DMS CASING ANCHOR
The structure of the DMS casing anchor is designed with two stages of fluke with different lengths. The first stage is shorter fluke adapted to the borehole with reduced diameter and hard formation, and the second stage is suitable for the borehole with loose and expanded diameter. During the anchoring process, the two stages can interact with each other. The first stage opens first during construction. When the strength of the first stage is insufficient, the second stage opens automatically for joint anchoring, complementing each other. The outer diameter of the anchor jaw is large, up to 560mm. The tool is equipped with an anchor claw locking mechanism to prevent accidental opening during down hole process. Built-in floating hoops, float shoes and guide shoes reduce completion string costs. The two-stage flugs are distributed symmetrically at 90° along the axial direction. This design can not only improve the strength of the anchor, but also improve the adaptability and reliability of the anchor, so as to ensure the successful application of the anchor in shallow loose expanding formation, deep reducing diameter borehole and irregular hard borehole. The two-stage casing anchor at the lower end of the casing string and directly connected with the casing. After the casing reaches the bottom of the well, the pump is circulated, and the drilling fluid is returned from the circulation hole. Normal cementing and impact pressure. After the rubber plug is pressed, sit on the upper rubber plug of the ground anchor, and then slowly hold back the pressure. When the pressure reaches 15-20 MPa, cut the shear pin, the ground anchor rubber plug seat moves down, push the center tube and the connecting rod group, and open The two-stage anchor claw makes it anchored to the well wall, and the prestress of the wellhead lifting reaches the designed tonnage or length under the pressure holding state, and the casing is set afterwards, and the prestress construction of the lifting casing is completed.
MULTI-FUNCTION CASING SCRAPER
Multi-function casing scraper is a new type casing scraper, it can work as non-rotating fixed type casing scraper, and also can work as a rotating type casing scraper. Besides normal cleaning operation, it should stop running in the drill string when stuck, then should connect the washover tools, and applying some pull force to shear the pin, then shift to rotating mode, then proceed releasing stuck operation, like providing a torque, pushing, circulation and jarring until recover the normal situation, then continue to run in drill string.
JY CASING SCRAPER
JY casing scraper can work as non-rotating fixed type casing scraper, and also can work as a rotating type casing scraper. When it used as fixed casing scraper, as long as increase adjustable pad locates in top sub to make it not rotate, otherwise decrease adjustable pad, it will be used as rotating casing scraper. It is mainly used in cleaning cement, sandy, residual bullets, scratches, paraffin, burs and other attachments from inner wall of casing, in order to keep inner wall of casing clean.
Casing scraper is mainly used in cleaning cement, sandy, residual bullets, scratches, paraffin, burs and other attachments from inner wall of casing, to keep inner wall of casing clean,so as to run into various downhole tools.
MARINE CASING CUTTER
Marine casing cutter is one of tools which cuts the casing internally. It uses water horsepower to drive cutters work, it has reasonable structure and convenient maintenance, faster cutting speed. When cutting multi-layer non-concentric casings, it could bear strenuous vibration. Strong cutter arms can extend to 5 times as much as body diameter, so as to get maximum stability performance under various adverse cutting condition (including hard point, decentration, discontinuous cutting etc).
MECHANICAL INTERNAL CUTTER
Mechanical internal cutter is a tool which is used for cutting downhole fixed (or stuck) pipe from inner of casing, it can work at any place except joint and coupling.
MECHANICAL EXTERNAL CUTTER
This type of mechanical external cutter is a mechanical cutting tool that cuts from the outside of casing, tubing, drill pipe, etc. It can cut from outside of pipe and take out the cutting section, it uses spring automatic running, and avoid accident by driller’s negligence which cause excessive pulling force and destroy cutter. It is normally connected with washover pipe, so as to cut and take out the pipe at proper position, it needs to change different cutter for different spec. pipes and change the corresponding clamping sleeve.
The washover pipe is a necessary tool for performing washover operation, and washover operation can relieve various of sticking accidents in the well. In addition to rotary washover function, it can also sand washover, salt washover,hot washing and deblockingetc.
Casing swage is one special tool to repair slightly deformed casing which use for oil, gas and water well, recover the original casing drift diameter to meet various requirement of downhole operation.Casing swage can repair slightly deformed casing, maximum up to 98%. It consists of eccentric shaft, top roller, middle roller, bottom roller, taper roller and plug.With the advantages of easy to operate and control, wide range of application, harmless to casing, effectively solvethe deformed casing and resume production timely.