CN104481426A - Operation well anti-top and anti-channeling device - Google Patents

Abstract

The invention relates to an anti-roof and anti-channeling device for an operation well. The utility model mainly solves the problem that the pipe column jumps up and down in the existing minor repair construction and cannot be handled. It is characterized in that: the safety slip includes a safety slip shell (1), and two slips (2) are built inside the safety slip shell (1), and the two sides of the two slips (2) are respectively A lead screw (5) is connected; the main body of the anti-channeling device includes a lifting hydraulic cylinder (16), and the bottom of the lifting hydraulic cylinder (16) is connected to a fixed hydraulic pipe clamp (17) through a connecting seat (18), and the top A lifting hydraulic pipe clamp (15) is connected through the connecting seat (18). The anti-roofing and anti-channeling device of the operation well removes the restriction of the steel wire rope on the upper space of the wellhead, and at the same time controls the whole process of lifting and lowering the pipe string, so as to realize the purpose of anti-topping and anti-channeling, and speed-limited lifting.

Description

Operation well anti-top and anti-channeling device

technical field

The invention relates to the field of oil fields, in particular to an anti-roofing and anti-channeling device for operating wells.

Background technique

At present, in the oil field, after the phenomenon of pipe strings running up and down during minor repair operations, the construction team generally uses blowout preventers or steel wire ropes to control the pipe strings, and uses tank trucks to pull and release the pressure. After the pressure is reduced, the next step of construction is carried out way of processing. However, there are the following problems in the process of processing: first, the time for tank trucks to transport and release pressure is uncertain, and the time for invalid lying in the well is prolonged, and the operation team cannot move, which affects the construction efficiency; second, some abnormal high-pressure wells in non-high-risk areas need to rush to install anti The third is that the main function of the single ram manual blowout preventer commonly used in minor repair operations is to prevent blowout. Although it can control the pipe string to a certain extent, it has potential safety hazards; the fourth is the wire rope The control method of the reverse wellhead has potential safety hazards, and at the same time, the upper space of the wellhead is limited, and other equipment cannot be installed. Therefore, it is difficult for the current prior art to fundamentally solve the problem of running up and down the top of the pipe string that occurs during the construction process.

Contents of the invention

In order to overcome the inadequacy of the existing minor maintenance construction, which cannot be dealt with when the pipe string goes up and down, the invention provides an operation well anti-roof and anti-channel device. At the same time, it controls the whole process of lifting and lowering the pipe string, so as to realize the purpose of preventing jacking and channeling, and speed-limited lifting.

The technical solution of the present invention is: an anti-roofing and anti-channeling device for an operation well, including a safety slip and a main body of the anti-channeling device, the safety slip includes a safety slip shell, and two Slips, the two sides of the two slips are respectively connected with lead screws; the main body of the anti-channeling device includes a lifting hydraulic cylinder, the bottom of the lifting hydraulic cylinder is connected to a fixed hydraulic pipe clamp through a connecting seat, and the top is connected to There is a lifting hydraulic card tube.

The fixed hydraulic pipe clamp includes a slip housing, the slip housing is connected with a slip seat, and the slip seat is equipped with a slip; the lifting hydraulic cylinder includes a cylinder barrel, a piston rod , the cylinder is fixed on the connecting seat, the cylinder is equipped with a piston rod, the upper part of the piston rod is connected with the oil cylinder head, and the upper part of the oil cylinder head is connected with the lifting hydraulic pipe clamp through the upper cylinder cap.

The present invention has the following beneficial effects: due to the adoption of the above scheme, the pipe string is controlled by the safety slip instead of the steel wire rope, the restriction of the emergency control wire on the upper space of the wellhead is removed, and it is convenient to use other equipment to control the pipe string. At the same time, the main body of the anti-top and anti-channeling device can drive the pipe string to run up and down, so as to realize the lifting or lowering of the pipe string. The whole process of lifting and lowering the pipe string of the device is controlled by hydraulic pressure, which is safe and reliable, and solves the problem of pipe string running up and down during the construction process.

Description of drawings

Fig. 1 is the structural representation of safety slip in the present invention;

Fig. 2 is a schematic structural view of the main body of the anti-channeling device in the present invention.

