Flip cover for well drilling slip

Abstract

The utility model relates to the technical field of petroleum machinery, in particular to a turning cover for a well drilling slip. Due to the fact that the overturning unit comprises the overturning block and the oil duct pin, part of the oil duct is arranged in the overturning block, pipeline arrangement is reduced, meanwhile, outlets of the third oil duct and the fourth oil duct on the oil duct pin are communicated with two oil ways of the centralizing oil cylinder on the cover body through the first pipeline and the second pipeline respectively, and the oil duct pin is fixed relative to the hinged end of the cover body. The centralizing oil cylinder is arranged on the cover body, and when the cover body is overturned, the first pipeline and the second pipeline are fixed relative to the cover body, so that the problem of pipeline damage caused by interference between the cover body and the pipelines when the cover body is opened and closed is avoided, and the development progress of oil exploration is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum machinery, in particular to a flip cover for drilling slips. Background Art

[0002] With the increasing efforts in oil exploration and development, higher requirements are placed on wellhead tools. At present, the tools for holding pipes in the oil and gas industry are mainly slip devices. During the operation of slip devices, especially when they are closed, they often face the problem of pipes deviating from the center of the wellhead; however, this problem will cause the power slips to fail to clamp the pipes correctly and reliably.

[0003] In the prior art, a straightening mechanism is usually arranged on the cover plate to straighten the pipe first so that the axis of the pipe is located at the center of the clamping of the slip device. The straightening mechanism is mostly driven by a hydraulic cylinder for straightening. However, when the slip device is not working, the cover plate is in an open state. When in use, the cover plate needs to be lowered. When opening and closing, the cover plate is easy to interfere with the pipeline of the hydraulic cylinder in the straightening mechanism, damaging the pipeline, and then the pipeline needs to be replaced, which affects the progress of oil exploration and development. 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 flip cover for drilling slips, which solves the technical problem of interference between the cover plate and the pipeline when opening and closing the cover plate.

[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 embodiment provides a flap for drilling cava, comprising two flap assemblies arranged at the top of the cava body, the two flap assemblies each comprising a cover body, a straightening unit and a straightening cylinder arranged on the cover body, the flap assembly also comprising a flip unit; the flip unit comprises a flip block fixed above the cava body, and an oil channel pin hinged to the flip block, the hinged end of the cover body is sleeved and fixed on the oil channel pin; a first oil channel and a second oil channel are opened in the flip block, a third oil channel and a fourth oil channel are opened on the oil channel pin, the inlets of the first oil channel and the second oil channel are used to communicate with the oil pump, the outlets of the first oil channel and the second oil channel are respectively connected to the inlets of the third oil channel and the fourth oil channel, the outlets of the third oil channel and the fourth oil channel are respectively connected to the two oil channels of the straightening cylinder through the first pipeline and the second pipeline to supply oil to drive the straightening cylinder to drive the straightening unit to rotate and open and close.

[0009] Preferably, the oil channel pins are two hinge pins, and the third oil channel and the fourth oil channel are respectively arranged on the two hinge pins; the hinged end of the cover body is provided with two hinge ears, and the two hinge ears are respectively arranged at the two ends of the flip block and are hinged to the flip block through the hinge pin; the two hinge ears are provided with a first connecting oil channel and a second connecting oil channel, the outlet of the third oil channel is connected to the first pipeline through the first connecting oil channel, and the outlet of the fourth oil channel is connected to the second pipeline through the second connecting oil channel; the outlets of the first connecting oil channel and the second connecting oil channel are toward one side of the straightening cylinder.

[0010] Preferably, the straightening unit comprises a rotating disk of a semicircular ring structure and a straightening bushing; the straightening bushing is detachably connected to the inner wall of the rotating disk; one end of the rotating disk is hinged to the cover body, and the other end of the rotating disk is hinged to the telescopic end of the straightening cylinder.

[0011] Preferably, the rotating disk and the centralizing bushing are clamped together by an annular clamping piece; the inner wall of the clamping piece protrudes inwardly and is clamped into the outer wall clamping groove of the centralizing bushing; the outer wall of the clamping piece protrudes outwardly and is clamped into the inner wall clamping groove of the rotating disk.

