SU735755A1 - Indicator of curving direction of inclined boreholes - Google Patents

Description

(54) DIRECTION INDICATOR FOR CURVING TILTING WELLS.

The invention relates to drilling and can be used to determine the direction of the artificial or natural curves of deviated wells. Devices for measuring the zenith and azimuthal angles of wells are known, which include a power source, a relay, a switch, an extension cable, an apsidal crank, a catch, and a sensing element 1. However, this device is relatively difficult to manufacture and operate, and, moreover, it does not allow measurements to be made to the well at small curved sections of the splint sections. Known indicator installed in the string of drill pipe, containing # 8 unbalanced rods, rigidly connected to the seal, needles to. The new set, {2J. The principle of operation of this device is the pc on receiving a print of knives on a seal occupying a certain position relative to the apsidal plane of the well. The indicated device is simple and makes it possible to orient the deflectors with permissible accuracy, but it does not allow to transform the increment of the obtained angle of curvature; in linear displacement, which makes it impossible to determine the direction of curvature of the SQUARISHANE. The purpose of the invention is to reduce tripping by reducing inclinometric measurements. This is achieved by the fact that the proposed indicator is provided with a hinge, which is rigidly connected from one side to the drill string and, on the other hand, to a core set, moreover, a needle is installed in the cavity of the hinge, the tip of which is facing the drill string. . . Fig, 1 shows the proposed; indicator, general view; Fig, 2 is the same, after the descent into the well; in fig. 3 - limb device,. The curvature indicator contains two main nodes — a hinge and an unbalance rod. The articulated adapter is designed to eliminate stress concentrations in the drill string and form a sharp bias of the column set relative to the drill, as well as to transform this bias into a linear magnitude. The articulated adapter contains a nip pel 1, which is threadedly connected to the yoke 2, which mixes the upper part of the shank 3. Freely insert the fingers 4 in the corresponding grooves of the edge of the shank 2 and shank 3, which prevent mutual turning of these parts. At the same time, there are gaps between the mating surfaces of the upper part of the shank 3, the shafts 2 and the finger 4, which allow to shift the lower part of the shank relative to i; eEieftta Ai i - -4--.- ™ - ----- .-. ..--. - ..-, -. .... ..,.,four,,-, . the central axis of the nipple 1 within the specified limits (at an angle of 3-5). To eliminate fluid leakage from the central channel of the articulated adapter, the mating parts of the nipple 1 and their shank 3 have a corresponding bore into which Lena is firmly inserted into an elastic tube 5. At the bottom of the shank 3 there is a coaxially installed sleeve b with a needle 7 fixed on it. the central channels of the nipple 1. and the stem 3, the upper end of the needle is located on the central axis of the nipple 1.. When the lower end of the shank 3 is displaced to one or another side relative to the axis of the nipple 1, the upper end of the needle will shift to the opposite side. using a thread shank 3 soy di Price with a hinge 8, which can be screwed column tube. The unbalance rod is intended for detecting the needle position relative to the apsidal plane of the tilt of the well and consists of an unbalanced rod 9, which has a housing in the bottom, in which the plate 10 is installed, of a relatively soft material (aluminum, lead, clay, tar and etc.) The turn of the rod 9 is connected to an elastic wire or cord 11. Due to the fact that the center of gravity of the rod with its inclined position will always be located below the central axis And in; apsidal plane with, then the seal will be in a certain position. The articulated adapter is part of the drilling rig between the drill string and the core tube and is located in the borehole during the entire flight. The rod is lowered into the drill bit only for the period of measurements that are made at the beginning, middle, or end of the voyage. The principle of the indicator of the curvature of the ULOMY lies in the following VDem7 ----------- - - - -After the art of the curvature is performed, the drill is lowered into the well, which includes a pivot adapter. Snar d Pose

Claims (2)

735755. BcUOT over the bottomhole so that the sampling column kit 12, together with the rock-cutting tool 13, is located in the curved section of the well, and the nipple 1 connected to the drill string 14 is located at. non-curved part of the well. With this arrangement of the drill string, due to the rigid connection of the lower part of the articulated adapter with the core set, the upper end of the needle will be shifted from. The central axis of the nipple 1 in the direction opposite to the artificial curvature. This position of the needle is recorded by a seal lowered on the flexible wire or twine inside the drill string. At the time of installation, print the debalance rod on the needle to take a certain position (the side notch is located on the side of the inclined borehole wall), and a funnel-shaped recess is formed on the bottom surface of the plate 10 (imprint, the position of which is artificially determined relative to the apsidal plane of the well). curvature). If necessary, the magnitude of the increment of the angle can be calculated by the magnitude of the linear displacement of the print from the central axis of the rod. In order to obtain more accurate data on the direction of curvature, the interpretation of printing indications can be carried out using a limb device which contains a limb bushing 15, where it is reinforced with the possibility of: - turning 360 ° of the intermediate bushing 16. An arrow 17 is installed in the slots of the upper part of the intermediate bushing 16. In the side wall of the limb bushing 15 there is a thread in which the screw 18 is located. To carry out the interpretation of the print readings, the limb device bops on the lower part of the debalance rod 9, combine the zero case limb, so that at the lower position of the unbalanced part of the rod it is in the upper position, i.e. the zero position of the limb and the center of gravity of the unbalanced print part must be located in opposite directions. In this position, the limb device is fixed on the unbalanced 9 with the screw 18. After that, turning the intermediate sleeve 16 relative to the rod and the limb sleeve, set the arrow so that its tail part is positioned over the print, closed on the print or (for a wide print ) passed through its middle. The second end of the arrow 17 then reads the readings in degrees. . . . 7 If necessary, measurements of the curvature direction in the same flight can be carried out repeatedly (for example, at the beginning, in the middle and at the end of the voyage), which makes it possible to follow the curvature of the well and take appropriate measures in time. To reduce the time spent on the work, several measurements can be carried out at one rod descent. Before drilling, the drill string is suspended at a certain depth of the well before lifting the workpiece and putting a print on it by printing and lowering the rod. To distinguish, each print (depending on the depth of the borehole) must have a different depth and width, which can be obtained due to the force of the impact rod on the needle torus (for example, when the rod falls at different fixed heights). The proposed indicator will allow obtaining information on the well curvature at the first stage of work on the artificial curvature of the well, even with its minimum deepening. This will make it possible in case of unsatisfactory results of the curvature to eliminate the time spent on the elimination of the defect and thereby reduce the amount of drilling. As a result of the use of the invention, drilling performance will increase and their cost will decrease. Claims of direction of curvature of inclined wells installed in a string of drill pipe, containing an unbalanced rod rigidly connected to the seal, a needle and a column set, characterized in that, in order to reduce tripping operations by reducing inclinometer measurements, it is equipped with a hinge, which is rigidly connected on one side to the drill string, and on the other hand from the columns set, and in the cavity of the hinge coaxially with the needle installed needle, the tip of which is facing the column | drill pipe. Sources of information that are taken into account during the examination ° A.I Blinov and others. Reference book on diamond drilling in exploration wells. L. Nedra, 1975, p. 281-283. 2. Kalinin, A.G., et al. Orientation of diverting systems in the wells of M., Gostoptekhizdat, 1963, p. 54-55, (prototype).