Packing replacing tool

Abstract

The utility model discloses a packing replacing tool which comprises a fixing assembly and a supporting and pressing assembly. According to the packing replacing tool, the whole tool is fixed to a polish rod through the fixing assembly, the pressing rod is rotated to drive the supporting rod and the pressure tongue to move downwards, pressure is transmitted to a new packing to be installed, the packing in a packing box is compacted according to the lever principle, the packing does not need to be smashed into the packing box through a hand hammer in cooperation with other tools, and the packing replacing tool is simple in structure and convenient to use. The situation that operators, new packing and the packing box are damaged is effectively avoided, and the safety coefficient is increased; the oil well packing replacement device is simple in structure and convenient to operate, shortens oil well packing replacement time, reduces labor intensity of operators and improves production efficiency.

Description

Technical Field

[0001] The utility model relates to a packing replacement tool and belongs to the technical field of oil field supporting equipment. Background Art

[0002] The rod sealer, also known as packing box, is a dynamic sealing device for the wellhead used to seal the annular space between the oil pipe and the rod. It adopts multi-stage sealing, has good sealing effect, is resistant to high pressure, and is designed with a universal joint to adjust the eccentricity and angle. It is especially suitable for oil wells with deviated wellheads and has the function of automatic deviation adjustment and pressure compensation.

[0003] When the production equipment has internal leakage and the seal is ineffective, it is necessary to replace the packing with a new one. When replacing, the packing usually needs to be cut into appropriate ring lengths, with a 45-degree incision to ensure that there are no gaps at the interface of the packing, and then filled into the packing cavity of the equipment.

[0004] At present, when operators replace new packing, they need to use a hand hammer and other tools to hammer the new packing to compact the packing more easily. This operation damages the new packing, the efficiency of packing installation is low, and the operator is prone to hurting his fingers and the threads on the top of the packing box during the operation.

[0005] Therefore, it is necessary to develop a new type of packing replacement tool to solve the above problems. Summary of the invention

[0006] The utility model aims to provide a packing replacement tool which is simple to operate, has a high safety factor and does not cause damage to the packing and the packing box.

[0007] In order to achieve the above object, the utility model provides the following technical solutions:

[0008] A packing replacement tool, comprising:

[0009] A fixing assembly; the fixing assembly is clamped on the polished rod at the wellhead of the oil well;

[0010] A supporting and pressing assembly; the supporting and pressing assembly includes a pressure rod hinged to the fixed assembly, a support rod that moves vertically up and down driven by the pressure rod, and a pressure tongue arranged at the lower end of the support rod, the pressure rod includes a free end and a fixed end opposite to the free end, the fixed end is hinged to the fixed assembly, and the lower end of the pressure tongue is provided with a supporting and pressing block adapted to the packing box to compact the packing in the packing box when moving vertically up and down.

[0011] Furthermore, the fixing assembly includes a fixing ring clamped on the light rod, a connecting tube mounted on the light rod, and a connecting sleeve detachably connected to the connecting tube, the lower end of the fixing ring is detachably connected to the upper end of the connecting tube, the connecting tube and the light rod are clearance-matched, a through cavity is provided on the connecting sleeve, the support rod is passed through the through cavity, a gear hinged to the connecting sleeve is provided on the fixed end, the support rod is a rack meshingly connected to the gear, and the gear rotates under the drive of the pressure rod to drive the support rod to move vertically up and down.

[0012] Further, the fixing ring comprises a first half ring and a second half ring which can be assembled with each other, one end of the first half ring is hinged to one end of the second half ring, the other end of the first half ring is detachably connected to the other end of the second half ring by bolts, and when the first half ring and the second half ring are assembled with each other, the shape formed by the inner edge of the first half ring and the inner edge of the second half ring is matched with the outer edge of the bare rod.

[0013] Furthermore, flexible gaskets are provided on the first half ring and the second half ring, and the two flexible gaskets are respectively fitted with the inner edges of the first half ring and the second half ring.

