Position sensing device for double-conical-surface drilling slip

Abstract

The utility model relates to the technical field of petroleum machinery, in particular to a position sensing device for a double-conical-surface drilling slip. The position sensing device comprises a transverse triggering ejector rod, a longitudinal triggering ejector rod and a signal valve body, and when the conical surface inlay is separated from the head end of the transverse triggering ejector rod, the transverse triggering ejector rod is located at the first position, the head end of the longitudinal triggering ejector rod is located in the driving groove, and the longitudinal triggering ejector rod is located at the initial position, the signal valve body is not subjected to pressure; when the conical surface inlay abuts against the head end of the transverse triggering ejector rod, the transverse triggering ejector rod slides to a second position, at the moment, the head end of the longitudinal triggering ejector rod abuts against the side wall of the transverse triggering ejector rod, and the longitudinal triggering ejector rod moves downwards to press the signal valve body. According to the signal valve, the transverse triggering ejector rod is matched with the longitudinal triggering ejector rod, so that the signal valve body with higher cost is stressed in the vertical direction, the stress of the signal valve is uniform, the service life of the signal valve is prolonged, shutdown maintenance during use is avoided, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum machinery, in particular to a position sensing device for double-cone drilling slips. Background Art

[0002] With the increasing efforts in oil exploration and development, higher requirements are placed on wellhead tools. At present, the main tool for holding pipes in the oil and gas industry is the slip device. Most of the existing gas and hydraulic slip devices are designed with a single cone surface, but the distance that the slip body moves up and down will be very large, affecting the use of other supporting equipment. Of course, there is also a double cone surface design in the slip device. The double cone surface design means that the inlay is designed with inclined surfaces on both sides, so that the inner side of the slip body that matches it is an inclined surface, and the inner side of the slip seat is an inclined surface.

[0003] In the existing double-conical slips, the position sensing structure is a signal valve, which is usually set horizontally. When the inlay moves down, the head of the signal valve is pressed, and when the inlay moves up, the head of the signal valve is released, and then the control device receives the signal to sense that the drill tool is clamped or loosened. However, since the inlay is a double-conical surface, the head of the horizontally set signal valve is subjected to oblique downward pressure, which makes the signal valve unevenly stressed and easy to be damaged. The shutdown for maintenance during use reduces work efficiency. At the same time, damage to the signal valve is prone to generate erroneous signals, leading to drilling accidents. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a position sensing device for double-cone drilling slips, which solves the technical problem that the signal valve is easily damaged.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] The utility model provides a position sensing device for double-cone drilling slips, which is arranged in the double-cone drilling slips. The double-cone drilling slips include a slip seat, a conical inlay and a slip body. The conical inlay is arranged between the slip seat and the slip body, and the two contact surfaces of the conical inlay are both conical surfaces. The position sensing device includes a transverse triggering push rod, a longitudinal triggering push rod and a signal valve body. The transverse triggering push rod can be horizontally arranged in the slip seat, and the head end of the transverse triggering push rod can be close to the conical surface of the conical inlay. A driving groove is provided on the peripheral wall of the transverse triggering push rod. The transverse triggering push rod can slide back and forth horizontally between a first position and a second position. The longitudinal triggering push rod can slide back and forth horizontally between a first position and a second position. The trigger push rod can be vertically arranged in the cava seat, the head end of the longitudinal trigger push rod can be vertically extended into the driving groove, and the tail end of the longitudinal trigger push rod is connected with the trigger part of the signal valve body; when the conical inlay is separated from the head end of the transverse trigger push rod, the transverse trigger push rod is located at the first position, the head end of the longitudinal trigger push rod is located in the driving groove, and the longitudinal trigger push rod is located at the initial position; when the conical inlay abuts against the head end of the transverse trigger push rod, the transverse trigger push rod slides to the second position, at which time the head end of the longitudinal trigger push rod abuts against the side wall of the transverse trigger push rod, the longitudinal trigger push rod is located in the working position, and the longitudinal trigger push rod moves downward to press the trigger part of the signal valve body.

[0009] Preferably, a transverse accommodating through hole is horizontally opened in the cava seat, and the transverse triggering push rod is located in the transverse accommodating through hole; the position sensing device also includes an elastic connection unit, and the elastic connection unit includes an abutment block and an elastic member arranged in the transverse accommodating through hole; the abutment block is fixed in the transverse accommodating through hole, the elastic member is horizontally oriented, one end of the elastic member is connected to the abutment block, and the other end of the elastic member is connected to the tail end of the transverse triggering push rod.

