The invention discloses an arrow type drain valve for a casing pipe of a drilling platform. The arrow type drain valve is used for draining liquid and depressurizing inside the casing pipe and comprises a cylindrical valve body, a valve cavity, a runner, an arrow-shaped plug , lugs, a lifting hook and cups, wherein the valve cavity is arranged on the upper side of the inside of the valve body, the runner longitudinally runs through the upper side and the lower side of the valve body and the valve cavity, the arrow-shaped plug is arranged in the valve cavity and partially extends into the runner, the lugs are arranged on the top of the valve body, ends of the hood are connected with the lugs, and the cups are circularly arranged in the middle of the valve body. The arrow-shaped plug is provided with a handle portion and a tip portion, and a reset spring sleeves the handle portion so that the tip portion can extend into the runner to plug a runner opening of the bottom of the valve cavity. The drain valve for the casing pipe can sink to the position slightly above a pre-cut position along the inside of the casing pipe, the runner is closed and sealed by the arrow-shaped plug, the cups cling to the inner wall of the casing pipe, liquid in the casing pipe is separated into two parts, by this time, jetting can be avoided in the process of cutting the casing pipe, the casing pipe can be quickly cut and cutting efficiency is greatly improved.

Arrow type drain valve for casing pipe of drilling platform

The invention discloses a multifunctional running casing grouting device for well drilling The multifunctional running casing grouting device for well drilling comprises an outer cylinder (1) and an inner cylinder (2) which is moveably arranged in the outer cylinder, wherein the lower end of the inner cylinder stretches out of the lower end of the outer cylinder; a sealing ring (7) is arranged between the inner wall of the inner end of the outer cylinder and the outer wall of the inner cylinder; an axial chute (3) and at least two guide grooves (4) are formed in the inner wall of the middle section of the outer cylinder; the at least two guide grooves are distributed in the axial direction of the outer cylinder at intervals and are vertical to the axial chute; a positioning groove (5) extending downwards along the axial direction of the outer cylinder is formed in one end, far away from the axial chute, of each guide groove; the axial chute, the guide grooves and the positioning grooves are mutually communicated; a sliding block (6) capable of sliding in the axial chute, the guide grooves and the positioning grooves is arranged on the outer wall of the inner cylinder (2) The multifunctional running casing grouting device for well drilling can reduce underground casing adhesion risk and can increase the success ratio of large-displacement well length naked eye section running casing in place

Multifunctional running casing grouting device for well drilling

The invention discloses a module drilling machine optimal and fast casing running technical method. The module drilling machine optimal and fast casing running technical method includes a brand-new optimal and fast casing running mode different from a conventional casing running mode of a workover rig and drilling platform cranes cooperating with double pneumatic winches. The module drilling machine optimal and fast casing running technical method mainly includes the steps that before drilling and completion operation, long hanging rings are selected as top drive hanging rings; casings are arranged in a casing deck sleeper area, and a casing chart is made according to the sequential serial numbers; an optimal and fast casing running working table is put in place; connection with a continuous grouting pipeline is performed; a crane is adopted to lift the multiple casings onto the optimal and fast casing running working table at a time, male buckle ends are located at a working table baffle, and female buckle ends are located at a drilling platform gate; lifting hooks and lifting cables are released, and the crane pulls a rod to prepare to transfer the other casings onto the optimaland fast casing running working table; a pneumatic winch on a drilling platform adopts a lifting belt to hold the bottoms of the casings and make the casings be lifted up and leave the catwalk surface; and after a traveling block is set, a suspension arm tilts to be matched with the pneumatic winch for elevator buckling. According to the module drilling machine optimal and fast casing running technical method, the structure is simple, the investment cost is low, the operation labor cost and the equipment cost are reduced, and the using efficiency of on-site equipment is greatly improved.

Module drilling machine optimal and fast casing running technical method

The invention provides a well drilling method using a combination system of a screw and a rotary guide tool. The well drilling method comprises the steps that a borehole is divided into a well sectionwith a low overall angle change rate, a well section with a middle overall angle change rate and a well section with a high overall angle change rate according to the overall angle change rate of theborehole, specifically, the overall angle change rate of the well section with the low overall angle change rate is smaller than the overall angle change rate of the well section with the middle overall angle change rate, and the overall angle change rate of the well section with the middle overall angle change rate is smaller than the overall angle change rate of the well section with the high overall angle change rate; and a drilling tool with the combination system of the screw and the rotary guide tool is used for drilling, during the drilling process, a first top drive rotating speed isused when the screw is in the well section with the low overall angle change rate, a second top drive rotating speed is used when the screw is in the well section with the middle overall angle changerate, a third top drive rotating speed is used when the screw is in the well section with the high overall angle change rate, specifically, the first top drive rotating speed is greater than the second top drive rotating speed, and the second top drive rotating speed is greater than the third top drive rotating speed. According to the well drilling method, through increasing the top drive rotatingspeed during drilling, the mechanical drilling speed can be further increased, the borehole cleaning during drilling is improved, the height of a debris bed is reduced, and the risk of downhole accidents such as debris avalanche and sand bridge sticking is reduced.

