Scraper for inner wall of underground casing
The utility model relates to a drilling engineering technical field, concretely relates to casing inner wall scraper in pit.
The drilling of wells from the ground by mechanical equipment or manpower is called drilling, which generally refers to the engineering of drilling boreholes and large-diameter water supply wells for exploring or developing liquid and gaseous minerals such as oil, natural gas and the like, the drilling of wells is widely applied in national economic construction, the drilling of wells is widely performed in oil (gas) fields in China at present, the drilling of wells is mainly performed by using a rotary table drill, the main equipment is provided with a derrick, an operation platform, a diesel engine, a drilling machine, a drilling tool, a slurry pump, a generator, test equipment, a fuel oil tank, a boiler and the like, the drilling diameter and the depth are large depending on the drilling application and the mineral burial depth and the like, the drilling of oil, natural gas and underground water is mainly performed by ① acquiring underground physical data, namely cores, rock cuttings, liquid samples, gaseous samples and the like from well drilling, ② is used as a geophysical well logging channel, acquiring data of various geophysical fields of rock and mineral layers, ③ is used as a manual channel for observing the dynamic conditions of underground water and geological strata, ④ is used for exploring, mining and developing underground water drilling, geological exploration and rock, drilling are generally divided into drilling well drilling, water drilling, rock breaking and rock breaking are performed from ground, ground drilling.
In the process of well drilling and completion construction, the original underground casing and the casing which is put into the well are overlapped more, and cement slurry is required to be sealed, in order to improve the well cementation quality of the cement slurry, the scraper is often put into the well to carry out inner wall cleaning operation on the technical casing which is already put into the well, the intersection strength of the cement slurry and the inner wall of the casing is improved, and meanwhile, the inner wall of the original casing cannot be damaged, so that the scraper which is put into the casing before well cementation construction scrapes the inner wall, and mud cakes and rock debris adhered to the inner wall of the casing are removed.
Common tools for scraping the pipe are a milling cone and a pipe scraper, the milling cone is not widely used because the milling cone easily causes certain damage to the sleeve, and the pipe scraping efficiency is low because the existing pipe scraper is not enough in blade material, less in blade, short in service life and the like; in addition, some existing scrapers adopt a sizing structure, cannot directly enter a sleeve with thick dirt, and can also cause the problem of being clamped in the sleeve during scraping.
Based on this, the utility model designs a casing inner wall scraper in pit to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model has the main purpose of overcoming at least one defect in the prior art and providing a scraper for the inner wall of an underground casing pipe, which solves the problem of low pipe scraping efficiency caused by insufficient material of blades, fewer blades, short service life and the like of the prior pipe scraper in the background art; in addition, some existing scrapers adopt a sizing structure, cannot directly enter a sleeve with thick dirt, and can also cause the problem of being clamped in the sleeve during scraping.
In order to realize the technical scheme, the utility model discloses a following technical scheme:
the utility model provides a casing inner wall scraper in pit, includes rotatory pipe, rotary rod both ends difference fixedly connected with flange and top connection, the flange passes through the bolt can be dismantled and connects in the bottom connection, the ring channel has been seted up in the rotatory outside of tubes, ring channel bottom fixed connection is in compression spring's one end, compression spring's other end fixed connection is in scraping the board, scrape board upper end fixedly connected with multiunit scraper, the upper end outside cover that rotatory pipe is located the ring channel is equipped with the heating block, rotatory pipe is located the heating block upper end outside fixedly connected with and rights the piece.
Preferably, the outer side of one end of the lower joint, which is far away from the rotating pipe, is provided with a thread.
Preferably, the scraping plate is inclined at an angle of 18-23 degrees.
Preferably, the ring channel both ends all are equipped with the slide rail, scrape the equal fixedly connected with slide rail of board both ends downside and mutually support the slider.
Preferably, a storage battery is arranged in the rotating pipe and is electrically connected to the heating block through a lead.
