SU989038A1 - Apparatus for repairing casings - Google Patents

Abstract

The invention relates to the installation of longitudinally corrugated patches of metal pipes in the casing of 1X columns of oil, gas and water wells to restore the tightness of the walls of the columns. The purpose is to improve the reliability of casing repair. The invention fires to (devices, we use 1M for installing pro- long-corrugated metal pipe patches in casing strings of oil, gas and water wells to restore the tightness of the walls of columns. The purpose of the invention is to expand reliability of casing column repair by providing non-contact; deformation of the plaster with a cone-punch .. Fig. 1 shows the device in the transport position, general view; - SHYSH-1 VI LIOTEKL. none of the non-contact deformation of a plaster by a cone - a puncture. The device contains successively located forming head 1 and a cone-punch 2 with longitudinal grooves, located on it a plaster 5 with longitudinal corrugations arranged in longitudinal grooves. The latter are made with variable radius increasing from a smaller base of the cone-punch to a large one. The angle of inclination of the Generating grooves of the upper part of the cone of the punch is 35-40, This angle of inclination greatly affects the quality of expansion of the adhesive and axial force of passage of the cone-punch. Pressing the plaster to the walls of the casing pipe is real (Late head 1. When the plaster expands with a smooth cone with a lift angle of 9-12 in diameter, the flow diameter corresponds to the diameter of the cone-punch. 6 ill. From 00 x o in FIG. 2 - the same , in working position; Fig. 3-5 shows the stages of straightening a corrugated plaster; Fig. 6: cone-punch, incision. Casing repair device; tube contains forming elastic head 1, rigid cone-punch 2 with longitudinal grooves and hollow rod 3. The device is lowered into the well to the place of violation Columns on tubing: or drill pipes 4 together with a metal plaster 5 with longitudinal corrugations, which one end rests on a cone-puan

Description

UNION OF SOVIET SOCIALIST REPUBLICS

Instead of the previously published "SU ,,,, 989038 At" 1) 5, Е 21 В 29 / .10 __________ '.

STATE COMMITTEE

BY INVENTIONS AND DISCOVERIES UNDER THE GNNT OF THE USSR

DESCRIPTION OF THE INVENTION · * "-." Gv'am rvjevkysh I

TO COPYRIGHT T

(21) 3325060 / 23-03 (22) 11.08.87 (46) 06/23/90. Bull. No. 23 (71) All-Union Research Institute for Wells and Drilling Muds (72) A.T. Yarysh, M.L. Kiselman and S.F. Petrov (53) 622.245.4 (088.8) (56) Copyright certificate USSR 1? 377650, cl. E 21 B 43/10, 1970.

Homco steel casing tubing Patch operator’s manual, .3 / 15/73, c. 63.

(54) DEVICE FOR REPAIRING A Casing.

(57) The invention relates to the installation of longitudinally-corrugated metal pipe adhesives in casing strings of oil, gas and water wells to restore tightness of the wall of the strings. The goal is to increase the reliability of casing repair

The invention relates to | Uetroyst- ^G , used when installing longitudinally corrugated plasters from metal pipes in casing strings of oil, gas and water wells to restore the tightness of the walls of the columns.

The aim of the invention is to expand the reliability of casing repair by providing non-contact deformation of the patch with a cone-punch.

In Fig. 1, the device is shown in the transport position, general view;

They are due to the provision of non-contact deformation of the patch with a cone - punch. The device contains sequentially located the forming elastic head 1 and the cone-punch 2 with longitudinal grooves, a patch 5 located on it with longitudinal corrugations located in the longitudinal grooves. The latter are made with a variable radius increasing from a smaller base of a punch cone to a large one. The angle of inclination of the forming grooves the larger base of the cone-punch is 35-40 °. This angle of inclination significantly affects the quality of expansion of the patch and the axial force of passage of the cone-punch. Pressing the plaster to the walls of the casing is carried out by head 1. When expanding the plaster with a smooth cone with an angle of rise of 9–12 ° through passage, the diameter corresponds to the diameter of the punch cone. 6 ill.

in Fig.2 - the same in the working position; on Fig, 3-5 - the stages of straightening the corrugated patch; 6, cone-punch, section.

Casing repair device. the pipe contains a forming elastic head 1, a rigid cone-punch 2 with longitudinal grooves and a hollow rod

3. The device descends into the well to the place of violation of the column to the pump

CO 00 co about io X

but-compressor or drill pipes 4 together with a metal plaster 5 with longitudinal corrugations, which. one end rests on the cone-point 3 sleep z, from axial movement upward is held by the stop 6, and its corrugations are placed in the longitudinal grooves of the cone-punch,

The rigid cone-punch-2 is a truncated cone (see,.. Fig. 6), on the lateral surface of which longitudinal radial grooves are made according to the number of corrugations of the patch 5, The angle of inclination of the forming grooves 7, comprising 9-12 °, increases up to 35-40 ° at the larger base of the cone. The radius of the grooves is variable, at the smaller base (FIG. 3), the configuration of which follows the inner contour of the patch, it is equal to the radius of the corrugations of the patch, and then increases. For example, for a punch cone used to repair 146 mm casing jq columns, the radius of the grooves at the smaller base (Fig. 3) is 11 mm, in the middle section '(Fig. 4) - 16 mm, at the larger base of the cone - 28 mm (FIG. 5). 25

