Petroleum drilling wellhead automatic flow collecting device

Abstract

The utility model belongs to the technical field of petroleum drilling equipment and equipment cleaning, and particularly relates to an automatic flow collecting device for a petroleum drilling wellhead. The device comprises umbrella cloth, a fixed flange, an opening and closing connecting rod mechanism and a wellhead guide pipe, the center of the umbrella cloth is connected to a top end pipe opening of the wellhead guide pipe through a fixing flange. The lower end of the opening and closing connecting rod mechanism is connected to the well mouth guide pipe in an up-down sliding mode, and the upper end of the opening and closing connecting rod mechanism is connected to the periphery of the umbrella cloth and the fixing flange. And the lower end of the wellhead conduit is connected with a blowout preventer flange capable of relatively rotating. According to the utility model, only one person is needed to fold and unfold the well mouth mud guard umbrella, and the installation of the well mouth mud guard umbrella which needs to be completed in four hours originally is saved to be completed in one hour. The hoisting point is reasonable in arrangement, the weight is light, and the installation risk of multi-person combined operation is reduced. According to the utility model, manual operation is not needed during electric lifting; when a large well group works, only the soft mud blocking umbrella needs to be shrunk, the angle of the outlet pipe needs to be adjusted, and disassembly is not needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling equipment and equipment cleaning, and specifically relates to an automatic flow collecting device at an oil drilling wellhead. Background Art

[0002] During drilling, mud on the rig floor will flow down, contaminating the well plug and wellhead, and causing waste of mud. At present, iron tray-type mud guard umbrellas are commonly used on drilling sites to solve the above technical problems. However, due to the material limitations, the mud guard umbrella not only has a relatively small mud guarding area, but is also inconvenient to transport, and the suspension point is unbalanced during installation, which brings great safety hazards to on-site operations.

[0003] It is necessary to develop a mud retaining device which is easy to install and can meet the needs of on-site use. Utility Model Content

[0004] The utility model provides an automatic flow collecting device for an oil drilling wellhead. One of its purposes is to provide a device that can overcome the problems of poor mud blocking effect and high installation risk of traditional wellhead mud guard umbrellas; the second purpose is to provide a flow collecting device that can be quickly and automatically installed.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An automatic flow collecting device for a wellhead of a petroleum drilling well comprises an umbrella cloth, a fixed flange, an opening and closing connecting rod mechanism and a wellhead conduit; the center of the umbrella cloth is connected to the top pipe opening of the wellhead conduit through the fixed flange; the opening and closing connecting rod mechanism is used to control the opening and closing of the umbrella cloth, the lower end of the opening and closing connecting rod mechanism is connected to the wellhead conduit through the opening and closing connecting rod mechanism so as to be able to slide up and down, the upper end of the opening and closing connecting rod mechanism is respectively connected to the outer periphery of the umbrella cloth and the fixed flange so as to control the opening and closing of the umbrella cloth; the lower end of the wellhead conduit is connected to a well sealing device flange which can rotate relatively.

[0007] The umbrella cloth is a multi-layer structure made of soft polymer material.

[0008] The multi-layer structure includes a hydrophobic layer, a fiber support layer and a PVC layer; the hydrophobic layer, the fiber support layer and the PVC layer are arranged in order from top to bottom and are heat-sealed to form an integrated structure; the hydrophobic layer is a spray layer obtained by spraying AVS-7 nano-hydrophobic material; the fiber support layer is a spider web-like support layer formed by hot-melting high-strength and high-modulus polyethylene fibers in a 100mm strip shape and soft cloth.

[0009] The umbrella cloth is a square integrated structure surrounded by four triangles, a circular through hole for connecting a fixing flange is opened in the center, and connecting pieces for connecting with an opening and closing connecting rod mechanism are connected to the four corners.

[0010] The connecting piece is a triangular steel plate, and a threaded hole for connecting with the opening and closing connecting rod mechanism is opened on the triangular steel plate.

