RU2205939C2 - Tool for packer seating - Google Patents

Abstract

FIELD: oil-gas producing industry, particularly, devices for packer seating in well. SUBSTANCE: tool for packer seating has seating nipple combined with tool, body, seat, ball, bushing, cams, spring, spring-loaded bushing. Cams are engageable with seat and spring-loaded bushing. Tool has aligning bushing with through hole. Aligning bushing is locked in body by shear screw. Made in body and bushing are aligning holes. Aligning and spring-loaded bushings and seat are provided with seals. EFFECT: higher seating reliability of packer and simplified its design. 1 dwg

Description

 The invention relates to the oil and gas industry, in particular to devices for installation in the well packer.

 Known check valve model GV-1 (Technical specification of equipment of the United States company "Baker Oil Tools inc.", 1971).

 The equalizing check valve is designed to fit the packer without a water hammer and contains a housing with chevron seals and a steel ball blocking the passage in the saddle, a balancing pipe fixed to the housing with a shear screw, and an upper adapter with a fishing neck.

 The equalizing non-return valve is lowered into the well on a wire or rope, the packer is planted by creating pressure in the tubing, and the valve is also removed from the well with the help of cable technology tools - by the hammer, after cutting the screws and equalizing the pressure on the non-return valve. Therefore, the equalizing check valve allows the packer to be planted without water hammer, which increases the reliability of the packer and the tightness of the packer.

 The main disadvantage is the need to use cable technology.

 The closest technical solution is a tool for planting a packer according to the application for invention 94045568 (with a priority of 12/28/94, with a decision to grant a patent dated 06/26/96).

 The tool for planting the packer contains a housing in which cams are installed in the grooves, interacting with a groove in the landing nipple, an alignment sleeve with pins, which is fixed in the housing with a shear screw, a step sleeve with a spring and grooves for cams and pins. In the housing and the stepped sleeve holes are made to equalize the pressure.

 This tool allows you to create the pressure in the tubing to fit the packer, and after the screw is cut off with a stepped sleeve, the stepped sleeve itself moves down and shifts the leveling sleeve, opening the leveling holes. As a result, the pressure in the tubing before and after the tool is equalized, and the pressure at the wellhead is also reset to zero. Further, liquid is again pumped into the tubing by the pump, the landing tool is released and flies to the bottom, freeing the passage in the tubing.

 Consequently, a decrease in pressure occurs gradually, which eliminates water hammer.

 However, this tool is relatively complex in design, the tool mechanism is located inside the tubing, where it occupies the passage.

 The aim of the invention is to increase the reliability of the landing packer and simplify the design.

 This goal is achieved by the fact that the housing is made with a sleeve, in the grooves of which are placed cams interacting with the seat and the spring-loaded sleeve, and the leveling sleeve is equipped with a through hole, is located between the body, the sleeve and the spring-loaded sleeve and is held by shear screws placed in the housing, in addition , in the housing, at a level above the seat, a hole is made connecting the cavity between the sleeve, the body and the alignment sleeve with the annulus, and the sleeve is provided with two holes, one of which is located It is worn above the saddle, covered by a ball and connecting the inner passage with the cavity between the alignment and the spring loaded bushings, and the other is located below the saddle and the spring loaded bush and connects the inner passage with the cavity between the bush, the housing and the spring loaded bush.

 Analysis of the patent, information and catalog materials found as a result of the search for tools for planting the packer in the funds of the regional universal scientific and technical library in Saratov allows us to conclude that the invention is not known from the prior art, i.e. has an inventive step.

 The design of the proposed tool for landing the packer is caused by the practice of operating such devices, eliminates their main drawbacks and, above all, that allows for shock-free landing of the packer, and the entire mechanism of the tool is placed outside the cavity of the tubing, has a more advanced and reliable design, and in the event of an emergency failure, a sufficiently large passage for gas or oil remains in the saddle (the ball is carried upstream), therefore, the proposed tool has industrial utility.

 The invention is illustrated in the drawing.

 The tool for landing the packer contains a combined with the tool landing nipple 1, body 2, seat 3, ball 4, sleeve 5, cams 6, spring 7, spring sleeve 8, and the cams 6 interact with the seat 3 and spring sleeve 8, the alignment sleeve 9 with a through hole fixed in the housing 2 with a shear screw 10, leveling holes 11 in the housing 2 and 12 in the sleeve 5 and the hole 13 in the sleeve 5 and the hole 14 in the housing 2, seals 15, 16, 17, 18, which are equipped with a leveling 9 and spring-loaded 8 bushings, seal 19 of the bush 5, seal 20 of the saddle 3 .

 Tool for landing packer works as follows.

 The equipment is lowered into the well with the packer landing tool without ball 4. After the equipment with the packer is lowered, ball 4 is thrown into the tubing, which blocks the passage in the seat 3. Using the pump, fluid pressure is created in the tubing, and the packer is planted . With a further increase in pressure due to the pressure from the area of the leveling sleeve 9 through the leveling hole 12, the leveling sleeve 9, tending upwards, cuts off the screw 10 and moves to the stop. The hole 11 in the housing 2 opens, through the through hole in the alignment sleeve 9 and through the equalization hole 12 in the sleeve 5, the liquid from the inner cavity of the tubing enters the annulus, the pressure before and after the seat 3 gradually equalizes. After equalizing the pressure, the spring-loaded sleeve 8 moves up, releases the cams 6, and they get the opportunity to move. Then, using a pump, fluid is pumped into the tubing. Saddle 3, together with ball 4, falls into the face, freeing the passage.

 Thus, when the packer is seated after cutting the screws 10 through the leveling holes 11, pressure equalization occurs, so that no water hammer occurs. This increases the tightness of the packer and tubing. At the same time, cable technology is not required to remove the tool and to free the inner passage of the tubing.

Claims (1)

 A tool for planting a packer comprising a housing with a leveling hole, a ball, a saddle, cams, a spring-loaded sleeve interacting with cams, a leveling sleeve with shear screws, characterized in that the body is made with a sleeve, in the grooves of which are located cams interacting with the saddle and spring-loaded sleeve, and the alignment sleeve is located between the housing, the sleeve and the spring-loaded sleeve, is held by shear screws located in the housing and provided with a seal and a through hole under it, in addition, in the housing A mustache at a level above the seat has a hole connecting the cavity between the sleeve, the housing and the alignment sleeve with the annulus, and an alignment hole located above the seal of the alignment sleeve, and the sleeve is provided with two holes, one of which is located above the seat, overlapped by the ball, and connecting the inner a passage with a cavity between the alignment and spring-loaded bushings, and the other is located below the seat and the spring-loaded bush and connects the internal passage with a cavity between the bush, the housing and the springs sleeve.