[0012] Preferably, the straightening unit further comprises a locking pin; the locking pin radially passes through the rotating disk and is locked with the clamping member.

[0013] Preferably, the two flap assemblies are mirror-symmetrically arranged at the top of the cava body; a first hinge block is provided at one end of the circumferential outer wall of the rotating disk, and a second hinge block is provided on the cover body; an opening groove is provided laterally on the second hinge block, the first hinge block extends into the opening groove of the second hinge block and is hinged to the second hinge block through the first pin shaft; a connecting block is provided at the other end of the circumferential outer wall of the rotating disk; an opening groove is provided laterally on the connecting block, the telescopic end of the straightening cylinder extends into the opening groove of the connecting block and is hinged to the telescopic end of the straightening cylinder through the second pin shaft.

[0014] Preferably, a first guide block is provided on the circumferential outer wall of the rotating disk, and a second guide block is provided on the cover body; the second guide block is provided with an open groove in the transverse direction, the first guide block extends into the open groove of the second guide block, and the first guide block is slidably connected to the second guide block.

[0015] Preferably, the cover body is provided with a third guide block, the third guide block is laterally provided with an open groove, and the connecting block extends into the open groove of the third guide block and is slidably connected with the third guide block.

[0016] Preferably, lubricating oil nozzles are provided on the second guide block and the third guide block to provide lubricating oil between the second guide block and the first guide block, and between the third guide block and the connecting block, respectively.

[0017] The utility model also includes a drilling slip, including the above-mentioned flap, a slip body and an oil pump; the two flap components of the flap are mirror-symmetrically arranged at the top of the slip body; the oil pump is arranged on the slip body to supply oil to the first oil channel and the second oil channel.

[0018] (III) Beneficial effects

[0019] The beneficial effects of the utility model are:

[0020] The utility model discloses a flip cover for drilling slips. The flip unit includes a flip block and an oil channel pin. The flip block has a part of the oil channel built in, thereby reducing the arrangement of pipelines. Meanwhile, the outlets of the third oil channel and the fourth oil channel on the oil channel pin are respectively connected with the two oil channels of the righting oil cylinder on the cover body through the first pipeline and the second pipeline. Since the hinged ends of the oil channel pin and the cover body are relatively fixed, and the righting oil cylinder is arranged on the cover body, when the cover body is flipped, the first pipeline and the second pipeline are fixed relative to the cover body. Therefore, the problem of interference between the cover body and the pipeline and damage to the pipeline when the cover body is opened and closed is avoided, thereby shortening the development progress of oil exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the drilling slips of the utility model;

[0022] Figure 2 is a schematic diagram of a transverse cross section of the flip cover;

[0023] Figure 3 for Figure 1 A magnified schematic diagram of part A;

[0024] Figure 4 is a longitudinal cross-sectional schematic diagram of the flip unit;

[0025] Figure 5 is a longitudinal cross-sectional schematic diagram of the flip cover assembly;

[0026] Figure 6 It is a schematic diagram of the structure of the rotating disk.

[0027] [Description of Reference Numerals]

[0028] 1: flip cover assembly; 11: cover body; 111: second hinge block; 112: second guide block; 113: third guide block; 114: connecting piece; 12: straightening unit; 121: rotating disk; 1211: first hinge block; 1212: first guide block; 1213: connecting block; 122: straightening bushing; 123: clamping piece; 124: locking pin; 13: straightening cylinder; 14: flip unit; 141: flip block; 142: oil channel pin; 151: first oil channel; 152: second oil channel; 153: third oil channel; 154: fourth oil channel; 155: first connecting oil channel; 156: second connecting oil channel; 157: first pipeline; 158: second pipeline;

[0029] 2: Kava body;

[0030] 3: Oil pump. DETAILED DESCRIPTION

[0031] 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.

[0032] Embodiment 1

[0033] like Figure 1-Figure 3 As shown, this embodiment provides a flap for drilling slips, which includes two flap assemblies 1, which are mirror-symmetrically arranged at the top of the slip body 2. The two flap assemblies 1 each include a semicircular cover body 11, a flip unit 14, a straightening unit 12 and a straightening cylinder 13 arranged on the cover body 11, one end of the straightening unit 12 is hinged to the cover body 11, and the other end is connected to the telescopic end of the straightening cylinder 13, and the fixed end of the straightening cylinder 13 is hinged to the cover body 11.

