CN203081426U - Horizontal Well Logging Safety Cable Head - Google Patents

Abstract

A horizontal well logging safety cable head is applied to oil field horizontal well safety logging. Is characterized in that: the cone at the upper end of the rope cap is provided with an axial center hole; a stepped central hole is arranged in the rope cap, an armor cone with a stepped cylindrical outer wall is arranged in the upper top of the stepped central hole of the rope cap, and an armor three-piece set is arranged in the armor cone; the wall of the rope cap is uniformly distributed with screws in the circumferential direction, and the inner ends of the screws are arranged on the outer wall of the upper end of the armored cone; a connecting cylinder is arranged in a central hole at the lower end of the rope cap; shear pins are uniformly distributed in the annular groove of the rope cap, and the inner ends of the shear pins are respectively riveted into pin holes in the outer wall of the connecting cylinder; a transverse partition wall is arranged at the lower end of the central hole of the connecting cylinder, a central hole is formed in the transverse partition wall of the connecting cylinder, and a single-core sealing column is fixed in the central hole of the transverse partition wall of the connecting cylinder. The effect is as follows: the horizontal well testing device can be connected with a horizontal well testing instrument, is used for horizontal well testing, is safe and reliable, can stably transmit logging parameters, and bears cable tension and bottom hole pressure.

Description

Horizontal Well Logging Safety Cable Head

technical field

The utility model relates to the technical field of oilfield horizontal well logging, in particular to a horizontal well logging safety cable head. the

Background technique

At present, in deep well exploration, especially in oil well logging, there are two ways to connect the steel wire cable head to the downhole instrument: one is to directly connect to the downhole instrument. During well logging, due to the tension of the steel wire, the downhole The downhole rotation affects the logging parameters; the other is connected by a rotatable cable adapter. When logging, the downhole tool does not rotate and the wire cable rotates, thereby reducing the impact of tool rotation on the logging parameters. Due to the harsh underground environment and high pressure and temperature, there are strict requirements on the electrical and mechanical properties of the cable head. the

Chinese patent announcement number: CN201851028U, which provides a "cable head for connecting well logging cables and downhole instruments", which relates to the technical field of cable connectors, including a tension rod unit, and an instrument interface unit connected to one end of the tension rod unit, The other end of the tension rod unit is connected with a fishing head unit, and the fishing head unit includes a fishing head, a fast torpedo assembly and a cone spring rubber head, and a through hole is arranged on the fishing head, and the fast torpedo assembly and the cone spring rubber head It is installed on the fishing head through the through hole, the size of the upper end of the fishing head matches the slip type fishing tool, and the lower end of the fishing head is connected with the tension rod unit through the shear screw. The utility model solves the technical problem that the downhole instrument cannot be salvaged with fishing tools when the instrument is stuck, and at the same time, it also solves the technical problems that the existing cable head has no shear weak point design, cumbersome maintenance and easy damage to the tail of the cable head . the

Chinese patent announcement number: CN2256035, provides a kind of "oilfield production logging cable head", which adopts an integrated outer cylinder on the cable head with a diameter of 28mm, and the fixing of the outer cylinder and the sealing head adopts three common chord pins evenly distributed The outer cylinder is covered with a sheath with an outer diameter of 38mm and threaded on the butt cap, and the butt cap is also connected with a butt sleeve with an outer diameter of 38mm; the cable head can be connected to a logging tool with a diameter of 28 (or 38) mm. There is an annular cavity in the outer cylinder where the armor wire is inlaid, and a rotatable armor wire cap is inserted. At one end of the armor wire cap, there are several evenly distributed grooves for the armor wire inlaid in the horn system, and a locking sleeve and a locking cap to form a convenient Fixed stand-alone. the

Utility model content

The purpose of the utility model is to provide a horizontal well logging safety cable head, which is used for horizontal well logging, can connect the cable with the instrument, and has the characteristics of safety, reliability and stable transmission of logging parameters. The deficiency that the logging parameters are affected in the prior art is overcome. the

The technical scheme adopted by the utility model is: a horizontal well logging safety cable head, which is mainly composed of a rope cap, a pin, an armored cone, an armored three-piece set, a connecting cylinder, a shear pin, a hoop spring, and a single-core sealing column. . It is characterized in that: the rope cap is in the shape of a cylinder, the outer wall of the upper end of the rope cap is in the shape of a cone, the cone at the upper end of the rope cap has an axial center hole, and the axial center hole is the penetration hole of the cable; there is a stepped center hole in the rope cap, There is an armored cone whose outer wall is a stepped cylinder in the upper top of the stepped center hole of the rope cap, the inner wall of the armored cone is conical, and there are armored three-piece sets inside the armored cone. The armored three-piece suit is assembled concentrically by three trumpet-shaped hollow round tables with increasing inner diameters. The material is 35 chromium molybdenum. The cable can pass through the center of the round table; there are screw holes evenly distributed in the circumferential direction on the wall of the rope cap. There is a screw in the screw hole, and the inner end of the screw is on the outer wall of the upper end of the armored cone. Tightening the screw can compress the upper end of the armored cone, so that the armored three-piece cover is fixed with the axis. There is a connecting cylinder in the center hole at the lower end of the rope cap, and the connecting cylinder and the lower end of the rope cap are cooperatingly connected with the axis. There is an annular groove on the outer wall of the rope cap, and the shear nail holes are evenly distributed in the annular groove of the rope cap. There is a shear pin in each shear nail hole, and the inner ends of the shear pin are respectively riveted into the pin holes on the outer wall of the connecting cylinder; There is a hoop spring on the outside of the pin, the hoop spring is circular, and the shear pin is fixed in the annular groove on the outer wall of the rope cap by the spring elastic deformation of the hoop spring; the four pins are fixed; there is a transverse spring at the lower end of the central hole of the connecting cylinder. In the partition wall, the connecting cylinder transverse partition wall has a central hole, and a single-core sealing column is fixed in the central hole of the connecting cylinder transverse partition wall. The single-core sealing column can be connected with the lower end test instrument. the

