CN213326494U - Cable is support sky pulley for blowout preventer - Google Patents

Abstract

The utility model discloses a cable is support day pulley for blowout preventer adopts the support to fix cable day pulley biasing installation on blowout preventer cluster top, makes the cable come out from the day pulley race and coaxial with cable seal control head the central axis when getting into cable seal control head downwards, effectively solves traditional cable blowout preventer operation, and lifting device carries the cable of the unable thoroughly solution all the time and grinds the problem on seal head top to one side of hanging a day pulley operation mode. The hoisting ring is arranged at the top end of the support, so that hoisting operation can be carried out by using a short hoisting rigging, the integral hoisting operation height of the blowout prevention pipe string and the crown block can be greatly reduced, the requirement on the maximum hoisting height of a crane boom is reduced, the operation tonnage of the crane is correspondingly reduced, and the purchase or lease cost and the operation cost of the crane are greatly reduced. In addition, the support crown block is much lower in cost and weight than a pressure crown block, is more convenient to assemble, disassemble and maintain, does not bear pressure, does not need to be sealed, and greatly reduces operation risks.

Description

Cable is support sky pulley for blowout preventer

Technical Field

The utility model relates to an oil gas field cable blowout preventer takes area operation technical field, especially relates to a cable is support sky pulley for blowout preventer.

Background

In the oil and gas field cable blowout preventer under-pressure operation well site, the connection and disassembly of the blowout preventer string wellhead are traditionally realized by using a crane hook to hang a hoisting triangle plate of a hoisting tool component in the blowout preventer, the hoisting point at the upper end of the hoisting triangle plate is hung on the crane hook, the hoisting points at two sides of the lower part of the hoisting triangle plate are connected with two steel wire rope sling devices and a hoisting clamping plate, the hoisting clamping plate is clamped on a blowout preventer or a cable seal control head, the whole set of blowout preventer string is hoisted by the hoisting tool consisting of the hoisting triangle plate, the two steel wire rope sling devices and the hoisting clamping plate through a crane, a cable crown block is hung on the middle hoisting point of the hoisting triangle plate, an operation cable bypasses a crown block top end wheel groove, one end of the operation cable downwards enters the blowout preventer internal connection tool string or instrument string from the cable seal control head to carry out the lifting and descending operation. Because the crown block is hung at the middle lifting point of the lifting triangle, a cable which enters the cable sealing control head from the crown block downwards has a horizontal position difference of the radius of the crown block, so that the top ends of the cable and the sealing control head are worn, the service life of the cable and the sealing control head is influenced, the cable is generally deep in well descending operation, the underground operation distance of the cable is long, the operation frequency is high, the cable and the top end of the sealing control head are worn, the cable is also worn out to form a deep groove for the sealing control head to clamp the cable, and further accidents are caused.

Therefore, in the traditional cable blowout preventer, the length of a steel wire rope rigging in a hoisting tool is usually increased to reduce the inclination angle of a cable which enters a cable sealing control head downwards, so that the eccentric wear degree of the cable and the top end of the sealing control head is reduced, but the eccentric wear phenomenon cannot be completely eliminated, meanwhile, the vertical distance between the top end of the sealing control head and a crown block is large, correspondingly, higher requirements on the lifting height of a crane boom are provided, the tonnage of the crane is correspondingly increased, and the operation cost of the crane is correspondingly increased. The belt pressure crown block is high in cost, heavy in weight, complex in processing, manufacturing and maintenance and difficult in troubleshooting, especially high pressure bearing during operation is increased in operation risk, and the high-pressure large-diameter belt pressure crown block has a plurality of technical difficulties, does not have available mature products and is large in application limited degree.

