I. Overview:

The pipe string of shut-off process is improved on the basis of the problems existing in the temporary plugging process of abandoned wells, often shut-down wells and inter-opening wells in the oil field at present. The product is scientific in design, simple in plugging, and can be used to press wells. Because the tool is installed in the casing, it can effectively prevent the spill of crude oil, avoid pollution, prevent theft and cut. The application of the tool to seal well is only 1/10 of the cost of cement sealing. The cost of traditional well sealing technology is high, cement sealing needs 10 ~ 150000 yuan, and it is easy to damage casing when resuming use, so the risk is very high. When using the tool to seal the well, the operation is simple, safe and reliable, so the tool can be unsealed and put forward as soon as it can be recovered. The use of the well relieves the drilling, washing and so on when cement seal well resumes use. The economic benefit is very obvious.

II. Structural characteristics:

The assembly diagram is as follows:

The main components are as follows: hoop plug, connecting pipe, adjusting joint, connecting sleeve, valve core, kava cone ring, rubber seat, bearing seat, spring and so on.

III. Physical photographs:

IV.Technical parameters:

Table 1 main technical parameters of plugging process string in shut-down wells

V. Scope of application:

It is suitable for temporary plugging technology measures of abandoned wells, often shut-down wells and inter-opening wells.

VI. Usage instructions:

1. Check tools:

Tools must be carefully checked before going down to make sure the tools are in good condition. Check as follows: (1) whether the two ends of the connection thread is intact or not.

(2) there shall be no permanent deformation on the outer surface of the tool after collision.

(3) all anti-release pins shall be tightened and shall not be exposed to the surface of the matrix.

(4) Kawa should be free to move without any blocking phenomenon.

(5) Kava positioning block and vertebral body must be tightened.

(6) the seat sealing mechanism should be commutated flexibly, without any blocking phenomenon.

2. In order to ensure that the pipe string of plugging process is reliable and non-slippery, it is better to scraper the pipe repeatedly in the setting position of the oil well under the tool. The casing coupling position must be avoided in the sealing position of the pipe string in the plugging process of the shut-off well.

3. Seat seal:

When it is necessary to seal the well, the pipe string of the shut-off process is put into the well, the wellhead must be casing coupling, and the center pipe can be moved upward by inserting the special tool into the central pipe. At this time the slip is open, stuck on the inner wall of the casing, the rubber barrel is also compressed, sealed off the oil sleeve ring space. Realize seat seal.

4, unseal:

When you need to unseal the well, first use a special tool to release the pressure inside the well. At this time, there should be a professional security officer on the scene. Then insert the center tube reversal with a special tool to make the center tube move down. The kava sleeve on the center tube pushes down the cone, leaving the card and pulling back, and the rubber tube retracts to realize the unsealing.

Ⅶ. Transport and maintenance consideration

1. Tools out of the factory for the whole factory, use units must not be disassembled, lest after assembly can not reach the original technical performance.

2. The used tools are delivered to the original shipping unit for maintenance to ensure its performance.

3. This product should be transported and stored to avoid collision and rain, both ends of the buckle with wire protection.

4. This product shall be placed on the shelf and shall not overlap. The sun is in the sun. Rain, do not touch acid. Alkali. Salt and other corrosive substances, tools require more than 1 meter away from the heat source.