In the figure 1-safety slip shell, 2-safety slip, 3-screw, 4-baffle, 5-lead screw, 6-bolt, 7-slip shell, 8-slip, 9-slip Seat, 10-slider, 11-cylinder barrel, 12-piston rod, 13-oil cylinder head, 14-upper cylinder cap, 15-lifting hydraulic clamp, 16-lifting hydraulic cylinder, 17-fixed hydraulic clamping tube device, 18-connector.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1 and Fig. 2, an anti-roof and anti-channeling device for an operation well includes safety slips and a main body of the anti-channeling device. The main body of the anti-channeling device is connected to the upper part of the safety slips by bolts, and the safety slips are fixed on the wellhead. The safety slip includes two safety slip shells 1, and the two safety slip shells 1 are combined into a circular ring. There are several round holes in the vertical direction on the shell, and the bolts pass through the round holes and the upper part. The main body of the anti-channeling device and the lower wellhead are connected. There are two slips 2 inside the safety slip shell 1, and the inner sides of the two slips 2 have clamping teeth, and the pipe column is clamped by the clamping teeth, and the two sides of the two slips 2 are respectively connected with lead screws 5, through Turning the lead screw 5 can make the slips 2 move inward or outward, thereby clamping or loosening the pipe string.

The main body of the anti-channeling device includes a lifting hydraulic cylinder 16, the bottom of the lifting hydraulic cylinder 16 is connected to a fixed hydraulic pipe clamp 17 through a connecting seat 18, and the top is connected to a lifting hydraulic pipe clamping device 15 through a connecting seat 18. The fixed hydraulic pipe clamp 17 includes a slip housing 7, the slip housing 7 is internally connected with a slip seat 9, the slip seat 8 is internally provided with a slip 8, and the slip seat 8 is connected with an oil cylinder , the movement of the slip seat 8 can be controlled through the expansion and contraction of the oil cylinder piston, thereby driving the slip 8 to move. The lifting hydraulic cylinder 16 includes a cylinder barrel 11 and a piston rod 12 , and the cylinder barrel 11 is fixed on a connecting seat 18 so as to connect the lifting hydraulic cylinder 16 and the fixed hydraulic pipe clamp 17 together. A piston rod 12 is arranged inside the cylinder barrel 11, a slide block 10 is arranged outside the lower part of the piston rod 12, and an oil cylinder cover 13 is connected to the upper part of the piston rod 12, and the upper part of the oil cylinder cover 13 is connected to the lifting hydraulic pipe clamp 15 through the upper cylinder cap 14, thereby Connect the piston rod 12 with the lifting hydraulic pipe clamp 15.

When carrying out the upper and upper channeling treatment, first pass the safety slip between the two fixed steel wires of the upper channeling string, and connect it to the wellhead flange, and take over the steel wire rope to control the string, providing conditions for the next step of processing . Secondly, hoist the anti-top and anti-channeling main body on the safety slips, and connect them through bolts. The pipe string in the well passes through the lifting hydraulic pipe clamp 15 and the fixed hydraulic pipe clamp 17, and closes the lifting hydraulic pipe clamp 15 to hold it tightly. The pipe string, the fixed hydraulic pipe clamp 17 is in the open state, and now the pipe string in the well can run up and down with the piston rod 12 of the lifting hydraulic cylinder 16. When the piston rod 12 runs to the end of the stroke, close the fixed hydraulic clamp 17, open the lifting hydraulic clamp 15, the piston rod 12 can run to the other end with no stroke, close the lifting hydraulic clamp 15, and open the fixed hydraulic clamp 15. The pipe clamp 17 can carry out the action of lifting or lowering the pipe string in the next cycle, so as to realize the hydraulic control operation of the whole process of lifting and lowering the pipe string.

The safety slips and the main body of the anti-channeling device of the working well anti-roofing device can also be used separately. For example, after the emergency control steel wire is used to release the restriction on the upper space of the wellhead by using the safety slip, if the downhole pressure is too high, the pressure operation process can be used for the next step; the main body of the anti-channeling device can also be used alone for mechanical water plugging, For high-risk operations such as long shut-in and unsealing of wells, the whole hydraulic control operation is carried out.

Claims (2)

1. An anti-roof and anti-channeling device for an operation well, including a safety slip and a main body of the anti-channeling device, characterized in that: the safety slip includes a safety slip shell (1), a safety slip shell (1) There are two slips (2) inside, and the two sides of the two slips (2) are respectively connected with lead screws (5); the main body of the anti-channeling device includes a lifting hydraulic cylinder (16), and the lifting hydraulic cylinder (16) The bottom is connected to the fixed hydraulic pipe clamp (17) through the connection seat (18), and the top is connected to the lifting hydraulic pipe clamp (15) through the connection seat (18). 2. The operation well anti-roof and anti-channeling device according to claim, characterized in that: the fixed hydraulic pipe clamp (17) includes a slip housing (7), and the slip housing (7) A slip seat (9) is connected inside, and a slip (8) is built inside the slip seat (8); the lifting hydraulic cylinder (16) includes a cylinder barrel (11), a piston rod (12), and the The cylinder (11) is fixed on the connecting seat (18), the cylinder (11) is equipped with a piston rod (12), the upper part of the piston rod (12) is connected with the cylinder head (13), and the upper part of the cylinder head (13) passes through The upper cylinder cap (14) is connected with the lifting hydraulic pipe clamp (15).