Disclosure of Invention

To the problem that exists, the utility model aims at providing a cable blowout preventer support sky pulley adopts the support to fix the installation of cable sky pulley biasing on blowout preventer cluster top, makes the cable come out from the sky pulley race and coaxial with cable seal control head the central axis when getting into cable seal control head downwards, effectively solves the problem on cable eccentric wear seal head top in the operation of traditional cable blowout preventer. The hoisting ring is arranged at the top end of the support, so that hoisting operation can be carried out by using a short hoisting rigging, the integral hoisting operation height of the blowout prevention pipe string and the crown block can be greatly reduced, the requirement on the maximum hoisting height of a crane boom is reduced, the operation tonnage of the crane is correspondingly reduced, and the purchase or lease cost and the operation cost of the crane are greatly reduced. In addition, the support crown block is much lower in cost and weight than a pressure crown block, is more convenient to assemble, disassemble and maintain, does not bear pressure, does not need to be sealed, and greatly reduces operation risks. The support cable crown block can also be applied to a blowout prevention pipe string grabbing operation mode, and the support directly bears down force transmitted by cable tension through the crown block.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a cable is support day pulley for blowout preventer which characterized in that: the support sky pulley is including having fenestrate top backup pad in center and bottom backup pad to perpendicular equipartition has the spliced pole that is used for the support between the two top backup pad goes up one side biasing and is equipped with the sky pulley, and the pulley groove tangent line of this sky pulley inboard is with the fenestrate axis collineation in top backup pad and bottom backup pad center.

Preferably, the interval is equipped with a plurality of intermediate support boards the same with both structures between top backup pad and the bottom backup pad, the spliced pole is cut apart into a plurality of nipple joint column structures for detachable supported connection is between top backup pad and intermediate support board, between adjacent intermediate support board, and between intermediate support board and the bottom backup pad.

Preferably, each middle supporting plate and each bottom supporting plate are rotatably sleeved on the outer wall of the blowout preventer.

Preferably, a lifting ring is arranged on the top end supporting plate.

The utility model has the advantages that: (1) the support crown block effectively solves the problem that the operation mode of lifting the crown block by a lifting tool cannot be thoroughly solved all the time in the operation of the traditional cable blowout preventer, and the problem that the top end of a sealing head is eccentrically worn by a cable. (2) The hoisting rings are arranged on the top supporting plate, so that hoisting operation can be carried out by using shorter hoisting rigging, the integral hoisting operation height of the blowout prevention pipe string and the crown block can be greatly reduced, the requirement on the maximum hoisting height of a crane boom is reduced, the operation tonnage of the crane is correspondingly reduced, and the purchase or lease cost and operation cost of the crane are greatly reduced. (3) Compared with an under-pressure crown block, the support crown block is much lower in cost and weight, more convenient to assemble, disassemble and maintain, free of bearing pressure and sealing, and greatly reduced in operation risk.

Drawings

Fig. 1 is the whole structure diagram of the support top pulley of the utility model.

Fig. 2 is the utility model discloses support sky pulley uses at hoist and mount operation mode schematic diagram.

Fig. 3 is an enlarged view of fig. 2A according to the present invention.

Figure 4 is the utility model discloses support day pulley uses and grabs the operation mode schematic diagram.

Fig. 5 is an enlarged view of fig. 4B according to the present invention.

Fig. 6 is a schematic diagram of the conventional hoisting operation which is easy to generate eccentric wear.

Fig. 7 is an enlarged view of fig. 6C.

Fig. 8 is a schematic view of cable guiding using a belt overhead sheave.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

Referring to the attached drawings 1-5, the support crown block for the cable blowout preventer 1 comprises a top support plate 11 and a bottom support plate 12 with a central through hole, connecting columns 13 for supporting are vertically and uniformly distributed between the top support plate 11 and the bottom support plate, a crown block 14 is arranged on one side of the top support plate 11 in an offset mode, and a pulley groove tangent line on the inner side of the crown block 14 is collinear with the central through hole axes of the top support plate 11 and the bottom support plate 12. When the support sky pulley is actually used (as shown in fig. 3), the bottom support plate 12 is sleeved on a shoulder of the cable sealing head 3 at the top of the blowout preventer string 2 through the central through hole of the support sky pulley to support the support sky pulley 1 integrally in a downward pressed manner and in an upward lifting manner, and the top end of the cable sealing head 3 is located at a proper distance below the bottom surface of the top support plate 11, so that the downward pressure of the sky pulley 14 is ensured not to directly act on the top end of the cable sealing head 3. Because the tangent line of the pulley groove on the inner side of the crown pulley 14 is collinear with the axis of the central through hole of the top end support plate 11 and the bottom end support plate 12, when the cable 4 penetrating through the blowout preventer string 2 and the cable sealing head 3 is guided by the crown pulley 14, the cable 4 is also collinear with the axis of the blowout preventer string 2 and the cable sealing head 3, and the problem that the cable 4 is eccentrically worn at the top end of the cable sealing head 3 is solved.