[0034] The flip unit 14 includes a flip block 141 fixed above the slip body 2, and an oil gallery pin 142 hinged to the flip block 141, and the hinged end of the cover 11 is sleeved and fixed on the oil gallery pin 142. Figure 4 As shown, a first oil passage 151 and a second oil passage 152 are provided in the flip block 141, and a third oil passage 153 and a fourth oil passage 154 are provided on the oil passage pin 142. The inlets of the first oil passage 151 and the second oil passage 152 are used to communicate with the oil pump 3, and the outlets of the first oil passage 151 and the second oil passage 152 are respectively communicated with the inlets of the third oil passage 153 and the fourth oil passage 154, and the outlets of the third oil passage 153 and the fourth oil passage 154 are respectively connected with the two oil passages of the straightening cylinder 13 through the first pipeline 157 and the second pipeline 158 to supply oil to drive the straightening cylinder 13 to drive the straightening unit 12 to rotate and open and close so as to straighten the pipes in the drilling slip.

[0035] Since the flip block 141 has some oil channels built in, the pipeline setting is reduced. At the same time, the outlets of the third oil channel 153 and the fourth oil channel 154 on the oil channel pin 142 are connected to the two oil channels of the straightening cylinder 13 on the cover body 11 through the first pipeline 157 and the second pipeline 158 respectively. Since the hinged end of the oil channel pin 142 and the cover body 11 is relatively fixed, and the straightening cylinder 13 is arranged on the cover body 11, when the cover body 11 is flipped, the first pipeline 157 and the second pipeline 158 are fixed relative to the cover body 11. Therefore, the problem of interference between the cover body 11 and the pipeline and damage to the pipeline when the cover body 11 is opened and closed is avoided, thereby shortening the development progress of oil exploration.

[0036] In actual application, the oil channel pin 142 can be an integrated structure. Of course, for the convenience of installation in this embodiment, the oil channel pin 142 is two hinge pins, and the third oil channel 153 and the fourth oil channel 154 are respectively arranged on the two hinge pins. The hinge end of the cover body 11 is provided with two hinge ears, and the two hinge ears are respectively arranged at the two ends of the flip block 141 and are hinged to the flip block 141 through the hinge pin. In order to make the lines of the first pipeline 157 and the second pipeline 158 shorter, the two hinge ears are provided with a first connecting oil channel 155 and a second connecting oil channel 156. The outlet of the third oil channel 153 is connected to the first pipeline 157 through the first connecting oil channel 155, and the outlet of the fourth oil channel 154 is connected to the second pipeline 158 through the second connecting oil channel 156. The outlets of the first connecting oil channel 155 and the second connecting oil channel 156 face one side of the straightening oil cylinder 13.

[0037] like Figure 2 and Figure 5 As shown, the straightening unit 12 comprises a rotating disk 121 of a semicircular ring structure and a straightening bushing 122. The straightening bushing 122 is detachably connected to the inner wall of the rotating disk 121. One end of the rotating disk 121 is hinged to the cover body 11, and the other end of the rotating disk 121 is hinged to the telescopic end of the straightening cylinder 13. In order to facilitate the adaptation to pipes of different diameters and the replacement of the straightening bushing 122, the rotating disk 121 and the straightening bushing 122 are connected by an annular clamping member 123. The inner wall of the clamping member 123 protrudes inwardly and is clamped into the outer wall clamping groove of the straightening bushing 122. The outer wall of the clamping member 123 protrudes outwardly and is clamped into the inner wall clamping groove of the rotating disk 121. In order to improve the connection effect of the clamping member 123 and improve the locking reliability, the straightening unit 12 also includes a locking pin 124. The locking pin 124 radially passes through the rotating disk 121 and is connected to the clamping member 123 to lock the rotating disk 121 and the clamping member 123 through a longitudinal pin.