Preferably, the blade surface of the scraper is embedded with diamond.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a compression spring can guarantee scraper and inside pipe wall's abundant contact to ensure that the scraper can effectively clear away the foreign matter on the inside pipe wall, when meetting harder hard wax or salt dirt, accessible heating block heats inside pipe wall's hard wax or salt dirt, the scraping of the blade of being convenient for, the effect of scraping the ware has been guaranteed more, furthermore, the scraper is whole to be spiral structure, can carry out annular scraping to the intraductal with the sleeve pipe contact during scraping, scrape efficiently, it is neat and clean, can go into other downhole tools such as packer smoothly after the brill.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the inner structure of the annular groove in FIG. 1 according to the present invention;
fig. 3 is a schematic view of the connection structure of the heating block in fig. 1 according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-rotating pipe, 2-flange, 3-upper joint, 4-lower joint, 5-annular groove, 6-compression spring, 7-scraping plate, 8-scraper, 9-heating block, 10-righting block, 11-screw thread, 12-slide rail, 13-slide block and 14-storage battery.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Please refer to fig. 1-3, the utility model relates to a downhole casing inner wall scraper, including rotatory pipe 1, 1 both ends of rotary rod are fixedly connected with flange 2 and top connection 3 respectively, flange 2 can dismantle through the bolt and connect in bottom connection 4, ring channel 5 has been seted up in the rotatory 1 outside of pipe, 5 bottom fixed connection of ring channel are in compression spring 6's one end, compression spring 6's other end fixed connection is in scraping board 7, scrape board 7 upper end fixedly connected with multiunit scraper 8, the upper end outside cover that rotatory pipe 1 is located ring channel 5 is equipped with heating block 9, rotatory pipe 1 is located heating block 9 upper end outside fixedly connected with righting block 10.
Wherein, the one end outside of the rotatory pipe 1 is kept away from to the lower clutch is equipped with screw thread 11, and screw thread 11 can be used to connect the drill bit of different models, convenient to detach and installation. The scraping plate 7 is arranged obliquely, the inclination angle is 18-23 degrees, and the grinding resistance is small at the angle, so that the cleaning of the inner wall of the sleeve is facilitated. The annular groove 5 both ends all are equipped with slide rail 12, and the equal fixedly connected with slide rail 12 slider 13 of mutually supporting of scraping board 7 both ends downside, slider 13 and slide rail 12's interconnect can be injectd scraping board 7's position, prevent the skew, make to scrape the clearance effect better. The storage battery 14 is arranged in the rotating pipe 1, the storage battery 14 is electrically connected to the heating block 9 through a lead, and the storage battery 14 can provide electric energy for the heating block 9. The blade surface of the scraper 8 is embedded with diamonds, and the diamonds can enhance the strength of the scraper 8 and prevent cracking.
One specific application of this embodiment is: during the use, the drilling tool of different models is connected to accessible screw thread 11, in order to satisfy the sleeve pipe of different models, after fixed the completion, put into the sleeve pipe with the sleeve pipe scraper again, at this moment, compression spring 6 provides elasticity, the scraping plate 7 and the scraper 8 of the upper end that make move up, can guarantee the abundant contact of scraper 8 and inside pipe wall, thereby ensure that scraper 14 can effectively clear away the foreign matter on the inside pipe wall, the rotatory pipe 1 of sleeve pipe scraper is rotatory along the drill post when the drill bit advances the chi, scraper 8 produces the friction with the wall of a well, it clears up to follow the drill post and cut the wall of a well attachment along advancing the chi, when meetting harder hard wax or salt deposit, accessible heating block 9 heats the hard wax or the salt deposit of inside pipe wall, be convenient for scraper 8 to scrape, the effect of scraping of scraper has been guaranteed more, it clears up in advance to hold up piece 10 to the bold attachment of inside pipe wall to lead to the clear up simultaneously, can reduce the resistance when scraper 8 clears up the pipe wall and overcome and lead to too big 8 elastic deformation because of scraper because The life problem is solved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.