CN2721859Y

CN2721859Y - Bias wheel callipers of polish rod

Info

Publication number: CN2721859Y
Application number: CN 200420009030
Authority: CN
Inventors: 朱福金; 陈茂谦; 常仁光; 李广永; 岳振江
Original assignee: HENGXINGLIDA INSTRUMENT CO Ltd BEIJING
Current assignee: HENGXINGLIDA INSTRUMENT CO Ltd BEIJING
Priority date: 2004-05-17
Filing date: 2004-05-17
Publication date: 2005-08-31
Anticipated expiration: 2014-05-17

Abstract

The utility model relates to a pair of bias wheel callipers of a polish rod, which belongs to the field of a drilling device used in an oilfield. The clamping base has a hole, and a spring mandrel is arranged in the hole. One end of the spring mandrel is larger than the diameter of the hole. A spring adapts to the periphery of the spring mandrel. A reduced hole on one end of the clamping base blocks off the spring and an adaptive spring mandrel penetrates the reduced hole. The spring mandrel which penetrates the reduced hole is screwed with the hole of a cam shaft. The cam shaft is clamped and fixed with the eccentric cam by screws. The eccentric cam has an adaptive small spring in the hole, and the small spring compacts a steel ball which is embedded in the concave pit on the clamping base. A big handle is fixedly connected with the eccentric cam, and a small handle is fixedly connected with the clamping base. A magnet at the position which is parallel with the eccentric cam forms a jaw to the polish rod. The magnet is fixedly connected with the clamping base. The utility model has simple structure, and is conveniently clamped with the borehole apparatus on the polish rod when the wellhead of the oil well in the oilfield replaces a packing or carries out other operations. The bias wheel callipers of polish rod can be operated by one man, is labor saving, and avoids the body harm.

Description

A kind of polished rod is taken turns clamp partially

Affiliated technical field

The utility model relates to a kind of polished rod and takes turns clamp partially, belongs to oil drilling device field.

Background technology

When the oilfield well head being changed packing or other operation, often need two people, a people firmly holds up the wellhead assembly that is enclosed within on the polished rod, one people operates below, the effort of not only taking a lot of work, and in case careless omission is arranged slightly, wellhead assembly falls down to well head, then might cause personal injury.

Summary of the invention

In order to overcome the deficiency of existing technology, the utility model provides a kind of polished rod to take turns clamp partially, can block the polished rod at well head place easily and effectively safely and hold wellhead assembly, its clamping force adjustable size joint.Safe ready is saved manpower.

The technical scheme that its technical problem that solves the utility model adopts is: deck is arranged, central spindle of the spring, rubber pad, spring, camshaft, eccentric cam, screw, steel ball, big handle, miniature lever, magnet, deck is porose, adaptive central spindle of the spring in the hole, one end of central spindle of the spring is greater than the diameter in hole, circumference one end of described central spindle of the spring and the adaptive central spindle of the spring in hole has rubber pad to be installed between deck and the central spindle of the spring, the periphery of central spindle of the spring has spring adaptive, one end in the hole of deck has the hole that dwindles to block spring and has adaptive central spindle of the spring to pass, the central spindle of the spring that passes is threaded with the hole of camshaft, camshaft and eccentric cam are fixed by screws clamp, adaptive little spring during eccentric cam is porose, little spring compresses steel ball, in the pit on the steel ball embedding deck, big handle is fixedlyed connected with eccentric cam, miniature lever is fixedlyed connected with deck, and the position that parallels with eccentric cam has magnet to form jaw to polished rod, and magnet is fixedlyed connected with deck.

Jaw position deck during use snaps in polished rod, magnet by the deck left end is inhaled polished rod and deck together, pull big handle downwards, when the concave groove on the eccentric cam is pushed down polished rod and is continued to pull big handle downwards, eccentric cam, camshaft, big handle and central spindle of the spring move right with the increase of eccentric arm together, the thrust of spring and rubber pad acts on the contact surface of eccentric cam and polished rod simultaneously, thus the locking polished rod.When big handle continuation touched polished rod down to handle ball, compressing on the eccentric cam a little striden across maximum radius, thereby under free state, eccentric cam can not unclamp automatically, can guarantee safety.Rotation spring mandrel adjustable eccentric cam is to the thrust of polished rod.

The beneficial effects of the utility model are simple in structure, when the oilfield well head being changed packing or other operation, block the wellhead assembly on the polished rod easily, but the one man operation saves labor and avoids personal injury.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is a structure chart of the present utility model.

Fig. 3 is a sectional view of the present utility model.

Fig. 4 is a structure chart of the present utility model.

Fig. 5 is a structure chart of the present utility model.

The specific embodiment

Embodiment 1: at Fig. 1, Fig. 2, Fig. 3, among Fig. 4, deck 1 is porose, adaptive central spindle of the spring 12 in the hole, one end of central spindle of the spring 12 is greater than the diameter in hole, circumference one end of described central spindle of the spring 12 and the adaptive central spindle of the spring 12 in hole has rubber pad 13 to be installed between deck 1 and the central spindle of the spring 12, the periphery of central spindle of the spring 12 has spring 2 adaptive, one end in the hole of deck 1 has the hole that dwindles to block spring 2 and has adaptive central spindle of the spring 12 to pass, the central spindle of the spring 12 that passes is threaded with the hole of camshaft 5, camshaft 5 is fixedly clamped by screw 3 with eccentric cam 4, adaptive little spring 11 during eccentric cam 4 is porose, little spring 11 compresses steel ball 10, in the pit that steel ball 10 embeds on the deck 1, big handle 8 is fixedlyed connected with eccentric cam 4, miniature lever 6 is fixedlyed connected with deck 1, the jaw 15 that the position that parallels with eccentric cam 4 has magnet 14 to form polished rod, and magnet 14 is fixedlyed connected with deck 1.

Jaw 15 positions deck 1 during use snap in polished rod 20, magnet 14 by deck 1 left end is inhaled polished rod 20 and deck 1 together, pull big handle 8 downwards, when the concave groove on the eccentric cam 4 is pushed down polished rod 20 and continue to pull big handle 8 downwards, eccentric cam 4, camshaft 5, big handle 8 and central spindle of the spring 12 move right with the increase of eccentric arm together, the thrust of spring 2 and rubber pad 13 acts on the contact surface of eccentric cam 4 and polished rod 20 simultaneously, thus locking polished rod 20.When big handle 8 continuation touched polished rod 20 down to handle ball 9, compressing on the eccentric cam 4 a little striden across maximum radius, thereby under free state, eccentric cam 4 can not unclamp automatically, can guarantee safety.The thrust of 4 pairs of polished rods 20 of rotation spring mandrel 12 adjustable eccentric cams.

As shown in Figure 4, the jaw 15 of clamp is aimed at polished rod 20, pull big handle 8 downwards, can lock polished rod 20, and hold wellhead assembly 30.

Embodiment 2: eccentric cam 4 can have other distortion, and as shown in Figure 5: with the contact position of eccentric cam 4 with polished rod 20, add a roller 21, compress in the process of polished rod 20 at eccentric cam 4 like this, sliding friction has just become rolling friction.

Claims

1. a polished rod is taken turns clamp partially, deck is arranged, central spindle of the spring, rubber pad, spring, camshaft, eccentric cam, screw, steel ball, big handle, miniature lever, magnet, it is characterized in that: deck is porose, adaptive central spindle of the spring in the hole, one end of central spindle of the spring is greater than the diameter in hole, circumference one end of described central spindle of the spring and the adaptive central spindle of the spring in hole has rubber pad to be installed between deck and the central spindle of the spring, the periphery of central spindle of the spring has spring adaptive, one end in the hole of deck has the hole that dwindles to block spring and has adaptive central spindle of the spring to pass, the central spindle of the spring that passes is threaded with the hole of camshaft, camshaft and eccentric cam are fixed by screws clamp, adaptive little spring during eccentric cam is porose, little spring compresses steel ball, in the pit on the steel ball embedding deck, big handle is fixedlyed connected with eccentric cam, and miniature lever is fixedlyed connected with deck, the position that parallels with eccentric cam has magnet to form jaw to polished rod, and magnet is fixedlyed connected with deck.

2. a kind of polished rod according to claim 1 is taken turns clamp partially, it is characterized in that: it is rolling friction that the contact position of eccentric cam and polished rod adds a roller.