[0010] Preferably, the elastic member is a spring; a positioning hole is horizontally provided in the middle of the abutment block, and the tail end of the transverse trigger push rod is inserted into the positioning hole of the abutment block; an external thread is provided on the outside of the abutment block, and an internal thread is provided in the transverse accommodating through hole at a position opposite to the abutment block, and the abutment block is threadedly connected to the transverse accommodating through hole; an abutment portion extends outwardly in the circumferential direction of the transverse trigger push rod, the spring is sleeved on the transverse trigger push rod, and one end of the spring abuts against the end of the abutment block, and the other end of the spring abuts against the abutment portion of the transverse trigger push rod.

[0011] Preferably, it also includes at least one copper sleeve; the copper sleeve is fixed in the transverse accommodating through hole and is sleeved on the transverse triggering push rod and is slidably connected to the transverse triggering push rod.

[0012] Preferably, a lubricating oil channel is provided in the transverse trigger push rod; an outlet of the lubricating oil channel is opposite to the inner wall of the copper sleeve to provide lubricating oil between the copper sleeve and the transverse trigger push rod.

[0013] Preferably, the lubricating oil channel includes a transverse branch and at least one longitudinal branch; the longitudinal branch is connected to the transverse branch, and the outlet of the longitudinal branch is opposite to the inner wall of the copper sleeve to provide lubricating oil between the copper sleeve and the transverse trigger push rod.

[0014] Preferably, the transverse trigger push rod and the longitudinal trigger push rod are both made of stainless steel.

[0015] Preferably, the driving groove is an annular groove formed on the peripheral wall of the transverse trigger push rod; the cross section of the annular groove is an arc shape.

[0016] Preferably, it also includes a mounting block, which is fixed on the cava seat; a vertically oriented mounting hole is opened in the mounting block; the tail end of the longitudinal trigger push rod is located in the mounting hole, the signal valve body is connected to the bottom of the mounting block and the trigger part of the signal valve body extends into the mounting hole and is opposite to the tail end of the longitudinal trigger push rod.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the utility model are:

[0019] The utility model discloses a position sensing device for double-cone drilling slips. Since the position sensing device includes a transverse triggering push rod, a longitudinal triggering push rod and a signal valve body, when the conical inlay is in a state of loosening the drill pipe, the conical inlay is separated from the head end of the transverse triggering push rod, the transverse triggering push rod is located in the first position, the head end of the longitudinal triggering push rod is located in the driving groove, the longitudinal triggering push rod is located in the initial position, and the signal valve body is not subjected to pressure; when the conical inlay is in a state of clamping the drill pipe, the conical inlay abuts the head end of the transverse triggering push rod, and the transverse triggering push rod slides to the second position. At this time, the head end of the longitudinal triggering push rod abuts the side wall of the transverse triggering push rod, and the longitudinal triggering push rod moves downward to press the signal valve body. In the utility model, through the cooperation of the transverse triggering push rod and the longitudinal triggering push rod, the signal valve body with a higher cost is subjected to a vertical force, so that the signal valve is subjected to a uniform force, the service life of the signal valve is increased, and the shutdown for maintenance during use is avoided to improve the work efficiency, and at the same time, the problem of the signal valve being damaged and generating an erroneous signal leading to a drilling accident is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a longitudinal cross-sectional schematic diagram of the double-conical drilling slip of the utility model;

[0021] Figure 2 for Figure 1 An enlarged view of part A in FIG. 1 (where the conical inlay abuts against the head end of the lateral trigger push rod);

[0022] Figure 3 is a schematic cross-sectional view of the position sensing device (where the conical inlay is separated from the head end of the lateral trigger push rod);

[0023] Figure 4 is a schematic diagram of the structure of a position sensing device;

[0024] Figure 5 for Figure 4 Schematic diagram of the longitudinal section.

[0025] [Description of Reference Numerals]

[0026] 1: Slip seat; 11: lateral receiving through hole;

[0027] 2: Conical inlay;

[0028] 3: Slip body;

[0029] 4: position sensing device; 41: transverse trigger push rod; 411: driving groove; 412: lubricating oil channel; 4121: transverse branch; 4122: longitudinal branch; 42: longitudinal trigger push rod; 43: signal valve body; 44: elastic connection unit; 441: abutment block; 442: elastic member; 45: copper sleeve; 46: mounting block; 461: mounting hole. DETAILED DESCRIPTION

[0030] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0031] like Figure 1 As shown, this embodiment provides a position sensing device for a double-conical drilling cava, wherein a position sensing device 4 is disposed in the double-conical drilling cava, and the double-conical drilling cava comprises a cava seat 1, a conical inlay 2 and a cava body 3, wherein the conical inlay 2 is disposed between the cava seat 1 and the cava body 3 and both contact surfaces of the conical inlay 2 are conical surfaces.