[0011] The outer side wall of the wellhead guide is axially provided with a strip guide block for guiding the upward and downward sliding of the opening and closing connecting rod mechanism; the guide block is provided with a plurality of horizontally arranged fixed control pin holes from top to bottom, and the fixed control pin holes are used for inserting positioning pins into the fixed opening and closing connecting rod mechanism after the umbrella cloth is unfolded into place.

[0012] The opening and closing connecting rod mechanism includes a support frame, a sliding flange, an electric winch and a wire rope; the sliding flange is sleeved on the wellhead guide tube; two electric winches are provided, and the two electric winches are connected to the sliding flange relative to each other; two wire rope fixing points are provided on the wellhead guide tube between the sliding flange and the fixed flange, and the two wire rope fixing points are respectively located directly above each electric winch; one end of the wire rope is connected to the electric winch, and the other end of the wire rope is connected to the wire rope fixing point; the bottom end of the support frame is hinged on the sliding flange, and the top end of the support frame is respectively hinged to the outer periphery of the umbrella cloth and the fixed flange; the inner side wall of the sliding flange is provided with a guide groove.

[0013] The steel wire rope fixing point is connected with a connector for connecting the steel wire rope; the connector includes a fixing block and a connecting ring, and the connecting ring is fixed on the side wall of the wellhead conduit through the fixing block; and a hook is connected to the connecting end of the steel wire rope and the steel wire rope fixing point.

[0014] The support frame includes multiple supports and multiple diagonal braces; a diagonal brace is hinged in the middle of each support; the bottom end of the support is hinged on the sliding flange, and the bottom end of the support is hinged on the outer periphery of the umbrella cloth; the top end of the diagonal brace is hinged on the fixed flange; multiple supports are evenly arranged, and each support and the diagonal brace connected thereto are located in the same plane.

[0015] There are four supports.

[0016] Beneficial effects:

[0017] (1) The utility model is composed of an umbrella cloth, a fixing flange, an opening and closing connecting rod mechanism and a wellhead guide tube, which not only solves the defects of the traditional iron mud guard umbrella, but also realizes the automatic lifting and clean production of the mud guard umbrella at the drilling site.

[0018] (2) The utility model only requires one person to realize the retraction and deployment of the wellhead mud guard umbrella, and the installation of the wellhead mud guard umbrella, which originally took 4 hours, can be completed in 1 hour.

[0019] (3) The utility model has reasonable hanging point settings and light weight, which reduces the risk of multiple people working together for installation.

[0020] (4) The utility model reduces labor intensity, and electric lifting and lowering does not require human labor; at the same time, when operating a large well group, it is only necessary to retract the soft mud guard umbrella and adjust the angle of the outlet pipe without disassembly.

[0021] (5) When the utility model is not in use, the mud guard umbrella can be recovered, thereby reducing the size of the device and facilitating transportation.

[0022] (6) The umbrella cloth of the utility model is made of multiple layers of heat-sealed material, which is not only high in strength, corrosion-resistant and large in area, but also has a hydrophobic layer, which reduces the accumulation of mud and effectively prolongs the service life.

[0023] (7) The utility model is reusable and can be replaced even if the umbrella cloth is damaged, thereby effectively reducing the cost of use.

[0024] (8) The utility model adopts a four-link mechanism to support the umbrella cloth, which is flexible and has reliable strength.

[0025] (9) The lower part of the utility model adopts a rotatable well sealing flange, which can adjust the angle of the outlet pipe in real time.

[0026] 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

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be 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 paying creative work.

