Hoisting balancing device for oil field wellhead hoisting object

Abstract

The utility model discloses an oil field well mouth lifting object lifting balancing device, which relates to the technical field of oil field well mouth lifting appliances, and comprises a lifting frame, a chain and a clamp, the lifting frame comprises a plurality of cross beams arranged in a circumferential array, the inner ends of the plurality of cross beams are fixedly connected, and the cross beams are linearly provided with a plurality of lifting holes; the clamp comprises two clamp arms of the same structure, the upper ends of the clamp arms are C-shaped connecting arms, and the outer sides of the lower ends of the clamp arms are provided with check blocks. The two clamp arms are symmetrically arranged, the middle parts of the C-shaped connecting arms of the two clamp arms are hinged, and the upper ends of the C-shaped connecting arms of the two clamp arms are provided with link holes; the clamp comprises a C-shaped clamping seat and a limiting bolt, the C-shaped clamping seat is matched with a wellhead hoisting flange, and a chaining hole is formed in the upper end of the C-shaped clamping seat; the limiting bolt is in threaded connection with the C-shaped clamping seat; the device can be used for horizontally hoisting three types of wellhead hoisting objects, namely a regular hoisting object containing an upper flange and a lower flange, an irregular hoisting object containing the upper flange and the lower flange and an irregular hoisting object only containing the lower flange, so that the flanges can be conveniently centered, and the object striking risk is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield wellhead hoisting tools, in particular to an oilfield wellhead hoisting balancing device. Background Art

[0002] There are many forms of hanging objects at the wellhead of oilfields, and their shapes are different. When lifting non-standard hanging objects with eccentric gravity, there will be eccentricity and imbalance, and personnel are required to assist in adjusting the angle of the hanging objects until it is horizontal to achieve the centering of the wellhead flange. In this way, there is a risk of object impact during the operation. Therefore, it is urgent to develop a hanging object lifting balance device to balance and correct the non-standard hanging objects at the wellhead of oilfields, so as to reduce the risk of object impact when assisting the wellhead hanging objects to align the flange.

[0003] Chinese patent CN206645696U discloses a round steel balancing hanger, which includes a balancing frame, which is placed horizontally and has fixing holes symmetrically arranged on both sides; a bearing seat, which includes two and is symmetrically fixed on the balancing frame; a screw, whose two ends are respectively fixed on the bearing seat; a moving slider, which is sleeved on the screw, and a gear matched with the screw is arranged at the connection part between the moving slider and the screw, and the moving slider performs translational movement through the rotation of the screw; a suspension block, which is fixed on the moving slider, and a circular suspension hole is also arranged on the suspension block; a cycloid pinwheel reducer, one end of which is connected to one end of the screw; a motor, which is connected to the other end of the cycloid pinwheel reducer, and controls the screw to rotate forward and reverse; a motor remote control device, which is connected to the motor and controls the motor switch; a battery pack, which is connected to the motor remote control device to provide power; a suspension rope, one end of which passes through the fixing hole and the other end is connected to the workpiece; the structure of the hanger is complex and is not suitable for lifting objects at the wellhead. Utility Model Content

[0004] The utility model aims to provide a lifting and balancing device for lifting objects at the wellhead of an oil field in view of the defects in the prior art.

[0005] The technical scheme of the utility model is: an oil field wellhead lifting object lifting balancing device, comprising a hanger, a chain and a clamp, wherein the hanger is connected with the clamp through the chain.

[0006] Preferably, there are multiple chains, and the positions of the chains on the hanger are adjustable.

[0007] Preferably, the hanger comprises a plurality of beams arranged in a circular array, the inner ends of the plurality of beams are fixedly connected, and a plurality of hanging holes are provided on the beams in a linear array; the chain is detachably connected to the hanging holes.

[0008] Preferably, the clamp comprises two clamp arms with identical structures, the upper ends of the clamp arms are C-shaped connecting arms, and the outer sides of the lower ends are provided with a stopper; the two clamp arms are symmetrically arranged, the middle parts of the two C-shaped connecting arms are hinged, and the upper ends of the two C-shaped connecting arms are provided with linking holes for connecting chains.

[0009] Preferably, a compression spring is provided between the two clamp arms, and the compression spring is located below the hinge point.

[0010] Preferably, the clamp includes a C-shaped holder and a limiting bolt, the C-shaped holder is adapted to the wellhead hanging flange, and a connecting hole for connecting a chain is provided at the upper end thereof; the limiting bolt is threadedly connected to the C-shaped holder.

