RU2761145C1 - Sucker rod support device - Google Patents

Abstract

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, and in particular to a device for holding a sucker rod string. The device contains a body with a hole for the stem. The body consists of two half-cases 4 and 5, connected relative to each other by a threaded compression mechanism in the form of cylindrical pins located on both sides, inserted into the main 7 and additional holes 8 and 8' of the half-cases 4 and 5, respectively. Each pin is equipped with a thread for at least one corresponding nut 10. Each of the half-bodies 4 or 5 is provided with a longitudinal hole relative to the hole under the stem for the corresponding branch of the wellhead drive cable pair and a holder with a roller designed to interact with the stem. The rollers of the half-bodies 4 and 5 are sawn off with the possibility of rolling along the rod when the threaded compression mechanisms are loosened with the straightening of the curvature of the rod.

EFFECT: invention is aimed at expanding the functionality of the device.

2 cl, 5 dwg

Description

The proposal relates to the oil industry, in particular to equipment for deep-well pumping of oil from a well using a pumping unit, and can be used to clamp a polished rod and hold a sucker rod string on the suspension beam of the pumping unit.

There is a known device for preventing the rope exit from the traverse of the wellhead rod suspension (patent for PM No. 194504, IPC F04B 47/02, publ. 12.12.2019, bull. No. 35) including a detachable connection, contains two plates made of the same flat rectangular, each with one stepped edge bent inward at a right angle with a hole located closer to the other flat edge of the plate, while the height of each of the plates corresponds to the distance between the upper end of the upper part and the lower end of the lower part of the traverse, and the overall length of the plates in the assembly, connected through the holes by a split connection, corresponds to the overall length between the lateral ends of the traverse, while the height of the inner bend corresponds to the wall thickness of the traverse grooves, the length of the next inner step of the plates corresponds to the distance from the end of the traverse to the lateral surface of the damping glasses, and the height of the next bend of the plates corresponds to the width of the slots of the traverse.

The disadvantages of the known device are low reliability due to possible deformation of the polished rod, as well as increased complexity of the product due to the presence of a stepped edge of the plate bent at right angles inward, and increased labor intensity of manufacturing.

The closest analogue is a clamp for holding a string of sucker rods (patent for IZ No. 2746330, IPC E21B 19/10, publ. 04/12/2021, bull. No. 11), containing a body with a hole for the rod, consisting of two half-bodies connected by a rotation mechanism relative to each other from one end, and from the second end - equipped with a threaded compression mechanism in the form of a cylindrical pin with a thread for at least one corresponding nut inserted into the landing through holes of the corresponding half-cases, the half-case and their mounting holes are made the same, the rotation mechanism is made in the form a spring plate rigidly connected by its ends with the corresponding half-bodies and working for expansion, and the body on the side of the spring plate is equipped with an additional hole for the mounting protrusion of the traverse, while the hole for the rod in each half-body has a radius corresponding to the maximum diameter of the rod that the clamp can capture, and the distance between the remote and bore points when the half-bodies are compressed does not exceed the size of the minimum stem diameter that the clamp can grip.

The disadvantage of the known device is a narrow area of application, since when the polished rod is deformed, it is not possible to straighten it without the use of additional devices. Likewise, the clamping device does not prevent the exit of the polished rod.

The technical objective of the proposed invention is to create a universal device for holding a string of sucker rods, which allows to expand functionality due to additional straightening of the polished rod and strengthening of the traverse structure without disassembling and replacing it, as well as actively protecting it from destruction with increasing loads due to preventing the exit of the polished rod ...

The technical problem is solved by a device for holding a string of sucker rods, consisting of two half-cases connected relative to each other at one end and equipped with a threaded compression mechanism in the form of a cylindrical pin threaded for at least one corresponding nut inserted into the main landing through holes of the corresponding half-cases.

The novelty is that the half-cases are connected relative to each other by a compression mechanism in the form of a cylindrical threaded pin with a corresponding nut inserted into the additional mounting holes of the half-cases. Each of the half-bodies is equipped with a holder with a roller relative to the hole for the rod, with the possibility of rolling along the polished rod when the threaded compression mechanisms are loosened with the straightening of the curvature of the polished rod.

It is also new that a groove is made in at least one of the half-bodies, into which a replaceable plate is inserted for fixing a polished rod of the corresponding size when the half-bodies are compressed.

Figure 1 shows a general view of a device for holding a string of sucker rods.

FIG. 2 is a top view.

FIG. 3 is a sectional view AA.

FIG. 4 is a sectional view BB.

FIG. 5 is a cross-sectional view BB.