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] In the figure: 1. umbrella cloth; 2. fixed flange; 3. support; 4. sliding flange; 5. wellhead guide tube; 6. electric winch; 7. wire rope; 8. wire rope fixing point; 9. well plug flange; 10. diagonal support. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1:

[0032] according to Figure 1 An automatic flow collecting device for a wellhead of a petroleum drilling is shown, comprising an umbrella cloth 1, a fixed flange 2, an opening and closing connecting rod mechanism and a wellhead conduit 5; the center of the umbrella cloth 1 is connected to the top end of the wellhead conduit 5 through the fixed flange 2; the opening and closing connecting rod mechanism is used to control the opening and closing of the umbrella cloth 1, the lower end of the opening and closing connecting rod mechanism is connected to the wellhead conduit 5 in a sliding manner up and down, and the upper end of the opening and closing connecting rod mechanism is respectively connected to the outer periphery of the umbrella cloth 1 and the fixed flange 2; the lower end of the wellhead conduit 5 is connected to a relatively rotatable well sealing device flange 9.

[0033] In actual use, the device is connected to the well plug through the well plug flange 9. When mud recovery is not required, the opening and closing link mechanism is in the recovery state. When mud recovery is required, the opening and closing link mechanism is started and gradually expands outward to open the umbrella cloth 1; when the umbrella cloth 1 is expanded to the required degree, the opening and closing link mechanism stops and is fixed.

[0034] The utility model is organically composed of umbrella cloth 1, fixed flange 1, opening and closing connecting rod mechanism and wellhead guide tube 5, which not only solves the defects of traditional iron mud guard umbrella, but also realizes the automatic lifting and clean production of mud guard umbrella at drilling site.

[0035] The utility model only needs one person to realize the retraction and deployment of the wellhead mud guard umbrella, and the installation of the wellhead mud guard umbrella which originally required 4 hours can be completed in 1 hour.

[0036] The utility model has reasonable hanging point arrangement and light weight, thus reducing the installation risk of multiple people working together.

[0037] The utility model reduces labor intensity, and electric lifting and lowering does not require human labor; at the same time, when operating a large well group, it only needs to retract the soft mud guard umbrella and adjust the outlet pipe angle without disassembly. The utility model can recycle the mud guard umbrella when not in use, thereby reducing the size of the device and facilitating transportation.

[0038] The utility model is reusable and can be replaced even if the umbrella cloth is damaged, thus effectively reducing the use cost.

[0039] The utility model adopts a four-link mechanism to support the umbrella cloth 1, which is flexible in extension and contraction and has reliable strength.

[0040] The lower part of the utility model adopts a rotatable well sealing device flange 9, which can adjust the angle of the outlet pipe in real time.

[0041] Embodiment 2:

[0042] according to Figure 1 The oil drilling wellhead automatic current collecting device shown is different from the first embodiment in that the umbrella cloth 1 is a multi-layer structure made of soft polymer material.

[0043] Furthermore, the multi-layer structure includes a hydrophobic layer, a fiber support layer and a PVC layer; the hydrophobic layer, the fiber support layer and the PVC layer are arranged in order from top to bottom and are heat-sealed to form an integrated structure; the hydrophobic layer is a spray layer obtained by spraying AVS-7 nano-hydrophobic material; the fiber support layer is a spider web-like support layer formed by hot-melting high-strength and high-modulus polyethylene fibers with a structure of 100 mm strips and soft cloth.

[0044] The soft polymer material in this embodiment is high-strength and high-modulus polyethylene fiber #7091, which has high strength, high temperature resistance, high toughness, good hydrophobicity and corrosion resistance, and weighs only 1 / 3 of an iron pallet.

[0045] The provision of the hydrophobic layer reduces the accumulation of mud on the umbrella cloth surface, can increase the umbrella cloth flow collection area, thereby reducing the leakage of mud and effectively extending the service life of the utility model.

[0046] Embodiment three:

[0047] according to Figure 1 The oil drilling wellhead automated flow collecting device shown is different from the first or second embodiment in that the umbrella cloth 1 is a square integrated structure surrounded by four triangles, a circular through hole for connecting the fixing flange 2 is opened in the center, and connecting parts for connecting to the opening and closing connecting rod mechanism are connected to the four corners.

