A pumping unit rope unloading tool

Abstract

A pumping unit rope unloading tool. It includes a support, a fixed hook, a torsion spring, a pin, a sleeve, a spacer, a top pin and a spring. The pumping unit rope unloading tool provided by the present invention has the following beneficial effects: the opening of the support is closed by four fixed hooks, and the arc-shaped hooks on the four fixed hooks can enter the interior of the opening on the support under the action of the torsion spring, so that the internal space of the support becomes smaller. While holding the support, press the two connecting handles together to open the arc-shaped hooks, making it easier for the light rod to enter the support. After releasing the handle, the arc-shaped hooks seal the support opening, so that the support tightly holds the light rod. The previous unloading operation steps are simplified, and the unloading tool is prevented from falling out. The tool is lightweight, easy to operate, safe and reliable, and has low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production with a pumping unit in an oil field, and in particular relates to an unloading tool for a rope hanger of the pumping unit. Background Art

[0002] During normal operation, the upper rope of a pumping unit drives a square clip mounted on the polished rod above the rope clip, moving the rod up and down, thereby extracting oil from the well. The lower portion of the polished rod passes through a packing box, which seals the rod. Many maintenance operations on a pumping unit, such as adjusting the stroke, centering the rod, replacing the hairpin, pumping, power diagram testing, and repairing and replacing load cells, require removing the load from the rod. Traditionally, there are two ways to remove the load: First, stop pumping, insert a new square clip into the polished rod below the rope clip, restart pumping, and lower the rod until the new square clip falls onto the packing box. Once pumping is stopped, the new square clip acts as a support, freeing the square clip on the upper side of the rope clip. The square clip can then be removed, allowing equipment on the rope clip to be replaced or installed. After the maintenance operation, the square clip is reinstalled on the upper side of the rope hanger, and then the polished rod is moved up to make the new square clip detach from the packing box. Normal operation can be restored by removing the new square clip. This operation is not only time-consuming and labor-intensive, but also the part of the new square clip that damages the polished rod will enter the packing box, thereby increasing the wear of the packing on the polished rod, causing material loss and wellhead pollution. The second method is to use a steel pipe with a side opening to cover the polished rod on the upper side of the packing box. After the extraction is started, the new square clip falls on the top of the steel pipe, so as not to damage the packing box. However, the disadvantage is that the steel pipe is easily ejected due to uneven force during the unloading process, so there is a great safety hazard. Summary of the Invention

[0003] In order to solve the above problems, the object of the present invention is to provide a pumping unit rope unloading tool.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an oil pumping unit rope unloading tool comprising a support, a fixing hook, a torsion spring, a pin shaft, a sleeve, a spacer, a top pin and a spring; wherein, the support is made of a thick-walled steel pipe, an opening is formed on the outer wall along the axis, and the width of the opening is greater than the diameter of the polished rod; a pair of sleeves with the upper and lower axes centered are symmetrically welded to the upper and lower parts of the outer wall on both sides of the opening of the support, and a pin shaft is inserted into each pair of sleeves; a through hole is formed in the middle of the fixing hook along the vertical direction, and the middle of each pin shaft passes through a through hole on the fixing hook to fix the fixing hook between the pair of sleeves, and the arc-shaped hook at the front end of the fixing hook is located inside the opening on the support; the tail ends of the two fixing hooks on the same side of the support are connected together by a handle, and loosening or tightening the two handles can cause the fixing hook to rotate in the horizontal plane with the pin shaft as the axis, thereby so that the arc-shaped hook can enter and exit the opening; a torsion spring is also installed on each pin shaft, one end of the straight leg of the torsion spring is pinned to the outer wall of the support, and one end of the bent leg of the torsion spring is pressed against the outside of the fixed hook, so that the arc-shaped hook is always located inside the opening on the support when the handle is released; the top of the support on one side of the opening is recessed downward to form a circular hole, and a spring is installed at the bottom of the circular hole; the outer wall of the support is recessed inward to form a notch, the middle of the notch is connected to the middle of the circular hole, and the lower part of the outer end of the notch is just located inside the middle of the fixed hook closest to the notch; the pad is installed in the notch, and a threaded through hole is formed on the inner side in the vertical direction, and the outer side is located outside the outer end of the notch; the upper part of the ejector pin passes through the circular hole on the support, the middle part is threadedly connected to the threaded through hole on the pad, the lower end is pressed on the top of the spring, and the upper end protrudes above the circular hole.