[0032] The position sensing device 4 includes a transverse triggering push rod 41, a longitudinal triggering push rod 42 and a signal valve body 43. A transverse accommodating through hole 11 is horizontally opened in the cava seat 1. The transverse triggering push rod 41 is located in the transverse accommodating through hole 11, that is, the transverse triggering push rod 41 can be horizontally arranged in the cava seat 1, and the head end of the transverse triggering push rod 41 can be close to the conical surface of the conical inlay 2. A driving groove 411 is provided on the surrounding wall of the transverse triggering push rod 41, wherein the transverse triggering push rod 41 can slide back and forth horizontally between a first position and a second position, and the longitudinal triggering push rod 42 can be vertically arranged in the cava seat 1, and the head end of the longitudinal triggering push rod 42 can vertically extend into the driving groove 411, and the tail end of the longitudinal triggering push rod 42 is connected to the triggering part of the signal valve body 43.

[0033] like Figure 3 As shown, when the conical inlay 2 is separated from the head end of the transverse trigger push rod 41, the transverse trigger push rod 41 is located at the first position, the head end of the longitudinal trigger push rod 42 is located in the driving groove 411, and the longitudinal trigger push rod 42 is located at the initial position. Figure 2 As shown, when the conical inlay 2 abuts against the head end of the transverse trigger push rod 41, the transverse trigger push rod 41 slides to the second position, at which time the head end of the longitudinal trigger push rod 42 abuts against the side wall of the transverse trigger push rod 41, the longitudinal trigger push rod 42 is in the working position, and the longitudinal trigger push rod 42 moves downward to press the triggering part of the signal valve body 43. To avoid the transverse trigger push rod 41 from getting stuck when sliding horizontally, the driving groove 411 is an annular groove formed on the peripheral wall of the transverse trigger push rod 41, and the cross section of the annular groove is an arc shape. To improve the strength of the transverse trigger push rod 41 and the longitudinal trigger push rod 42, the transverse trigger push rod 41 and the longitudinal trigger push rod 42 are both made of stainless steel.

[0034] To facilitate the installation of the longitudinal trigger push rod 42 and the signal valve body 43, the position sensing device 4 also includes a mounting block 46, which is fixed on the cava seat 1. A vertically oriented mounting hole 461 is provided in the mounting block 46. The tail end of the longitudinal trigger push rod 42 is located in the mounting hole 461. The signal valve body 43 is connected to the bottom of the mounting block 46 and the triggering part of the signal valve body 43 extends into the mounting hole 461 and is opposite to the tail end of the longitudinal trigger push rod 42.

[0035] In this embodiment, through the cooperation of the transverse trigger push rod 41 and the longitudinal trigger push rod 42, the more expensive signal valve body 43 is subjected to vertical force, so that the signal valve is evenly stressed, the service life of the signal valve is increased, and shutdown for maintenance during use is avoided, which improves work efficiency and avoids the problem of damage to the signal valve generating erroneous signals leading to drilling accidents.

[0036] like Figure 4 and Figure 5 As shown, the position sensing device 4 further includes an elastic connection unit 44, which includes an abutment block 441 and an elastic member 442 disposed in the transverse accommodation through hole 11, wherein the abutment block 441 is fixed in the transverse accommodation through hole 11, and the elastic member 442 is horizontally oriented, one end of the elastic member 442 is connected to the abutment block 441, and the other end of the elastic member 442 is connected to the tail end of the transverse triggering push rod 41. In this embodiment, the elastic member 442 is a spring, and the abutment block 441 is a rotating body structure.

[0037] A positioning hole is horizontally provided in the middle of the abutment block 441, and the tail end of the transverse trigger push rod 41 is inserted into the positioning hole of the abutment block 441. To facilitate the installation and fixation of the abutment block 441, an external thread is provided on the outside of the abutment block 441, and an internal thread is provided in the transverse receiving through hole 11 at a position corresponding to the abutment block 441, and the abutment block 441 is threadedly connected with the transverse receiving through hole 11. To achieve the connection of the spring, an abutment portion is extended outwardly in the circumferential direction of the transverse trigger push rod 41, and the spring is sleeved on the transverse trigger push rod 41, and one end of the spring abuts against the end of the abutment block 441, and the other end of the spring abuts against the abutment portion of the transverse trigger push rod 41.

[0038] like Figure 5 As shown, in order to improve the wear resistance of the slip seat 1, the position sensing device 4 also includes at least one copper sleeve 45, wherein the copper sleeve 45 is fixed in the transverse accommodation through hole 11 and is sleeved on the transverse triggering push rod 41 and is slidably connected to the transverse triggering push rod 41. In order to further avoid the friction between the slip seat 1 and the transverse triggering push rod 41, a lubricating oil channel 412 is opened in the transverse triggering push rod 41, wherein the lubricating oil channel 412 includes a transverse branch 4121 and two longitudinal branches 4122, the longitudinal branch 4122 is connected to the transverse branch 4121, and the outlet of the longitudinal branch 4122 is opposite to the inner wall of the copper sleeve 45, so as to provide lubricating oil between the copper sleeve 45 and the transverse triggering push rod 41.