[0048] The umbrella cloth 1 adopts the above technical solution, which can adapt to the wellhead environment and achieve a better flow collection effect.

[0049] A circular through hole for connecting the fixing flange 2 is provided in the center of the umbrella cloth 1, making the connection more convenient.

[0050] Connectors are connected to the four corners of the umbrella cloth 1, which not only facilitates the connection with the opening and closing connecting rod mechanism, but also makes the connection more stable and the force is evenly distributed, so that the umbrella cloth 1 is not easily damaged and its service life is extended.

[0051] The umbrella cloth 1 of the utility model can be replaced when damaged, which effectively reduces the use cost.

[0052] Embodiment 4:

[0053] according to Figure 1 The oil drilling wellhead automated flow collecting device shown is different from the third embodiment in that the connecting piece is a triangular steel plate with threaded holes for connecting with the opening and closing connecting rod mechanism.

[0054] The technical solution that the connecting piece is a triangular steel plate is not only easy to implement, but also convenient to use and has low cost.

[0055] Embodiment five:

[0056] according to Figure 1 The oil wellhead automatic flow collecting device shown in the figure is different from the first embodiment in that: the outer wall of the wellhead guide pipe 5 is axially provided with a strip guide block for guiding the upward and downward sliding of the opening and closing connecting rod mechanism; the guide block is provided with a plurality of horizontally arranged fixed control pin holes from top to bottom, and the fixed control pin holes are used for inserting positioning pins into the fixed opening and closing connecting rod mechanism after the umbrella cloth 1 is unfolded into place.

[0057] In actual use, the setting of the guide block ensures that the opening and closing connecting rod mechanism does not deviate when sliding up and down. When the umbrella cloth 1 is unfolded to the right position, the positioning pin is inserted into the fixed control pin hole to make the opening and closing connecting rod mechanism stop stably.

[0058] Embodiment six:

[0059] according to Figure 1 The oil drilling wellhead automated current collecting device shown in the figure is different from the embodiment 1 in that: the opening and closing connecting rod mechanism includes a support frame, a sliding flange 4, an electric capstan 6 and a wire rope 7; the sliding flange 4 is sleeved on the wellhead guide tube 5; two electric capstans 6 are provided, and the two electric capstans 6 are connected to the sliding flange 4 opposite to each other; two wire rope fixing points 8 are provided on the wellhead guide tube 5 between the sliding flange 4 and the fixed flange 2, and the two wire rope fixing points 8 are respectively located directly above each electric capstan 6; one end of the wire rope 7 is connected to the electric capstan 6, and the other end of the wire rope 7 is connected to the wire rope fixing point 8; the bottom end of the support frame is hinged on the sliding flange 4, and the top end of the support frame is hinged to the outer periphery of the umbrella cloth 1 and the fixed flange 2 respectively; the inner side wall of the sliding flange 4 is provided with a guide groove.

[0060] In actual use, when mud recovery is required, the electric winch 6 is started, the length of the steel wire rope 7 from the steel wire rope fixing point 8 to the electric winch 6 is gradually shortened, and the sliding flange 4 is gradually moved up, so that the support frame is gradually stretched outward, and the umbrella cloth 1 is gradually opened; when the umbrella cloth 1 is opened to the required degree, the electric winch 6 stops rotating, and the opening and closing connecting rod mechanism is fixed. When the umbrella cloth 1 needs to be recovered, the electric winch 6 is started, and the length of the steel wire rope 7 from the steel wire rope fixing point 8 to the electric winch 6 is gradually increased, so that the support frame is gradually retracted, and the umbrella cloth 1 is gradually recovered until the sliding flange 4 returns to the limit point.

[0061] In this embodiment, a 24V electric winch is used to realize the automatic retraction and extension of the umbrella cloth 1, which greatly reduces the labor intensity of the operator.

