A kind of lifting device and injection head

Abstract

The present invention discloses a hoist and an injection head, and relates to the technical field of oil and gas drilling. The hoist comprises a first hoisting arm, a sliding hoisting arm arranged in parallel, and a second hoisting arm connected to both ends of the first hoisting arm and arranged in parallel, the sliding hoisting arm and the second hoisting arm are both hinged to the object to be hoisted, and the second hoisting arm is provided with a slide extending along the length direction of the second hoisting arm, and the end of the sliding hoisting arm slides in the slide. The sliding hoisting arm and the second hoisting arm together form an adjustable base for connecting the first hoisting arm. After the hoisting device hoists the object to be hoisted, the hoist is affected by the gravity of the object to be hoisted, and the end of the sliding hoisting arm will automatically slide in the slide of the second hoisting arm according to the center of gravity of the object to be hoisted, so as to ensure that the hoisting point and the center of gravity of the object to be hoisted are always in the same straight line, avoiding shaking and tilting of the object to be hoisted during the hoisting process, and making the hoisting operation safer.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas drilling and production, and in particular to a hanger and an injection head. Background Art

[0002] The injection head is the core component of the coiled tubing equipment and is widely used in the fields of oil and gas extraction and production increase. Its main function is to clamp the coiled tubing and overcome the upward force and friction of the downhole pressure on the coiled tubing, lower the coiled tubing into the well, hold it still, or pull it out of the well, and control the injection and pull-out speed of the coiled tubing.

[0003] When performing continuous tubing operations, a crane is usually used to lift the injection head for operation. In the prior art, a wire rope sling is usually installed on the top of the injection head frame. During operation, the injection head is lifted to a position more than ten meters above the wellhead by a crane, and the injection head is connected to the wellhead through a blowout preventer box and a blowout preventer. However, when the injection head is installed on the top of the wellhead, the injection head is tilted as a whole due to the effects of the injection head gooseneck and the continuous tubing. It is difficult to align the center line of the injection head with the wellhead, and it is difficult to install the injection head on the wellhead. It is usually necessary to use a wire rope tied to the injection head frame to pull the injection head straight to align it with the wellhead. In addition, the wire rope is a flexible material. The use of a wire rope for lifting can easily cause the injection head to shake and entanglement, which causes great trouble to on-site lifting and construction. Summary of the invention

[0004] The purpose of the present invention is to provide a hoist and an injection head to solve the technical problems in the prior art that the injection head shakes during hoisting and the hoisting point is not at the center of gravity of the injection head.

[0005] The embodiment of the present invention is achieved as follows:

[0006] According to one aspect of an embodiment of the present invention, a hoisting device is provided, comprising a first hoisting arm, a sliding hoisting arm arranged in parallel, and a second hoisting arm connected to both ends of the first hoisting arm and arranged in parallel, the sliding hoisting arm and the second hoisting arm are both hinged to the object to be hoisted, the second hoisting arm is provided with a slide extending along the length direction of the second hoisting arm, and the end of the sliding hoisting arm slides in the slide.

[0007] Optionally, the above-mentioned lifting device also includes a third lifting arm arranged between the first lifting arm and the second lifting arm, and the first lifting arm and the second lifting arm are connected through the third lifting arm.

[0008] Optionally, the above-mentioned sliding lifting arm includes a sliding shaft, a first sliding arm and a second sliding arm arranged in parallel, the first sliding arm and the second sliding arm are respectively located on both sides of the same second lifting arm, the sliding shaft passes through the first sliding arm, the slideway and the second sliding arm in sequence to fix the first sliding arm and the second sliding arm, and the sliding shaft slides in the slideway.

[0009] Optionally, the first lifting arm includes a bending portion and connecting portions connected to both ends of the bending portion.

[0010] Optionally, the connecting portion includes a flexible portion and a rigid portion, one end of the flexible portion is connected to the bending portion, and the other end is connected to the rigid portion.

[0011] Optionally, the above-mentioned lifting device also includes a first crossbeam, and the first crossbeam is connected between two ends of the first lifting arm.

[0012] Optionally, the above-mentioned lifting device also includes a second cross beam, and the second cross beam is connected between the second lifting arms.

[0013] Optionally, the first lifting arm is hinged to the second lifting arm.

[0014] Optionally, the third lifting arm is hinged to the first lifting arm and the second lifting arm respectively.