Well drilling method using combination system of screw and rotary guide tool

The invention discloses a manufacturing method of an automatic-closing furnace body valve. The manufacturing method of the automatic-closing furnace body valve comprises the steps of preparing materials, punch-forming, welding a hanging ring, polishing, alkali-washing for unoiling, acid pickling, drying, detecting and installing. According to the manufacturing method of the automatic-closing furnace body valve provided by the invention, through a series of operation such as preparing the materials, punch-forming, welding the hanging ring, polishing, alkali-washing for unoiling, acid pickling,drying, detecting and installing, a copper plug plate with a good sealing performance can be manufactured, oil stains and an active agent on the surface of the piston plate are eliminated, the smoothness of the copper plug plate is favorably improve, and the copper plug plate can be favorably long-acting used; through the function of an anti-corrosion layer, the copper plug plate is effectively prevented from being corroded, so that the corrosion resistance of the copper plug plate is improved, and the service life of the copper plug plate is greatly prolonged; a high-temperature-resistant rubber layer is coated on the outer wall of the copper plug plate, so that a sealing performance on a discharge pipe is improved through the elastic function of the high-temperature-resistant rubber layer, and the copper plug plate is smoothly plugged into the bottom part of the discharge pipe; and under the elastic function of a spring, the copper plug plate can automatically seal the bottom part ofthe discharge pipe.

Manufacturing method of automatic-closing furnace body valve

The invention discloses a well completion production pipe string capable of mining at the lower part and injecting at the upper part and with an electric submersible pump. The well completion production pipe string comprises a bushing capable of mining at the lower part and well injecting at the upper part, an oil pipe arranged in the bushing and a downhole tool arranged on the oil pipe. The downhole tool comprises a downhole safety valve arranged at the upper part of the oil pipe and connected with a hydraulic control pipeline and a bushing layering packer arranged at the bottom of the oil pipe and provided with a sealing barrel. The bushing layering packer is provided with a positioning sealing part in a matched mode. An over-cable production packer with an air releasing valve, a workingbarrel and a sealed electric submersible pump system are connected between the downhole safety valve and the positioning sealing part in sequence from top to bottom. An upper reservoir and a lower reservoir of the bushing are separated through the bushing layering packer. A positioning sealing guiding shoe is arranged at the lower end part of the oil pipe. According to the well completion production pipe string, the facts that precise water injecting of the upper reservoir is achieved through an annulus access and pumping production or precise water injecting of the lower reservoir is achieved through a sealing system and a channel in the oil pipe are achieved, and the annulus access and the channel in the oil pipe are independent and noninteracting, so that the upper reservoir and the lower reservoir of one well are controlled independently, and the cost of oilfield development and maintenance is reduced.

Well completion production pipe string capable of mining at lower part and injecting at upper part and with electric submersible pump

The utility model discloses a multifunctional casing running and grouting device for well drilling. The multifunctional casing running and grouting device for well drilling comprises an outer barrel (1) and an inner barrel (2) movably arranged in the outer barrel. The lower end of the inner barrel extends out from the lower end of the outer barrel, and a sealing ring (7) is arranged between the inner wall of the lower end of the outer barrel and the outer wall of the inner barrel; an axial sliding groove (3) and at least two guide grooves (4) are formed in the inner wall in the middle section of the outer barrel, the guide grooves are distributed at intervals in the axial direction of the outer barrel and perpendicular to the axial sliding groove, a locating groove (5) extending downwards in the axial direction of the outer barrel is arranged at one end, far from the axial sliding groove, of each guide groove, and the axial sliding groove, the guide grooves and the locating grooves are communicated mutually; and sliders (6) capable of sliding in the axial sliding groove, the guide grooves and the locating grooves are arranged on the outer wall of the inner barrel (2). By means of the multifunctional casing running and grouting device for well drilling, blocking risks of underground casings can be reduced, and success rates of in-place casing running of large-displacement well long open hole sections can be improved.

Multifunctional casing running and grouting device for well drilling

The utility model discloses an arrow type liquid draining valve for a casing pipe of a drilling platform. The arrow type liquid draining valve is used for draining liquid and decompressing pressure in the casing pipe. The arrow type liquid draining valve for the casing pipe of the drilling platform comprises a cylindrical valve body, a valve cavity, a runner, an arrow-shaped plug, a lifting lug, a lifting hook and a leather bowl, wherein the valve cavity is formed in the upper side of the valve body, the runner longitudinally penetrates through the upper side and the lower side of the valve body and the valve cavity, the arrow-shaped plug is arranged in the valve cavity and partially extends into the runner, the lifting lug is arranged at the top of the valve body, the end of the lifting hook is connected with the lifting lug, and the leather bowl surrounds the middle of the valve body. The arrow-shaped plug is provided with a handle portion and a tip portion, wherein the handle portion is sleeved by a return spring in a surrounding mode to enable the tip portion to extend into the runner to block a runner opening formed in the bottom of the valve cavity. The liquid draining valve for the casing pipe can sink in the casing pipe along the casing pipe to the position above the precut position, the arrow-shaped plug closes and seals the runner, and the leather bowl is attached to the inner wall of the casing pipe to divide liquid in the casing pipe into two parts. Thus, injection is avoided when the casing pipe is cut, the casing pipe can be cut quickly, and the cutting efficiency is greatly improved.

Arrow type liquid draining valve for casing pipe of drilling platform

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