Installation of the patch in the column of siege pipes is carried out by pulling through it a rigid cone-punch 2 and the forming head 1 (Fig, 2),

At the beginning, in the unsupported (Fig. 3) and partially in the reference (Fig. 4,5) expansion mode (when the protrusions of the patch 5 begin to lean against the wall of the casing 8), the expansion of the patch with a cone occurs at an angle of elevation of the generatrix of the grooves in 9- 12 ° (see, FIG. 6), Corrugations of $ 5 patch · 5 in this case fit snugly into the grooves of the punch cone 2, Their contact is in normal section to the stroke of the punch cone. 2 in the process of deformation of the corrugations, due to the variable radius of the grooves 7, all the time it goes along the arc (em, figs, 3, 4 and 5) without backward bending of the metal, which prevents the formation of overburden. Then, the section of the cone on which the head of the generatrix

The grooves increase to 35–40, the corrugations of the patch ⁵ , controlled by ^{1 of} this section, sharply rotate and break the contact with the cone-punch 2 at this angle (see, 50, FIG. 6).

/ tyr 5 due to the angle of rotation of the generatrix of the grooves by 35-40 ° and the action of the elastic forces of the compressed section of the patch, the final pressing of the patch to the walls of the casing 8 is carried out by the elastic forming head 1, It was experimentally established that the angle of elevation of the generatrix of the grooves 7 of the cat · punch significantly affects the quality of expansion of the patch and the axial force of passage of the cone-punch, the angle of rise of the generatrix of less than 35 ° does not give or gives a slight increase in the bore diameter of the patch, and the angle; raising the generatrix more than 40 ° leads to a significant increase in the necessary axial forces for the passage of the cone-punch and the deterioration of the quality of expansion.

When the angle of elevation of the generatrix of the cone grooves is 35-40 °, after expanding the patch with a cone-punch, the passage diameter increases with respect to the cone diameter by 6-7 mm and 146 and up to 8-9 mm in 168 mm casing. smooth cone with an angle of elevation forming 9-12 ° passage diameter corresponds to the diameter of the cone-punch.

Claims (1)

sleep /: the axial movement of the nnerch is supported by the stop 6, and its corrugations are placed on the longitudinal grooves of the cone-punch, -Hard cone-punch 2 is a truncated cone (see .., 4ig, 6), on the side surface the longitudinal radius grooves are made according to the number of corrugations of the plaster 5, the angle of inclination of the grooves 7, which is 9-12 °, increases to 35-40 at the larger base of the cone-pusan. The radius of the grooves is variable, At the smaller base (Fig, 3) | the configuration of which repeats the inner contour of the plaster, it is equal to the radius of the corrugation of the plaster, and then increases, for example, the dp of the cone-punch used to repair 146 mm casing, the radius of the grooves at the smaller base (Fig 3) is P mm, middle section (fig. 4) - 16 mm, at the larger base of the cone - 28 mm (fig. 5). Installing the patch in the column of siege pipes is carried out by drawing through it a rigid cone-punch 2 and the forming head 1 ( FIG. 2 At the beginning. In the support-free (FIG. 3) and partly in the reference mode (FIG. 4, 5) is extended. and (when the plaster 5 begins to lean against the wall of the casing 8, the plaster expands with a cone when the angle of rise forms 9-12 grooves (see, FIG. 6), the corrugations of the plaster-5 are tightly attached to the grooves of the cone-punch 2, Their contact is in the normal section to the course of the cone of the punch 2 in the process of deformation of the corrugation, due to the variable radius of the grooves 7, all the time goes along the arc (cm, 1ig, 3, 4 and 5) without reverse bending of the metal, which prevents the formation of incoherent. Then, in the process of expansion of the valleys, a part of the cone is included, on which the ant forming age is 35-40, the corrugations of the plate 5, which are controlled by this section, sharply rotate and cone with the cone 2 to make contact with the cone 2 (see FIG. 6) A further movement of the cone-puson 2 leads to the appearance of non-contact expansion of the troughs, tf 5, due to the angle of rotation of the forming grooves by 35-40 and the action of the elastic forces of the compressed patch. The final pressing of the plaster against the walls of the casing 8 is carried out by an elastic forming head 1. It has been experimentally established that the angle of elevation of the forming grooves 7 of the co-tunus-punch significantly affects the quality of expansion of the plaster and the axial force of the cone-punch, passing the angle of elevation of less than 35 mm. gives or gives a slight increase in the diameter of the patch, and the angle of elevation of the generatrix of more than 40 leads to a significant increase in the number of axial efforts for the passage of the cone-punch and deterioration extensions. When the angle of elevation of the forming cone grooves is 35-40, after expansion of the plaster with a cone-punch, the through diameter increases with respect to the diameter of the cone by 6-7 mm and 146 and up to 8-9 mm n 168 mm of casing pipes. a cone with a lift angle of 9-12 in diameter through passage diameter corresponds to the diameter of the cone-punch. Claims An apparatus for repairing a casing, comprising successively arranged elastic head and a cone-punch with longitudinal grooves, has a patch on it with longitudinal corrugations placed in the longitudinal grooves of the cone-punch, characterized in that, in order to increase the reliability of repair casing due to the non-contact deformation of the plaster with a cone-punch, (the longitudinal grooves of the cone-punch are made with a variable radius increasing from a smaller base cone-punch to a larger, and the angle of inclination of generators have larger base of the cone punch-35-40. eight Fig.Z