[0038] like Figure 6As shown, in order to realize the opening and closing of the rotating disk 121, a first hinge block 1211 is provided at one end of the circumferential outer wall of the rotating disk 121, and a second hinge block 111 is provided on the cover body 11. The second hinge block 111 is laterally provided with an open groove, the first hinge block 1211 extends into the open groove of the second hinge block 111 and is hinged to the second hinge block 111 through a first pin shaft, and a connecting block 1213 is provided on the other end of the circumferential outer wall of the rotating disk 121. The connecting block 1213 is laterally provided with an open groove, and the telescopic end of the straightening cylinder 13 extends into the open groove of the connecting block 1213 and is hinged to the telescopic end of the straightening cylinder 13 through a second pin shaft.

[0039] In order to make the rotating disk 121 more stable when opening and closing, a first guide block 1212 is further provided on the circumferential outer wall of the rotating disk 121, and a second guide block 112 is provided on the cover body 11. The second guide block 112 is laterally provided with an open groove, and the first guide block 1212 extends into the open groove of the second guide block 112, and the first guide block 1212 is slidably connected to the second guide block 112.

[0040] In order to adapt to the rotation of the rotating disk 121 when the righting cylinder 13 is extended and retracted, a connecting piece 114 is provided on the cover body 11, and an open slot is provided in the transverse direction of the connecting piece 114. The fixed end of the righting cylinder 13 extends into the open slot of the connecting piece 114 and is rotatably connected via a pin. In order to make the righting cylinder 13 more stable when driven, a third guide block 113 is provided on the cover body 11, and an open slot is provided in the transverse direction of the third guide block 113. The connecting block 1213 extends into the open slot of the third guide block 113 and is slidably connected to the third guide block 113.

[0041] Lubricating oil nozzles are provided on the second guide block 112 and the third guide block 113 to provide lubricating oil between the second guide block 112 and the first guide block 1212 and between the third guide block 113 and the connecting block 1213 respectively, so as to reduce friction during sliding.

[0042] Embodiment 2

[0043] The present embodiment provides a drilling cava, including the flap in the first embodiment, and also including a cava body 2 and an oil pump 3, wherein the two flap components 1 of the flap are arranged in a mirror-symmetrical manner at the top of the cava body 2, and the oil pump 3 is arranged on the cava body 2 to supply oil to the first oil channel 151 and the second oil channel 152.

[0044] Since the flip block 141 in the flip cover has some oil channels built in, the pipeline setting is reduced. At the same time, the outlets of the third oil channel 153 and the fourth oil channel 154 on the oil channel pin 142 are connected to the two oil channels of the straightening cylinder 13 on the cover body 11 through the first pipeline 157 and the second pipeline 158 respectively. Since the hinged end of the oil channel pin 142 and the cover body 11 is relatively fixed, and the straightening cylinder 13 is arranged on the cover body 11, when the cover body 11 is flipped, the first pipeline 157 and the second pipeline 158 are fixed relative to the cover body 11. Therefore, the technical problem of interference between the cover body 11 and the pipeline when the cover body 11 is opened and closed is avoided, thereby shortening the development progress of oil exploration.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 flap for drilling slips, comprising two flap assemblies (1) arranged at the top of a slip body (2), the two flap assemblies (1) each comprising a cover body (11), a straightening unit (12) and a straightening cylinder (13) arranged on the cover body (11), characterized in that: The flip cover assembly (1) further comprises a flip unit (14); The flip unit (14) comprises a flip block (141) fixed above the slip body (2), and an oil gallery pin (142) hinged to the flip block (141), and the hinged end of the cover body (11) is sleeved and fixed on the oil gallery pin (142); A first oil passage (151) and a second oil passage (152) are provided in the flip block (141); a third oil passage (153) and a fourth oil passage (154) are provided on the oil passage pin (142); the inlets of the first oil passage (151) and the second oil passage (152) are used to communicate with the oil pump (3); the outlets of the first oil passage (151) and the second oil passage (152) are respectively communicated with the inlets of the third oil passage (153) and the fourth oil passage (154); the outlets of the third oil passage (153) and the fourth oil passage (154) are respectively communicated with the two oil passages of the straightening oil cylinder (13) through a first pipeline (157) and a second pipeline (158) to supply oil to drive the straightening oil cylinder (13) and drive the straightening unit (12) to rotate and open.