[0039] It should be noted that, in this embodiment, the signal valve body 43 is a prior art, and its specific structure and signal sensing principle are not described in detail herein.

[0040] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. 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] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A position sensing device for a double-conical drilling slip, arranged in a double-conical drilling slip, the double-conical drilling slip comprising a slip seat, a conical inlay and a slip body, the conical inlay being arranged between the slip seat and the slip body and the two contact surfaces of the conical inlay being both conical surfaces, characterized in that: The position sensing device comprises a transverse triggering push rod, a longitudinal triggering push rod and a signal valve body; the transverse triggering push rod can be horizontally arranged in the slip seat, the head end of the transverse triggering push rod can be close to the conical surface of the conical surface inlay, and a driving groove is arranged on the peripheral wall of the transverse triggering push rod; The transverse trigger push rod can slide back and forth horizontally between a first position and a second position; The longitudinal trigger push rod can be vertically arranged in the slip seat, the head end of the longitudinal trigger push rod can vertically extend into the driving groove, and the tail end of the longitudinal trigger push rod is connected to the trigger part of the signal valve body; When the conical inlay is separated from the head end of the transverse triggering push rod, the transverse triggering push rod is located at the first position, the head end of the longitudinal triggering push rod is located in the driving groove, and the longitudinal triggering push rod is located at the initial position; when the conical inlay abuts against the head end of the transverse triggering push rod, the transverse triggering push rod slides to the second position, at which time the head end of the longitudinal triggering push rod abuts against the side wall of the transverse triggering push rod, the longitudinal triggering push rod is located at the working position, and the longitudinal triggering push rod moves downward to press the triggering part of the signal valve body.

2. The position sensing device for double-conical drilling slips according to claim 1, characterized in that: A transverse accommodating through hole is horizontally provided in the slip seat, and the transverse triggering push rod is located in the transverse accommodating through hole; The position sensing device further comprises an elastic connection unit, wherein the elastic connection unit comprises an abutment block and an elastic member disposed in the transverse accommodation through hole; The abutment block is fixed in the transverse accommodating through hole, the elastic member is horizontally oriented, one end of the elastic member is connected to the abutment block, and the other end of the elastic member is connected to the tail end of the transverse triggering push rod.

3. The position sensing device for double-conical drilling slips according to claim 2, characterized in that: The elastic member is a spring; A positioning hole is horizontally provided in the middle of the abutment block, and the tail end of the horizontal trigger push rod is inserted into the positioning hole of the abutment block; The abutment block is provided with an external thread on the outside, and the transverse accommodation through hole is provided with an internal thread at a position opposite to the abutment block, and the abutment block is threadedly connected with the transverse accommodation through hole; An abutment portion extends outwardly in the circumferential direction of the transverse trigger push rod, the spring is sleeved on the transverse trigger push rod, and one end of the spring abuts against the end of the abutment block, and the other end of the spring abuts against the abutment portion of the transverse trigger push rod.

4. The position sensing device for double-conical drilling slips according to claim 2, characterized in that: Also includes at least one copper sleeve; The copper sleeve is fixed in the transverse accommodating through hole and sleeved on the transverse triggering push rod to be slidably connected with the transverse triggering push rod.

5. The position sensing device for double-conical drilling slips according to claim 4, characterized in that: A lubricating oil channel is provided in the transverse trigger push rod; The outlet of the lubricating oil passage is opposite to the inner wall of the copper sleeve to provide lubricating oil between the copper sleeve and the transverse triggering push rod.

6. The position sensing device for double-cone drilling slips according to claim 5, characterized in that: The lubricating oil passage comprises a transverse branch and at least one longitudinal branch; The longitudinal branch is communicated with the transverse branch, and an outlet of the longitudinal branch is opposite to the inner wall of the copper sleeve, so as to provide lubricating oil between the copper sleeve and the transverse trigger push rod.

7. The position sensing device for double-cone drilling slips according to claim 1, characterized in that: The transverse trigger push rod and the longitudinal trigger push rod are both made of stainless steel.

8. The position sensing device for double-cone drilling slips according to claim 1, characterized in that: The driving groove is an annular groove formed on the peripheral wall of the transverse triggering push rod; The cross section of the annular groove is in the shape of an arc.

9. The position sensing device for double-cone drilling slips according to claim 1, characterized in that: Also includes a mounting block, the mounting block is fixed on the slip seat; A vertically oriented mounting hole is provided in the mounting block; The tail end of the longitudinal trigger push rod is located in the mounting hole, the signal valve body is connected to the bottom of the mounting block, and the triggering part of the signal valve body extends into the mounting hole and is opposite to the tail end of the longitudinal trigger push rod.

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