[0014] Furthermore, the supporting and pressing assembly also includes a limiting ring mounted on the light rod, the limiting ring being detachably connected to the lower end of the supporting rod, the limiting ring including a first half ring and a second half ring which can be assembled with each other, one end of the first half ring and one end of the second half ring being hinged, the other end of the first half ring and the other end of the second half ring being detachably connected by bolts, and the limiting ring after assembly is loosely matched with the light rod.

[0015] The beneficial effects of the utility model are:

[0016] The packing replacement tool provided by the utility model fixes the entire tool on the bare rod through a fixing assembly, drives the support rod and the pressure tongue to move downward by rotating the pressure rod, transmits the pressure to the new packing to be installed, and utilizes the lever principle to compact the packing in the packing box, without the need to use a hand hammer or other tools to hammer the packing into the packing box, effectively avoiding damage to the operator, the new packing and the packing box, and improving the safety factor; the operation is convenient, the replacement time of the oil well packing is shortened, the labor intensity of the operator is reduced, and the production efficiency is improved.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a packing replacement tool shown in a preferred embodiment of the utility model;

[0020] Figure 2 It is a partial structural schematic diagram of a packing replacement tool shown in a preferred embodiment of the utility model.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Fixed ring; 2. Connecting sleeve; 3. Pressure rod; 4. Support rod; 5. Gear; 6. Pressure tongue; 7. Limiting ring; 8. Support and pressure block; 9. Connecting tube. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a detachable connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 to Figure 2As shown, the packing replacement tool shown in one embodiment of the utility model is suitable for replacing the packing on the oil well polished rod sealer. The tool effectively avoids the damage to the operator, the new packing and the packing box during the packing replacement process, improves the safety factor, is easy to operate, shortens the replacement time of the oil well packing, reduces the labor intensity of the operator, and improves the production efficiency. It includes: a fixing component and a supporting and pressing component.

[0027] The fixing assembly is clamped on the polished rod at the wellhead of the oil well, and includes a fixing ring 1 clamped on the polished rod, a connecting tube 9 sleeved on the polished rod, and a connecting sleeve 2 detachably connected to the connecting tube 9. The lower end of the fixing ring 1 is detachably connected to the upper end of the connecting tube 9, and the connecting tube 9 is loosely matched with the polished rod. A through cavity is provided on the connecting sleeve 2.

[0028] Specifically, the fixing ring 1 includes a first half ring and a second half ring that can be assembled with each other, one end of the first half ring and one end of the second half ring are hinged, and the other end of the first half ring and the other end of the second half ring are detachably connected by bolts. When the first half ring and the second half ring are assembled with each other, the shape formed by the inner edge of the first half ring and the inner edge of the second half ring is matched with the outer edge of the light rod, so that the fixing ring 1 is locked and fixed on the light rod. Both the first half ring and the second half ring are provided with flexible gaskets, and the two flexible gaskets are respectively fitted with the inner edges of the first half ring and the second half ring, further improving the fixing effect. The connecting tube 9 includes a first half tube and a second half tube that can be assembled with each other, one end of the first half tube and one end of the second half tube are hinged, and the other end of the first half tube and the other end of the second half tube are detachably connected by bolts, and the assembled connecting tube 9 is gap-matched with the light rod. The upper end of the inner wall of the connecting tube 9 is provided with an annular slide rail, and the lower end of the outer wall of the fixing ring 1 is provided with an annular outer edge corresponding to the annular slide rail, and the connecting tube 9 can rotate around the axis of the fixing ring 1.

[0029] The supporting and pressing assembly includes a pressure rod 3 hinged to the fixed assembly, a support rod 4 that moves vertically up and down driven by the pressure rod 3, and a pressure tongue 6 arranged at the lower end of the support rod 4. The pressure rod 3 includes a free end and a fixed end opposite to the free end. The fixed end is hinged to the fixed assembly. The lower end of the pressure tongue 6 is provided with a supporting and pressing block 8 that is compatible with the packing box to compact the packing in the packing box when moving vertically up and down.

[0030] As described above, the connecting sleeve 2 of the fixed component is provided with a through cavity, the support rod 4 is inserted into the through cavity, and the fixed end is provided with a gear 5 hinged to the connecting sleeve 2. The support rod 4 is a rack meshing with the gear 5. The gear 5 rotates under the drive of the pressure rod 3 to drive the support rod 4 to move vertically up and down. By rotating the pressure rod 3, the support rod 4 and the pressure tongue 6 move downward, the pressure is transmitted to the new packing to be installed, and the packing in the packing box is compacted by the lever principle, which greatly reduces the labor intensity and work risk of the operator.