2. The flip cover for drilling slips according to claim 1, characterized in that: The oil passage pins (142) are two hinge pins, and the third oil passage (153) and the fourth oil passage (154) are respectively arranged on the two hinge pins; The hinged end of the cover body (11) is provided with two hinged ears, and the two hinged ears are respectively arranged at two ends of the flip block (141) and are hinged to the flip block (141) through the hinge pin; A first connecting oil passage (155) and a second connecting oil passage (156) are provided on the two hinge ears; the outlet of the third oil passage (153) is connected to the first pipeline (157) through the first connecting oil passage (155); and the outlet of the fourth oil passage (154) is connected to the second pipeline (158) through the second connecting oil passage (156); The outlets of the first connecting oil passage (155) and the second connecting oil passage (156) face one side of the straightening oil cylinder (13).

3. The flip cover for drilling slips according to claim 1, characterized in that: The straightening unit (12) comprises a rotating disk (121) of a semi-circular ring structure and a straightening bushing (122); The straightening bushing (122) is detachably connected to the inner wall of the rotating disk (121); One end of the rotating disk (121) is hinged to the cover body (11), and the other end of the rotating disk (121) is hinged to the telescopic end of the straightening cylinder (13).

4. The flip cover for drilling slips as claimed in claim 3, characterized in that: The rotating disk (121) and the straightening bushing (122) are clamped together via an annular clamping piece (123); The inner wall of the clamping member (123) protrudes inwards and is clamped into a clamping groove on the outer wall of the straightening bushing (122); The outer wall of the clamping member (123) protrudes outwards and is clamped into a clamping groove on the inner wall of the rotating disk (121).

5. The flip cover for drilling slips according to claim 4, characterized in that: The straightening unit (12) further comprises a locking pin (124); The locking pin (124) radially passes through the rotating disk (121) and is locked with the clamping member (123).

6. The flip cover for drilling slips according to claim 5, characterized in that: The two flap assemblies (1) are arranged at the top of the slip body (2) in a mirror-symmetrical manner; A first hinge block (1211) is provided at one end of the circumferential outer wall of the rotating disk (121), and a second hinge block (111) is provided on the cover body (11); The second hinge block (111) is provided with an open slot in the transverse direction, and the first hinge block (1211) extends into the open slot of the second hinge block (111) and is hinged to the second hinge block (111) via a first pin shaft; A connecting block (1213) is provided on the other end of the circumferential outer wall of the rotating disk (121); The connecting block (1213) is laterally provided with an open groove, and the telescopic end of the straightening oil cylinder (13) extends into the open groove of the connecting block (1213) and is hinged to the telescopic end of the straightening oil cylinder (13) via a second pin shaft.

7. The flip cover for drilling slips according to claim 6, characterized in that: A first guide block (1212) is also provided on the circumferential outer wall of the rotating disk (121), and a second guide block (112) is provided on the cover body (11); The second guide block (112) is laterally provided with an open groove, the first guide block (1212) extends into the open groove of the second guide block (112), and the first guide block (1212) is slidably connected to the second guide block (112).

8. The flip cover for drilling slips according to claim 7, characterized in that: The cover body (11) is provided with a third guide block (113), and an open groove is provided in the transverse direction of the third guide block (113). The connecting block (1213) extends into the open groove of the third guide block (113) and is slidably connected with the third guide block (113).

9. The flip cover for drilling slips according to claim 8, characterized in that: Lubricating oil nozzles are provided on the second guide block (112) and the third guide block (113) to respectively provide lubricating oil between the second guide block (112) and the first guide block (1212), and between the third guide block (113) and the connecting block (1213).

10. A drilling slip, characterized in that: The flip cover comprises the flip cover according to any one of claims 1 to 9, and further comprises a slip body (2) and an oil pump (3); The two flap components (1) of the flap are arranged at the top of the slip body (2) in a mirror-symmetrical manner; The oil pump (3) is arranged on the slip body (2) to supply oil to the first oil passage (151) and the second oil passage (152).

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