Oil nozzle socket spanner

Abstract

The invention discloses an oil nozzle socket spanner which is characterized in that the oil nozzle socket spanner comprises a socket body, a center protection pipe and an oil nozzle connecting socket head are sequentially arranged in the socket body in the axial direction, and the center protection pipe is communicated with the oil nozzle connecting socket head; the central protective tube is used for placing a through needle; the oil nozzle connecting sleeve head is used for connecting an oil nozzle; a limiting body is arranged at the tail end of the through needle, and when the through needle extends into the oil nozzle through the tail end of the center protection pipe, the limiting body can be connected with the oil nozzle. The through needle extends into the oil nozzle through the center protection pipe, the limiting body is mainly used for clamping the oil nozzle, when the oil nozzle needs to be replaced or overhauled, the center protection pipe can guide the through needle to accurately extend into an inner hole of the oil nozzle, pressure discharging is accurately achieved, repeated pressure attempts are not needed, the pressure discharging efficiency is high, and matched connection of the through needle and the oil nozzle is achieved under the cooperation of the limiting body; and the oil nozzle is prevented from falling off in the taking-out process.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas development and relates to an oil nozzle socket wrench. Background Art

[0002] During the production process of oil and gas fields, checking and replacing fixed oil nozzles is a common and frequent operation. The original fixed oil nozzle outlet is installed in the oil nozzle sleeve in reverse and horizontally. When the production system needs to be adjusted, the oil nozzle is installed and removed by rotating the oil nozzle socket wrench forward and reversely by using the meshing action between the inner hexagon of the socket head of the oil nozzle and the outer hexagon of the oil nozzle.

[0003] In recent years, with the rapid development of oil and gas exploration technology, high-pressure and ultra-high-pressure oil and gas wells have appeared in China. In order to ensure that the fixed oil nozzle will not fall off due to high pressure and thread corrosion, the installation method is changed to a fixed oil nozzle with the outlet facing forward and installed vertically in the oil nozzle sleeve, and the oil nozzle sleeve and the oil nozzle jointly bear the high pressure.

[0004] However, in the current oil field production, with the improvement of technology, the fixed nozzle sleeve and nozzle are changed from the original horizontal installation to vertical installation. After the nozzle is removed by counterclockwise rotation, the removal of the nozzle depends entirely on the friction between the outer hexagonal head of the nozzle and the inner hexagonal head of the sleeve. The nozzle can easily fall off from the sleeve.

[0005] Before removing the fixed oil nozzle, use a clear needle to unclog the oil nozzle to eliminate residual pressure. Due to impurities such as sand, wax, mercury, etc. at the oil nozzle entrance, the oil nozzle hole cannot be directly seen. In addition, the diameter of the oil nozzle hole and the clear needle is small (usually 4mm-10mm), it is difficult to align the clear needle with the oil nozzle hole to discharge pressure. It takes many times to succeed, and the work efficiency is very low.

[0006] Although there is pressure relief during the operation, the impurities such as sand, wax, mercury, hydrogen sulfide generated in the production process, and the pressure inside the blockage formed under high pressure, ultra-high pressure and high temperature conditions cannot be completely released. Directly using a needle to release the residual pressure on the inner hole of the oil nozzle, the operator's head, face, hands, glasses and other parts may be injured by the residual pressure and toxic and harmful substances, posing a safety hazard.

[0007] During the production process, the media produced from the well along with oil and gas include toxic and harmful substances such as sand, wax, mercury, and hydrogen sulfide. Frequent use of manual fixed oil nozzles will have the risk of chronic or acute poisoning. Summary of the invention

[0008] The purpose of the present invention is to solve the problems in the prior art that the oil nozzle is very easy to fall off from the sleeve, the needle cannot be inserted into the oil nozzle hole accurately and quickly during pressure relief, multiple attempts are required, the efficiency of pressure relief is low, and the gas can easily cause harm to the human body during the pressure relief process. A nozzle socket wrench is provided to accurately achieve pressure relief, without the need for multiple attempts, and without the need for human eyes to detect whether the hole position is aligned. The pressure relief efficiency is high. When the needle is inserted into the inside of the oil nozzle for dredging, the residual pressure will be discharged through the central protective tube, and the discharge channel is fixed. The harmful gas inside will not directly contact the human body, thereby avoiding direct damage to the human body. Furthermore, the oil nozzle is disassembled by using the present device to avoid direct contact with the oil nozzle, thereby reducing the harm to the human body caused by harmful substances. The oil nozzle is disassembled by using the present device to avoid direct contact with the oil nozzle, thereby reducing the harm to the human body caused by harmful substances.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A nozzle socket wrench comprises a socket body, wherein a central protective tube and a nozzle connecting socket head are sequentially provided axially inside the socket body, and the central protective tube and the nozzle connecting socket head are communicated;

[0011] The central protective tube is used to place the pass needle, and the oil nozzle connecting sleeve head is used to connect the oil nozzle;

[0012] A limiting body is arranged at the end of the pass needle, and when the pass needle extends into the oil nozzle through the central protective tube, the limiting body can be connected with the oil nozzle.