Further in order to cooperate the cable sealing head 3 of different length, interval is equipped with a plurality of intermediate support plate 15 the same with both structures between top backup pad 11 and the bottom backup pad 12, a plurality of nipple joint column structures are cut apart into to spliced pole 13 for detachable supported connection is between top backup pad 11 and intermediate support plate 15, between adjacent intermediate support plate 15, and between intermediate support plate 15 and bottom backup pad 12. That is, a proper number of connecting columns 13 and intermediate support plates 15 can be selected according to the height of the cable sealing head 3, and the top support plate 11 and the bottom support plate 12 are matched to form the support crown block 1 with a proper length. The plurality of intermediate support plates 15 can further assist the bottom end support plate 12 in stably supporting the support crown block 1 on the cable sealing head 3 integrally.

Further, in order to improve the usability of the support crown block 1, the middle support plate 15 and the bottom support plate 12 are rotatably sleeved on the outer walls of the blowout preventer string 2 and the cable sealing head 3. The purpose is to enable the whole support crown block 1 to rotate 360 degrees around the cable sealing head 3 horizontally so as to adapt to the change of the position angle of the ground cable winch 5.

Further, in order to adapt to the hoisting operation of a crane and reduce the maximum hoisting height of a crane boom, a hoisting ring 16 is arranged on the top end supporting plate 11. When the crane is used for operation, a short sling is used to connect the hook and the lifting ring (as shown in fig. 3), the entire blowout preventer string can be lifted up for lifting operation through the support top sheave 1, the weight of the blowout preventer string is borne by the top sheave support, and the force transmitted by the cable 4 on the top sheave 14 can be borne by the crane hook. When the crane is not used for hoisting operation, but a special grabbing operation device (as shown in fig. 4-5) is used for grabbing operation, the downward force transmitted by the cable 4 on the top sheave 14 is transmitted to the blowout preventer string 2 through the bottom support plate 12 at the bottom of the support top sheave 1 and is borne by the blowout preventer string 2.

The principle of the utility model is that: the support top pulley 1 adopts a support to install and fix the cable top pulley on the top end of the blowout preventer string 2 in a biased manner, so that when the cable 4 comes out of a pulley groove of the top pulley 14 and enters the cable sealing control head 3 downwards, the cable top pulley is coaxial with the central axis of the cable sealing control head 3, and the problem that the cable 4 is worn on the top end of the cable sealing head 3 in a way that a hoisting tool hoists the top pulley in the operation of the traditional cable blowout preventer is solved effectively (as shown in fig. 6-7). The top end of the bracket is provided with the hoisting ring 16, so that a shorter hoisting rigging can be used for hoisting operation, the integral hoisting operation height of the blowout prevention pipe string and the crown block can be greatly reduced, the requirement on the maximum hoisting height of a crane boom is reduced, the operation tonnage of the crane is correspondingly reduced, and the purchase or lease cost and the operation cost of the crane are greatly reduced. In addition, the support crown block 1 has much lower cost and weight than a belt pressing crown block 6 (shown in figure 8), is more convenient to disassemble, assemble and maintain, does not bear pressure, does not need to be sealed, and greatly reduces the operation risk. The support crown block can also be applied to a blowout preventer string grabbing operation mode (as shown in figures 4-5), and the support directly bears down force transmitted by cable pulling force through the crown block.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. The utility model provides a cable is support day pulley for blowout preventer which characterized in that: support day pulley (1) is including top backup pad (11) and bottom backup pad (12) that have the perforation in center to perpendicular equipartition has spliced pole (13) that are used for supporting between the two top backup pad (11) goes up one side biasing and is equipped with day pulley (14), and the pulley groove tangent line of this day pulley (14) inboard is with the perforation axis collineation in top backup pad (11) and bottom backup pad (12) center.

2. The rack top sheave for a cable blowout preventer of claim 1, wherein: the interval is equipped with a plurality of intermediate support board (15) the same with both structures between top backup pad (11) and bottom backup pad (12), spliced pole (13) are cut apart into a plurality of nipple joint column structures for detachable supported connection between top backup pad (11) and intermediate support board (15), between adjacent intermediate support board (15), and between intermediate support board (15) and bottom backup pad (12).

3. The rack top sheave for a cable blowout preventer of claim 2, wherein: and each intermediate support plate (15) and each bottom support plate (12) are rotatably sleeved on the outer wall of the blowout preventer.

4. The rack top sheave for a cable blowout preventer of claim 3, wherein: and a lifting ring (16) is arranged on the top end supporting plate (11).

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