CN109973039A - Small quick cable lifter for the inner chamber of the working string under pressure - Google Patents

Abstract

The invention relates to a small quick cable lifter for the inner cavity of a pipe column under pressure. The locking main body is screwed with a pressure cap. There is a lifting ring on the pressure cap. The compression screw passes through the pressure cap and extends into it. On the limit steps at the upper ends of the two half cones. The locking vertebral body is formed by combining two half-cones, and its conical surface fits into the inner cavity of the locking body. The upper end of the semi-cone has a limit step, and the inner side has semicircular grooves that fit together after being fitted. There are upper and lower cable slots and grooves on the side of the pressing cap and locking body. The bottom of the slot is in the same position as the two half-cone and two semi-circular grooves. When in use, the cable is inserted into the locking body from the lower slot, the semicircular grooves of the two half cones clamp the cable, put the locking body from the top and press it tightly, tighten the pressure cap and the locking body with a wrench, and then Insert the upper slot into the pressure cap, i.e. clamp the cable. The invention has the advantages of simple structure, fast and convenient use, safety and reliability, no damage to the cable, small size, and is used for lifting and pulling the cable in the pressurized pipe column, and the operation time is high.

Description

Small quick lift for working string lumen under pressure

technical field

The invention belongs to the field of auxiliary tools for petroleum engineering operations, in particular to a small quick cable lifter used for the inner cavity of a pipe string for working under pressure.

Background technique

Cable lifters are generally used to lift or connect cables during accidents or salvage operations. During pressure logging (perforation) operations, due to factors such as operating environment and equipment failures, there may be jams, cables falling into wells, etc. In the event of an accident, the cable needs to be pulled or docked during salvage operations under pressure. Usually, the pressure logging (perforation) mainly controls the wellhead pressure through wellhead equipment such as cable blowout preventers, blowout preventers, and blowout preventers. If the wellhead is damaged, the wellhead is temporarily closed by the cable blowout preventer, the blowout preventer is disassembled to quickly connect the cable or the cable is suspended, then the blowout preventer is reconnected to restore the wellhead pressure, and then the cable is pulled in the blowout preventer. The existing cable lifter is mainly a T-type cable lifter. There are two locking structures. One is to fasten the cable through the cooperation of the cone and the cone frame, and the other is to fasten the cable through eight screws. Although the structure of the T-shaped cable lifter has a better clamping effect on the cable, it has a large volume (the length of the horizontal lifting rod is more than 400mm) and cannot be used in special pipe strings such as blowout pipes, especially by screws. It takes at least 20 minutes for each loading and unloading of the T-type cable lifter, which is time-consuming and labor-intensive to operate, and cannot meet the timeliness requirements of wellhead pressurized operations. Therefore, there is a need for a cable lifting device with a compact, reliable structure and quick operation, so as to meet the requirements of pulling cables in a special pipe string in a pressurized environment.

CN203585570 discloses a fast cone cable lifter, which includes a cylindrical cone frame main body and lateral lifting rods symmetrically arranged on both sides of its outer surface, and a locking cone whose inner surface is fitted through a cone surface; the cone frame The main body is composed of left and right two halves hinged through a biaxial hinge, and fixed by a locking screw and a nut after being combined. Its structure is complicated and its operation is complicated, and it cannot achieve the purpose of speed. The locking cone is a cone formed by the combination of left and right half cones, and the center of the inner surface of the two half cones is provided with a vertical groove that can match each other to form a cable hole. The grooves are somewhat abrasive to the clamped cables. The upper parts of the left and right half cones are provided with limiting steps which abut against and cooperate with the upper end of the main body of the cone frame, and the limiting steps are respectively hinged with pull rings. When releasing the locked state of the cable, the left and right half-cones are pulled apart by the pull ring, and the operation is complicated and laborious.

SUMMARY OF THE INVENTION

The purpose of the present invention is in view of the above-mentioned technical situation, and aims to provide a pipe string under pressure with good cable clamping effect, compact structure, simple and quick operation, and can be applied to the inner cavity of special pipe string such as blowout preventer for quick cable lifting. Small quick lift for inner cavity.

The purpose of the present invention is to realize the small quick cable lifter with the inner cavity of the working string under pressure, which has a locking main body and a locking vertebral body, and the locking cone is a cone formed by two half-cones butting together. body, the upper ends of the two half-cones have limited steps;

The tapered surface of the inner cavity of the locking body is closely matched with the outer tapered surface of the locking cone, the locking body is screwed to the pressure cap, and there is a lifting ring on the pressure cap; the compression screw passes through the pressure cap and extends into the Inside, it is stuck on the limit steps at the upper ends of the two half-cones; the side of the pressure cap has an upper slot from bottom to top, and an upper wrench groove; the side of the locking main body has a bottom from bottom to top. Slot, lower wrench notch;

The inner surfaces of the two half-cones of the locking vertebral body have semicircular grooves that can be aligned with each other after being aligned; the bottom of the upper slot on the side of the pressing cap, the bottom of the lower slot on the side of the locking body and The apposition positions of the semicircular grooves on the inner surfaces of the two half cones are consistent.

