SU1234572A1 - Apparatus for holding drilling string - Google Patents

Description

The invention relates to the drilling of wells, namely, installations for the retention of the drill string.

The aim of the invention is to improve the reliability of the device by eliminating the possibility of its opening while holding the column.

FIG. 1 shows the device, general view; in fig. 2, section A-A in FIG. one; in fig. 3 — node 1 in FIG. one.

The device consists of a base 1, which is suspended for vertical unresponsiveness on ring 2, ring ring 3, in the radial bores of which plates are mounted 4. Plunger hydraulic cylinders 5 are fixed at the lower ends of ring 2, the rods of which serve as a support of ring clip 3. A clamping ring 7 is suspended on the base 1 on the rods of the hydraulic cylinders 6, on the radial guides 8 of which there are slides 9 connected to the clamping ring 7 through the hydraulic cylinders 10, and to the lash 4 by means of inclined lines 11 11.

Bottom on the plates 4 are made transverse grooves 12 under the stops 13, mounted on the tides of the base 1. Nlapki 4 on the working side are made in the form of a step, the vertical walls of which are made with a notch, and the bottom bearing plane 14 is a support for the end of the drill string coupling 15.

The device works as follows.

In the initial position, the clamping ring 7 with hydraulic cylinders 10 and onynieno slides 9 downward through hydraulic cylinders b, connected to the base 1. Ring-holder 3 with rafts 4 lifted upwards and at

to the base 1 by means of plunger hydraulic cylinders 5.

Slides 9 and associated slopes with guides 11 plates 4 are shifted by hydraulic cylinders 10 to the rear position (from the center).

During the movement of the drill string 15, at the approach of its coupling to the holding device, a command to stop is sent, and the drilling string 15 stops so that the end of the coupling is higher than the nylon 4. The working fluid is fed into the hydraulic cylinder:) 1 10, which move the sliders 9 but radially .m guides 8 to the center. The sliders 9 act on the plates 4 and apply them to the surface of the drill string 15. The resulting reactive force, acting through the plates 4 on the sliders 9, creates an overturning moment that the sliders 9 slide on the radial guides 8. They give the command to snore the drill the column 15, which, lowering, sits on the end face of the coupling on the supporting planes 14 plan1 sec 4, at this ring-about 3, together with the dies 4 under the action of the weight of the drill string 15 is lowered, plunger hydraulic cylinders 5, and the stops 3 inlet t in transverse grooves 12 4. Serve ra The barrel fluid in 1 isotrocilia 6, the clamping ring 7 with the sliders 9 rises and the vertical drill string 15 occurs vertically; the walls 4.

Ilpi-i loss l1, avenues in a hydraulic system or an O1 team working from the control panel n; ianiKH 4 will not be able to disperse, since they are held by stops until the drill bit 15 is in the device.

Editor N. Gorvat Order 2695/38

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

.З

Compiled by E. Stolbtsov

Tehred I. VeresKorrektor I. Muska

Circulation 548 Subscription

Claims (1)

DEVICE FOR RETAINING A DRILLING COLUMN, including a base, a ring ring with dies and a clamping ring with sliders for interacting with dies, characterized in that, in order to increase the reliability of the device by eliminating the possibility of its opening when holding the column, the base is equipped with stops and rods with plunger hydraulic cylinders for interaction with the cage ring, while the dies have grooves to accommodate the stops. Figure 1