[0013] A further improvement of the present invention is:

[0014] The limiting body comprises a card, and two ends of the card protrude from the outer side wall of the needle;

[0015] A through hole is provided on the through pin, and the card passes through the through hole, and the card can be swung left and right along the through hole.

[0016] The card is connected with the pass needle through a fixing pin.

[0017] A limiting rod is arranged at one end of the needle away from the limiting body, and the length of the limiting rod is greater than the diameter of the central protective tube.

[0018] A vent hole is also provided in the sleeve body, one end of the vent hole is connected to the oil nozzle and the sleeve head, and the other end is connected to the outside of the sleeve body.

[0019] The vent holes are provided with two.

[0020] The two vent holes are symmetrically opened along two sides of the central protective tube.

[0021] The vent hole is connected to the protective tube support at one end away from the oil nozzle connecting sleeve head;

[0022] The protective tube support is communicated with the outer end of the sleeve body.

[0023] It also includes a fixing pin hole, which passes through the sleeve body, the protective tube support and the central protective tube in sequence.

[0024] A sleeve force arm is arranged at the end of the sleeve body.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The invention discloses an oil nozzle socket wrench, wherein a pass needle is inserted into the oil nozzle through a central protective tube, and a limiting body is mainly used to clamp the oil nozzle. When the oil nozzle needs to be replaced or repaired, the central protective tube can guide the pass needle to accurately extend into the inner hole of the oil nozzle, and pressure discharge is accurately achieved without multiple attempts or human eye detection of whether the hole position is aligned. The pressure discharge efficiency is high, and with the cooperation of the limiting body, the pass needle and the oil nozzle are matched and connected to avoid the oil nozzle from falling off during the removal process. When the pass needle is inserted into the inside of the oil nozzle for unblocking, the residual pressure will be discharged through the central protective tube, and the discharge channel is fixed. The harmful gas inside will not directly contact the human body, thereby avoiding direct damage to the human body. Moreover, the oil nozzle is disassembled by using the device, thereby avoiding direct contact with the oil nozzle, and reducing the damage of harmful substances to the human body.

[0027] Furthermore, in the present invention, the card is rotatably connected to the needle. During the insertion process, the needle is shaken left and right, and the card is rotated and tilted, which facilitates the limited engagement of the card with the oil nozzle.

[0028] Furthermore, in the present invention, the length of the limiting rod is greater than the diameter of the central protective tube, so as to prevent the needle from falling off. After the operation is completed, the limiting rod can be lifted up to pull out the needle and clean the tool.

[0029] Furthermore, in the present invention, a vent hole is provided in the sleeve body, and the vent hole is communicated with the nozzle connecting sleeve head, so as to ensure that the internal pressure is quickly relieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the sleeve cylinder structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the needle-passing structure of the present invention.

[0033] Among them: 1-oil nozzle connecting sleeve head; 2-vent hole; 3-tube support; 4-fixing pin hole; 5-sleeve force arm rod; 6-center tube; 7-sleeve cylinder; 8-limit rod; 9-fixing pin; 10-card; 11-pass needle. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0035] The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed but is merely representative of selected embodiments of the present invention.

[0037] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed 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 connection 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.

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0043] See also Figure 1 The embodiment of the present invention discloses a nozzle socket wrench, through which a pass pin can be quickly and safely introduced into the inner hole of the nozzle, and the residual pressure can be discharged through a fixed discharge channel; the nozzle and the socket wrench are fixed together by using the pass pin, and the fixed nozzle can be removed by lifting.

[0044] include:

[0045] The oil nozzle is connected to the sleeve head 1; the vent hole 2; the protective tube support 3; the fixing pin hole 4; the sleeve force arm rod 5; the central protective tube 6; the sleeve cylinder 7; the limit rod 8; the fixing pin 9; the card 10 and the through needle 11.