A device for holding a string of sucker rods (not shown) contains a housing 1 (Figs. 1-5) with an opening 2 (Figs. 1, 2 and 4) for a polished wellhead rod 3, connected from above to a string of rods at the wellhead (not shown) ... The body 1 consists of two half-cases 4 and 5, connected relative to each other by a threaded compression mechanism in the form of cylindrical pins 6 (bolt, hairpin, etc.) located on both sides, inserted into the main 7 (Figs. 3 and 5) and 7 ' and additional openings 8 and 8 'of the half-shells 4 (Fig. 4) and 5, respectively. Moreover, each pin 6 is equipped with a thread 9 for at least one corresponding nut 10. Each of the half-housings 4 (Fig. 1) or 5 is provided from one edge with a hole 11 longitudinal relative to the hole 2 under the rod 3 for the corresponding branch of the pair cable of the wellhead drive (not shown) and the corresponding holder 12 or 13 with a roller 14 or 15, made with the possibility of interaction with the polished rod 3. In this case, the rollers 14 and 15 of the half-bodies 4 and 5 are sawn with the possibility of rolling along the polished rod 3 when the nuts 10 of the pins 6 of the threaded compression mechanisms are loosened with straightening curvatures of the polished rod 3. To fix the polished under compression half-bodies 4 and 5 of the rod 3 of various sizes at least one of the half-bodies 5 (Fig. 4) and / or 4, a groove 16 can be made into which a replaceable plate 17 of the corresponding size is inserted into the polished rod 3 ...

Structural elements and technological connections, which do not affect the operability of the device in the drawings (Fig. 1-5) are not shown or are shown conditionally.

The clamp works as follows.

Two identical half-shells 4 (Fig. 1, 2, 3 and 4) and 5 are made, forming the case 1, with a hole 2 and corresponding holes 7 (Fig. 3), 7 'and 8 (Fig. 5), 8', which greatly simplifies the manufacture, repair and maintenance of the clamp. The hole 2 for the stem in each half-case is made so that the radius R of the hole 2 corresponds to the maximum diameter of the stem 3 (in practice, R = 19 mm, which corresponds to the diameter of the stem D _max = 38 mm), and a groove 16 is cut on one side of the half-case 4 or 5 (Fig. 4), where a plate 17 is inserted for fixing the rod 3 of various sizes. This design of one of the half-bodies allows the use of a clamp on rods 3 with a diameter of 32 mm to 38 mm, which significantly reduces the number of standard sizes of required clamps. Assembly and disassembly of half-cases 4 (Figs. 1 and 2) and 5 does not require special tools and adjustment of all parts. In the landing through holes 7 (Fig. 3), 7 'and 8 (Fig. 5), 8' of the half-cases 4 and 5, a pin 6 was inserted in the form of a hairpin with washers (shown conditionally - to reduce friction during rotation) and thread 9, on which the nut 10 is screwed on by preliminarily tightening the half-cases 4 (Fig. 4) and 5 and fixing the plate 17. In this case, the hole 2 remains open for the passage of the rod head. The assembled clamp using the holes 11, put on the landing protrusion (not shown), is installed on the traverse (not shown) so that hole 2 (Figs. 1 and 3) is located above the hole (not shown) of the traverse for the stem 3. After inserting the stem 3 into the hole of the traverse and the hole 2 of the housing 1 by rotating the nut 10 on the thread 9, the pins of the half-body 4 and 5 are compressed, fixing the plate 17 until it covers the rod 3 below its head (not shown). Thus, the rod 3 is securely fixed by a clamp on the traverse (not shown) of the rope suspension, allowing it to work in normal mode. To straighten, the deformed (curved) rod 3 is loosened by the threaded compression mechanism of the half-shells 4 and 5 by loosening the nut 10 on the thread 9 from both sides, without disassembling the assembly is carried out relative to the rod 3 from bottom to top by rollers 14 and 15 installed on the corresponding holders 12 or 13 on half-shells 4 and 5, using a pumping unit, pre-fixing the polished rod at the wellhead (not shown). In this case, removing and holding the clamp from the crosshead is not required.

The proposed device for holding a string of sucker rods, allowing to expand functionality by working with polished rods of various diameters, the possibility of additional straightening of the polished rod and strengthening the structure of the traverse without disassembly and replacement, as well as actively protect it from destruction with increasing loads due to prevention of exit polished stock.

Claims (2)

1. A device for holding a string of sucker rods, including a body with a hole for a rod, consisting of two half-bodies connected relative to each other, equipped at one end with a threaded compression mechanism in the form of a cylindrical pin with a thread for at least one corresponding nut inserted into the main landing through holes of the corresponding half-cases, characterized in that the half-cases are connected relative to each other at the second end by a threaded compression mechanism in the form of a cylindrical pin with a thread for at least one corresponding nut inserted into additional through-hole holes of the corresponding half-cases, each of the half-cases is provided with a longitudinal with respect to the hole for the rod with an opening for the corresponding branch of the paired line of the wellhead drive and a holder with a roller made with the possibility of interaction with the polished rod, while the rollers of the half-bodies are cut out so that they can be rolled along the polished w current when loosening the threaded compression mechanisms with straightening the curvature of the polished rod. 2. The device according to claim 1, characterized in that at least one of the half-bodies has a groove into which a replaceable plate is inserted for fixing a polished rod of the corresponding size when the half-bodies are compressed.

Images