[0015] Another aspect of an embodiment of the present invention provides an injection head, comprising an injection head body and any one of the above-mentioned hangers arranged on the injection head body.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] On the one hand, an embodiment of the present invention provides a sling, which is arranged on the upper surface of an object to be hoisted, and a lifting device realizes the hoisting of the object to be hoisted through the sling. The sling includes a first hoisting arm, a sliding hoisting arm arranged in parallel, and a second hoisting arm connected to both ends of the first hoisting arm and arranged in parallel, the sliding hoisting arm and the second hoisting arm are both hinged to the object to be hoisted, and the second hoisting arm is provided with a slide extending along the length direction of the second hoisting arm, and the end of the sliding hoisting arm slides in the slide. The first hoisting arm is located in the middle, and two parallel second hoisting arms are respectively connected to the two ends of the first hoisting arm, and two parallel sliding hoisting arms are respectively slidably connected to the two second hoisting arms, and the sliding hoisting arm and the second hoisting arm together form an adjustable base for connecting the first hoisting arm. After the lifting device lifts the object to be lifted, the lifting device is affected by the gravity of the object to be lifted, and the end of the sliding lifting arm will automatically slide in the slideway of the second lifting arm according to the center of gravity of the object to be lifted, so as to ensure that the lifting point and the center of gravity of the object to be lifted are always in the same straight line, avoiding shaking and tilting of the object to be lifted during the lifting process, making the lifting operation safer.

[0018] On the other hand, an embodiment of the present invention provides an injection head, including an injection head body and a hoisting device arranged on the injection head body. During the lifting process of the injection head, the hoisting device is affected by the gravity of the injection head body and can automatically adjust according to the center of gravity of the injection head body to ensure that the lifting point is always on the same straight line with the center of gravity of the injection head body. In this way, not only the shaking problem during the lifting process is avoided, but also it is ensured that the injection head body is always in a vertical state, which can be easily aligned with the wellhead, providing great convenience for on-site lifting and construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 A schematic structural diagram of a first-viewing angle of a sling provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a sling provided by an embodiment of the present invention from a second viewing angle;

[0022] Figure 3 A schematic structural diagram of a third viewing angle of a sling provided in an embodiment of the present invention.

[0023] Icons: 100-hoisting device; 110-first hoisting arm; 111-bending portion; 112-connecting portion; 1121-flexible portion; 1122-rigid portion; 120-sliding hoisting arm; 121-sliding shaft; 122-first sliding arm; 123-second sliding arm; 130-second hoisting arm; 131-slideway; 140-third hoisting arm; 150-first beam; 160-second beam. DETAILED DESCRIPTION

[0024] 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 part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] 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.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "set", "install", "connected", and "connected" 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 elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The injection head is the core component of the coiled tubing equipment and is widely used in the field of oil and gas extraction and production increase. Its function is to drive the coiled tubing in and out of the well to perform various downhole operations. When performing coiled tubing operations, a crane is usually used to lift the injection head for operation. In the prior art, a wire rope is usually set on the injection head, and the crane realizes the lifting of the injection head by lifting the wire rope. Usually, the installation method of the wire rope on the injection head is as follows: four wire ropes are used, one end of the four wire ropes is connected together to form a lifting point, and the other end is connected to the four corners of the top of the injection head frame respectively. However, the injection head includes a frame and a gooseneck. The gooseneck is set on one side of the top of the frame. The offset setting of the gooseneck causes the center of gravity of the injection head as a whole to be not at the center of the frame. Therefore, during the lifting process, the injection head is tilted as a whole, and the center line of the injection head is difficult to align with the wellhead. It is usually necessary to adjust the wire rope to pull the injection head straight to face the wellhead. The adjustment process is time-consuming and labor-intensive, and it is difficult to ensure that the lifting point must be on the same straight line as the center of gravity of the injection head. In addition, the steel wire rope is a flexible material, and the use of the steel wire rope for hoisting, especially when the injection head is tilted, is likely to cause the injection head to shake, and the steel wire rope is also likely to be entangled. In view of this, the present application is specially proposed.