[0062] The utility model can recycle the mud guard umbrella when not in use, thereby reducing the volume of the device and facilitating transportation. The utility model adopts a four-link mechanism to support the umbrella cloth 1, which is flexible in extension and retractability and reliable in strength.

[0063] Embodiment seven:

[0064] according to Figure 1 The oil drilling wellhead automated flow collecting device shown is different from the sixth embodiment in that: the wire rope fixing point 8 is connected to a connecting piece for connecting the wire rope 7; the connecting piece includes a fixing block and a connecting ring, and the connecting ring is fixed to the side wall of the wellhead guide tube 5 through the fixing block; the connecting end of the wire rope 7 and the wire rope fixing point 8 is connected with a hook.

[0065] In actual use, the use of magnetic technology makes on-site connection more convenient.

[0066] Embodiment eight:

[0067] according to Figure 1 The oil drilling wellhead automated flow collecting device shown is different from the sixth embodiment in that: the support frame includes multiple supports 3 and multiple diagonal supports 10; a diagonal support 10 is hinged in the middle of each support 3; the bottom end of the support 3 is hinged on the sliding flange 4, and the bottom end of the support 3 is hinged on the outer periphery of the umbrella cloth 1; the top end of the diagonal support 10 is hinged on the fixed flange 2; multiple supports 3 are evenly arranged, and each support 3 and the diagonal support 10 connected thereto are located in the same plane.

[0068] In actual use, when mud recovery is required, the electric winch 6 is started, the length of the steel wire rope 7 from the steel wire rope fixing point 8 to the electric winch 6 is gradually shortened, and the sliding flange 4 is gradually moved upward, so that the bottom end of the support 3 is constantly moved upward with the sliding flange 4, and the diagonal brace 10 is constantly rotated upward around the fixed flange 2, so that the top of the support 3 drives the outer periphery of the umbrella cloth 1 to expand outward, and the umbrella cloth 1 is gradually stretched out. When the umbrella cloth 1 needs to be recovered, the electric winch 6 is started, the length of the steel wire rope 7 from the steel wire rope fixing point 8 to the electric winch 6 is gradually increased, and the sliding flange 4 is gradually moved downward, so that the bottom end of the support 3 is constantly moved downward with the sliding flange 4, and the diagonal brace 10 is constantly rotated downward around the fixed flange 2, so that the top of the support 3 drives the outer periphery of the umbrella cloth 1 to retract inward until the sliding flange 4 returns to the limit point.

[0069] The umbrella cloth 1 is supported by a four-bar linkage consisting of a support 3 and an oblique support 10, so that the umbrella cloth 1 can be flexibly extended and retracted.

[0070] Embodiment nine:

[0071] according to Figure 1 The oil drilling wellhead automated flow collecting device shown is different from the eighth embodiment in that four supports 3 are provided.

[0072] In actual use, due to the requirements of the on-site environment, it is more appropriate to use a square umbrella cloth. In order to cooperate with the folding and unfolding of the square umbrella cloth, a support 3 is connected to each of the four corners of the square to make the structure symmetrical and the force evenly distributed.

[0073] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0074] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0075] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0076] The above is only a preferred embodiment of the utility model. The utility model will not be limited to these embodiments shown in this article, but should conform to the widest range consistent with the principles and novel features disclosed in this article. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model still fall within the scope of the technical solution of the utility model.