[0011] Preferably, the clamp comprises two symmetrically arranged V-shaped frames, wherein the head of the V-shaped frame is provided with a half hoop, and both feet are provided with link holes for connecting the chain; one end of the two half hoops is hinged, and the other end is detachably connected by bolts.

[0012] Preferably, a rib is provided in the middle of the V-shaped frame.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The hangers and clamps of this device are provided with various styles, and different hangers and clamps can be selected for different types of hoisted objects; this device can realize horizontal lifting of three types of wellhead hoisted objects, namely, regular hoisted objects with upper and lower flanges, irregular hoisted objects with upper and lower flanges, and irregular hoisted objects with only lower flanges, which is convenient for flange alignment and greatly reduces the risk of object impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model in the first embodiment;

[0016] Figure 2 is a schematic diagram of the structure of the clamp in Example 1;

[0017] Figure 3 It is a schematic diagram of the structure of the utility model in the third embodiment;

[0018] Figure 4 It is a structural schematic diagram of the utility model in the fourth embodiment;

[0019] Figure 5 Schematic diagram of the structure of the clamp in the fourth embodiment.

[0020] In the figure: 1, hanger, 2, crossbeam, 201, hanging hole, 3, chain, 4, clamp arm, 5, C-shaped connecting arm, 6, stopper, 7, connecting hole, 8, compression spring, 9, C-shaped holder, 10, limit bolt, 11, V-shaped frame, 12, half hoop, 13, rib plate. DETAILED DESCRIPTION

[0021] The utility model is further described below with reference to the accompanying drawings and embodiments.

[0022] Wellhead hanging objects have many forms and shapes. However, the main feature of wellhead hanging objects is the flange docking, including two types: upper and lower flanges and only lower flanges. Therefore, the focus is on how to make the hanging objects level and facilitate flange centering. Typical hanging objects at the wellhead are classified into three categories according to their appearance: (1) regular hanging objects with upper and lower flanges (basically centered); (2) irregular hanging objects with upper and lower flanges (offset center of gravity); (3) irregular hanging objects with only lower flanges (offset center of gravity). Embodiment 1

[0023] Reference Figure 1-2 As shown, an oilfield wellhead lifting balance device comprises a hanger 1, a chain 3 and a clamp, wherein the hanger 1 is connected to the clamp via the chain 3. There are a plurality of chains 3, and the position of the chain 3 on the hanger 1 is adjustable.

[0024] In more detail, in this embodiment, eight chains 3 are provided, which are divided into four groups. The four groups of chains 3 are arranged in a circular array at the bottom of the hanger 1, and each group of chains 3 is connected to a clamp.

[0025] The clamp of this embodiment includes two clamp arms 4 with the same structure, the upper end of the clamp arm 4 is a C-shaped connecting arm 5, and a stopper 6 is provided on the outer side of the lower end; the two clamp arms 4 are symmetrically arranged, the middle parts of the two C-shaped connecting arms 5 are hinged, and the upper ends of the two C-shaped connecting arms 5 are provided with connecting holes 7 for connecting the chain 3.

[0026] This embodiment is aimed at regular-shaped lifting objects with upper and lower flanges, which basically do not deflect during the lifting process, such as: EU double-gate blowout preventer, ES double-gate blowout preventer, EB annular blowout preventer, EL annular blowout preventer, EW annular blowout preventer, etc.

[0027] When in use, the hanger 1 is hung on the hook of the crane, the four clamps are placed in the four upper flange holes in symmetrical positions, and then lifted. Under the pulling of the chain 3, the upper ends of the two C-shaped connecting arms 5 of the clamps are close to each other, and the two clamp arms 4 are driven to open, so that the two blocks 6 clamp the flange holes, thereby realizing horizontal lifting. Embodiment 2

[0028] As a preferred embodiment of the present utility model, this embodiment optimizes the structure of the clamp on the basis of the first embodiment, specifically:

[0029] A compression spring 8 is provided between the two clamp arms 4, and the compression spring 8 is located below the hinge point. When the clamp is inserted into the upper flange hole, the compression spring 8 can pre-open the two clamp arms 4, thereby helping the two stoppers 6 to clamp the flange holes in advance. Embodiment 3

[0030] Reference Figure 3 As shown, an oilfield wellhead lifting balance device comprises a hanger 1, a chain 3 and a clamp, wherein the hanger 1 is connected to the clamp via the chain 3. Three chains 3 are provided, and the position of the chain 3 on the hanger 1 is adjustable.