[0028] Figure 1 This is a schematic structural diagram of a first viewing angle of a lifting device 100 provided in an embodiment of the present invention. Figure 2 This is a structural diagram of the second viewing angle of the lifting device 100 provided in an embodiment of the present invention, please refer to Figure 1 and Figure 2The present embodiment provides a sling 100, which is arranged on the upper surface of the object to be hoisted, and the hoisting device realizes the hoisting of the object to be hoisted through the sling 100. The sling 100 includes a first hoisting arm 110, a sliding hoisting arm 120 arranged in parallel, and a second hoisting arm 130 connected to both ends of the first hoisting arm 110 and arranged in parallel. The sliding hoisting arm 120 and the second hoisting arm 130 are both hinged to the object to be hoisted, and the second hoisting arm 130 is provided with a slideway 131 extending along the length direction of the second hoisting arm 130, and the end of the sliding hoisting arm 120 slides in the slideway 131. The first hoisting arm 110 is located in the middle, and two parallel second hoisting arms 130 are respectively connected to the two ends of the first hoisting arm 110, and the two parallel sliding hoisting arms 120 are respectively slidably connected to the two second hoisting arms 130, and the sliding hoisting arm 120 and the second hoisting arm 130 jointly form an adjustable base for connecting the first hoisting arm 110. After the lifting device lifts the object to be lifted, the lifting device 100 is affected by the gravity of the object to be lifted, and the end of the sliding lifting arm 120 automatically slides in the slideway 131 of the second lifting arm 130 according to the center of gravity of the object to be lifted, so as to ensure that the lifting point and the center of gravity of the object to be lifted are always in the same straight line, avoiding shaking and tilting of the object to be lifted during the lifting process, making the lifting operation safer. Compared with the prior art of lifting with wire rope, the technical problem of wire rope entanglement is also avoided.

[0029] It should be noted that, first, the lifting point is the point of action of the lifting device on the lifting device 100 , which is located on the first lifting arm 110 .

[0030] Second, the overall structure of the sling 100 is symmetrical, and the center of gravity of the sling 100 is located on the center line of the sling 100 .

[0031] Third, the object to be hoisted can be an injection head or other objects.

[0032] Fourth, the shapes of the first hanging arm 110, the second hanging arm 130 and the sliding hanging arm 120 are not limited as long as they can be connected to each other. For example, the cross-sectional shape of the first hanging arm 110, the second hanging arm 130 and the sliding hanging arm 120 is a rectangle.

[0033] Optionally, the angle between the side of the second hoisting arm 130 facing the sliding hoisting arm 120 and the object to be hoisted and the angle between the side of the sliding hoisting arm 120 facing the second hoisting arm 130 and the object to be hoisted are both acute angles. This setting can make the sling more stable and automatically stand on the surface of the object to be hoisted, and also make it easier for the sling to adjust according to the center of gravity of the object to be hoisted. At the same time, it is also more convenient for the hoisting device to hoist the object to be hoisted.

[0034] Optionally, the sliding hoisting arm 120 includes a sliding shaft 121, a first sliding arm 122 and a second sliding arm 123 arranged in parallel, and the ends of the first sliding arm 122 and the second sliding arm 123 are connected through the sliding shaft 121. The first sliding arm 122 and the second sliding arm 123 are respectively located on both sides of the same second hoisting arm 130, and the sliding shaft 121 passes through the first sliding arm 122, the slideway 131 of the second hoisting arm 130, and the second sliding arm 123 to fix the first sliding arm 122 and the second sliding arm 123, and the sliding shaft 121 slides in the slideway 131, thereby realizing that the end of the sliding hoisting arm 120 slides in the slideway 131.

[0035] Optionally, the hoist 100 further includes a third hoisting arm 140 disposed between the first hoisting arm 110 and the second hoisting arm 130, and the first hoisting arm 110 and the second hoisting arm 130 are connected via the third hoisting arm 140. The third hoisting arm 140 is used to increase the height of the hoisting point to prevent the hook of the hoisting device from hitting the object to be hoisted.

[0036] For example, if the object to be hoisted is an injection head, the injection head includes a frame and a gooseneck, and the gooseneck is arranged on one side of the top of the frame. When hoisting the injection head, the sling 100 needs to be installed on the top of the frame, so that the gooseneck of the injection head will be located next to the sling 100. If the overall height of the sling 100 is relatively low, the hook of the lifting device needs to be lowered to a lower position before it can hook the sling 100. During the process of the hook being lowered, it may hit the gooseneck next to the sling 100. The upper surface of the gooseneck is also fixed with an oil pipe, which may cause the hook to damage the gooseneck or the oil pipe. The setting of the third lifting arm 140 increases the height of the sling 100 and raises the hoisting point on the sling 100, so that the position where the hook of the lifting device is lowered does not need to reach the height of the gooseneck to hook the sling 100, effectively avoiding damage to the injection head.

[0037] In order to enable the hoisting device 100 to have different heights and to enable the hoisting device 100 to be adaptively adjusted according to the sizes and structures of different objects to be hoisted, optionally, the third hoisting arm 140 is a telescopic arm.