Claims

1. An automatic flow collecting device for oil drilling wellhead, characterized by: It comprises an umbrella cloth (1), a fixed flange (2), an opening and closing connecting rod mechanism and a wellhead guide tube (5); the center of the umbrella cloth (1) is connected to the top end of the wellhead guide tube (5) through the fixed flange (2); the opening and closing connecting rod mechanism is used to control the opening and closing of the umbrella cloth (1); the lower end of the opening and closing connecting rod mechanism is connected to the wellhead guide tube (5) in a manner that it can slide up and down; the upper end of the opening and closing connecting rod mechanism is respectively connected to the outer periphery of the umbrella cloth (1) and the fixed flange (2) to control the opening and closing of the umbrella cloth (1); the lower end of the wellhead guide tube (5) is connected to a well sealing device flange (9) that can rotate relatively; The umbrella cloth (1) is a multi-layer structure made of soft polymer material; The multi-layer structure includes a hydrophobic layer, a fiber support layer and a PVC layer; the hydrophobic layer, the fiber support layer and the PVC layer are arranged in order from top to bottom and are heat-sealed to form an integrated structure; the hydrophobic layer is a spray coating obtained by spraying AVS-7 nano-hydrophobic material; the fiber support layer is a spider web-like support layer formed by hot-melting high-strength high-modulus polyethylene fiber with a structure of 100mm strips and soft cloth; The outer wall of the wellhead guide (5) is provided with a strip-shaped guide block along the axial direction, which is used to guide the upward and downward sliding of the opening and closing connecting rod mechanism; the guide block is provided with a plurality of horizontally arranged fixed control pin holes from top to bottom, and the fixed control pin holes are used to insert positioning pins into the fixed control pin holes after the umbrella cloth (1) is unfolded into place, so as to fix the opening and closing connecting rod mechanism; The opening and closing connecting rod mechanism comprises a support frame, a sliding flange (4), an electric winch (6) and a steel wire rope (7); the sliding flange (4) is sleeved on a wellhead guide tube (5); two electric winches (6) are provided, and the two electric winches (6) are connected to the sliding flange (4) in an opposite manner; two steel wire rope fixing points (8) are provided on the wellhead guide tube (5) between the sliding flange (4) and the fixed flange (2), and the two steel wire rope fixing points (8) are respectively located directly above each electric winch (6); one end of the steel wire rope (7) is connected to the electric winch (6), and the other end of the steel wire rope (7) is connected to the steel wire rope fixing point (8); the bottom end of the support frame is hinged on the sliding flange (4), and the top end of the support frame is respectively hinged to the outer periphery of the umbrella cloth (1) and the fixed flange (2); and the inner side wall of the sliding flange (4) is provided with a guide groove.

2. An automatic flow collecting device for oil drilling wellhead according to claim 1, characterized in that: The umbrella cloth (1) is a square integrated structure formed by four triangles, a circular through hole for connecting to a fixing flange (2) is provided in the center, and connecting pieces for connecting to an opening and closing connecting rod mechanism are connected to the four corners.

3. An automatic flow collecting device for oil drilling wellhead as claimed in claim 2, characterized in that: The connecting piece is a triangular steel plate, and a threaded hole for connecting with the opening and closing connecting rod mechanism is opened on the triangular steel plate.

4. The oil drilling wellhead automatic flow collecting device according to claim 1, characterized in that: The steel wire rope fixing point (8) is connected to a connecting piece for connecting the steel wire rope (7); the connecting piece comprises a fixing block and a connecting ring, and the connecting ring is fixed to the side wall of the wellhead guide tube (5) through the fixing block; the connecting end of the steel wire rope (7) and the steel wire rope fixing point (8) is connected to a hook.

5. The oil drilling wellhead automated flow collecting device according to claim 1, characterized in that: The support frame comprises a plurality of supports (3) and a plurality of diagonal supports (10); a diagonal support (10) is hingedly connected to the middle of each support (3); the bottom end of the support (3) is hingedly connected to a sliding flange (4), and the bottom end of the support (3) is hingedly connected to the outer periphery of the umbrella cloth (1); the top end of the diagonal support (10) is hingedly connected to a fixed flange (2); the plurality of supports (3) are evenly arranged, and each support (3) and the diagonal support (10) connected thereto are located in the same plane.

6. An automatic flow collecting device for oil drilling wellhead as claimed in claim 5, characterized in that: Four supports (3) are provided.

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