SU1286753A1 - Well connector - Google Patents

Description

 The invention relates to a technique for transmitting downhole information to the surface via an electrical communication line.

The purpose of the invention is to improve the operational reliability of the device when drilling wells with warped sections of the barrel.

FIG. 1 shows the proposed device, a section on FIG. 2 is a diagram of the location of the contact device on a curved section of the well with a solid pin; in fig. 3 - the same, when performing the pin of the two halves.

The device is placed in a housing located in a cylindrical shell de 2. A housing 3 is installed in the housing 1 with spring elements 4, c. which enters the tip 5 of the contact pin 6, consisting of two halves 7 and 8, run down on the cable 9 inside the string of drill pipe 10. lowered into the well, the barrel 11 of which has (Fig. 2 and H) a curved section. At the ends of the halves 7 and 8 of the contact pin 6, they are fixed through sealing cuffs 12 of the bushings 13, which have axial holes in which there are opposite taper grooves 14 for passing the length of cable 15 electrically connecting tip 5 to the upper part of the contact pin 6, in which behind

five

0

five

0

cable 9 of the communication line is made. The contacting surfaces of the 16 sleeves 13 are made of a spherical shape and. subjected to quenching. In the cable house 2 above the socket 3 there are two guide washers 17 each with an axial hole, the diameter of which is slightly larger than the diameter of the contact pins 6 of the halves 7 and 8, and the holes 18 for the passage of the working fluid. The housing 1 and the washers 17 are clamped with the help of nozzles 19 in the projectile 2 when the guiding device 20 is screwed into it with a sealing ring 21, a stop 22 and openings 23 for the passage of flushing fluid into which the adapter is inserted (not, shown) bottom of the drill pipe string 10. The entire free volume of the body and part of the space above it are filled with a liquid dielectric, which prevents the working fluid from entering the contact area.

The device works as follows.

Upon completion of the assembly and lowering of the drill pipe string 10 into the well, the barrel 11 of which has a curved section, inside the string that received a bend in the indicated well section (Fig. 2 and 3), a contact plug 6 consisting of two halves 7 is lowered on the cable 9. and 8. Go to the curved section of the drill pipe of the drill pipe 10, the pin, unlike its previous performance as a solid construction, when it stuck on this section of the column and did not pass down to the nest 3 (Fig. 2), realizes the possibility of a hinge bending in the desired direction at the point of connection Neny its halves 7 and 8, extends svobono column marked section of drill pipe 10 (Fig. B). Going down to the bottom, it gets into the guiding device 20, the passage through the axial holes of the guide washers 17, joins, bending with its tip 5 springs - more elements 4 with the nest 3, while compressing the spring under the nest (not shown) and lies with its protrusion in the upper part of the limiter 22 of the guiding device 20, forming reliable contact with the downhole equipment electrically connected to the socket 3. The working fluid to the bottom of the drilling process is fed through the drill string 10 through the holes 23 and 18 The guide parts and the window of the housing 1, the direction of the jaw (the washers 1 7, having minimum gaps between their axial holes and the halves 7 and 8 of the contact pin 6 in them, during rotation of the drill string 10 minimize the the transverse vibrations of the halves of the pin and alternating bending loads transmitted to the cable segment 15, taking the maximum values in the absence of washers 17. This increases the reliability of the device and the durability of the pin with the cable passed through it, since tnym significant excesses, uhudihaet insulating material parameters insulation that causes attenuation of lane edavaemyh kabe - lu high-frequency electrical oscillations with encapsulated therein downhole information and reduces the reliability of the device during burrni and premature contact pin failure.

The design of the contact pin of the two halves with the possibility of spatial relative angular bends in the desired direction at the junction of the halves sharply increases

7534

The reliability of the device is ensured by ensuring the free passage of the contact plug through the curved sections of the drill pipe string down to the socket and the subsequent connection (with its connection to the latter).

The implementation in the axial holes of the bushings in the opposite conical grooves prevents damage to the insulation of the length of the cable - contact pin with

the edges of the sleeves and provides spatial freedom in the implementation of the bends of the pin in the necessary directions, which increases the reliability of the device and durability

contact pin

The use of sealing cuffs prevents the penetration of the flushing fluid into both the contact area filled with a liquid dielectric with coupled socket and tip of the contact pin in it, as well as the upper part of the latter, in which the cable is connected, which increases reliability

device operation in the process of drilling.

Claims (1)

Invention Formula Downhole contact device containing a cylindrical projectile, in which the body with a socket, filled with a liquid dielectric, is mounted in the upper part of the projectile. the guiding device and the contact pin, which is lowered inside the drill pipe string on the cable for mating with the socket, are so that, in order to increase the operational reliability devices for drilling wells with curved sections of the barrel, it is equipped with two guide washers, the contact pin is made of two halves, each of which has sleeves and sealing cuffs, while the sleeves are fixed at the ends of the connecting halves of the pin opposite one another, the contacting surfaces are made spherical shape, in axial bore x sleeves Conical grooves are made oppositely, and they themselves are fastened in the adjoining halves of the pin through the sealing cuffs, and the guide washers are installed in the window above the nest - in the places of the sleeves. FIG. 2 Fig.Z