[0046] Example 1

[0047] The embodiment of the present invention discloses a nozzle socket wrench, comprising a socket body 7, wherein a central protective tube 6 and a nozzle connecting socket head 1 are sequentially opened axially inside the socket body 7, wherein the central protective tube 6 and the nozzle connecting socket head 1 are communicated with each other; the central protective tube 6 is used to place a pass needle 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is arranged at the end of the pass needle 11, and when the pass needle 11 extends into the nozzle through the end of the central protective tube 6, the limiting body can be connected with the nozzle, and when the pass needle 11 is inserted into the interior of the central protective tube 6, there is a gap between the inner side wall of the central protective tube 6 and the pass needle 11, and the residual pressure will be discharged through the gap between the inner side wall of the central protective tube 6 and the pass needle 11.

[0048] When the present embodiment is in operation, the central protective tube 6 is correspondingly connected with the oil nozzle of the oil nozzle connecting sleeve head 1, and can guide the pass needle 11 to accurately enter the inner hole of the oil nozzle without multiple attempts. The efficiency of pressure relief is high. When the oil nozzle needs to be replaced or repaired, the pass needle and the oil nozzle are connected with the cooperation of the limit body to prevent the oil nozzle from falling off during the removal process.

[0049] In this embodiment, the harmful gas inside will not come into direct contact with the human body, thus avoiding direct damage to the human body. Moreover, the nozzle can be disassembled by using this device, thus avoiding direct contact with the nozzle, thus reducing the harm of harmful substances to the human body.

[0050] Example 2

[0051] The embodiment of the present invention discloses a nozzle socket wrench, including a socket body 7, wherein a central protective tube 6 and a nozzle connecting socket head 1 are sequentially provided axially inside the socket body 7, wherein the central protective tube 6 and the nozzle connecting socket head 1 are connected; the central protective tube 6 is used to place a pass needle 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass needle 11, and when the pass needle 11 extends into the nozzle through the end of the central protective tube 6, the limiting body can be connected to the nozzle. The limiting body includes a card 10, and the two ends of the card 10 protrude from the outer wall of the pass needle 11; a through hole is provided on the pass needle 11, and the card 10 passes through the through hole, and the card 10 can swing left and right along the through hole.

[0052] Furthermore, in the present embodiment, the body of the needle 11 is vertically distributed to the card 10, there is a gap between the card 10 and the through hole, the card 10 can rotate, the card 10 can swing left and right along the through hole, and the lengths of the two ends of the card 10 protruding from the outer wall of the needle 11 are different. Under the action of gravity, the needle is gently shaken to produce a displacement at a non-vertical angle, the card 10 can be inserted into the oil nozzle, and then the needle 11 is lifted vertically upwards. At this time, the card can clamp the oil nozzle, tighten the fixer, turn the socket wrench counterclockwise, take out the oil nozzle, and ensure that the oil nozzle will not fall off.

[0053] Example 3

[0054] The embodiment of the present invention discloses a nozzle socket wrench, comprising a socket body 7, wherein a central protective tube 6 and a nozzle connecting socket head 1 are sequentially provided axially inside the socket body 7, wherein the central protective tube 6 and the nozzle connecting socket head 1 are communicated; the central protective tube 6 is used to place a pass needle 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass needle 11, and when the pass needle 11 extends into the nozzle through the end of the central protective tube 6, the limiting body can be connected to the nozzle. The limiting body comprises a card 10, and both ends of the card 10 protrude from the outer wall of the pass needle 11; a through hole is provided on the pass needle 11, and the card 10 passes through the through hole, and the card 10 can swing left and right along the through hole, and the card 10 passes through the pass needle 11, and the card 10 and the pass needle 11 are connected by a fixing pin 9. The fixing pin 9 passes through the card 10 and the pass needle 11 in sequence.

[0055] Example 4

[0056] The embodiment of the present invention discloses a nozzle socket wrench, including a socket body 7, wherein a center protective tube 6 and a nozzle connecting socket head 1 are sequentially opened axially inside the socket body 7, and the center protective tube 6 and the nozzle connecting socket head 1 are connected; the center protective tube 6 is used to place a pass needle 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass needle 11, and when the pass needle 11 extends into the nozzle through the end of the center protective tube 6, the limiting body can be connected to the nozzle. A limiting rod 8 is provided at the end of the pass needle 11 away from the limiting body, and the length of the limiting rod 8 is greater than the diameter of the center protective tube 6.

[0057] In this embodiment, the limit rod 8 forms a force arm for the pass needle 11. When the pass needle 11 is in use, the limit rod 8 will be stuck outside the port of the central protective tube 6 to prevent the needle from falling into the oil nozzle sleeve or the downstream pipeline due to operational errors when it is lowered. After the operation is completed, the pass needle can be pulled out by lifting the force arm to clean the tool.

