydrocarbons exploitation Claims 1. The downhole piston pump for the hydrocarbon exploitation is characterized by the use of a ball joint with a spherical joint, consisting of a drive head (2) which is mounted on a polished rod (4) by drive the piston of the pump and secure with two nuts (3), polished rod (4) passes through a graphite bronze conducting nut (8) and nine graphite bronze seal nut (9) into the channels to which special petroleum- resistant grease is inserted, in accordance with (10) and (11 ), and the nuts (8) and (9) which seal on the polished rod (4), rest on the shaft (12) which is leaning on another adjustable guide nut (13) which is adjusted and fixed with three pins ( 14), adjusting the sealing and guide nut (8) and (9) by means of a threaded nut (5) which is screwed into a shell (15), and secured is made with two nuts (6) which are stamped (stop) in the ring (7), and in the housing of the seal box (15) screw a spherical bolt (16) and secure with a nut (17), on the spherical bolt (16) mounting the assembly formed by the spherical ring (20) which is mounted on the spherical guide (21), the mounting being made on the spherical bolt (16) with the support of six screws (18) and six elastic shaft (19). 2. The downhole piston pump for the exploitation of hydrocarbons is characterized by the use of a multiple discharge valve which consists of: the valve support (33) on which the valve seat (32) is initially mounted, six balls (31 ), a spring block (30) initially having six adjusting shaft (27), six springs (28) six spring guides (29), a closing flange (26) in which six adjusting pins are mounted (25), and six shock absorbers (24). All of these are centered with two positioning pins (34) and secured with two nuts (23), after which the ball guide is mounted and secured with a nut (22). 3. The downhole piston pump for exploiting their hydrocarbons is characterized by the use of a new type of piston with seals to reduce friction and losses between the piston and the cylinder, inside the cylinder (45) by installing the top cage plunger (46). on which a wiper (48) and two elastic rings (47) are fitted, a reduction (49) of the piston adapter, where a piston rod is fitted with seals (50) on which a threaded bush (51 ) is mounted which protects the seals (53) from the pressure inside the cylinder, 36 seals (53) of the piston rod are adjusted by means of 36 rings (52) which are pushed by a shaft (54) and secured by a nut (55), on the piston rod with seals mounting a reduction (56) which is secured with a nut (55), and on a reduction (56) a cage (57) is fitted with a ball (58), the seat of a valve (59) , a fixing screw (60) of the seat that is secured with a nut (61 ). |
Description:
The invention is related to a linear downhole piston pump for the exploitation of hydrocarbons and is used in the extraction of hydrocarbons from the productive layers of oil wells by sucker roads
A linear pump is known according to the invention RO no. 116665B which does not remove the most common deficiencies of the pumps such as, piston or cylinder wear, valve seat wear or valve sealing wear.
In the present case, the invention solves the technical issues by coming up with a number of modifications designed to increase the operating time of the pump relative to the pump related to the patent RO no. 116665B:
- the sealing box of the pump is modified in the sense that a spherical joint is added to protect the sealing nuts from the polished rod.
- the six-ball multiple discharge valve is changed in order to guide the balls and springs that press on the seat, with the possibility of adjusting the valve opening.
- the sealing and fixing system of the pump is modified in the fixing nipple, in the tubing, by the efficiency of the system of adjustment and ensuring the adjustment of the seals
- the piston with seals of the pump is modified with one that has protection when locking the seals in the cylinder due to the direct pressure of the pressure on them, providing for the possibility of optimal regulation and assurance of the friction of the seals inside the cylinder, this realizing during operation a minimum friction, also provided with an adapter that allows the change if necessary with a metal piston.
