RU96917U1 - DRIVE BORE DRUM PUMPS - Google Patents

Abstract

 A drive of sucker-rod pumps, comprising a frame mounted on the base and an engine mounted on it, a mechanism for converting rotational motion into a reciprocating mechanism, including a gearbox with a crank, a mast, on top of which there are mounted rigidly interconnected drums with one end fixed to them ropes forming three cable pairs, with the other end one cable pair connected to the suspension, the other cable couple connected to the second suspension, the third cable couple connected to the tivovesom, and the ratio of drum diameters equal to the ratio of length rods moves the columns, characterized in that the drive additionally comprises two drum rigidly impaled on a common shaft, each of which comprises a cable, one end of which is fixed on the drum, and the other is articulated to the crank.

Description

Appendix No. 2 to the Extradition Decision on Application No. 2009119094/06

Well sucker rod drive

The utility model relates to the oil industry, namely, technical means for lifting fluid from wells during simultaneous and separate operation of two layers in one well with two sucker rod pumps.

A well-known sucker rod pump drive ", made in the form of a rocking machine, containing on the base of the frame and placed on it a motor, a mechanism for converting rotational motion into reciprocating, including a gear with a crank, a mast, on top of which are rigidly connected between themselves drums with ropes fixed to them at one end, forming three rope pairs, with the other end one rope pair connected to the suspension, the other rope pair connected to the second suspension, and t etya cable pair is connected to the counterweight, wherein the ratio of the diameters of the reels is equal to the ratio between the stroke rod columns. (RU No. 2351802 C1, 04/10/2009,)

The disadvantages of the drive are the small stroke length of the rods and the large metal consumption.

The task posed in this utility model is to increase the stroke length of the rods and reduce the metal consumption.

The stated technical problem is achieved due to the fact that the drive of sucker-rod pumps containing a frame mounted on the base and placed on it, a mechanism for converting rotational motion into reciprocating, including a gearbox with a crank, a mast on the top of which are rigidly connected to a common shaft between themselves drums with ropes fixed to them at one end, forming three rope pairs, with the other end one rope pair connected to the first suspension, the other rope pa is connected to the second suspension, the third rope pair is connected to the counterweight, and the ratio of the diameters is equal to the ratio of the stroke lengths of the rod columns, additionally contains two drums rigidly mounted on a common shaft, each of which contains a rope, one end of which is fixed to the drum, and the other is articulated connected to the crank.

Figure 1 shows the drive, side view.

Figure 2 is a front view.

The drive contains a base 2 mounted on a reinforced concrete slab 1 with an adjustable support 3, a frame 4, with a gearbox 5 placed on it, driven by an engine 6, a mast 7, on top of which a shaft 8 with rigidly mounted drums 9, 9a, 10, 11 is placed on which the ends of the rope pairs 12, 12a, 13, 14 are fixed, connected by the second ends respectively to the suspensions 15, 15a, the counterweight 16 and the crank 17, by means of the hinge 18. The drive contains adjusting mechanisms 19 and 20.

The device operates as follows:

Pre-prepare the site in front of the well for installing the drive. After delivery and assembly, the drive is mounted on a reinforced concrete slab 1. A cable pair 12 is fixed at one end to the drum 9 having the largest diameter, and connected to the suspension 15 with a long stroke at the second end. The cable pair 12a is fixed at one end to the drum 9a, and connected to the suspension 15a at the other end. The rope pair 13 is fixed at one end to the drum 10, and the second end is connected to the counterweight 16. The ropes 14 are fixed at one end to the drums 11, the other end is connected to the corresponding cranks 17. By means of adjusting mechanisms 19 and 20, the drive is mounted so that the rope pairs 12 and 12a were strictly above the suspensions 15 and 15a, respectively. Drums 9, 9a, 10 and 11 of the required diameter are installed in advance.

The ratio of diameters 9 and 9a should satisfy the following expression (1):

D / d- = S / s, (1)

where, D is the diameter of the drum associated with the suspension having a long stroke, m;

d is the diameter of the drum associated with the suspension having a shorter stroke length, m;

S - suspension travel length, large, m;

s is the suspension stroke length, shorter, m;

For example: Suspension stroke 15 is S = 6M, the diameter of the corresponding drum is D = 0.84 m, suspension stroke 15a should be s = 4 m, then the diameter of the smaller drum will be:

d = 0.84 × 4/6 = 0.56 m.

The weight of the counterweight 16 can be calculated by the formula (2):

Ppr≤ (D * Pmin + d * Pmin, a) / Dpr, H (2)

where, Pmin - the smallest load on the suspension of a greater stroke length, H;

Pmin, a - the smallest load on the suspension of a shorter stroke length, H;

Dpr is the diameter of the drum associated with the counterweight, m. For example: Pmin = 36064H, Pmin, a = 17652H, Dpr = 0.8 m, then Ppr will be less than or equal to:

Rpr ** (0.84 × 36064 + 0.56 * 17652) / 0.8≤50223.6 H

The diameter of the drums 11 associated with the cranks can be calculated by the formula (3):

Dcr = 2 * Rcr * D / S (3) where, Ccr is the radius of the crank, m;

Dcr is the diameter of the drums associated with the cranks, m;

For example: Kkr = 1.5 m, D = 0.84M S = 6 m

Dcr = 2 * 1.5 * 0.84 / 6 = 0.42 m

The balancing of the crank is carried out in a known manner, but it must be borne in mind that the maximum load on the crank is calculated by the formula (4):

Pmax, k = (D * Pmax + d * Pmax, a - Dpr * Ppr) / Dcr, H (4)

For example: Рmах = 59584Н, Рmах.а = 35292Н, then the maximum load on the crank will be equal to:

Pmax, k = (0.84 * 59584 + 0.56 * 35292-0.8 * 50223.6) / 0.42 = 70560H

After the installation and adjustment of the drive are completed, the engine 6 starts. When the crank 17 moves down, the drum 11 untwists while rotating the shaft 8. Since the total moment of forces applied to the drums 9 and 9a is partially balanced by the counterweight 16, it is enough to apply a slight force to the drum 11, to provide the suspension 15, 15 a. When the drums rotate, the corresponding rope pairs are wound on them. When the crank moves upward, the total moment of force created by the rod columns is greater than the moment of force created by the counterweight, while the rod goes down, unwinding the rope pairs 12, 12a from the pulleys 9, 9a and winding the rope pairs 13 and 14 onto the drums 10 and 11, raising counterweight 16. The process then repeats.

The drive of borehole sucker rod pumps of this design allows to increase the stroke length of the boom columns while simultaneously operating two layers in one well with two sucker rod pumps, while the selection intensity can be individually adjusted for each pump by changing the diameters of the drums

Claims (1)

A drive of sucker-rod pumps, comprising a frame mounted on the base and an engine mounted on it, a mechanism for converting rotational motion into a reciprocating mechanism, including a gearbox with a crank, a mast, on top of which there are mounted rigidly interconnected drums with one end fixed to them ropes forming three rope pairs, with the other end one rope pair connected to the suspension, the other rope pair connected to the second suspension, the third rope pair connected to the tivovesom, and the ratio of drum diameters equal to the ratio of length rods moves the columns, characterized in that the drive additionally comprises two drum rigidly impaled on a common shaft, each of which comprises a cable, one end of which is fixed on the drum, and the other is articulated to the crank.