[0031] The hanger 1 of this embodiment includes three beams 2 arranged in a circular array, the inner ends of the three beams 2 are fixedly connected, and a plurality of hanging holes 201 are provided on the beams 2 in a linear array; three chains 3 correspond to one beam 2 respectively, the upper ends of the chains 3 are detachably connected to the hanging holes 201, and the lower ends are connected to a clamp.

[0032] The clamp of this embodiment includes a C-shaped holder 9 and a limiting bolt 10 . The C-shaped holder 9 is adapted to the wellhead hanging flange, and a connecting hole 7 for connecting the chain 3 is provided at its upper end. The limiting bolt 10 is threadedly connected to the C-shaped holder 9 .

[0033] This embodiment is directed to irregular hanging objects with upper and lower flanges, such as a casing head spool, a tubing head spool, and the like.

[0034] When in use, hang the hanger 1 on the hook of the crane, install the above three clamps on the three upper flange holes distributed in a circular array, then lift it for a short distance and observe whether the object is level. When the object is tilted, it is necessary to end the lifting and manually adjust the position of the upper end of the chain 3 on the beam 2 until the object is in a horizontal state during lifting. Embodiment 4

[0035] Reference Figure 4-5 As shown, a lifting and balancing device for hoisting objects at the wellhead of an oil field comprises a hanger 1, a chain 3 and a clamp, wherein the hanger 1 is connected to the clamp via the chain 3. Four chains 3 are provided, and the position of the chain 3 on the hanger 1 is adjustable.

[0036] The hanger 1 of this embodiment includes two beams 2 arranged in a circular array, the inner ends of the two beams 2 are fixedly connected, and a plurality of hanging holes 201 are provided on the beams 2 in a linear array; four chains 3 are divided into two groups, each group corresponds to a beam 2, and the two chains 3 of each group are connected to a hanging hole 201, and the lower ends of the four chains 3 are connected to the clamp.

[0037] The clamp of this embodiment includes two symmetrically arranged V-shaped frames 11, the head of the V-shaped frame 11 is provided with a half hoop 12, and the two feet are provided with connecting holes 7 for connecting the chain 3; one end of the two half hoops 12 is hinged, and the other end is detachably connected by bolts.

[0038] This embodiment is aimed at irregular hanging objects that only contain a lower flange, such as a throttle valve, a flat gate valve, a Christmas tree, etc. This type of hanging object has a pipe diameter change point similar to a "neck".

[0039] When in use, hang the hanger 1 on the hook of the crane, wrap the "neck" of the hanged object with two half hoops 12, and connect the two half hoops 12 with bolts; then lift it for a short distance to observe whether the hanged object is horizontal. When the hanged object is tilted, it is necessary to end the lifting and manually adjust the length of the chain 3 and the position of the chain 3 on the beam 2 until the hanged object is in a horizontal state during lifting. Embodiment 5

[0040] As a preferred embodiment of the present utility model, this embodiment optimizes the structure of the clamp on the basis of the fourth embodiment, specifically:

[0041] In order to improve the stability of the clamp structure, a rib 13 is provided in the middle of the V-shaped frame 11 .

[0042] The present invention is not limited to the above-mentioned embodiments. Within the knowledge scope of those skilled in the art, various changes can be made without departing from the purpose of the present invention. The changed contents still belong to the protection scope of the present invention.

Claims

1. An oilfield wellhead lifting and balancing device, characterized in that: It includes a hanger, a chain and a clamp, wherein the hanger is connected to the clamp via a chain, a plurality of chains are provided, and the position of the chain on the hanger is adjustable; the clamp is one of the following two types of clamps; The first type, the clamp includes a C-shaped clamp and a limiting bolt, the C-shaped clamp is adapted to the wellhead hanging flange, and the upper end of the C-shaped clamp is provided with a link hole for connecting a chain; the limiting bolt is threadedly connected to the C-shaped clamp; The second type, the clamp includes two symmetrically arranged V-shaped frames, the head of the V-shaped frame is provided with a half hoop, and the two feet are provided with connecting holes for connecting the chain; one end of the two half hoops is hinged, and the other end is detachably connected by bolts.

2. The oilfield wellhead lifting and balancing device according to claim 1 is characterized in that: The hanger comprises a plurality of beams arranged in a circular array, the inner ends of the plurality of beams are fixedly connected, and a plurality of hanging holes are arranged on the beams in a linear array; the chain is detachably connected to the hanging holes.

3. The oilfield wellhead lifting and balancing device according to claim 1 is characterized in that: A rib plate is arranged in the middle of the V-shaped frame.

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