A brief description of the working principle and process of the utility model is helpful for connecting the utility model. See Figure 1. Fix the cable 1 in the rope cap 2 with an armored three-piece set 5, connect the horizontal well logging safety cable head with the cable 1, connect the rope cap 2 and the connecting cylinder 6 by means of the shear pin 7, the number of screws 3 can be Determine the pulling force of the horizontal well logging safety cable head. The single-core sealing column 9 is connected to the lower-end testing instrument. the

Beneficial effects of the utility model: The horizontal well logging safety cable head of the utility model can be connected with horizontal well testing instruments for horizontal well testing, is safe, reliable, can stably transmit logging parameters, and can withstand cable tension and bottom-hole pressure. Simple structure, suitable size, easy maintenance. The shearing pin 7 can determine the pulling force between the rope cap 2 and the connecting cylinder 6; in the case of need, it can also be salvaged after the pin is broken. the

Description of drawings

Fig. 1 is a schematic cross-sectional view of the utility model horizontal well logging safety cable head structure. the

In the figure, cable 1; rope cap 2; screw 3; armored cone 4; armored three-piece set 5; connecting cylinder 6; shear pin 7; the

Detailed ways

Embodiment 1: Taking a horizontal well logging safety cable head as an example, the utility model is further described in detail. the

See Figure 1. The utility model horizontal well logging safety cable head is mainly composed of a rope cap 2, a pin 3, an armored cone 4, an armored three-piece set 5, a connecting cylinder 6, a shear pin 7, a hoop spring 8, and a single-core sealing column. 9 composition. the

The rope cap 2 is cylindrical, and the outer diameter of the rope cap 2 is 38mm. The upper end outer wall of rope cap 2 is conical shape, and rope cap 2 upper end cones have the axial center hole that diameter is 4.5mm, and axial center hole is the penetration hole of cable 1. There is a stepped central hole in the rope cap 2, and an armored cone 4 whose outer wall is a stepped cylinder is arranged on the upper top of the rope cap 2 stepped central hole, and the inner wall of the armored cone 4 is conical. There is an armored three-piece set 5 inside the armored cone 4, and the armored three-piece set 5 is assembled concentrically by three trumpet-shaped hollow circular platforms with increasing inner diameters. The material is 35 chromium molybdenum, and the cable 5 can pass through the center of the circular platform. . On the wall of the rope cap 2, there are evenly distributed brother screw holes in the circumferential direction, and a screw 3 is arranged in each screw hole, and the inner end of the screw 3 is on the outer wall of the armored cone 4 upper end, and the tightening screw 3 can compress The upper end of the armored cone 4 makes the armored three-piece set 5 concentrically fixed. In the central hole of the lower end of the rope cap 2, a connecting cylinder 6 is arranged, and the connecting cylinder 6 is coaxially connected with the lower end of the rope cap 2. There is an annular groove on the outer wall of the rope cap 2, and the shear nail holes are evenly distributed in the annular groove of the rope cap 2. There is a shear pin 7 in each shear nail hole, and the inner ends of the shear pin 7 are respectively riveted into the pins on the outer wall of the connecting cylinder 6. inside the hole. There is a hoop spring 8 on the outside of the shear pin 7, and the hoop spring 8 is annular, and the spring elastic deformation of the hoop spring 8 is used to fix the shear pin 7 in the annular groove of the rope cap 2 outer walls. Fasten the four pins 7. There is a transverse partition wall at the lower end of the connecting cylinder 6 central holes, and the connecting cylinder 6 transverse dividing walls have a central hole with a diameter of 4mm, and a single core sealing column 9 is fixed in the central hole of the connecting cylinder 6 transverse dividing walls. the

Claims (1)

1. horizontal wellbore logging safety cable head, mainly by rope socket (2), pin (3), armouring cone (4), armouring three-piece (5), connecting cylinder (6), cut off nail (7), garter spring (8), single core sealing column (9) and form; It is characterized in that: rope socket (2) is the cylinder bodily form, and the upper end outer wall of rope socket (2) is a cone shape, and rope socket (2) upper end cone has axial center hole; Rope socket has the stepped central hole in (2), it is the cylindrical armouring cone of stairstepping (4) that an outer wall is arranged in the upper top in rope socket (2) stepped central hole, the inwall of armouring cone (4) is a taper seat shape, in the inside of armouring cone (4) armouring three-piece (5) is arranged, the hollow round platform concentric sets dress of three toroidals that armouring three-piece (5) is increased progressively successively by internal diameter, material is 35 chrome molybdenums; Circumferencial direction is evenly distributed with screw on the wall of rope socket (2), and a screw (3) is arranged in each screw, and the inner of screw (3) is on the outer wall of armouring cone (4) upper end; In the centre bore of rope socket (2) lower end connecting cylinder (6) is arranged, connecting cylinder (6) is connected with rope socket (2) lower end concentric; On rope socket (2) outer wall cannelure is arranged, even distribution shear pin hole in the cannelure of rope socket (2) has one and cuts off nail (7) in each shear pin hole, and the inner that cuts off nail (7) riveting is respectively gone in the pin hole of connecting cylinder (6) outer wall; In the outside that cuts off nail (7) garter spring (8) is arranged, garter spring (8) is an annular; In connecting cylinder (6) centre bore lower end cross wall is arranged, connecting cylinder (6) cross wall has centre bore, is fixed with a single core sealing column (9) in the centre bore of connecting cylinder (6) cross wall.

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