The downhole piston pump according to the invention eliminates fluid losses around the polished rod or couple cylinder - piston by using a spherical joint seal box, composed of a drive head which is mounted on the polished rod of piston drive, which passes through a guide nut, made of graphite bronze, and through other nine sealing nuts through the channels to which special oil-resistant grease is introduced, all nuts leans on a socket, supported by another nut, adjustable guide and thread in a shell in which the spherical bolt secured by a nut is screwed, and the multiple discharge valve is formed by a support on which the valve seat is mounted, six balls, a spring block, six adjusting nuts, six springs, six spring guides, one closing flange fitted with adjusting pins and dampers and one spherical guide: the new type of piston reduces friction and reduces cylinder-piston losses by mounting a wiper with two elastic rings and a reduction of adjustment of the piston to which the piston rod is fitted with seals and a threaded nuts that protects the seals from the inside pump pressures, then 36 seals of the piston rod, adjusted with 36 rings fixed by a nuts and secured with a nut, on the upper part of the piston rod with seals is mounted the cage with the valve seat and the ball, the whole assembly being fixed with a screw that secures with a nut.
Ail these changes are made in order to create some advantages, as:
- increase the operating time between two consecutive interventions in case of replacement or repair of the pump.
- gives the possibility of easier balancing of the beam pumping unit.
- energy advantage: saves 60% of the electricity used in other conventional piston pumps.
- increases the flow of extracted hydrocarbons by 10%, due to the lack of buckling of the rods at the downstream stroke, in fact increasing the piston stroke.
The following is an example of a linear downhole piston pump for hydrocarbons expoitation in relation to figures 1 ,2, 3, 4, 5, 6, which represents:
- figure 1 , general view of the upper part of the pump, longitudinal section;
- section A - A - view through multiple valve
- section X - X - view through the spherical bolt of the sealing chamber
- figure 2, general view of the lower part of the pump, longitudinal section;
- figure 3, genera! view of the box with spherical connection, according to claim no 1
- figure 4, detailed view of the multiple valve, according to claim no. 2
- sect - A - A - view through multiple valve
- sect - P1 - P1 - view in the direction of flow through the multiple valve
- figure 5, general view of the piston with gaskets, according to claim no. 3
- figure 6, overall view of the pump, longitudinal section;
- section A - A - view through multiple valve
- section X - X - view through the spherical bolt of the sealing chamber
- sect - P - P - view in the sense of flow through the multiple valve Downhole piston pump for hydrocarbons exploitation
According to the invention, the pump is working inside some tubing pipes 1 , according to figure 6, which consists of a drive head 2, two nuts 3, a polished rod 4, a drive shaft 4, a threaded nuts 5, two nuts 6 , a tamping ring 7, a guide nut 8, nine sealing nuts 9, greasing grease of the polished rod 4, sealing 10, greasing grease 11 , a buffer shaft 12, a guide bush 13, three threaded pins 14, a shell 15, a spherical bolt 16, a nut 17, six screws 18, six elastic shaft 19, a spherical ring 20, a spherical guide 21 , a nut 22, two nuts 23, six shock absorbers 24, six buffer pins. 25, a dosing flange 26, six adjusting washers 27, six springs 28, six guide pins 29, a valve block 30, six balls 31 , a valve seat 32, a valve bracket 33, two centering pins 34 , a reduction 35, a fixing bracket 36, a fixing nipple 37, support rings 38, four seals 39, three special adjustment rings 40, one adjusting bushing 41 , one locking nut 42, one adapter 43, one adapting extension 44, pump cylinder 45, top cage plunger 46, two elastic rings 47, a wiper 48, a piston reduction 49, a piston rod 50, a adjusting thread bushing 52, 36 seals 53, a adjusting shaft 54, two secured nuts 55, a reduction 56, cage 57, ball 58, valve seat 59, nut 60, and seat fixing screw 61. Optionally on the cylinder can be mounted: extension 62, cage 63, ball 64, ball seat 65, reduction 66, nut 67 and a filter 68.
As can be seen, this is a pump with an absorption chamber that is formed at the downstream stroke of the piston, and at the upward stroke, this chamber, turns into a discharge chamber due to the sealing box and the multiple valve.