Coiled tubing clamping device and injection head using same

Abstract

The invention provides a coiled tubing clamping device and an injection head using the clamping device, belonging to the field of oil production and drilling equipment. The clamping device comprises a saddle-type clamping block, a clamping block seat and a gasket, wherein the saddle-type clamping block has a groove on the bottom; at least two pairs of hook blocks are arranged on the sidewall of the groove; the clamping block seat includes a hinge pin and a rolling shaft sleeve sheathed on the hinge pin; a position limiting stage and a bolt hole are arranged on the bottom of the clamping blockseat; bosses corresponding to the hook blocks of the clamping block are arranged on both sides of the bottom of the clamping block seat; and two through holes are formed on the lower part of the clamping block seat along the hinge pin direction. The injection head comprises an oil pipe clamping device and a transmission chain, wherein the oil pipe clamping device is mounted on the transmission chain through two hinge pin holes on the clamping block seat. The injection head is convenient in maintenance and has long service life by using the rolling shaft sleeve to substitute for a bearing. The clamping blocks are convenient in replacement, and have a large floating range so as to reduce the abrasion of the oil pipes during operation.

Description

technical field [0001] The invention relates to the field of oil drilling and production equipment, in particular to a coiled tubing clamping device, and also to an injection head using the clamping device. Background technique [0002] The injection head is the core component of the coiled tubing equipment, and the clamping device provides the clamping force for the injection head for conveying the coiled tubing. At present, the clamping block with rolling elements used on the injection head has the following defects: First, the rolling bearing used in the clamping device has a short service life, is difficult to maintain, and is inconvenient to lubricate. The main defect of the holding block; the second is that due to the variety of wellhead sizes in the oil field, the size of the coiled tubing used is also different, and the normal wear and tear, the injection head needs to replace the holding block frequently during operation, but the current holding block is in the hold...

AI Technical Summary

Problems solved by technology

The clamping block with rolling elements currently used on the injection head has the following defects: First, the rolling bearings used on the clamping device have a short service life, difficult maintenance, and inconvenient lubrication. The main defect of the holding block; the second is that due to the various sizes of the wellhead in the oil field, the size of the coiled tubing used is also different, and normal wear and tear, the injection head needs to frequently replace the holding block when it is working, but the current holding block is in the middle of the holding block. The seat is fixed in multiple places, and the replacement is complicated

Moreover, the mode of multiple fixings is used to make the movable gap of the clamping block on the clamping block seat less, which is unfavorable for the automatic adjustment when the clamping block clamps the oil pipe, resulting in a large impact of the clamping block on the oil pipe and wear on the oil pipe. serious

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