[0005] The height of the outer port of the notch on the support is at least twice the height of the pad.

[0006] The thickness of the pad is the same as the width of the notch on the support.

[0007] The pumping unit rope unloading tool provided by the present invention has the following beneficial effects: Four fixed hooks seal the opening of the support bracket. The curved hooks on the four fixed hooks, activated by torsion springs, can enter the interior of the support bracket opening, reducing the internal space of the support bracket. While holding the support bracket, the two connecting handles are pressed together to open the curved hooks, facilitating the entry of the polished rod into the support bracket. When the handles are released, the curved hooks seal the support bracket opening, tightly holding the polished rod. This simplifies the previous unloading process and prevents the unloading tool from falling out. The tool is lightweight, easy to operate, safe, reliable, and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A three-dimensional diagram of the pumping unit rope unloading tool provided by the present invention.

[0009] Figure 2 A half-section view of the pumping unit rope unloading tool provided by the present invention;

[0010] Figure 3 This is a schematic diagram of the working process of the oil pumping unit rope unloading tool provided by the present invention. DETAILED DESCRIPTION

[0011] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0012] like Figure 1-Figure 3 As shown, the pumping unit rope unloading tool provided by the present invention includes a support 1, a fixing hook 2, a torsion spring 3, a pin 4, a sleeve 5, a pad 6, a push pin 7 and a spring 8; wherein, the support 1 is made of thick-walled steel pipe, and an opening is formed on the outer wall along the axis, and the width of the opening is greater than the diameter of the polished rod 11; a pair of sleeves 5 with the upper and lower axes centered are symmetrically welded to the upper and lower parts of the outer wall on both sides of the opening of the support 1, and a pin 4 is inserted into each pair of sleeves 5; a through hole is formed in the middle of the fixing hook 2 in the vertical direction, and the middle part of each pin 4 passes through a through hole on the fixing hook 2 to fix the fixing hook 2 between the pair of sleeves 5, and the arc-shaped hook 201 at the front end of the fixing hook 2 is located inside the opening on the support 1; the tail ends of the two fixing hooks 2 on the same side of the support 1 are connected together by a handle 202. Loosening or tightening the two handles 202 can make the fixing hook 2 rotate in the horizontal plane with the pin 4 as the axis. Thereby, the arc-shaped hook 201 can enter and exit the opening; a torsion spring 3 is also installed on each pin shaft 4, and one end of the straight leg of the torsion spring 3 is pinned on the outer wall of the support 1, and one end of the bent leg of the torsion spring 3 is pressed on the outside of the fixing hook 2, so that the arc-shaped hook 201 is always located inside the opening on the support 1 when the handle 202 is released; the top of the support 1 on one side of the opening is recessed downward to form a circular hole, and a spring 8 is installed at the bottom of the circular hole; the outer wall of the support 1 is recessed inward to form a notch, the middle part of the notch is connected to the middle part of the circular hole, and the lower part of the outer end of the notch is just located on the inner side of the middle part of the fixing hook 2 closest to the notch; the pad 6 is installed in the notch, and a threaded through hole is formed on the inner side in the vertical direction, and the outer side is located outside the outer end of the notch; the upper part of the ejector pin 7 passes through the circular hole on the support 1, and the middle part is threadedly connected to the threaded through hole on the pad 6, the lower end is pressed on the top of the spring 8, and the upper end protrudes above the circular hole.

[0013] The height of the outer end of the notch on the support 1 is at least twice the height of the cushion block 6 .

[0014] The thickness of the pad 6 is the same as the width of the notch on the support 1 .