[0058] Example 5

[0059] An embodiment of the present invention discloses a nozzle socket wrench, comprising a socket body 7, wherein a center protective tube 6 and a nozzle connecting socket head 1 are axially opened in sequence inside the socket body 7, and the center protective tube 6 and the nozzle connecting socket head 1 are connected; the center protective tube 6 is used to place a pass needle 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass needle 11, and when the pass needle 11 extends into the nozzle through the end of the center protective tube 6, the limiting body can be connected to the nozzle, and a vent hole 2 is also opened in the socket body 7, one end of the vent hole 2 is connected to the nozzle connecting socket head 1, and the other end is connected to the outside of the socket body 7.

[0060] In this embodiment, the vent hole can help the internal gas to be discharged and accelerate the internal pressure relief.

[0061] Example 6

[0062] The embodiment of the present invention discloses a nozzle socket wrench, comprising a socket body 7, wherein a central protective tube 6 and a nozzle connecting socket head 1 are sequentially provided axially inside the socket body 7, wherein the central protective tube 6 and the nozzle connecting socket head 1 are communicated; the central protective tube 6 is used to place a pass pin 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass pin 11, and when the pass pin 11 extends into the nozzle through the end of the central protective tube 6, the limiting body can be connected to the nozzle, and a vent hole 2 is also provided inside the socket body 7, wherein one end of the vent hole 2 is communicated with the nozzle connecting socket head 1, and the other end is communicated with the outside of the socket body 7. Two vent holes 2 are provided.

[0063] Example 7

[0064] The embodiment of the present invention discloses a nozzle socket wrench, comprising a socket body 7, wherein a central protective tube 6 and a nozzle connecting socket head 1 are sequentially provided axially inside the socket body 7, wherein the central protective tube 6 and the nozzle connecting socket head 1 are communicated; the central protective tube 6 is used to place a pass pin 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass pin 11, and when the pass pin 11 extends into the nozzle through the end of the central protective tube 6, the limiting body can be connected to the nozzle, and a vent hole 2 is also provided inside the socket body 7, wherein one end of the vent hole 2 is communicated with the nozzle connecting socket head 1, and the other end is communicated with the outside of the socket body 7. Two vent holes 2 are provided, and the end of the vent hole 2 away from the nozzle connecting socket head 1 is communicated with a protective tube support 3; the protective tube support 3 is communicated with the outer end of the socket body 7.

[0065] In this embodiment, the protective tube support 3 plays a role in supporting and stabilizing the central protective tube 6 , ensuring the stability of the fixing of the supporting protective tube 6 , and the protective tube support 3 is welded to both sides of the central protective tube 6 .

[0066] Example 8

[0067] An embodiment of the present invention discloses a nozzle socket wrench, comprising a socket body 7, wherein a center protective tube 6 and a nozzle connecting socket head 1 are axially opened in sequence inside the socket body 7, and the center protective tube 6 and the nozzle connecting socket head 1 are connected; the center protective tube 6 is used to place a pass needle 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass needle 11, and when the pass needle 11 extends into the nozzle through the end of the center protective tube 6, the limiting body can be connected to the nozzle, and a vent hole 2 is also opened in the socket body 7, one end of the vent hole 2 is connected to the nozzle connecting socket head 1, and the other end is connected to the outside of the socket body 7. The two air vents 2 are provided, and one end of the air vent 2 which is away from the oil nozzle connecting sleeve head 1 is connected to the protective tube support 3; the protective tube support 3 is connected to the outer end of the sleeve barrel 7, and also includes a fixing pin hole 4, which passes through the sleeve barrel 7, the protective tube support 3 and the central protective tube 6 in sequence. When it is necessary to fix the internal through needle 11, a fixing pin is arranged in the fixing pin hole 4, and the end of the fixing pin abuts against the through needle 11, thereby further realizing the clamping and fixing of the through needle 11.

[0068] Example 9

[0069] The embodiment of the present invention discloses a nozzle socket wrench, comprising a socket body 7, wherein a center protective tube 6 and a nozzle connecting socket head 1 are axially opened in sequence inside the socket body 7, and the center protective tube 6 and the nozzle connecting socket head 1 are connected; the center protective tube 6 is used to place a pass needle 11, and the nozzle connecting socket head 1 is used to connect the nozzle; a limiting body is provided at the end of the pass needle 11, and when the pass needle 11 extends into the nozzle through the end of the center protective tube 6, the limiting body can be connected to the nozzle; a socket force arm rod 5 is provided at the port of the socket body 7.