[0038] It should be noted that the structure of the third hoisting arm 140 is not specifically limited, as long as the third hoisting arm 140 has a telescopic function. For example, the third hoisting arm 140 includes a plurality of sleeves that are mutually sleeved, and two adjacent sleeves are connected by threads. When the height of the third hoisting arm 140 needs to be adjusted, the sleeves are rotated to change the screwing length of the threaded connection between the two adjacent sleeves (i.e., the overlapping length between the two adjacent sleeves), thereby changing the overall height of the third hoisting arm 140. Or, for example, the third lifting arm 140 includes a plurality of sleeves which are arranged one on top of the other. Between two adjacent sleeves, an opening is arranged at the end of the outer sleeve, and a protrusion is arranged at the end of the inner sleeve. The protrusion can be retracted into the inner sleeve after being compressed, and can automatically pop out again after the pressure is released. When it is necessary to increase the height of the third lifting arm 140, the inner sleeve is pulled out of the outer sleeve, and when the protrusion of the inner sleeve moves to the opening of the outer sleeve, it will automatically pop out and engage with the opening to achieve fixation between the inner sleeve and the outer sleeve.

[0039] Optionally, the first hoisting arm 110 includes a bending portion 111 and a connecting portion 112 connected to both ends of the bending portion 111. The first hoisting arm 110 is a symmetrical structure as a whole, with the bending portion 111 located in the middle. The bending point of the bending portion 111 is used as a hoisting point, which facilitates the connection and fixation of the hook of the lifting device with the sling 100, and prevents the hook from sliding back and forth on the first hoisting arm 110 and causing the object to be hoisted to shake. The connecting portion 112 is symmetrically connected to both sides of the bending portion 111, and the first hoisting arm 110 is connected to the second hoisting arm 130 through the connecting portion 112, so that the second hoisting arm 130 and the sliding hoisting arm 120 are symmetrically arranged on both sides of the first hoisting arm 110, ensuring the overall symmetry of the sling 100.

[0040] In this embodiment, there is no limitation on the shapes of the bending portion 111 and the connecting portion 112, as long as it is convenient for hoisting and the strength of the first hoisting arm 110 is guaranteed. For example, the bending portion 111 is in the shape of a broken line with an arc in the middle and a symmetrical structure, and the connecting portion 112 is in a straight line; the arc of the bending portion 111 is the hoisting point. The setting of the arc makes the shape transition of the first hoisting arm 110 more uniform, and also facilitates the connection and fixation of the hook of the lifting device to the hoisting point.

[0041] Optionally, the connecting portion 112 includes a flexible portion 1121 and a rigid portion 1122, one end of the flexible portion 1121 is connected to the bending portion 111, and the other end is connected to the rigid portion 1122. The setting of the flexible portion 1121 makes the sling 100 as a whole have a certain flexibility, and can be better adjusted according to the center of gravity of the object to be hoisted, further ensuring that the hoisting point and the center of gravity of the object to be hoisted are located on the same straight line. At the same time, it can also enable the sling 100 to have a certain buffering capacity to prevent the sling 100 from being damaged by sudden force during the hoisting process, which can better improve the service life of the sling 100. The rigid portion 1122 is set to ensure the structural strength and life of the connection between the first hoisting arm 110 and the second hoisting arm 130.

[0042] In this embodiment, the material of the flexible portion 1121 is not limited, as long as the sling 100 itself has a certain degree of flexibility. For example, the material of the flexible portion 1121 is a high-strength steel wire rope, which is made of multiple spiral steel wire bundles twisted together, has high strength, light weight, and is not easy to break suddenly. The high-strength steel wire rope can not only make the sling 100 itself have a certain degree of flexibility, but also play a role in lifting, pulling, tightening and bearing during the lifting process, and work smoothly and reliably.

[0043] Figure 3 This is a structural diagram of the third perspective of the lifting device 100 provided in an embodiment of the present invention, please refer to Figure 3 In order to improve the structural strength and stability of the sling 100, the sling 100 may further include a first crossbeam 150, which is connected between the two ends of the first hoisting arm 110. The first crossbeam 150 and the first hoisting arm 110 form a triangular structure, which is stable, reliable and can withstand a large tensile force, and can effectively prevent the sling 100 from breaking or deforming under the dual effects of the lifting device and the object to be hoisted during the hoisting process, thereby improving the tensile strength and service life of the sling 100.

[0044] Also in order to improve the structural strength and stability of the sling 100, optionally, the sling 100 also includes a second cross beam 160, which is connected between the second lifting arms 130 to support the second lifting arms 130 and prevent the second lifting arms 130 from bending, deforming or breaking after being subjected to force, so that the sling 100 has a stronger tensile strength and a longer service life.

