Unloading tool for beam hanger of oil pumping unit

Abstract

The invention discloses an unloading tool for a beam hanger of a pumping unit. The device comprises a bracket, a fixing hook, a torsion spring, a pin shaft, a shaft sleeve, a cushion block, a lifting pin and a spring. The unloading tool for the beam hanger of the oil pumping unit has the following beneficial effects that the opening of the support is closed through the four fixing hooks, and the arc-shaped hooks on the four fixing hooks can enter the interior of the opening in the support under the action of the torsional spring, so that the internal space of the support is reduced. When the support is held by a hand, the two connecting handles are pressed together, so that the arc-shaped hook is opened, and the polished rod can enter the support conveniently. And after the handle is loosened, the arc-shaped hook seals the opening of the bracket, so that the bracket tightly holds the polished rod. And the previous unloading operation steps are simplified, and the unloading tool is prevented from falling off. The tool is light in weight, easy to operate, safe, reliable and low in 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 hanging rope of a pumping unit. Background Art

[0002] When the pumping unit is operating normally, the upper rope hanger drives the light rod to move up and down by driving the square clip installed on the light rod and located on the upper side of the rope hanger, thereby extracting oil from the pumping well. The lower part of the light rod passes through the packing box, and the packing box is used to seal the light rod. In many maintenance operations of the pumping well, such as adjusting the stroke, centering the donkey head, replacing the hair braid, bumping the pump, power diagram testing, and repairing and replacing the load sensor, it is necessary to unload the donkey head load on the pumping unit. There are two traditional unloading methods: one is to stop pumping, drive a new square clip into the part of the light rod located on the lower side of the rope hanger, and then start pumping to move the light rod downward until the new square clip falls on the packing box and immediately stop pumping. The new square clip is used as a support, so that the square clip on the upper side of the rope hanger is no longer under force. At this time, the square clip can be removed to achieve unloading, and then the equipment on the rope hanger can be replaced or installed. After the maintenance operation, reinstall the square clip on the upper side of the rope hanger, then move the light rod upward to make the new square clip detach from the packing box, and remove the new square clip to resume normal operation. This operation is not only time-consuming and labor-intensive, but also the part of the new square clip that damages the light rod will enter the packing box, thereby increasing the wear of the light rod on the packing, causing material loss and wellhead pollution. The second method is to use a steel pipe with a side opening to cover the light rod on the upper side of the packing box, and after the pumping is started, the new square clip falls on the top of the steel pipe, so that the packing box will not be damaged. 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 an unloading tool for a rope hanger of an oil pumping unit.

[0004] In order to achieve the above-mentioned purpose, the unloading tool of the oil pump rope hanger provided by the present invention comprises a support, a fixing hook, a torsion spring, a pin shaft, a sleeve, a cushion block, 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 bare rod; a pair of sleeves centered on the upper and lower axes are symmetrically welded to the upper and lower parts of the outer wall on both sides of the opening, 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 part 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 make the fixing hook rotate in the horizontal plane with the pin shaft as the axis, so as to 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 attached to the outer wall of the support, and one end of the bent leg of the torsion spring is pressed on 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 on the inner side of 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 along 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 cushion block.

[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: the opening of the support is closed by four fixed hooks, and the arc 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, the two connecting handles are pressed together to open the arc hooks, so that the light rod can enter the support conveniently. After the handles are released, the arc 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 light in weight, simple to operate, safe and reliable, and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A stereoscopic view of the pumping unit rope unloading tool provided by the present invention.

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

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

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

[0012] like Figure 1-Figure 3 As shown, the unloading tool of the pumping unit rope hanger provided by the present invention comprises a support 1, a fixing hook 2, a torsion spring 3, a pin 4, a sleeve 5, a cushion block 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 bare rod 11; a pair of sleeves 5 centered on the upper and lower axes 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 along 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 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, and 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 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 fixing 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 located 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 along the vertical direction, and the outer side is located outside the outer end of the notch; the upper part of the top 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.

[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 cushion block 6 is the same as the width of the notch on the support 1 .

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

[0016] When unloading is required, the pumping is stopped first, and a staff member drives a new square clip 10 into the part of the bare rod 11 located at the lower side of the rope hanger, and then the two handles 202 on the fixed hook 2 are held tightly by hand to open the arc hooks 201 on the four fixed hooks 2 outward until the distance between the two arc hooks 201 at the same height is greater than the diameter of the bare rod 11; then the handle 202 is held by hand to place the lower end of the support 1 on the packing box 9, and the bare rod 11 enters the opening on the support 1, and after the handle 202 is released, 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 to block the bare rod 11. The pumping is started again to move the bare rod 11 downward, and the pumping is stopped immediately after the new square clip 10 falls on the support 1. The new square clip 10 is used as a support, so that the square clip on the upper side of the rope hanger is no longer subjected to force. At this time, the square clip can be removed to achieve unloading, and then the equipment on the rope hanger can be replaced or installed. During the downward movement of the bare rod 11, when the new square clip 10 is pressed on the support 1, the top pin 7 on the top surface of the support 1 will be pressed down at the same time. At this time, the top pin 7 will drive the cushion block 6 to move downward, and compress the spring 8 at the same time. At this time, the outer side of the cushion block 6 will move from a height higher than the fixed hook 2 to be flush with the fixed hook 2, thereby pressing the back of the fixed hook 2, so that the handle 202 on the fixed hook 2 cannot be pressed, thereby preventing the support 1 from falling off the bare rod 11 during the unloading process. After the maintenance operation, the square clip is reinstalled on the upper side of the rope hanger, and then the bare rod 11 is used to drive the new square clip 10 to move upward and leave the support 1. During this process, the top pin 7 will be bounced up by the spring 8, and the outer side of the cushion block 6 will leave the fixed hook 2. Finally, the support 1 can be removed from the bare rod 11 by pressing the two handles 202.

Claims

1. A pumping unit rope unloading tool, characterized in that: The pumping unit rope unloading tool comprises a support (1), a fixing hook (2), a torsion spring (3), a pin shaft (4), a sleeve (5), a cushion block (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 bare 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 of the support (1), and a pin shaft (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. 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-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). By loosening or tightening the two handles (202), the fixing hook (2) can be moved in a horizontal plane with the pin shaft (4) as the axis. The handle (202) is rotated so that the arc-shaped 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 fixed 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 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 ( The outer wall of the support (1) 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 fixing hook (2) closest to the notch; the cushion block (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 cushion block (6), the lower end is pressed on the top of the spring (8), and the upper end protrudes above the circular hole.

2. The unloading tool for the oil pumping unit hanging rope according to claim 1 is 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 unloading tool for the oil pumping unit hanging rope according to claim 1 is characterized in that: The thickness of the cushion block (6) is the same as the width of the notch on the support (1).

Images