[0070] The working principle of the embodiment of the present invention is as follows:

[0071] In the embodiment of the present invention, the nozzle connection sleeve head is an inner hexagonal structure. When the outer hexagon of the nozzle is meshed with the inner hexagon of the sleeve head, the pass needle is guided by the positioning of the sleeve center protective tube 6 to maintain concentricity with the sleeve cylinder 7 and the inner hole of the nozzle, and the pass needle 11 can smoothly enter the inner hole of the nozzle. At this time, the pass needle 11 plays a role in dredging the inner hole of the nozzle, and the gap between the pass needle 11 and the center protective tube 6 and the vent are used to release the residual pressure. The center protective tube 6 plays the role of the pass needle 11 entering the inner hole of the nozzle and the residual pressure release channel;

[0072] When entering, after the front end card of the needle 11 extends out of the oil nozzle hole, because the card has a 360° rotation and left-right asymmetric design, the needle 11 is gently shaken under the action of gravity, and the needle 11 produces a non-vertical angle displacement, and the card can smoothly enter the oil nozzle. When the card enters the oil nozzle, lift the needle 11 card to clamp the oil nozzle, tighten the fixture, turn the socket wrench counterclockwise, take out the oil nozzle, and ensure that the oil nozzle will not fall off.

[0073] The device disclosed by the present invention has a needle that quickly enters the inner hole of the oil nozzle to release pressure under the action of a guide tube, and uses a card and a fixer to form the oil nozzle and the socket wrench into a whole, thereby achieving rapid alignment and guiding the needle to enter the inner hole of the oil nozzle to release the residual pressure; the protective tube and the vent hole reduce the residual pressure release area and fix the release channel; the card fixes the oil nozzle and solves the problem of the oil nozzle falling off due to the influence of gravity; the harm of toxic and harmful substances to operators is reduced and eliminated, the working time is improved, and the purpose of safe production is achieved.

[0074] In the embodiment of the present invention, when applied to the disassembly or repair of a horizontally mounted oil nozzle, the end of the needle 11 may not be installed with a limiter. When applied to a vertically mounted oil nozzle, the end of the needle 11 may be installed with a limiter.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grease nozzle socket wrench, characterized in that: It comprises a sleeve body (7), wherein a central protective tube (6) and an oil nozzle connecting sleeve head (1) are sequentially provided axially inside the sleeve body (7), and the central protective tube (6) and the oil nozzle connecting sleeve head (1) are connected; The central protective tube (6) is used to place the pass needle (11), and the oil nozzle connecting sleeve head (1) is used to connect the oil nozzle; A limiting body is arranged at the end of the through needle (11), and when the through needle (11) extends into the oil nozzle through the central protective tube (6), the limiting body can be connected with the oil nozzle.

2. A grease nipple socket wrench according to claim 1, characterized in that: The limiting body comprises a card (10), and two ends of the card (10) protrude from the outer side wall of the needle (11); A through hole is provided on the through pin (11), and the card (10) passes through the through hole, and the card (10) can swing left and right along the through hole.

3. A grease nipple socket wrench according to claim 2, characterized in that: The card (10) is connected to the needle (11) via a fixing pin (9).

4. The grease nipple socket wrench according to claim 1, characterized in that: A limiting rod (8) is provided at one end of the needle (11) away from the limiting body, and the length of the limiting rod (8) is greater than the diameter of the central protective tube (6).

5. The grease nipple socket wrench according to claim 1, characterized in that: A vent hole (2) is also provided in the sleeve body (7), one end of the vent hole (2) is connected to the oil nozzle connecting sleeve head (1), and the other end is connected to the outside of the sleeve body (7).

6. The grease nipple socket wrench according to claim 5, characterized in that: The vent holes (2) are provided with two.

7. The grease nipple socket wrench according to claim 6, characterized in that: The two ventilation holes (2) are symmetrically opened along two sides of the central protective tube (6).

8. The grease nipple socket wrench according to claim 5, characterized in that: The vent hole (2) is connected to the protective tube support (3) at one end away from the oil nozzle connection sleeve head (1); The protective tube support (3) is in communication with the outer end of the sleeve body (7).

9. A grease nipple socket wrench according to claim 8, characterized in that: It also includes a fixing pin hole (4), which passes through the sleeve body (7), the protective tube support (3) and the central protective tube (6) in sequence.

10. The grease nipple socket wrench according to claim 1, characterized in that: A sleeve force arm rod (5) is provided at the end of the sleeve body (7).

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