[0045] The hoist 100 is installed on the surface of the object to be hoisted, and occupies a large space. Therefore, when the first hoisting arm 110 and the second hoisting arm 130 are directly connected, optionally, the first hoisting arm 110 and the second hoisting arm 130 are hinged.

[0046] When the first hanging arm 110 and the second hanging arm 130 are connected via the third hanging arm 140 , optionally, the third hanging arm 140 is hinged to the first hanging arm 110 and the second hanging arm 130 , respectively.

[0047] The parts of the sling 100 are hinged so that there is a certain rotation angle between each other. In a non-working state, the sling 100 can be folded and laid flat on the surface of the object to be hoisted, thus saving storage space.

[0048] In this embodiment, the hinge structure between the various parts of the hoist 100 is not limited. Taking the hinge between the second hoisting arm 130 and the third hoisting arm 140 as an example, the second hoisting arm 130 is a sheet-like structure as a whole, and the third hoisting arm 140 is rectangular. The end of the third hoisting arm 140 connected to the second hoisting arm 130 is provided with a notch, and the notch is used to allow the end of the second hoisting arm 130 to extend therein. The ends of the second hoisting arm 130 and the third hoisting arm 140 connected to each other are provided with corresponding pin holes. When the end of the second hoisting arm 130 extends into the notch of the third hoisting arm 140, the pin hole on the second hoisting arm 130 just corresponds to the pin hole on the third hoisting arm 140. After the pin passes through the pin holes on the second hoisting arm 130 and the third hoisting arm 140, it is fixedly connected to the nut, thereby realizing the hinge between the second hoisting arm 130 and the third hoisting arm 140.

[0049] This embodiment also provides an injection head, which includes an injection head body and a hanger 100 disposed on the injection head body. When the injection head is hoisted, it can ensure that the hoisting point is always in the same straight line with the center of the injection head, and there is less shaking and tilting during the hoisting process.

[0050] For example, the injection head body includes a frame and a gooseneck, the gooseneck is arranged on one side of the top of the frame, and the sling 100 is arranged on the top of the frame. The setting of the gooseneck causes the center of gravity of the injection head body to be not at the center of the frame, but during the hoisting process, the sling 100 is affected by the gravity of the injection head body and can automatically adjust according to the center of gravity of the injection head body to ensure that the hoisting point is always on the same straight line with the center of gravity of the injection head body. In this way, not only the shaking problem during the hoisting process is avoided, but also the frame of the injection head body is always in a vertical state, which can be easily aligned with the wellhead, providing great convenience for on-site hoisting and construction.

[0051] In the aforementioned explanation of the hanger 100 , the working mode and working principle of the hanger 100 when it is arranged on the injection head have been described in detail, which will not be repeated here.

[0052] The above description is only a preferred embodiment of the present invention and is 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 sling, characterized in that: The utility model comprises a first hoisting arm, a sliding hoisting arm arranged in parallel, and a second hoisting arm connected to both ends of the first hoisting arm and arranged in parallel, the sliding hoisting arm and the second hoisting arm are both hinged to the object to be hoisted, the second hoisting arm is provided with a slideway extending along the length direction of the second hoisting arm, and the end of the sliding hoisting arm slides in the slideway; The sling further comprises a third hoisting arm disposed between the first hoisting arm and the second hoisting arm, the first hoisting arm and the second hoisting arm being connected via the third hoisting arm; The sliding lifting arm comprises a sliding shaft, a first sliding arm and a second sliding arm arranged in parallel, the first sliding arm and the second sliding arm are respectively located on both sides of the same second lifting arm, the sliding shaft passes through the first sliding arm, the slideway and the second sliding arm in sequence to fix the first sliding arm and the second sliding arm, and the sliding shaft slides in the slideway; The sling also includes a second cross beam connected between the second lifting arms.

2. The sling according to claim 1, characterized in that: The first hanging arm includes a bending portion and connecting portions connected to two ends of the bending portion.

3. The sling according to claim 2, characterized in that: The connecting portion includes a flexible portion and a rigid portion, one end of the flexible portion is connected to the bending portion, and the other end of the flexible portion is connected to the rigid portion.

4. The sling according to any one of claims 1 to 3, characterized in that: Also included is a first cross beam connected between two ends of the first suspension arm.

5. The sling according to claim 1, characterized in that: The first hanging arm is hinged to the second hanging arm.

6. The sling according to claim 1, characterized in that: The third hanging arm is hinged to the first hanging arm and the second hanging arm respectively.

7. An injection head, characterized in that: The invention comprises an injection head body and a hanger as claimed in any one of claims 1 to 6 arranged on the injection head body.

Images