When in use, the cable is inserted into the locking body from the lower slot, the semi-circular groove of the two half cones clamps the cable, and is put into the locking body from the top. The wrench tightens the cap and the locking body, and the upper cable is inserted into the cap from the upper slot.

When the cable is released from the locked state, put the two compression screws under the limit step, unscrew the compression cap and the locking body in the opposite direction, take out the locking cone, and release the cable.

The invention has the advantages of simple structure, quick and convenient use, safety and reliability, the locking force reaches more than 8T, and the cable will not be damaged in the locked state.

The invention has a compact structure, can be used for pulling or connecting cables in special pipe strings such as blowout prevention pipes, and has high operation efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of half cone;

FIG. 3 is a right side view of FIG. 2 .

Detailed ways

1 , 2 and 3 , the present invention has a locking body 1 and a locking vertebral body 2 . The locking cone is a cone formed by abutting two half-cones, and the upper ends of the two half-cones have a limit step 10 .

The tapered surface of the inner cavity of the locking body 1 is closely matched with the outer tapered surface of the locking cone 2, the locking body is screwed with the pressure cap, and the pressure cap 3 has a lifting ring 4, which is convenient to carry. The compression screw 5 passes through the pressure cap, stretches into it, and is stuck on the spacing steps 10 at the upper ends of the two half cones.

The side of the pressure cap has an upper slot 12 from bottom to top, and an upper wrench notch 6 . The side of the locking main body has a lower slot 8 from bottom to top, and a lower wrench notch 7 . The bottom of the upper slot on the side of the pressing cap and the bottom of the lower slot on the side of the locking body are aligned with the semicircular grooves on the inner surfaces of the two half cones.

The inner surfaces of the two half-cones of the locking vertebral body have semicircular grooves 11 that can be mated with each other after mating, and the use of semicircular grooves has almost no wear on the clamped cables.

The inner diameter of the semicircular groove is smaller than the outer diameter of the cable to be clamped, and the inner wall is provided with anti-slip threads, so that the cable is clamped more firmly at the butting portion of the two half cones.

The upper and lower wrench notches are φ80mm wrench notches, which can be used with hexagonal open-ended wrenches.

The upper and lower slots are 12mm wide slots, which can quickly insert cables from the side.

The lifting ring 4 on the pressure cap is a load-bearing lifting ring formed by bending round steel with a diameter of 16 mm, and is welded on the top of the pressure cap.

When in use, the cable is inserted into the locking body 1 from the lower slot 8, the semicircular groove 11 of the two half cones clamps the cable, puts it into the locking main body from above, and locks the semicircle of the vertebral body after compression The grooves are used to clamp the cables. Tighten the pressure cap and the locking body with the hexagonal open-end wrench, the upper wrench notch 6, and the lower wrench notch 7, and tighten the locking cone, and the upper cable is inserted into the pressure cap from the upper slot 12. The present invention clamps the cable, and can carry out the operation of lifting or docking the cable.

By adopting the present invention, the cables are put into the pressing cap and the locking main body from the upper and lower slots, and the pressing cap and the locking main body are screwed together, and the operation is extremely convenient and quick.

When releasing the cable lock state, screw the two compression screws 5 into the pressure cap 3, and touch the limit steps at the upper ends of the two half-cones for 10 times, unscrew the pressure cap 3 and the locking body 1 in reverse, and Pull out the locking cone 2 and release the cable.

With the two present inventions, two disconnected cables can be quickly butted together without damaging the cables.

Claims (5)

1. the small-sized of Operating Pressure tubing string inner cavity quickly mentions cable device, there are locking main body and locking centrum, the fastening cones is served as reasons There are limited step in the cone that two hemicones are combined to form, two hemicone upper ends；It is characterized in that: the locking main body is interior The conical surface of chamber and the male cone (strobilus masculinus) of fastening cones are fitted close, and locking main body is spirally connected with pressure cap, there is lifting ring on pressure cap；Housing screw It across pressure cap, inserts into the inner, is stuck on the limited step of two hemicone upper ends；The pressure cap side have from bottom to top it is upper insert Slot, upper ejector lever cutting；The locking body side has lower slot from bottom to top, lower ejector lever cutting；

After two hemicone inner surfaces of the locking centrum have pairing, the semi-circular recesses of energy mutually pairing；The pressure cap side The underthrust slot bottom of body side and the semi-circular recesses pairing position one of two hemicone inner surfaces are locked in the upper slot bottom in face It causes.

2. the small-sized of Operating Pressure tubing string according to claim 1 inner cavity quickly mentions cable device, it is characterized in that: the semicircle The internal diameter of groove is less than the outer diameter of folded cable, and has antiskid thread on inner wall.

3. the small-sized of Operating Pressure tubing string according to claim 1 inner cavity quickly mentions cable device, it is characterized in that: described upper and lower Spanner cutting is φ 80mm spanner cutting.

4. the small-sized of Operating Pressure tubing string according to claim 1 inner cavity quickly mentions cable device, it is characterized in that: the locking is led Body side surface has the slot of 12mm wide.

5. the small-sized of Operating Pressure tubing string according to claim 1 inner cavity quickly mentions cable device, it is characterized in that: on the pressure cap Lifting ring be diameter 16mm hold lotus lift ring.