[0031] The support and pressure assembly also includes a limit ring 7 sleeved on the polished rod, the limit ring 7 is detachably connected to the lower end of the support rod 4, the limit ring 7 includes a first half ring and a second half ring that can be assembled with each other, one end of the first half ring and one end of the second half ring are hinged, the other end of the first half ring and the other end of the second half ring are detachably connected by bolts, and the assembled limit ring 7 is loosely matched with the polished rod. The limit ring 7 can effectively prevent the pressure tongue 6 from deviating in the horizontal direction during the process of compacting the packing, thereby ensuring the installation effect of the packing.

[0032] As described above, the connecting tube 9 can rotate around the axis of the fixing ring 1. During the installation of the packing, the fixing ring 1 remains stationary. After each packing is compacted, the connecting tube 9, the connecting sleeve 2, the support rod 4, and the limiting ring 7 rotate around the axis of the polished rod driven by the pressure rod 3 to gradually compact all the packing.

[0033] In summary, the packing replacement tool provided by the utility model fixes the entire tool on the bare rod through a fixing assembly, and drives the support rod and the pressure tongue to move downward by rotating the pressure rod, so as to transfer the pressure to the new packing to be installed, and utilizes the lever principle to compact the packing in the packing box, without the need to use a hand hammer or other tools to hammer the packing into the packing box, thus effectively avoiding damage to the operator, the new packing and the packing box, and improving the safety factor; the operation is convenient, the replacement time of the oil well packing is shortened, the labor intensity of the operator is reduced, and the production efficiency is improved.

[0034] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A packing replacement tool, characterized in that: include: Fixing components; The fixing assembly is clamped on the polished rod at the wellhead of the oil well; A supporting and pressing assembly; the supporting and pressing assembly includes a pressure rod hinged to the fixed assembly, a support rod that moves vertically up and down driven by the pressure rod, and a pressure tongue arranged at the lower end of the support rod, the pressure rod includes a free end and a fixed end opposite to the free end, the fixed end is hinged to the fixed assembly, and the lower end of the pressure tongue is provided with a supporting and pressing block adapted to the packing box to compact the packing in the packing box when moving vertically up and down.

2. The packing replacement tool according to claim 1, characterized in that: The fixing assembly includes a fixing ring clamped on the light rod, a connecting tube sleeved on the light rod, and a connecting sleeve detachably connected to the connecting tube. The lower end of the fixing ring is detachably connected to the upper end of the connecting tube. The connecting tube is clearance-matched with the light rod. A through cavity is provided on the connecting sleeve. The support rod is inserted into the through cavity. A gear hinged to the connecting sleeve is provided on the fixed end. The support rod is a rack meshing with the gear. The gear rotates under the drive of the pressure rod to drive the support rod to move vertically up and down.

3. The packing replacement tool according to claim 2, characterized in that: The fixing ring comprises a first half ring and a second half ring which can be assembled with each other, one end of the first half ring is hinged with one end of the second half ring, the other end of the first half ring is detachably connected with the other end of the second half ring by bolts, and when the first half ring and the second half ring are assembled with each other, the shape formed by the inner edge of the first half ring and the inner edge of the second half ring is matched with the outer edge of the light rod.

4. The packing replacement tool according to claim 3, characterized in that: Flexible gaskets are provided on the first half ring and the second half ring, and the two flexible gaskets are respectively fitted with the inner edges of the first half ring and the second half ring.

5. The packing replacement tool according to claim 1, characterized in that: The supporting and pressing assembly also includes a limiting ring sleeved on the light rod, the limiting ring is detachably connected to the lower end of the supporting rod, the limiting ring includes a first half ring and a second half ring which can be assembled with each other, one end of the first half ring and one end of the second half ring are hinged, the other end of the first half ring and the other end of the second half ring are detachably connected by bolts, and the limiting ring after assembly is loosely matched with the light rod.

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