SU1640328A1 - Deflecting tool - Google Patents

Description

The invention relates to a drilling technique, namely to drilling inclined directional wells with projectiles with a removable core receiver.

The purpose of the invention is to increase the reliability of the projectile in operation.

Figure 1 shows a deflecting projectile in a transport position; on ibisr.2 - it is working position.

The deflecting projectile includes a core pipe 1 with a crown 2, a guide rod 3 with a spherical bearing surface A, an eccentric weight 5, a fixing element 6 of the guide rod 3, a cam clutch 7. The guide rod 3 is connected with a column pipe 1 of the clamps 8 from easily drilled material. The locking element 6 is made in the form of a socket with rock-breaking elements 9 at the lower end. To ensure the screw movement of the locking element 6, spiral grooves are made on the outer surface of the guide rod 3, and the fixing element 6 is rigidly fixed to the fixture 1 Eccentric weight 5 in the upper part has a head 11 under overshoot (not shown). A support washer 12 made of an elastic material is installed in the core tube 1.

The diverting projectile operates as follows.

If necessary, change nap. To remove the hole from the core pipe f, remove the core tube (not shown). Column pipe Lift above the borehole 2-3 m.

The eccentric weight 5 and the guide rod 3 connected with it through the cam sleeve 7 are delivered to the strips of the core pipe 1 by an overshot mechanism. The system eccentric weight - the guide 1FL is installed by the spherical support surface 4 on the support washer 12 of elastic mother

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Claims (1)

teriala. Due to the eccentric weight 5, the guide rod 3 is set to a predetermined position. In this case, the locking element 6 is in its lowest position. The guide rod 3 is fixed relative to the crown 2 by the clamps 8. The core pipe 1 is lowered until the fixing element 6 is installed with rock-breaking elements 9 on the bottom hole. Thereafter, flushing fluid is supplied to the cavity of the drill pipes and the column pipe 1 is continued to lower. Due to the interaction of the nut 10 with the helical grooves of the guide rod 3, the locking element 6 rotates. Lowering and raising the core pipe 1 to the stroke length of the guide rod 3, the cavity is formed downhole to accommodate the locking element 6. After the latter is fixed, the core pipe 1 is rotated to the bottom of the well and the hole 8 is drilled with a crown 2. In this case, the crown 2, moving along the guiding rod 3, destroys the wall of the wellbore mainly in the direction of its skew. After completion of the borehole curvature, the column pipe 1 is raised above the bottom. A hole is lowered into the cavity of the drill pipe, and an eccentric weight 5 is removed along with the head 11 along with the guide rod 3 and the locking element 6. Invention formula A deflecting projectile, including a core pipe with a crown, placed in its cavity with the possibility of rotation and axial movement, a guide rod with a supporting spherical surface on the upper part and a fixing element at the lower end, located in the lower part of the core cb / jp 2. Compiled by V.Rodina Editor T. Yurchikova Tehred M. Didyk Proofreader T. Malets Order 12b9 Circulation 381Subscription VNIIPI State Committee for Inventions and Discoveries of the Third SCST of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab.