Coiled tubing clamping device and injection head using same

Abstract

The invention provides a coiled tubing clamping device and an injection head using the same, belonging to the field of oil production and drilling equipment. The clamping device includes a saddle-type clamping block and a clamping block seat, wherein the saddle-type clamping block is connected to the clamping block seat. The clamping device is characterized in that two sides of the saddle-type clamping block are provided with tongue-like platforms, the tongue-like platform is provided with an opening hole, the back part of the saddle-type clamping block is provided with a recess, two sides of the clamping block seat are respectively provided with a pair of bosses, the recess of the saddle-type clamping block is inserted into a slot formed by the clamping block seat bosses, a running clearance is left between the recess and the slot, and the clamping block seat is provided with a positioning screw for limiting the position of the saddle-type clamping block. The injection head comprises an oil pipe clamping mechanism and a transmission chain, wherein the oil pipe clamping mechanism is mounted on the transmission chain through two hinge pin holes on the clamping block seat. The technical proposal has the advantages that the abrasion of the oil pipe can be effectively reduced, the clamping device has operational reliability, and the clamping blocks are convenient in replacement.

Description

technical field [0001] The invention relates to the field of oil drilling and production equipment, in particular to a clamping mechanism for a coiled tubing, and an injection head using the clamping mechanism. Background technique [0002] The injection head is the core component of the coiled tubing equipment, and the clamping mechanism provides the clamping force for the injection head to transport the coiled tubing. The clamping mechanism with rolling bodies used on the commonly used injection head has the following defects due to the connection structure between the clamping block and the clamping block seat: one is that the clamping block used on the clamping mechanism cannot be clamped Sliding on the holding block seat is not conducive to the active centering adjustment of the clamping block, resulting in wear of the oil pipe and reducing the service life of the oil pipe; the second is the traditional clamping mechanism, the direct contact between the clamping block a...

AI Technical Summary

Problems solved by technology

The clamping mechanism with rolling bodies used on the commonly used injection head has the following defects due to the connection structure between the clamping block and the clamping block seat: one is that the clamping block used on the clamping mechanism cannot be clamped Sliding on the holding block seat is not conducive to the active centering adjustment of the clamping block, resulting in wear of the oil pipe and reducing the service life of the oil pipe; the second is the traditional clamping mechanism, the direct contact between the clamping block and the holding block seat is not conducive to Buffer the impact of the clamping block on the oil pipe, causing serious wear to the oil pipe

Although this has better solved the above-mentioned problems caused by the inability of the clamping block to move, and made it easier to replace the clamping block, it still has the following disadvantages: due to the random movement of the clamping block in the work, the limit bolts are affected. Frequent shear force causes the limit bolt to break frequently, which affects the continuous operation of the injection head; when replacing the clamping block, it is necessary to move the clamping block along the direction of the oil pipe to unhook the hook block and the boss, which is inconvenient to operate

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