[0015] The method of using the pumping unit rope unloading tool provided by the present invention is described as follows:

[0016] When unloading is required, the operator first stops pumping, and inserts a new square clip 10 into the position of the polished rod 11 at the lower side of the rope hanger. Then, the operator holds the two handles 202 on the fixed hook 2 by hand, so that the arc hooks 201 on the four fixed hooks 2 are opened outwards until the distance between the two arc hooks 201 at the same height is greater than the diameter of the polished rod 11. Then, the operator holds the handle 202 and places the lower end of the support 1 on the packing box 9, and the polished rod 11 enters the opening on the support 1. After releasing the handle 202, the fixed hook 2 rebounds under the action of the torsion spring 3, and the four arc hooks 201 enter the opening of the support 1 and block the polished rod 11. The operator then starts pumping again to move the polished rod 11 downward, and stops pumping immediately after the new square clip 10 falls on the support 1. The new square clip 10 serves as a support, so that the square clip on the upper side of the rope hanger is no longer under stress. At this time, the square clip can be removed to achieve unloading, and the equipment on the rope hanger can be replaced or installed afterwards. During the downward movement of the polished rod 11, when the new square clip 10 presses against the support 1, it simultaneously pushes down the ejector pin 7 on the top surface of the support 1. This pushor pin 7 then drives the spacer 6 downward, compressing the spring 8. The outer side of the spacer 6 then moves from a height above the fixed hook 2 to level with the fixed hook 2, thereby pressing against the back of the fixed hook 2, preventing the handle 202 on the fixed hook 2 from being pressed. This prevents the support 1 from coming off the polished rod 11 during unloading. After maintenance, the square clip is reinstalled on the upper side of the rope hanger. The polished rod 11 is then used to drive the new square clip 10 upward and away from the support 1. During this process, the ejector pin 7 is repelled by the spring 8, and the outer side of the spacer 6 moves away from the fixed hook 2. Finally, the support 1 can be removed from the polished rod 11 by manually pressing the two handles 202.

Claims

1. A pumping unit rope unloading tool, characterized by: The pumping unit rope unloading tool comprises a support (1), a fixing hook (2), a torsion spring (3), a pin (4), a sleeve (5), a spacer (6), a top pin (7) and a spring (8); wherein the support (1) is made of a thick-walled steel pipe, an opening is formed on the outer wall along the axis, and the width of the opening is greater than the diameter of the polished rod (11); a pair of sleeves (5) with the upper and lower axes aligned are symmetrically welded to the upper and lower parts of the outer wall on both sides of the opening, and a pin (4) is inserted into each pair of sleeves (5); A through hole is formed in the middle of the fixing hook (2) along the vertical direction. The middle of each pin shaft (4) passes through the through hole on a fixing hook (2) to fix the fixing hook (2) between a pair of shaft sleeves (5). The arc hook (201) at the front end of the fixing hook (2) is located inside the opening on the support (1); the tail ends of the two fixing hooks (2) on the same side of the support (1) are connected together by a handle (202). Loosening or tightening the two handles (202) can make the fixing hook (2) move in a horizontal plane with the pin shaft (4) as the axis. The handle (202) is rotated so that the arc hook (201) can enter and exit the opening; a torsion spring (3) is also installed on each pin shaft (4), one end of the straight leg of the torsion spring (3) is pinned on the outer wall of the support (1), and one end of the bent leg of the torsion spring (3) is pressed on the outside of the fixed hook (2), so that the arc hook (201) is always located inside the opening of the support (1) when the handle (202) is released; the top of the support (1) on one side of the opening is concave downward to form a circular hole, and a spring (8) is installed at the bottom of the circular hole; the support ( 1) is formed with a notch on the outer wall thereof, the middle of the notch is connected with the middle of the circular hole, and the lower part of the outer end of the notch is just located inside the middle of the fixing hook (2) closest to the notch; the pad (6) is installed in the notch, the inner side of which is formed with a threaded through hole in the vertical direction, and the outer side is located outside the outer end of the notch; the upper part of the ejector pin (7) passes through the circular hole on the support (1), the middle part is threadedly connected to the threaded through hole on the pad (6), the lower end is pressed on the top of the spring (8), and the upper end protrudes above the circular hole.

2. The pumping unit rope unloading tool according to claim 1, characterized in that: The height of the outer end of the notch on the support (1) is at least twice the height of the cushion block (6).

3. The pumping unit rope unloading tool according to claim 1, characterized in that: The thickness of the pad (6) is the same as the width of the notch on the support (1).

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